high pressure refrigerant using heat energy

[nadam54321]

Hi....am new to this field truly speaking....am an fashion design student...this Refrigeration and air-conditioning wont come in my field...but am interested so much in thermodynamics....

We have huge never-ending amount of solar energy...so using fresnel lens, concentrate at a spot to get really high temperatures (meaning huge amount of thermal energy)


So for commercial building's air-conditioning...
My doubt is "Cant we use thermal energy to compress a refrigerant instead of mechanical way to do??"

It could be done in two ways...one is directly applying heat energy to a closed vessel containing refrigerant or using high pressure steam for compressing mechanically (replacing electricity driven mechanical compresser).....

There the absorption system exists already which is being driven by using heat energy...but its performance could not able to meet the load....

Any help would be greatly appreciated in advance...

[Tesla]

Hi nadam
I have seen some threads on this forum talking about expanders - I think it's a compressor in reverse. The ultimate system would simply be a photonic refrigeration system where light is used to suck up heat like a lightining bolt freezes the surrounding air. But that one hasn't been invented yet, or there are zeropoint energy technologies emerging. I think light is where it's at not heat.

[desA]

We have huge never-ending amount of solar energy...so using fresnel lens, concentrate at a spot to get really high temperatures (meaning huge amount of thermal energy)

Can this fresnel lens be moved/rotated/shifted to focus on different points over time?

If so, how long would it take to re-set from old position to new position?

[fowlie]

hi nadam
i have seen this idea used for producing electricity in spain where a large amount of mirrors that move to capture the sun and reflect the heat to a main mirror which runs a steam turbine

[Graham]

G'day look at the Stirling Engine - the external combustion engine - I have heard of a zimbabwean farmer some ten years back constructed a engine that used F11 (now not recomended) as the refrigerant/gas a solar collector to expand the gas, the engine to drive a water pump and the pumped water cooled part of the engine and condensed the gas so completing the cycle. I have been trying to find a copy of the plans ever since I heard of it as I think that this is great idea that needs to be developed.