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Solar air heaters are generally used for low to moderate thermal energy requirements. These systems are cheap and easy to maintain, but due to the disadvantage of low thermal efficiency and because of low convective heat transfer coefficient between the absorber plate and the energy extracting carrier fluid, air. Several methods have been proposed for the enhancement of heat transfer coefficient of such collectors. Use of porous packing material in the collector duct is one of the methods. It considerably enhances the energy collection rate by increasing heat transfer rate between a carrier...

Conventional wind turbines in small units are costly and do not allow extensive use in our country for small-scale individual purpose. Also the highly efficient aerodynamically designed windmills require high wind velocity, which is not available in many states in India & Abroad. Considering all these an extremely simple design of a vertical axis wind rotor using two flat vertical vanes, swinging vanes has been fabricated and tested to obtain its performance. The torque and power coefficient have been obtained and presented in this Experimental thesis work. The results are highly encouraging...

Housing problem is becoming acute day by day and the valuable urban land is shorting at a very fast rate with the growing demand of increasing population. The conventional low rise development cannot meet the rising demand of more number of dwelling units per unit area so the only solution is high rise development with enough open spaces around the buildings for proper light and ventilation.High rise buildings to accomodate a higher density of the higher income group has been provided.The scheme provides for luxurious flats in a pleasant setting of wide open spaces and greenery.The...