Factorio nuclear reactor setup

I did a similar setup (posted in another nuclear thread) where I used 4 chests with a token for a multi reactor setup. The 4 chest signal 4 states: 1) steam is low. 2) all reactors have at least one fuel ready. 3) insert fuel (kind of a dummy state but 4 chests form a circle) 4) spend fuel removed from all reactors.

How to set up your Kovarex & Nuclear power without circuits!Ratios in this videoSteam Power - 1 Pump - 20 Boilers - 40 Steam TurbinesSolar Power - 21 Accumul...The heat exchanger exchanges heat between a heat connection and water to produce steam . Heat exchangers produce ~103 steam with a temperature of 500°C every second. Heat exchangers will not produce steam until they reach 500°C. The steam produced is exactly 500°C hot, even if the exchanger is hotter. Heat exchangers have a heat capacity of ...If a reactor is hitting 1000C that means it is wasting fuel, not that it's working properly. That's the maximum temperature for the reactor, so once it heats up that much any fuel it's still using is doing nothing. Heat exchangers need to be above 500C to work. As long as all of the heat exchangers are getting to 500 the reactor is working ...My favorite game of all time has been officially released! Let's play some Factorio! This series is geared towards newer players, and I am playing with def...Here are my nuclear designs for 4 and 8 reactors. The designs respect ratio and most important thing, are symetrical! :p. (I have no design for 6 because my need of power scaled up too fast^^) 4 reactors (48 heat exchangers, 84 turbines, 6 pumps) 4 cores blueprint. 8 reactors (112 heat exchangers, 192 turbines, 10 pumps)While its uses a lot more heatpipes and can handle only 477.24MW, but bit more compact. Its only 36 x 58/60, which is 228/221kW/tile compared to 217kW/tile of your design. It's also buildable from outside with included roboport and can be tiled. This is a compact 46x48 and cheap to make 2x2 Nuclear Reactor. 480W constant/ 489W peak.

4 reactors nuclear plant without logistic chests. by fly » Wed Jul 19, 2017 7:14 pm. Just another 4 reactors setup. This is tradeoff between compactness, aesthetics (or symmetry, if you will ) and Logistic network embargo. It's 4 reactors - 48 heat exchangers - 84 steam turbines - 48 storage tanks - 5 offshore pumps (not visible on screenshot).Sutremaine. • 3 mo. ago. In the map view, turn on the 'power connections' option and zoom into the level before you get vision around your character. Check that the reactor area is connected outside itself, and follow that connection until you hit a production area or the main base or whatever big power consumer is closest.Hello everyone! First time poster here. Was having some occasional brownouts here and there with my 1x1 nuclear setup. Finally decided to take some…Nice looking 16 Reactors Setup. It can work at 2.5 GW for nearly entire hour then it drops at 2.4-2.3 GW (Game can't decide is it 2,4 either 2.3 GW). It took me 6 hours o_0. Entire powerplant. Of course if you want it to look like it /\ you must do it manually. I didnt use any circuts (Becasue I can't :P) so fell free to upgrade this blueprint ;)Don't worry if any of the reactors start flashing with a 'No fuel' icon. This is because there is enough stored steam for the reactors to be idle. There are programmable speakers for 3 events. First when the amount of nuclear fuel in the requester chests falls below 100 cells. You will receive this alert when you first place the build.

Nuclear Power by Nilaus - FACTORIO MASTER CLASS. View Copy. 52.19 KB 1.1.34 24988. Book Contents. ... Nefrums 12 Reactor Nuclear Power; Tileable Circuit-less Kovarex;In your setup you turn on nuclear at 40% charge and that will charge the accumulators by using nuclear power. And you turn nuclear of at 80% charge. That means 40% accumulator storage is bought by fuel. 40% came from somewhere and is never touched (except in an emergency). And only 20% is actually storing solar power (worst case).Use the 2 reactors as anchor: they must overlap the 2 south reactors from the reactor blueprint. If you want to add another field, add another "Reactor 2x6" field to the north. No supply blueprint. It's only required once for a whole tiled setup. To start the reactors, disable or remove the constant combinator south outside of the reactors.Hello everyone! First time poster here. Was having some occasional brownouts here and there with my 1x1 nuclear setup. Finally decided to take some…My 10× Tileable Nuclear Reactor Setup. Design / Blueprint. Express belts are inputs, Fast belts are outputs. Easily modifiable to either two Express belts side-by-side or bot delivery. Can be a little bit further from the reactors, but push it too far and your heat pipes won't be hot enough. I apologize for the mirror image.Jun 24, 2016 ... Comments ; Factorio Nuclear! How to Guide! 1.0 Edition! Yama Kara · 85K views ; Factorio Tutorials: Nuclear Power Setup & Ratios (Uranium ...

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Find blueprints for the video game Factorio. Share your designs. Search the tags for mining, smelting, and advanced production blueprints. Find blueprints for the video game Factorio. ... Very compact nuclear setup for 4 reactors. No buffers inculded, just use the energy and you are good to go ^^ Copy to Clipboard Show Blueprint Show Json.Using productivity modules will substantially increase that, up to 7.84 reactor-seconds per second, which would almost let you run 8 reactors continuously just from basic processing alone. If you do a smart-reactor setup of some sort, that U-235 consumption will be drastically cut, as well, as you say you're only drawing ~20MW on average.This blueprint book contains a tileable column based nuclear power system. It contains 2 reactors, 30 heat exchangers and 50 steam turbines, and two water pipes per column. All of the blueprints are setup to work based on 4 columns at a time.Factorio Blueprint Tokens ⚙️ are earned from Space Science using a variable conversion rate we will control. Since you can now earn crypto by just playing the game, the game basically pays for itself. ... nuclear reactor setup, etc.) ruins the fun of figuring out how to build those things yourself. One of the best things about the blueprint ...

20 reactor setup I just finished designing. I used the mods Waterfill and Advanced Substations. Works great and its wired to save fuel cells! Blueprint string in the code block. I think this is almost the best design for nuclear power plants of 20 or more reactors.The scenario is 2xN vs. M * 2x2. The shorter the reactor the bigger the loss in efficiency. Below 2x2 the loss is catastrophic. At the 2x2 stage it still is big and it always is there no matter how many 2x2 reactors you build. You are throwing away 160MW for every quad reactor you build. mrvn.This is part of the black box of the reactor building and you can't really affect this in the game. (Interestingly, Factorio reactors always burn fuel at the same rate regardless of load which does seem counter to actual reactors.) There are reactor designs irl that are impossible to meltdown.It's also waaaay more space efficient than storing energy with accumulators. Accu: 5 MJ / 4 tiles = 1.25 MJ/tile. Storage tank: A turbine consumes 60 steam/second for an output of 5.8 MW (500°C) or 1.8 MW (165°C). So 1 tank can power a turbine for 416s, for a total power of 2412 MJ (500°C) or 749 MJ (165°C). With a space requirement of 24 ...Internal name. used-up-uranium-fuel-cell. Required technologies. None required. Produced by. Consumed by. A used up uranium fuel cell is produced in nuclear reactors by burning a uranium fuel cell. It can be reprocessed into uranium-238 .Set up the arithmetic combinator: Setting the input to petroleum Gas + 0 (the constant 0 not the signal 0) Set the output to the pink signal (on the bottom row of the last tab of signals.) Set up the lamp: Select the "Use colors" check box on the lamp. Set the condition to the pink signal, and what value you want (i.e. > 100)I have actually just finished a barrelled-water, bot-supplied, tileable, 2n reactor design. With 4 speed3 modules in a single L3 assembler, it can unbarrel fast enough to keep 9-10 HX supplied. . You will need a decent barrelling plant to keep up with 32 cores: 200+ barrels / second, at full power output, which would require 5+ full blue belts ...This way the reactor control unit knows how many turbine blocks there are. Reactor row control. Reactor row control. The reactor row control is also quite simple. The inserter "1" is set up to insert a single nuclear fuel cell into the reactor whenever the inserter "2" removes an empty fuel cell. Both inserters have a stack size limit of 1.Aug 23, 2017 ... The nuclear power research allows the basic construction of nuclear reactors which are complex to set up but have a high energy density.

Nuclear fuel. Nuclear fuel is a type of fuel. It has the highest energy density and vehicle bonuses of all the fuel types, providing an acceleration modifier of 250% (compared to rocket fuel 's 180%). The vehicle top speed modifier (115%) is the same as for rocket fuel. Nuclear fuel is made from rocket fuel and uranium-235, one of each to ...

The simplest way I've seen is to wire your nuclear fuel input and output inserters together so the input inserter (stack size 1 mind you) only activates when the output inserter is taking out a used fuel cell. You have to bootstrap this system by manually inserting one fuel cell, but it will reliably keep only one fuel cell in your reactors at ...Consider isolating a 2x3 section and make everything it needs fit in the vertical space of the 3 reactors. Then you can make it tileable. You can fit the water pumps for each 2x3 reactor inline too, either with "safe waterfill" mod, water pumpjacks mod, or just building the nuclear power plant on a lake with a lot of landfill.Water-based nuclear reators blueprints! Design / Blueprint. Made a couple of nuclear reactor setups for you gamers. Both are energy conservant - loads fuel cell only on low steam. To activate first (1.3 GJ) you need to have an item on a belt (steel chest by default) idk why i made it so complex. Second one (3.2 GJ) is just combinator switch, it ...A single unboosted reactor needs 4 heat exchangers and 7-8 turbines. Your setup needs 19 times that amount to not waste any of the power you're generating. If you made this setup a pulse reactor, you could use less turbines, but you'd still need 76 heat exchangers and 76 storage tanks to buffer the steam from a single pulse.The Kovarex enrichment process is named after Michal Kovařík, lead designer of Factorio and co-owner of Wube, whose online nick is kovarex (which he usually spells lowercase). [1] In the real world, uranium-235 is the most common fissile isotope of uranium and makes up approximately 0.72% of naturally-occurring uranium, with the other 99.28% ...May 4, 2018 · As of this writing, power output for a single nuclear reactor is 40MW, which equates to approximately 4 heat exchanges and 7 turbines at full output. When two powered reactors are side-by-side, that same single nuclear reactor is now 80MW, or 8 exchangesand 14 turbines respectively. Then add the output of the other reactor and the power ...82 votes, 32 comments. 351K subscribers in the factorio community. Community-run subreddit for the game Factorio made by Wube Software. ... so that gives you 45MJ/C*400C = 18000MJ of energy storage in heat. A reactor in a 2x2 setup outputs 120MW for 200seconds = 24000MJ of energy, so you only need to store 24000MJ-18000MJ = 6000MJ = 61856 Steam ...

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Community-run subreddit for the game Factorio made by Wube Software. ... On your second point, I normally set up a single reactor as soon as I get the research, and simply don't power my main setup until all 4-8 reactors have an empty cell in them. ... Inserters will feed a nuclear reactor until 5 fuel cells are in the input slot, so in the ...I have some trouble with my nuclear setup. I've built a 4 reactor setup, checked the ratios here on the wiki and on YouTube 4 reactors, 48 heat exchangers, 83 turbines, 6 water pumps. I have plenty of fuel, its produces around 480MW as it should be. But time to time it dips down under satisfaction, well below 150M, the usage is around 200MW.As announced previously, Factorio is now available for Nintendo Switch. You can find it on the Nintendo eShop in your region. ... Allowing players to easily share big blueprints (blue science, nuclear reactor setup, etc.) ruins the fun of figuring out how to build those things yourself. One of the best things about the blueprint library is that ...Jun 24, 2016 ... Comments ; Factorio Nuclear! How to Guide! 1.0 Edition! Yama Kara · 85K views ; Factorio Tutorials: Nuclear Power Setup & Ratios (Uranium ...The idea is to find a longish lake with lots of room around it, landfill it except for two trenches, and then add rows of nuclear plants as desired. Each 'tile' is 2x2 reactors in the center and on each side 3 pumps feeding 32 exchangers feeding 55 turbines, for 640MW per tile: Reactors & Heat exchangers: Core is simply 2x2 reactors fed by two ...It is a simple 4 Reactor build focused on optimal ratios for water/steam. This design is tileable with a continuous line of fuel inbound and used fuel outbound. This should ideally be built long a straight shore line. The ideal ratio is 4 Reactors, 48 Heat Exchangers, 83 Steam Turbines and 5 Water pumps.Also, you can remove the constant combinator in your setup by doing the following changes: Change the decider combinator that is checking for the spent fuel from sending Signal_Green, input count to instead send Signal_Red, 1. Then change your SR Latch to Signal_Green > Signal_Red output Signal_Green,1. you can achieve the same with less ...Ugh, pass. Nuclear reactors are not barely contained atomic bombs. Meltdown != explode. Furthermore, the risk of meltdown isn't even an inherent quality of fission power. The reactors in current use require active cooling, yes, but those designs are positively ancient. There exist more modern designs that *physically cannot* meltdown, the heat ...This board is to show, discuss and archive useful combinator- and logic-creations. Smart triggering, counters and sensors, useful circuitry, switching as an art , computers. Please provide if possible always a blueprint of your creation.So for 1TW nuclear power is obviously the way to go. With neighborhood bonuses, A perfect square would be the most efficient. A 71×71 setup would work, but I doubt the heat pipes can be extended far enough to dissipate all the generated heat (I'm running the latest Factorio version, currently 0.16.13, which includes the heat pipe fix from 0.15 ... ….

Two 2x2 reactors generates 85% what a 2x4 reactor can do (960 MW instead of 1.12GW) and are trivial to set up from a fluid routing perspective. Taking into account the efficiency losses that you have when using condenser turbines, a pair of 2x2 power plants may be even more efficient than a 2x4 that uses 75% condenser turbines and 25% standard ...Nuclear reactors with kovarex process are more expensive initially, but cheaper than solar for large facilities. Nuclear reactors need less space than solar. The trade is that you'll be spending a lot more time getting nuclear set up, just getting the resources for solar panels might be quicker depending on resource availability.The formula for this, for a 2xN layout, is 12000 steam * 160 MW * (# of reactors - 1) / (5.8 MW * # of turbines). The 12000 steam comes from the number of ticks in a cycle (12000) and the amount of steam a turbine consumes at full draw (1 steam/tick). The constants, once combined, work out to ~331,034.5, which limits the number of reactors this ...Each exchanger produces enough steam for 1.7 turbines on average, or 103 steam/s at full load dumped into pipes. Putting a turbine immediately after a heat exchange reduces pressure to 43 steam/s dumped into pipes. A line of pipes can only withstand so much steam per second, depending on distance. If you want smaller designs with 4, 3, 2 or 1 ...May 29, 2017 ... In this Factorio 0.15 Workshop, Xterminator and Madzuri cover multiple different Nuclear Power Builds / Designs / Setups. They vary in size, ...Details. A nice, compact 2x2 reactor setup. Features: Anti-waste logic - Will only use reactor fuel when it actually needs to. Utilizes steam storage to create the necessary buffer. Already set up and ready to go, no configuration required. Max output of 489 MW for short bursts, 479 MW sustained (due to weirdness in steam production/usage numbers)Super efficient nuclear power plant core. My latest over engineered solution: a super efficient nuclear power plant. This is the core of a nuclear power plant capable of using almost all the energy in a fuel cell. Should be useful in the mid game, before Kovarex enrichment is available, or to power distant outposts (I designed this mostly to ...Super efficient nuclear power plant core. My latest over engineered solution: a super efficient nuclear power plant. This is the core of a nuclear power plant capable of using almost all the energy in a fuel cell. Should be useful in the mid game, before Kovarex enrichment is available, or to power distant outposts (I designed this mostly to ...Double Reactor Nuclear Plant. I usually start with a 2x4 reactor setup (8 reactors in total) and when I start getting several beacon outposts, I build a setup containing 32 reactors. Don't bother with 1-2 reactor setups. Neighbour bonus should be exploited. Little tip, don't bother with storing the steam.The simplest way to control fuel use is to only take the previous spent fuel out when you are running out of steam, and only insert fuel while you are taking spent fuel out. This trivially limits the maximum number of fuel cells in the reactor to one. Make sure you have less steam engines / turbines than your heat exchangers could power, so you ... Factorio nuclear reactor setup, So unless you're planning on running the whole plant in short bursts to get 5% more fuel efficiency you're better of with a smaller plant. 20x5 reactors with holes give 4*3 + 70*4 + 24*5 = 412, 2x49 gives 4*3+94*4 = 388. That's 6.2% better. Indeed, not much. It would have to run 93.8% of the time for the same energy., Once the reactor is operating normally, this will be the only thing outputting a used fuel cell signal. Stack size needs to be 2 or higher. This will allow the used fuel cell buffer in the reactors output to stay at 0. The input inserter should enable if used fuel cell > 0, with a stack size of 1., FACTORIO MASTER CLASSThis series of Tutorials and How To Guides help you become a better Factorio EngineerEach video serves as a beginner's guide but also …, Factorio CheatSheet says that 4 cores loss-less need 40 steam tanks. There is an inconspicuous note down-there saying : "not including heat stored in the reactor or pipes (both heat and steam). "That note means, you actually need 2 ( y e s, t …, The main advantage is, that heating 95°C water back to steam requires much less energy compared to heating the 25°C water you get from the lake. 4. The nuclear reactor. All the previous changes are usable also with the regular coal boilers and provide more efficient and powerful way to use the heating power. The nuclear reactor is just a more ..., OP • 2 yr. ago. I've seen some Kovarex setups here recently, and I thought I would share my basic setup. This system is tileable, supply independent, output independent and requires no circuits for continuous operation. The downsides to this design is the U-235 must be hand seeded and the input must be pure U-238. Blueprint., Now on to the tests: no mods at all, energy interface setup for 10GW load and 2 infinity chest to either get rid of or provide fuel cells. 2x2 was only one with roboports and had 150 bots to play around with. 5.5GW reactor was the worst. 2x2 was better. 2xn was either same as 2x2 or slightly better., I designed this to be easily scalable to meet power needs as you go. You can start by placing a 4 reactor setup, then when you need more just stamp a larger one right over top the previous one. I stopped at 14 reactors because of heat pipe limitations, but it also snaps to grid to easily place down more next to it., Spent fuel cells can be reprocessed into plutonium and plutonium fuel cells (plutonium + U238). They have an orange glow instead of green. It is a sort-of Kovarex enrichment, because it allows to inefficiently consume U-238, but it's much earlier in the game. You just need some U-235 to kickstart the process., Factorio Blueprint book with all blueprints from Nilaus's Master Class series. Posted by anonymous 3 years ago. Masterclass by Nilaus - Master book Nuclear Power by Nilaus - …, Nuclear setup for dummies. Question. Greetings! Could you help out a nuclear power noob? I've set up a nuclear power setup by using the factorio wiki's tutorial for ratios. …, Tekky wrote:Currently, in order to manage the reactor efficiently, I would have to setup a timer using the circuit network in order to prevent feeding additional fuel to the reactor and to determine when it is time to feed the reactor with more fuel.If my (unverified) calculations are correct, a reactor requires a new unit of fuel every 200 seconds and I should never feed it more fuel ..., Compact, Smart 1.1 GW 2x4 nuclear plant "little witch" 1.1 GW of awesomeness. Features: Compact: probably the most compact design that maintains the correct ratio. Only 1 roboport is needed for entire construction. Perfect ratio. 1.1 GW sustained power with minimal materials One side water: very easy to connect to water, no need of landfill or ..., So unless you're planning on running the whole plant in short bursts to get 5% more fuel efficiency you're better of with a smaller plant. 20x5 reactors with holes give 4*3 + 70*4 + 24*5 = 412, 2x49 gives 4*3+94*4 = 388. That's 6.2% better. Indeed, not much. It would have to run 93.8% of the time for the same energy., Re: "Laid back" compact 2x1 -> 2x2 nuclear reactor. by qwr » Tue Dec 28, 2021 9:27 am. Very nice and space compact design which should be able to produce enough energy to handle 100 SPM factories. As you said, the setups "waste" a few turbines (4 turbines for 2x1 reactor setup, 13 for 2x2 reactor setup according to https://wiki.factorio.com ..., Once it had gotten to 99% it will connect itself back to the main grid. #2. Power overall is way too low to power the pumps and the block averaged over 910c since the pumps cant get the hot water away fast enough. Once the average temp hits 876c it will connect back. Not normally an issue, but it happens., My attempt for compact 2x Nuclear Reactor. My attempt to make compact 2x nuclear reactor setup. I can make it use fewer spaces but I want to make it as square and as symmetrical as possible, for the sake of aesthetic (to me). Also can be easily expanded by relocating the 2 top steam turbine. I don't know about its efficiency though, looking at ..., Re: Compact 4.8 GW Nuclear Reactor. by Nosferatu » Sat Feb 06, 2021 7:22 pm. @trueosiris: There are a lot of green wires inside your reactor. Build a constant combinator set it to Steam -900.000 and connect it to the green wire. As long as the constant combinator is switched to "on" the reactor will run on full power., You have too many HX and Turbines and your reactors can't supply enough heat to power them. You're trying to pull out more power than the Nuclear reactors are generating. Each Reactor is generating 120 MW of heat, so 480 MW, each heat exchanger can exchange about 10 MW of heat to steam power, and each turbine can convert around 6 MW of steam ..., Community-run subreddit for the game Factorio made by Wube Software. I just made a 100% fuel efficient nuclear reactor. If all that circuitry is for inserting fuel cells when steam is low you can just wire the output inserter to the steam and enable it when steam is low. Wire the input inserter to the output inserter and enable it when the ..., This video showcases a smart and easy design that works quite well for your Nuclear Reactor in Factorio, it only gives the reactor 1 piece of Uranium cell so..., A 2x2 reactor setup gets 3x neighbor bonuses on each reactor, giving you 12 reactors worth of output. This seems to be the sweet spot--it's a huge improvement on a lone reactor or 1x2 reactor, but diminishing returns kick in hard above 2x2. A 4x2 setup produces 28 reactors of output--2.33x the heat for 2x the cost., Due to the complexity and unpredictability of the Factorio fluid system, the circuit regulation system is not 100% perfect if the demand on the reactor rapidly changes from sustained low load (0–500 MW) to sustained high load (1.2–1.4 GW). I remember running into a similar problem when designing my own 12-reactor setup., Community-run subreddit for the game Factorio made by Wube Software. ... Might be a good idea to get into space on a first launch before dropping a 4-reactor nuclear setup, that many centrifuges seems like alot. I am supporting 6 (2x2 and 2x1) on ~10 centrifuges + 6 enrichment + all my other planets., 4 reactors nuclear plant without logistic chests. by fly » Wed Jul 19, 2017 7:14 pm. Just another 4 reactors setup. This is tradeoff between compactness, aesthetics (or symmetry, if you will ) and Logistic network embargo. It's 4 reactors - 48 heat exchangers - 84 steam turbines - 48 storage tanks - 5 offshore pumps (not visible on screenshot)., The slice blueprint is setup so that it adds heat exchangers and turbines to the "previous" reactors, adding 4 exchangers and 9 turbines to the last "line". That way, the center reactors become paired to 16 exchangers and 27.5 turbines each, while the end reactors are still paired with 12 exchangers and 21.5 turbines., Jun 24, 2022 · Factorio 1.1 Tutorials. If you're unfamiliar with Factorio, new to the game, or looking for a 'refresher course', you've come to the right place! My aim is..., There's a way to setup a circuit condition to turn off the insert to the reactor when the steam reaches a certain point and to turn it back on again when it drops to a certain level. Most people don't though because uranium is plentiful and easily obtained. When I setup Nuclear, I usually use the max number of turbines allowed but it can vary some., 8-core 1.1GW v4.1. signal-0. signal-8. nuclear-reactor. Details. This is a rock solid design that is self-priming. Just build it and supply fuel and it will start working. Circuit is based on a timer that prevents feeding fuel more often than it takes to burn it, as well as a steam threshold. The BP is set to refill at 20K steam (measured at 2 ..., The Kovarex enrichment process is named after Michal Kovařík, lead designer of Factorio and co-owner of Wube, whose online nick is kovarex (which he usually spells lowercase). [1] In the real world, uranium-235 is the most common fissile isotope of uranium and makes up approximately 0.72% of naturally-occurring uranium, with the other …, 1 First steps. 1.1 Uranium ore. 1.2 Ore processing. 1.3 Fuel. 1.4 Nuclear reactor. 1.5 Heat exchanger. 1.5.1 Heat pipes. 1.6 Steam turbine. 1.7 Simplest thing that works. 2 Moving forward. 2.1 Neighbor bonus. 2.2 Always on! 2.3 Enrichment. 2.4 Reprocessing fuel. 2.5 Raw resource cost of running a single … See more, Community-run subreddit for the game Factorio made by Wube Software. ... Members Online • samnrad . If you preheat the water going into a nuclear setup using a boiler, does that mean the reactor spends less time on startup heating the water, and thus uses less energy to get the water to optimal temperature, saving a little nuclear fuel ..., So I looked for a nuclear configuration with the number of exchangers being an integer multiple of 12. That turned out to be 2x5, which has 144 exchangers. Since there are two exchangers on each side of each heat pipe, that gives us 6 sets of exchangers.