Cascade System of Solar Collector

Cascade System of Solar Collector

Author Name : Ravi Gautam, Nikhil Bajpai

ABSTRACT

This research paper explain about thehot water and steam are extensively mode use of in various applications as in daily industries, for cleaning of containers in hospitals for sterilization, for room heating purposes etc. all these applications consume a lot of electricity, which is not costly but it also irregular in supply. Hence in this study work has been done to devise a system which can give both heated water as well as steam, utilizing solar energy with reduced cost.The objective of this project is to develop & study a cascade types of two solar collectors of comparatively smaller surface  areas in which one is flat plate collector , which can generates heated water and the other one as  parabolic concentrating collector, which can help in converting already heated water by flat plate collector  into  steam.The flat plate collector heats the water using solar energy. The water which is passed on to flat plate collector from the overhead tank is heated water  at outlet of flat plate collector, which then flows by water circulation into parabolic concentrating collector & gets further heated by focused sun light, which is concentrated onto the parabolic concentrator  focal axis at which sunlight is absorbed by  the reflection from curved surface of  parabolic collector on the absorber tube and then  it transfers the heat absorbed to the already heated water, which is flowing through the absorber tube, which is then  finally converted  into steam. The produced steam oozes out of the absorber tube through a non-return valve, which opens due to the pressure exerted by the steam. Thus, heated water and the produced steam, which is generated through this system can be conveniently then used for various applications as stated above.

Keywords: hot water, sterilization, solar collectors, absorber tube, flat plate collector.