Desuperheater

Hi everyone,
What is desuperheater ? how it is useful in solar system?
Anybody knows about this?
Thanks,
Rajesh Kharche
Tagged:
Hi everyone,
What is desuperheater ? how it is useful in solar system?
Anybody knows about this?
Thanks,
Rajesh Kharche
Comments
Second system 1890W 3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.
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Superheat is the heat supplied a working fluid such as steam or freon that raises its temperature above its condensing point.
It is usually specified in degrees which is a misnomer. It should be called super temperature. But going on.
A steam turbine can only work on the superheat in the steam.
When the temperature of the steam gets down to its condensing temperature it becomes wet and the turbine can no longer extract power.
For this reason steam plants always have superheaters in their boilers.
In fact the steam is usually returned two or three times back to the boiler for more superheat before it is exhausted to the condenser.
This is the reason for the two or three stage turbine.
In the case of a heat pump, the superheat in the compressor discharge is due to the in-efficiency of the compressor.
If we could make a compressor that was 100% efficient it would have no superheat in its discharge.
Desuperheaters used to be quite common with the old air conditioners and heat pumps.
In this case a heat exchanger (desuperheater) was placed in the compressor discharge to produce domestic hot water.
Any hot water produced was free since this superheat energy is normally wasted in the condenser.
But today compressors and the freons are much more efficient resulting is less available superheat.
Because of the reduced superheat it is less worthwhile to try to collect it.
You can still get heat pumps with desuperheaters in them but they do not produce much hot water.
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