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Research Paper | Power Engineering | India | Volume 3 Issue 9, September 2014

System Design for Freon Driven Solar Thermal Pump

Diptanu Dey | Nivedita Laskar

Abstract: Unlike other Solar Pumps, here is a concept where we dont need to use Solar photo-voltaic cells to generate electricity to run the pump. Instead, we directly absorb solar heat from the solar radiation to heat up a working fluid, turn it into vapour and use the pressure developed by this volumetric expansion to create a reciprocating motion which can run a pump to pump out ground water. This pumped out water is further used for condensing the vaporised working fluid back to liquid state so that it can be returned back to the cycle. Solar collectors can achieve temperatures upto 200C and much more. The trick is to use a low boiling point working fluid such as Freon R-11. It has a typical boiling point of around 22C. So, even if a temperature of 100C is applied, we can derive high pressure vapour and this can be utilised to run the pump. A Solar photo-voltaic cell has a maximum efficiency upto 29 %, but this system is expected to have much more efficiency.

Keywords: Solar Thermal, Pump, Renewable Energy

Edition: Volume 3 Issue 9, September 2014,

Pages: 415 - 419