Organic Rankine Cycle (ORC) and renewable energy

Renewable energies except solar electric or thermal (seeforums dedicated below): wind turbines, energy from the sea, hydraulic and hydroelectricity, biomass, biogas, deep geothermal energy ...
fredericponcet
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Registration: 29/06/11, 10:17




by fredericponcet » 30/08/13, 11:56

fredericponcet wrote:
Forhorse wrote:What I'm going to say may be silly; but with a delta of 90 ° C and if it is for "only" 50W, it wouldn't be easier to use Pelletier effect cells?


To complete my previous message, based on these products:

http://www.hi-z.com/index.php

I estimated the cost of my installation to more than 500 € (not counting the DC / AC converter needed to run the circulator).

I may end up adopting this solution while waiting for better, but, for once, I think it's a bit expensive W. Now it is true that it is durable, reusable on any boiler and that the cost of kWh in the long run can become very interesting ...
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fredericponcet
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by fredericponcet » 30/08/13, 12:06

Forhorse wrote:(...) And then no development to do


it's a bit optimistic. See http://www.hi-z.com/papers/Dev%20of%20Self-Powered%20Pellet%20Stove.pdf.

Let's say: very little development ...
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chatelot16
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by chatelot16 » 30/08/13, 16:47

how much does it cost

the bigger the hz20 is announced at 19W, but it needs 230 ° C

95 ° C normal boiler, and 30 ° C cold side can still be used for a floor heating, their calculator gives 2,58W, and 1,95% yield

to make 50W it will require 20 modules

and it will require a thermal power of 50W / 0,0195 = 2564W

a 230 ° C is better, but it needs a special focus and a super temperature regulation because 250 ° C the module is dead!

the advantage of the steam boiler is that the ebulition of the water stabilizes the temperature: even if the fire heats up too much it will make more steam than consumes the engine, and the steam will come out through the safety valve : but there is no risk of overheating

in the industry when you want a heating at a precise temperature from a fireplace, it is done with steam ... therefore steam boiler at the pressure corresponding to 230 ° C

but once you have steam at 230 ° C you do not need to heat this kind of 4,5% efficiency module: with a steam engine at 230 ° C you can exceed 20% efficiency
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fredericponcet
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I understand econologic
posts: 95
Registration: 29/06/11, 10:17




by fredericponcet » 30/08/13, 23:37

chatelot16 wrote:how much does it cost

the bigger the hz20 is announced at 19W, but it needs 230 ° C

95 ° C normal boiler, and 30 ° C cold side


Why 30 ° cold side? If the modules are heated by water (so placed where I want) on the other side I cool them with water to a few degrees (probably less than 5).

But hey, OK, I'll buy you your steam engine. I dont have a religion. How much do you sell it?
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fredericponcet
I understand econologic
I understand econologic
posts: 95
Registration: 29/06/11, 10:17




by fredericponcet » 30/08/13, 23:38

chatelot16 wrote:how much does it cost

the bigger the hz20 is announced at 19W, but it needs 230 ° C

95 ° C normal boiler, and 30 ° C cold side


Why 30 ° cold side? If the modules are heated by water (so placed where I want) on the other side I cool them with water to a few degrees (probably less than 5).

But hey, OK, I'll buy you your steam engine. I dont have a religion. How much do you sell it?
0 x

 


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