1 00:00:15,356 --> 00:00:23,036 Speaker 1: Pushkin. I'm Jacob Goldstein. This is What's Your Problem, the 2 00:00:23,076 --> 00:00:25,116 Speaker 1: show where I talk to people who are trying to 3 00:00:25,196 --> 00:00:30,196 Speaker 1: make technological progress. My guest today is Gia Schneider. Ga 4 00:00:30,276 --> 00:00:33,796 Speaker 1: is the co founder and CEO of Natel Energy, and 5 00:00:33,876 --> 00:00:37,476 Speaker 1: her problem is this, can you get all the good 6 00:00:37,596 --> 00:00:47,676 Speaker 1: parts of hydro electric power without the bad? In order 7 00:00:47,756 --> 00:00:51,396 Speaker 1: to solve that problem, there's sort of two sub problems 8 00:00:51,436 --> 00:00:54,876 Speaker 1: that Gia has to solve. First, how do you build 9 00:00:54,916 --> 00:00:57,916 Speaker 1: a turbine that can go into a river and generate 10 00:00:57,996 --> 00:01:02,516 Speaker 1: power without chopping up fish? That, as you'll hear in 11 00:01:02,556 --> 00:01:06,076 Speaker 1: the first part of the show, is an interesting engineering challenge. 12 00:01:06,756 --> 00:01:09,436 Speaker 1: And then in the second part of the show, Gia 13 00:01:09,476 --> 00:01:12,396 Speaker 1: talks about a second problem to solve, how do you 14 00:01:12,436 --> 00:01:16,276 Speaker 1: put dams in rivers without messing up the broader ecosystem? 15 00:01:16,836 --> 00:01:18,836 Speaker 1: And I have to say I found that part of 16 00:01:18,876 --> 00:01:23,596 Speaker 1: the conversation particularly interesting. For one thing, it involves beavers, 17 00:01:23,996 --> 00:01:27,796 Speaker 1: always fun. Second, and perhaps more importantly, that part of 18 00:01:27,796 --> 00:01:33,836 Speaker 1: the conversation changed the way I think about rivers. So 19 00:01:34,716 --> 00:01:36,596 Speaker 1: let's start with the Let's start with the happy. Why 20 00:01:36,636 --> 00:01:37,556 Speaker 1: is hydro power great? 21 00:01:38,436 --> 00:01:42,036 Speaker 2: Yeah, hydropower is a great source of energy because it 22 00:01:42,196 --> 00:01:46,636 Speaker 2: is reliable and predictable. What that means is that if 23 00:01:46,636 --> 00:01:48,956 Speaker 2: I'm sitting here today and I'm looking forward at what 24 00:01:48,996 --> 00:01:51,196 Speaker 2: I can expect to get out of my power plant 25 00:01:51,196 --> 00:01:53,596 Speaker 2: over to say, the next day, the next week, I 26 00:01:53,676 --> 00:01:56,836 Speaker 2: have a very good idea of what I will get 27 00:01:56,876 --> 00:02:00,236 Speaker 2: minute to minute, hour to hour. And that reliability is 28 00:02:00,276 --> 00:02:04,916 Speaker 2: really valuable in terms of balancing out the operation of 29 00:02:04,916 --> 00:02:06,556 Speaker 2: a grid and keeping a grid reliable. 30 00:02:06,996 --> 00:02:10,036 Speaker 1: Right that, and that is not true. Were not as 31 00:02:10,076 --> 00:02:13,316 Speaker 1: true importantly of solar power or wind power. Right, those 32 00:02:13,316 --> 00:02:16,876 Speaker 1: are more intermittent and less predictable. So those are reasons 33 00:02:16,916 --> 00:02:21,156 Speaker 1: why hydro power is great. Why is hydro power bad? 34 00:02:21,356 --> 00:02:26,276 Speaker 2: What's the problem? Yeah, so hydro is The challenges with 35 00:02:26,356 --> 00:02:28,636 Speaker 2: hydro or the negatives really come from the fact that 36 00:02:29,036 --> 00:02:33,796 Speaker 2: the way in which hydropower works is by taking water 37 00:02:34,036 --> 00:02:37,716 Speaker 2: and moving it across an elevation drop through a turbine. 38 00:02:37,796 --> 00:02:40,436 Speaker 2: And to get that elevation drop, we generally have built dams, 39 00:02:40,716 --> 00:02:43,556 Speaker 2: and those dams then change the way in which rivers 40 00:02:43,636 --> 00:02:47,516 Speaker 2: flow in sometimes very material ways, and rivers are effectively 41 00:02:47,556 --> 00:02:49,916 Speaker 2: the circulatory system of the planet. And so as you 42 00:02:49,916 --> 00:02:53,516 Speaker 2: can imagine, as you start to like change those flow patterns, 43 00:02:53,556 --> 00:02:58,116 Speaker 2: that has some real implications for the ecosystem around those rivers. 44 00:02:58,396 --> 00:03:00,876 Speaker 1: Right, So dams can mess up the rivers, correct, and 45 00:03:00,956 --> 00:03:03,716 Speaker 1: then the turbines themselves can be bad as well. 46 00:03:03,796 --> 00:03:07,396 Speaker 2: Right, Yeah, the turbines themselves, and you know have they 47 00:03:07,436 --> 00:03:12,596 Speaker 2: are amazing machines that have been highly engineered for high 48 00:03:12,676 --> 00:03:18,236 Speaker 2: efficiency and performance. They are, they're very outstanding engineering products. 49 00:03:18,636 --> 00:03:21,476 Speaker 2: At the same time, they aren't very safe in many 50 00:03:21,516 --> 00:03:24,556 Speaker 2: cases for passage of aquatic life. 51 00:03:24,876 --> 00:03:27,036 Speaker 1: They're like fish blenders in the middle of the river. 52 00:03:27,316 --> 00:03:29,836 Speaker 2: It's not necessarily always quite as bad as fish blenders, 53 00:03:29,836 --> 00:03:31,916 Speaker 2: but yes, bottom line is you can kind of average 54 00:03:31,956 --> 00:03:33,676 Speaker 2: it out and say like one in five fish through 55 00:03:33,716 --> 00:03:36,596 Speaker 2: a conventional turbine generally won't survive. 56 00:03:37,276 --> 00:03:39,956 Speaker 1: So there's sort of two levels of problems. One is 57 00:03:40,036 --> 00:03:43,276 Speaker 1: the dam and the other is the turbine. Correct. 58 00:03:43,596 --> 00:03:43,956 Speaker 2: Correct. 59 00:03:43,956 --> 00:03:46,676 Speaker 1: So let's start with the turbine problem. Just in the 60 00:03:46,716 --> 00:03:49,116 Speaker 1: case of the US, What are the main fish of 61 00:03:49,876 --> 00:03:53,676 Speaker 1: concern species of concern? What fish are getting chopped up 62 00:03:53,716 --> 00:03:54,516 Speaker 1: by turbines? 63 00:03:55,316 --> 00:03:59,756 Speaker 2: Well, there are many fish, of course. The species of 64 00:03:59,796 --> 00:04:02,956 Speaker 2: concern that raise to the kind of top of the 65 00:04:03,036 --> 00:04:08,916 Speaker 2: list from a human perspective at least are salmon because 66 00:04:08,916 --> 00:04:11,396 Speaker 2: sand and as a commercial fishery that has a lot 67 00:04:11,436 --> 00:04:16,316 Speaker 2: of value, and eel is a more recent species of concern. 68 00:04:16,956 --> 00:04:19,516 Speaker 2: Eel is less because it's a commercial fishery, but more 69 00:04:20,156 --> 00:04:23,036 Speaker 2: actually because eel are a critical part of the life 70 00:04:23,036 --> 00:04:26,356 Speaker 2: cycle for freshwater muscles. And one of the things that 71 00:04:26,396 --> 00:04:29,156 Speaker 2: we've really started to understand in the last decade or 72 00:04:29,196 --> 00:04:34,476 Speaker 2: so is that freshwater muscles are really critical to water quality, 73 00:04:34,756 --> 00:04:37,676 Speaker 2: and we as humans care about water quality a lot, 74 00:04:37,916 --> 00:04:39,756 Speaker 2: even if we might not care that much about freshwater 75 00:04:39,796 --> 00:04:41,036 Speaker 2: muscles or eel. 76 00:04:40,836 --> 00:04:43,156 Speaker 1: So just to be clear, like if you put a 77 00:04:43,156 --> 00:04:46,636 Speaker 1: turbine in a river and the eel get chopped up 78 00:04:46,676 --> 00:04:48,396 Speaker 1: in it, the water quality. 79 00:04:48,076 --> 00:04:50,236 Speaker 2: Gets worse, yes, bottom line, yep. 80 00:04:50,836 --> 00:04:55,236 Speaker 1: And I've heard of you know, ladders and things like 81 00:04:55,276 --> 00:05:00,156 Speaker 1: that for fish, like why didn't pre existing solutions work 82 00:05:00,276 --> 00:05:01,676 Speaker 1: very well? 83 00:05:01,916 --> 00:05:04,836 Speaker 2: So actually we have focused quite a bit on getting 84 00:05:04,836 --> 00:05:08,596 Speaker 2: fish upstream with ladders and have had you know, some 85 00:05:08,636 --> 00:05:11,796 Speaker 2: degree of success with that for certain species. Eel and 86 00:05:11,836 --> 00:05:15,236 Speaker 2: salmon actually are both able to navigate ladders of different 87 00:05:15,276 --> 00:05:20,436 Speaker 2: types upstream, eel in particular quite well. The thing that 88 00:05:20,476 --> 00:05:22,396 Speaker 2: we had focused less on is how do we get 89 00:05:22,436 --> 00:05:26,796 Speaker 2: fish back downstream safely? So actually building ways to get 90 00:05:26,836 --> 00:05:29,396 Speaker 2: fish to move upstream is in some ways maybe a 91 00:05:29,436 --> 00:05:33,916 Speaker 2: more accessible problem than how do you deal with getting 92 00:05:33,916 --> 00:05:38,076 Speaker 2: fish to move safely downstream? Where from a hydropower perspective, 93 00:05:38,116 --> 00:05:40,556 Speaker 2: you want most of that water moving through your turbine 94 00:05:40,596 --> 00:05:42,796 Speaker 2: because the amount of water going through your turbine is 95 00:05:42,836 --> 00:05:45,236 Speaker 2: directly relevantly on energy you create. 96 00:05:45,316 --> 00:05:47,996 Speaker 1: Right, So it's a difficult trade off. You could either 97 00:05:48,116 --> 00:05:50,316 Speaker 1: route the water around the turbine and then the fish 98 00:05:50,356 --> 00:05:52,756 Speaker 1: don't die, but then you don't get any power because 99 00:05:52,796 --> 00:05:54,036 Speaker 1: you rounted all the water around your. 100 00:05:53,996 --> 00:05:57,476 Speaker 2: Turb right, right, And so the mitigation, the interim mitigation 101 00:05:57,556 --> 00:06:00,316 Speaker 2: that folks have started to explore, is to put screens. 102 00:06:00,596 --> 00:06:03,116 Speaker 2: So not just so all hydropower plants have what are 103 00:06:03,116 --> 00:06:06,516 Speaker 2: called trash racks to keep like, you know, shopping carts 104 00:06:06,556 --> 00:06:09,796 Speaker 2: and logs and all sorts of things that rip from 105 00:06:09,796 --> 00:06:13,036 Speaker 2: going through the turbine, but those trash racks you know, 106 00:06:13,116 --> 00:06:15,836 Speaker 2: will have you know, an inch to four inch spacing, 107 00:06:15,956 --> 00:06:18,876 Speaker 2: so quite a few things fish, you know, can make 108 00:06:18,916 --> 00:06:21,996 Speaker 2: it through. So folks have looked at screens. But the 109 00:06:22,036 --> 00:06:25,316 Speaker 2: problem with screens is that the finer the screen, the 110 00:06:25,316 --> 00:06:27,316 Speaker 2: more likely you are to keep fish out. But the 111 00:06:27,356 --> 00:06:30,756 Speaker 2: finer the screen, the more efficiency loss you have across 112 00:06:30,796 --> 00:06:31,156 Speaker 2: the screen. 113 00:06:31,236 --> 00:06:37,196 Speaker 1: The screen it just gets covered and leaves Schmitz and whatever. Yeah, okay, 114 00:06:36,956 --> 00:06:41,036 Speaker 1: so your notion is like, let's let's fix the blade itself. 115 00:06:41,156 --> 00:06:43,356 Speaker 1: Can we make a blade that will generate power and 116 00:06:43,396 --> 00:06:48,796 Speaker 1: not kill fish exactly? Exactly? Seems seems hard, Like when 117 00:06:48,876 --> 00:06:52,436 Speaker 1: you're setting out to do this, what what are you 118 00:06:52,476 --> 00:06:53,036 Speaker 1: thinking about? 119 00:06:53,436 --> 00:06:57,116 Speaker 2: So conventional turbines particularly, you know, probably most folks are 120 00:06:57,116 --> 00:07:00,556 Speaker 2: familiar with, say a wind turbine. They are circular in nature, 121 00:07:00,796 --> 00:07:02,716 Speaker 2: and so what that means as they spin is the 122 00:07:02,756 --> 00:07:06,396 Speaker 2: tips are moving faster than the center of the blade. 123 00:07:06,396 --> 00:07:08,476 Speaker 2: If anybody's been on the merry ground, you know that. 124 00:07:08,796 --> 00:07:14,116 Speaker 2: So one thought we had was because speed is directly 125 00:07:14,156 --> 00:07:17,116 Speaker 2: proportional to the speed at which something hits you, is 126 00:07:17,796 --> 00:07:19,796 Speaker 2: going to have a relation to how hard or how 127 00:07:19,876 --> 00:07:20,476 Speaker 2: much it hurts. 128 00:07:20,636 --> 00:07:22,636 Speaker 1: Right right, if you're a fish, you're more likely to 129 00:07:22,716 --> 00:07:26,516 Speaker 1: die by a blade that's spinning really fast, correct exactly. 130 00:07:26,836 --> 00:07:31,156 Speaker 2: And so one way to change the ratio and have 131 00:07:31,236 --> 00:07:34,276 Speaker 2: a consistent speed across the whole length of the blade 132 00:07:34,676 --> 00:07:37,236 Speaker 2: is to instead of having blades move in a circle 133 00:07:37,716 --> 00:07:41,396 Speaker 2: around a central hub, to if you think about taking 134 00:07:42,836 --> 00:07:45,076 Speaker 2: the center hub and a turban and splitting it in 135 00:07:45,116 --> 00:07:48,396 Speaker 2: two and stretching it apart. It was a very different. 136 00:07:48,116 --> 00:07:50,036 Speaker 1: Design, sounds very complicated. 137 00:07:50,276 --> 00:07:53,236 Speaker 2: It was hard to picture, yes, And I think bottom line, 138 00:07:53,276 --> 00:07:55,196 Speaker 2: we realized after a lot of work, we didn't need 139 00:07:55,236 --> 00:07:59,116 Speaker 2: to do that. We could just make a better blade 140 00:07:59,116 --> 00:08:04,756 Speaker 2: shape on a conventional turbine design. But that took quite 141 00:08:04,836 --> 00:08:07,796 Speaker 2: a bit of work to get to that point. 142 00:08:08,436 --> 00:08:09,556 Speaker 1: How did you figure that out? 143 00:08:10,036 --> 00:08:12,076 Speaker 2: Well, the simple version is a lot of trial and 144 00:08:12,196 --> 00:08:15,916 Speaker 2: error and a lot of you know, experimentation. Where we 145 00:08:16,076 --> 00:08:18,036 Speaker 2: ended up is actually I think a very simple and 146 00:08:18,076 --> 00:08:23,116 Speaker 2: elegant solution, which is which which belies the amount of 147 00:08:23,156 --> 00:08:25,036 Speaker 2: work that went into it. 148 00:08:25,116 --> 00:08:28,156 Speaker 1: Often in the case like it's easy once you know 149 00:08:28,196 --> 00:08:29,996 Speaker 1: how to do it right, figuring out how to do 150 00:08:30,036 --> 00:08:30,916 Speaker 1: it is hard. 151 00:08:30,836 --> 00:08:35,996 Speaker 2: Right and and the simple elegant solution basically it comes 152 00:08:36,036 --> 00:08:38,156 Speaker 2: down to two things. One is that the leading edge 153 00:08:38,156 --> 00:08:43,276 Speaker 2: of the blade itself is fairly thick relative to the 154 00:08:43,796 --> 00:08:46,876 Speaker 2: size of fish interacting with it, and so that is 155 00:08:46,956 --> 00:08:48,796 Speaker 2: kind of intuitive. If you have a you have a 156 00:08:48,836 --> 00:08:51,356 Speaker 2: blunt edge moving through the water as opposed to a 157 00:08:51,396 --> 00:08:53,476 Speaker 2: knife edge moving through the water. The blunt edge is 158 00:08:53,516 --> 00:08:57,356 Speaker 2: going to be better for interacting with like things get deflected, 159 00:08:57,396 --> 00:08:59,596 Speaker 2: fish get deflected, or if. 160 00:08:59,516 --> 00:09:01,476 Speaker 1: You think of it from the fish's point of view, 161 00:09:01,516 --> 00:09:04,996 Speaker 1: like if you're swimming into a knife blade, that's going 162 00:09:05,076 --> 00:09:06,636 Speaker 1: to mess you up more than if you're swimming into 163 00:09:06,716 --> 00:09:08,636 Speaker 1: like a little wall right. 164 00:09:08,556 --> 00:09:15,516 Speaker 2: Right, like a rounded a rounded wall or rounded rounded rounded. 165 00:09:17,316 --> 00:09:20,756 Speaker 2: So that's one part and then the other part is 166 00:09:21,636 --> 00:09:23,956 Speaker 2: and actually the physics around it are fairly interesting because 167 00:09:23,996 --> 00:09:28,076 Speaker 2: that rounded edge creates a almost like an air bag, 168 00:09:28,156 --> 00:09:30,116 Speaker 2: like a you can think of it like as a 169 00:09:30,116 --> 00:09:34,196 Speaker 2: as a field like water water bag, and it basically 170 00:09:34,236 --> 00:09:36,196 Speaker 2: helps deflect stuff around the blade. 171 00:09:36,236 --> 00:09:39,356 Speaker 1: So that part's good stuff, including fish. 172 00:09:39,116 --> 00:09:42,276 Speaker 2: Stuff including fish. And then the other part was to 173 00:09:42,316 --> 00:09:44,596 Speaker 2: solve that problem of the fact that the tips move 174 00:09:44,676 --> 00:09:47,876 Speaker 2: faster than the hub than the center, and to do 175 00:09:47,996 --> 00:09:53,156 Speaker 2: that we then introduced a swoop forward of the blade. 176 00:09:53,316 --> 00:09:56,436 Speaker 2: And that is again you know a little bit of 177 00:09:56,436 --> 00:09:59,796 Speaker 2: physics is what that. But the way to intutorly understand 178 00:09:59,836 --> 00:10:02,276 Speaker 2: it is that if you're if you're swimming through water 179 00:10:02,316 --> 00:10:04,436 Speaker 2: and you get struck with a glancing blow as opposed 180 00:10:04,476 --> 00:10:07,556 Speaker 2: to a direct blow, the glancing blow hurts a lot less. 181 00:10:07,956 --> 00:10:11,276 Speaker 1: Yeah, I want a glancing blo those are my choice, right, And. 182 00:10:11,196 --> 00:10:15,036 Speaker 2: So by swooping the blade forward, it simply it basically 183 00:10:15,036 --> 00:10:17,596 Speaker 2: means that you don't have direct strikes. You have glanc 184 00:10:17,636 --> 00:10:20,796 Speaker 2: Dange strikes, and the energy of that impact is now 185 00:10:20,916 --> 00:10:25,996 Speaker 2: dramatically less and that leads directly to survival. So all 186 00:10:25,996 --> 00:10:27,916 Speaker 2: of this is around the leading edge of the blade, 187 00:10:27,956 --> 00:10:30,996 Speaker 2: and that's all tied up with fish safety. The rest 188 00:10:31,036 --> 00:10:33,996 Speaker 2: of the blade shape is all about performance again because 189 00:10:34,156 --> 00:10:37,396 Speaker 2: we have to have high performance, hig efficiency machines. And 190 00:10:37,476 --> 00:10:41,756 Speaker 2: so the twin engineering challenges were this then balancing the 191 00:10:41,916 --> 00:10:44,116 Speaker 2: shape on the leading edge with the shape of the 192 00:10:44,116 --> 00:10:46,356 Speaker 2: rest of the blade. So we have a highly fished 193 00:10:46,356 --> 00:10:50,916 Speaker 2: safe leading edge with a high performing rest of the blade. Right. 194 00:10:51,036 --> 00:10:53,996 Speaker 1: So now you've figured out how to not kill fish, 195 00:10:54,156 --> 00:10:56,356 Speaker 1: but you have to make sure you can still generate power. 196 00:10:56,396 --> 00:10:57,276 Speaker 1: It still has to work. 197 00:10:57,396 --> 00:10:58,956 Speaker 2: It still has to work, still has to work at 198 00:10:58,996 --> 00:11:02,356 Speaker 2: you know, ninety ninety three percent efficiency. That's these are 199 00:11:02,476 --> 00:11:06,876 Speaker 2: very very high performance machines. And then I think the 200 00:11:06,956 --> 00:11:12,556 Speaker 2: other additional construt that we face is a design approach 201 00:11:12,836 --> 00:11:16,996 Speaker 2: that can design blades that are able to go into 202 00:11:17,116 --> 00:11:19,716 Speaker 2: all of the existing hydropower plants that we have today. 203 00:11:20,076 --> 00:11:22,596 Speaker 2: When we're talking about hydro, we're talking about dealing with 204 00:11:22,636 --> 00:11:26,516 Speaker 2: a large, existing installed base that we want to upgrade 205 00:11:26,956 --> 00:11:29,036 Speaker 2: to be fish safe, which means we need to go 206 00:11:29,076 --> 00:11:31,996 Speaker 2: into the existing concrete and all the other stuff that's there. 207 00:11:32,156 --> 00:11:35,076 Speaker 1: So this is essentially a replacement part building a whole 208 00:11:35,116 --> 00:11:38,036 Speaker 1: new system. We're building a replacement part. So just so 209 00:11:38,236 --> 00:11:39,676 Speaker 1: you figure out how to build this thing, and just 210 00:11:39,716 --> 00:11:42,116 Speaker 1: tell me, what does it look like to somebody who 211 00:11:42,116 --> 00:11:44,236 Speaker 1: doesn't know about all the swooping and the wide blade. 212 00:11:44,276 --> 00:11:45,596 Speaker 1: Just if you look at it, what does it look like? 213 00:11:45,916 --> 00:11:49,116 Speaker 2: It looks like a propeller, but with a very punky, 214 00:11:49,476 --> 00:11:51,316 Speaker 2: you know, big thick leading edge. 215 00:11:51,756 --> 00:11:53,756 Speaker 1: Uh huh, Yeah, I mean I looked at it and 216 00:11:53,796 --> 00:11:56,076 Speaker 1: I thought like, oh, it just looks like a jet 217 00:11:56,116 --> 00:12:00,676 Speaker 1: engine kind of right. There's like a around there's like 218 00:12:00,716 --> 00:12:05,756 Speaker 1: a metal cylinder with the blade inside of it. Correct, Like, yeah, 219 00:12:05,756 --> 00:12:07,676 Speaker 1: you wouldn't know. You wouldn't know how hard it was 220 00:12:07,796 --> 00:12:09,796 Speaker 1: or that it doesn't kill fish if you looked at it. 221 00:12:10,076 --> 00:12:10,676 Speaker 2: That's correct. 222 00:12:11,476 --> 00:12:17,076 Speaker 1: There is there a moment when you when you test it, 223 00:12:17,116 --> 00:12:19,596 Speaker 1: is there like, okay, we made this thing, let's see 224 00:12:19,596 --> 00:12:21,276 Speaker 1: if it kills fish. Like, how do you figure out 225 00:12:21,316 --> 00:12:22,116 Speaker 1: if it kills fish. 226 00:12:22,196 --> 00:12:25,276 Speaker 2: We have a water tank and a pump and we 227 00:12:25,316 --> 00:12:28,596 Speaker 2: recirculate water through a set of pipes through a turbine. 228 00:12:29,036 --> 00:12:31,476 Speaker 2: That turbine has a transparent housing around it, so we 229 00:12:31,516 --> 00:12:33,396 Speaker 2: can take high speed video so we can see the 230 00:12:33,436 --> 00:12:34,476 Speaker 2: fish as they go through. 231 00:12:34,676 --> 00:12:36,796 Speaker 1: Cool see what they do. You're just dump fishing and 232 00:12:36,876 --> 00:12:38,236 Speaker 1: say good luck fish. 233 00:12:37,996 --> 00:12:42,716 Speaker 2: Basically, yeah, and then we I mean, this is all 234 00:12:42,796 --> 00:12:45,276 Speaker 2: very scientific, right, So we tag each fish that goes 235 00:12:45,316 --> 00:12:47,436 Speaker 2: through the turbine, we capture it at the end, we 236 00:12:47,556 --> 00:12:50,116 Speaker 2: have we inspect the fish before, we inspect the fish 237 00:12:50,156 --> 00:12:52,836 Speaker 2: after we hold the fish for forty eight hours after 238 00:12:52,836 --> 00:12:55,836 Speaker 2: they go through the turbine. We have a control population. 239 00:12:56,156 --> 00:13:01,036 Speaker 1: So traditional turbines you said kill about twenty percent of 240 00:13:01,076 --> 00:13:05,476 Speaker 1: the fish that pass through them. What percent of the 241 00:13:05,516 --> 00:13:08,796 Speaker 1: fish that passed through your turbine are killed by the. 242 00:13:08,756 --> 00:13:11,556 Speaker 2: Turbine less than two percent. So we have done tests 243 00:13:11,596 --> 00:13:14,956 Speaker 2: that have one hundred percent survival, so zero fish die. 244 00:13:15,116 --> 00:13:17,876 Speaker 1: So you got your turbine. It doesn't kill fish. And 245 00:13:18,036 --> 00:13:20,316 Speaker 1: by the way, how does it compare in terms of efficiency? 246 00:13:20,356 --> 00:13:24,636 Speaker 1: How is it at generating power compared to comparable turbines. 247 00:13:24,476 --> 00:13:27,556 Speaker 2: Similar So it's not the case where we can always 248 00:13:27,556 --> 00:13:30,356 Speaker 2: say that there is no trade off. Some of the 249 00:13:30,356 --> 00:13:33,756 Speaker 2: most efficient hydroturbines out there, you know, approach efficiencies of 250 00:13:33,836 --> 00:13:37,396 Speaker 2: ninety four ninety five percent. I think right now we 251 00:13:37,436 --> 00:13:40,476 Speaker 2: top out at around ninety three percent. So for the 252 00:13:40,476 --> 00:13:42,476 Speaker 2: most efficient, there will be some turbines that are a 253 00:13:42,476 --> 00:13:45,996 Speaker 2: little bit more efficient. However, when you think about prioritization 254 00:13:46,116 --> 00:13:49,156 Speaker 2: of fish passage, and you think about a very efficient turbine, 255 00:13:49,196 --> 00:13:50,836 Speaker 2: but now you need to put a screen in front 256 00:13:50,836 --> 00:13:55,436 Speaker 2: of it, you end up with net net delivered cost 257 00:13:55,476 --> 00:14:00,516 Speaker 2: of energy relative to fish safe performance is definitely better 258 00:14:00,676 --> 00:14:02,756 Speaker 2: when you can pass fish safely through a turbine, even 259 00:14:02,756 --> 00:14:05,556 Speaker 2: if it's ninety three percent instead of ninety four percent efficient. 260 00:14:05,636 --> 00:14:08,556 Speaker 1: So you got your turbine. It works. Where are your 261 00:14:08,596 --> 00:14:11,116 Speaker 1: turbines in the world today generating energy? 262 00:14:11,996 --> 00:14:16,116 Speaker 2: Today? We have three projects installed, one in Oregon, one 263 00:14:16,156 --> 00:14:17,796 Speaker 2: in Maine, and one in Austria. 264 00:14:18,436 --> 00:14:23,196 Speaker 1: And are these like pilots? Are these like big utility scale? 265 00:14:23,396 --> 00:14:25,916 Speaker 1: Are they like? What is the nature of these three? 266 00:14:26,036 --> 00:14:29,556 Speaker 2: They're commercial installations. They are generating electricity connected to the grid. 267 00:14:30,596 --> 00:14:37,916 Speaker 2: We're looking at things in Virginia, in Massachusetts, Connecticut, Switzerland, France, 268 00:14:39,876 --> 00:14:42,236 Speaker 2: and now most recently up in Ontario, and I should 269 00:14:42,236 --> 00:14:44,476 Speaker 2: be very clear, these are all deals that we're working 270 00:14:44,476 --> 00:14:46,196 Speaker 2: on that are not yet closed with a couple of 271 00:14:46,196 --> 00:14:49,516 Speaker 2: different utilities. So I think what we are I think 272 00:14:49,596 --> 00:14:52,956 Speaker 2: really at an interesting tipping point from a commercial perspective, 273 00:14:53,476 --> 00:14:56,596 Speaker 2: where the industry is finally realizing that there is a 274 00:14:56,636 --> 00:14:59,956 Speaker 2: way to upgrade all of these old assets, maintain or 275 00:14:59,956 --> 00:15:02,636 Speaker 2: actually improve in some cases the power output simply because 276 00:15:02,636 --> 00:15:05,196 Speaker 2: we're replacing really old turbans with new turbans, and the 277 00:15:05,236 --> 00:15:11,876 Speaker 2: new turbines are higher performance and do so without killing fish. 278 00:15:11,956 --> 00:15:14,996 Speaker 2: And at the end of the day, our value proposition 279 00:15:15,036 --> 00:15:18,196 Speaker 2: simply is, if you're going to spend billions of dollars 280 00:15:18,796 --> 00:15:21,836 Speaker 2: on equipment that's going to run for forty or fifty years, 281 00:15:22,276 --> 00:15:26,236 Speaker 2: and you could put in a conventional machine which will 282 00:15:26,316 --> 00:15:29,356 Speaker 2: kill fish, or a machine that is not going to 283 00:15:29,436 --> 00:15:33,116 Speaker 2: kill fish, why would you not choose the machine that 284 00:15:33,196 --> 00:15:35,356 Speaker 2: is not going to kill fish. 285 00:15:36,236 --> 00:15:42,316 Speaker 1: Are there regulatory requirements that make it that sort of 286 00:15:42,356 --> 00:15:45,436 Speaker 1: push utilities towards choosing your turbine? I mean, is it 287 00:15:45,476 --> 00:15:47,156 Speaker 1: like if they don't choose your turbine, then they have 288 00:15:47,196 --> 00:15:49,076 Speaker 1: to put in a really fine screen and it's going 289 00:15:49,116 --> 00:15:51,956 Speaker 1: to be worse for them anyways, that's correct. 290 00:15:52,036 --> 00:15:55,796 Speaker 2: Yes, I think where we're seeing the most immediate uptake 291 00:15:55,916 --> 00:15:59,556 Speaker 2: is places where there are regulations for safe passage which 292 00:15:59,836 --> 00:16:02,596 Speaker 2: require either of putting in a screen with a bypass, 293 00:16:02,796 --> 00:16:05,476 Speaker 2: so you generally are reducing energy because you're putting more 294 00:16:05,516 --> 00:16:07,796 Speaker 2: water around the turbine instead of through in addition to 295 00:16:07,836 --> 00:16:10,636 Speaker 2: the screen, which adds to costs, or in some cases 296 00:16:10,676 --> 00:16:13,796 Speaker 2: you're having to shut down at night for three or 297 00:16:13,836 --> 00:16:15,556 Speaker 2: four or five months out of the year while fish 298 00:16:15,556 --> 00:16:17,916 Speaker 2: are moving. Things like that. 299 00:16:21,236 --> 00:16:23,476 Speaker 1: We'll be back in a minute to discuss gia's long 300 00:16:23,556 --> 00:16:27,916 Speaker 1: term problem. Once you fix turbines, what about dams? How 301 00:16:27,916 --> 00:16:30,036 Speaker 1: do you put a dam in a river without messing 302 00:16:30,156 --> 00:16:33,476 Speaker 1: up the ecosystem? Part of the answer, It turns out 303 00:16:34,316 --> 00:16:46,596 Speaker 1: you ask yourself what would beavers do. There's another problem 304 00:16:46,636 --> 00:16:51,356 Speaker 1: with hydro power, right, which is the dams themselves mess 305 00:16:51,436 --> 00:16:56,196 Speaker 1: up river ecosystems, and a turbine that doesn't kill fish 306 00:16:56,756 --> 00:16:59,596 Speaker 1: doesn't solve that, right, or it doesn't solve it entirely. 307 00:17:01,716 --> 00:17:02,916 Speaker 1: What are you going to do about that one? 308 00:17:03,396 --> 00:17:08,476 Speaker 2: Yeah, well, I think the answer is multi layered, and 309 00:17:09,556 --> 00:17:12,116 Speaker 2: in general our view is that there are certain existing 310 00:17:12,196 --> 00:17:15,476 Speaker 2: dams today that make sense to be removed. That's a 311 00:17:15,516 --> 00:17:19,036 Speaker 2: position that and in general I would say that you'll 312 00:17:19,076 --> 00:17:22,556 Speaker 2: find that to be a position across the industry. They're 313 00:17:22,556 --> 00:17:25,796 Speaker 2: just are in some cases stuff that we built, maybe 314 00:17:25,796 --> 00:17:28,356 Speaker 2: even one hundred years ago that just don't make sense 315 00:17:28,396 --> 00:17:30,636 Speaker 2: to keep in in today. And they should be right. 316 00:17:31,196 --> 00:17:33,876 Speaker 1: And it's a basic cost benefit, like it's a high 317 00:17:33,956 --> 00:17:36,636 Speaker 1: ecological cost, it's not generating that much power, I mean, 318 00:17:36,636 --> 00:17:37,956 Speaker 1: it's not the basic calculus. 319 00:17:38,116 --> 00:17:40,996 Speaker 2: Or it's also just a high operations cost. So it's 320 00:17:41,036 --> 00:17:45,236 Speaker 2: a combination of commercial and environmental factors driving the decision making. 321 00:17:45,756 --> 00:17:49,116 Speaker 2: So the next layer after dam removal is what we 322 00:17:49,156 --> 00:17:52,996 Speaker 2: think of as reconfiguration. So if I have an existing project, 323 00:17:53,036 --> 00:17:56,036 Speaker 2: it makes sense to stay in economically it's a good, 324 00:17:56,236 --> 00:17:59,276 Speaker 2: good asset. But maybe there are some things that I 325 00:17:59,316 --> 00:18:01,476 Speaker 2: can do in addition to putting in fish safe turbines 326 00:18:01,556 --> 00:18:04,916 Speaker 2: that will improve the upstream passage by having a better 327 00:18:04,956 --> 00:18:09,356 Speaker 2: bypass or a more naturalistic upstream passage zone for example. 328 00:18:10,236 --> 00:18:12,636 Speaker 1: Those are reasonable, But you have this big dream. Tell 329 00:18:12,636 --> 00:18:13,116 Speaker 1: me about that. 330 00:18:13,236 --> 00:18:15,996 Speaker 2: Yeah, So the big dream is what we call restoration hydro, 331 00:18:16,436 --> 00:18:20,476 Speaker 2: which is to go full stop in taking the lessons 332 00:18:20,556 --> 00:18:25,836 Speaker 2: learned from river restoration over the last couple decades take 333 00:18:25,876 --> 00:18:30,636 Speaker 2: inspiration from nature's engineers, which are beavers, which do build dams. 334 00:18:31,196 --> 00:18:33,916 Speaker 2: And what's fascinating when you look at beavers is that 335 00:18:33,956 --> 00:18:37,356 Speaker 2: you can find beaver dams that are very large, hundreds 336 00:18:37,396 --> 00:18:41,356 Speaker 2: of feet long, fifteen feet high. You can find beaver 337 00:18:41,436 --> 00:18:44,396 Speaker 2: dams that have been around for a century, can be 338 00:18:44,516 --> 00:18:48,236 Speaker 2: very persistent. And what's interesting when you look at those 339 00:18:48,276 --> 00:18:51,516 Speaker 2: structures is they actually have very positive impacts on the 340 00:18:51,636 --> 00:18:56,196 Speaker 2: river ecosystem with respect to groundwater recharge. They slow water 341 00:18:56,276 --> 00:18:58,556 Speaker 2: runoff down that helps get war water into the ground, 342 00:18:58,876 --> 00:19:04,396 Speaker 2: that helps to benefit the water table. They create more habitat, 343 00:19:04,436 --> 00:19:07,516 Speaker 2: more diverse habitat around in that particular part of the 344 00:19:07,556 --> 00:19:10,596 Speaker 2: river reach, which is beneficial for FIT. So the big 345 00:19:10,596 --> 00:19:14,196 Speaker 2: picture dream is to is to take is basically a 346 00:19:14,276 --> 00:19:18,516 Speaker 2: nature based approach to thinking about rethinking hydro, certainly for 347 00:19:18,596 --> 00:19:22,756 Speaker 2: new build projects, but potentially also for reconfiguring more dramatically 348 00:19:22,956 --> 00:19:23,916 Speaker 2: existing projects. 349 00:19:24,236 --> 00:19:27,716 Speaker 1: I get that beavers are cool, like beavers are indeed amazing, 350 00:19:28,356 --> 00:19:30,396 Speaker 1: but I don't think I get exactly. I mean, are 351 00:19:30,396 --> 00:19:35,716 Speaker 1: you just saying we should build dams like beavers? Like 352 00:19:35,756 --> 00:19:38,396 Speaker 1: I don't really understand practically. 353 00:19:37,916 --> 00:19:41,556 Speaker 2: Building dams that fit what you mean. Yeah, The concept 354 00:19:41,596 --> 00:19:45,396 Speaker 2: behind restoration hydro is to realize that what we see 355 00:19:45,436 --> 00:19:48,236 Speaker 2: in rivers today is not the way rivers actually were 356 00:19:48,436 --> 00:19:50,556 Speaker 2: in their natural state. The rivers in their natural state 357 00:19:50,596 --> 00:19:54,596 Speaker 2: two hundred years ago in North America were full of logjams, 358 00:19:54,596 --> 00:19:59,836 Speaker 2: woody debris, beaver dams, all sorts of barriers to flow. 359 00:20:00,236 --> 00:20:05,036 Speaker 2: Those barriers helped mitigate floods because you si water run 360 00:20:05,036 --> 00:20:07,796 Speaker 2: off down across the landscape. They helped drive groundwater recharge. 361 00:20:07,836 --> 00:20:08,876 Speaker 2: They have a whole bunch of. 362 00:20:08,836 --> 00:20:11,956 Speaker 1: Ben that's cool. So like when we picture a river 363 00:20:11,996 --> 00:20:15,236 Speaker 1: and we just picture it free flowing, that's actually not 364 00:20:15,396 --> 00:20:18,076 Speaker 1: natural either. That is the product of some amount of 365 00:20:18,116 --> 00:20:18,996 Speaker 1: human intervention. 366 00:20:19,116 --> 00:20:22,316 Speaker 2: A huge amount of reream is intervention for navigation for 367 00:20:22,356 --> 00:20:24,236 Speaker 2: all sorts of reasons. Right, we want to be able 368 00:20:24,276 --> 00:20:25,836 Speaker 2: to drive a boat straight through the river. 369 00:20:27,116 --> 00:20:31,196 Speaker 1: So the dream is is you sort of get a 370 00:20:31,236 --> 00:20:34,516 Speaker 1: sense of what the natural dams might have been and 371 00:20:34,596 --> 00:20:37,796 Speaker 1: build those and generate power from them. Like that's the dream. 372 00:20:37,916 --> 00:20:40,556 Speaker 2: That's the dream, And the reality, of course, is that 373 00:20:40,876 --> 00:20:42,876 Speaker 2: it's going to be one step back from that, because 374 00:20:43,716 --> 00:20:46,676 Speaker 2: you know, we live in an existing built infrastructure with 375 00:20:46,716 --> 00:20:49,316 Speaker 2: a lot of stuff that we have to adapt. But 376 00:20:49,436 --> 00:20:54,476 Speaker 2: I think that that is a pathway that we feel 377 00:20:54,476 --> 00:20:56,836 Speaker 2: pretty strongly we're going to have to go down anyway 378 00:20:56,916 --> 00:21:00,036 Speaker 2: in the context of climate change, because if we look 379 00:21:00,076 --> 00:21:03,716 Speaker 2: at the increase in extreme weather events and precipitation events, 380 00:21:03,716 --> 00:21:07,716 Speaker 2: both extreme floods and extreme droughts, the common problem is 381 00:21:07,716 --> 00:21:10,716 Speaker 2: we're getting too much or not enough water in the 382 00:21:10,956 --> 00:21:11,356 Speaker 2: you know. 383 00:21:11,516 --> 00:21:13,196 Speaker 1: At the wrong given moment, right. 384 00:21:13,756 --> 00:21:17,796 Speaker 2: And so what dams do, whether they're man made or natural, 385 00:21:18,516 --> 00:21:23,716 Speaker 2: is help to spread water out across time and across space, 386 00:21:25,036 --> 00:21:28,516 Speaker 2: and that is going to be a critical part of 387 00:21:28,556 --> 00:21:32,036 Speaker 2: adapting to climate change, which we are going to have 388 00:21:32,156 --> 00:21:34,836 Speaker 2: to do. We have a certain amount of climate change 389 00:21:34,916 --> 00:21:38,716 Speaker 2: embedded in our atmosphere today, we are seeing it already, 390 00:21:39,276 --> 00:21:42,876 Speaker 2: and so the view for us around restoration hydros, it's 391 00:21:42,876 --> 00:21:46,036 Speaker 2: a way to start to blend this future of how 392 00:21:46,076 --> 00:21:48,276 Speaker 2: do we deal with climate change from a water resource 393 00:21:48,276 --> 00:21:51,476 Speaker 2: management perspective with also adding to the renewable energy supply. 394 00:21:51,796 --> 00:21:54,516 Speaker 1: It's cool, It's a cool it's a cool way of 395 00:21:54,556 --> 00:21:56,956 Speaker 1: thinking about the world that I had not thought of before. 396 00:21:56,996 --> 00:22:00,516 Speaker 1: So I appreciate it's fun to have a new way 397 00:22:00,516 --> 00:22:01,276 Speaker 1: of thinking about the world. 398 00:22:01,476 --> 00:22:03,396 Speaker 2: Yeah, I mean, I think that this is critical for 399 00:22:03,476 --> 00:22:07,596 Speaker 2: us in general, for everyone who's working to tackle the 400 00:22:07,716 --> 00:22:12,436 Speaker 2: clean energy transition, because if you think about what we're doing, 401 00:22:12,516 --> 00:22:20,156 Speaker 2: we are basically replacing fossil fuel resource extraction with something else, 402 00:22:20,716 --> 00:22:23,796 Speaker 2: and that something else is not necessarily a world that 403 00:22:24,076 --> 00:22:26,836 Speaker 2: is biodiverse. It's a world like I can fully imagine 404 00:22:26,836 --> 00:22:29,356 Speaker 2: a world where we have made the clean energy transition. 405 00:22:29,636 --> 00:22:34,036 Speaker 2: We are using when sun and water and geothermal energy 406 00:22:34,076 --> 00:22:36,476 Speaker 2: to power all of our energy needs, but in the 407 00:22:36,476 --> 00:22:41,156 Speaker 2: process of doing that, we have mined the earth massively. 408 00:22:41,276 --> 00:22:45,836 Speaker 2: We have huge industrial scale build out of everything, and 409 00:22:46,996 --> 00:22:50,836 Speaker 2: that's a world that is not necessarily very biodiverse, but 410 00:22:51,196 --> 00:22:54,836 Speaker 2: is powered by clean energy. And so I think that 411 00:22:55,676 --> 00:22:57,996 Speaker 2: the one of the other reasons why I find hydro 412 00:22:58,076 --> 00:23:02,196 Speaker 2: interesting is because hydro has one hundred years of history 413 00:23:02,956 --> 00:23:05,836 Speaker 2: dealing with and thinking about and having lessons learned of 414 00:23:05,876 --> 00:23:08,916 Speaker 2: how how can we we can do renewable energy one 415 00:23:08,956 --> 00:23:12,596 Speaker 2: way that has a big negative environmental impact, or we 416 00:23:12,676 --> 00:23:19,396 Speaker 2: can embed criteria that prioritizes biodiversity and environmental criteria. And 417 00:23:19,436 --> 00:23:21,236 Speaker 2: we need to think about that not just for hydro, 418 00:23:21,356 --> 00:23:25,356 Speaker 2: but for batteries, for solar, for wind, et cetera. Across 419 00:23:25,356 --> 00:23:25,716 Speaker 2: the board. 420 00:23:28,236 --> 00:23:30,436 Speaker 1: We'll be back in a minute with the lightning round 421 00:23:41,236 --> 00:23:43,476 Speaker 1: for almost done, but first we have to do a 422 00:23:43,556 --> 00:23:46,796 Speaker 1: lightning round, which is just a lot of questions somewhat 423 00:23:46,796 --> 00:23:49,436 Speaker 1: more random than the other questions I've asked you so far. 424 00:23:50,196 --> 00:23:53,436 Speaker 1: For example, what's one thing you missed about Texas where 425 00:23:53,476 --> 00:23:54,036 Speaker 1: you grew up. 426 00:23:56,196 --> 00:23:58,396 Speaker 2: The farm, being on a farm? 427 00:23:58,476 --> 00:24:01,836 Speaker 1: Is it right that you lived in a cabin that 428 00:24:01,876 --> 00:24:04,596 Speaker 1: your dad built like I sort of caught glimpses of that, 429 00:24:04,636 --> 00:24:06,636 Speaker 1: but what's the true story of that? 430 00:24:06,636 --> 00:24:10,476 Speaker 2: That is the truth. He drove to our Arkansas, brought 431 00:24:10,516 --> 00:24:14,716 Speaker 2: back logs and built the house in which I grew 432 00:24:14,836 --> 00:24:17,756 Speaker 2: up with the help of some local high school students, 433 00:24:17,956 --> 00:24:23,076 Speaker 2: and so that is actually true. 434 00:24:23,116 --> 00:24:29,916 Speaker 1: Where are the tacos better Texas or California, Baja Mexico. Well, sure, 435 00:24:31,236 --> 00:24:33,196 Speaker 1: literally where fish tacos were invented. 436 00:24:35,556 --> 00:24:38,156 Speaker 2: I think both Sexes and California are fine. I've had, 437 00:24:38,236 --> 00:24:41,996 Speaker 2: I've had have equally great tacos in both both places. 438 00:24:42,236 --> 00:24:44,276 Speaker 1: What's one thing you learned from setting up the carbon 439 00:24:44,316 --> 00:24:50,436 Speaker 1: emissions trading tests at Credit SUEEE early in your career that. 440 00:24:52,916 --> 00:24:57,596 Speaker 2: It is possible to move policy in a direction that 441 00:24:57,716 --> 00:25:04,156 Speaker 2: supports environmental outcomes and aligns with the general like capitalist framework, 442 00:25:05,396 --> 00:25:07,196 Speaker 2: so it is possible to do that. It takes a 443 00:25:07,236 --> 00:25:08,316 Speaker 2: lot of thought, effort and care. 444 00:25:09,156 --> 00:25:15,036 Speaker 1: What's your favorite river, Oh, the McCloud, tell me about 445 00:25:15,036 --> 00:25:15,556 Speaker 1: the McLoud. 446 00:25:16,036 --> 00:25:20,276 Speaker 2: It is an amazing cold, like super cold water river 447 00:25:21,796 --> 00:25:27,436 Speaker 2: flows into Lake Shasta, and so unfortunately upstream migration is 448 00:25:27,476 --> 00:25:31,916 Speaker 2: blocked at Lake Shasta, and we're there. We go there 449 00:25:31,956 --> 00:25:34,476 Speaker 2: once a year, generally in the summers. It's a great 450 00:25:34,516 --> 00:25:39,836 Speaker 2: fishing trout fishing stream. It's just incredibly pristine, beautiful, just 451 00:25:39,956 --> 00:25:41,556 Speaker 2: a beautiful place. 452 00:25:44,676 --> 00:25:48,276 Speaker 1: Gia Schneider is the co founder and CEO of Nattel Energy. 453 00:25:49,756 --> 00:25:53,996 Speaker 1: Today's show was produced by Edith Russolo and Gabriel Hunter Chang. 454 00:25:54,516 --> 00:25:58,396 Speaker 1: It was edited by Karen Chakerjie and engineered by Sarah Bruger. 455 00:25:58,876 --> 00:26:02,556 Speaker 1: You can email us at problem at Pushkin dot FM. 456 00:26:02,836 --> 00:26:05,396 Speaker 1: I'm Jacob Goldstein and we'll be back next week with 457 00:26:05,476 --> 00:26:14,436 Speaker 1: another episode of What's Your Problem.