Performance evaluation & analysis of low cost parabolic dish type solar collector for domestic & industrial heating application

From Indian perspective there is a large potential available for low cost solar water heating systems. With above system we can instantly fulfil needs of hot water in industrial sector. Concentrated solar collectors have high efficiency. Therefore for water heating application, we can achieve high efficiency. We used parabolic dish collector for instant water heating that can be used as a boiler feed water. Also this type of system is used for instant water heating in domestic applications. System consist of parabolic dish of 1.4 m diameter .It is made of anodised aluminium mirrors & supported with locally manufactured steel stand. This paper revels prototype design of solar parabolic dish collector with truncated cone shaped helical coiled receiver made up of copper & coated with nickel chrome at focal point. The concentrator receives approximately 1.064 kW/m2 of solar insolation with geometrical ratio of 21 (dependent upon time of year), which is concentrated and reflected to the receiver. Instantaneous collector efficiency of 68% was achieved with above described system.