Volume No. 5 Issue No.: 1 Page No.: 23-33 July-September 2010




T. Arunkumar , R. Jayaprakash*, K. Perumal1 and Sanjay Kumar2

1. Solar Energy Laboratory, Department of Physics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore-641020, Tamil Nadu, (INDIA)
2. Centre for Appropriate Management Chandragupt Institute of Management Chhajubagh, Patna- 800 001, Bihar, (INDIA)


Received on : December 31, 2009




The use of solar energy in thermal desalination processes is one of the most promising applications of the renewable energies. The thermal conversion of solar energy by means of solar concentrators makes it possible to reach high temperatures able to boil the salted water with pressures higher or equal to the atmospheric one. The desalination process is carried out by coupling a single slope solar still with compound parabolic concentrator (CPC). The experiments are carried out at January and February 2010. The newly designed crescent shaped absorber is at the focus of the CPC and its inlet and outlet are connected to the single slope solar still. The performance of the study is analyzed by two different modes. The single slope solar still is coupled with crescent absorber under top cover closed condition to avoid solar radiation which enters into the still alone and the still with open condition for the entry of solar radiation. The area of the still is about 0.25 m2. The system temperature such as water (Tw), air (Tair), inner cover (Tin) and outer cover (Tout) are measured by type-K thermocouples and digital thermometers. The humidity and wind velocity are also recorded during the study. The hourly output and instantaneous efficiency are also calculated. The primary focus is on these technologies suitable for use in remote areas, especially those which could be integrated into other solar thermal energy systems.


Keywords : Desalination, Compound Parabolic Concentrator, Crescent absorber, Renewable energy, Solar radiation