Essay On Solar Collector

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CHAPTER: 2
OVERVIEW OF SOLAR COLLECTOR
2.1 OVERVIEW OF SOLAR COLLECTOR : Solar collectors are special type of heat exchangers that transform solar radiation energy into thermal energy. The key component of all solar system is the solar collector. This is a device which absorbs the solar radiation from sun converts into heat and transfers this heat to a fluid ( air, water, oil ) passes through the collector. The solar energy collected is carried from the circulating fluid either directly to the hot water or to a thermal energy storage tank from which can be utilized for use at night or cloudy days. There are basically two types of solar collectors: non-concentrating/stationary and concentrating. A non-concentrating collector …show more content…

2.1. When solar radiation passes through a transparent cover and impinges on the blackened absorber surface of high absorptivity, a large portion of this energy is absorbed by the plate and then transferred to the transport medium in the fluid tubes to be carried away for storage or use. The underside of the absorber plate and the side of casing are well insulated to reduce conduction losses. The liquid tubes can be welded to the absorbing plate, or they can be an integral part of the plate. The liquid tubes are connected at both ends by large diameter header …show more content…

One or more sheets of glass or other diathermanous (radiation-transmitting) material. Tubes, fins, or passages. To conduct or direct the heat transfer fluid from the inlet to the outlet. Absorber plates. Flat, corrugated, or grooved plates, to which the tubes, fins, or passages are attached. The plate may be integral with the tubes. Headers or manifolds. To admit and discharge the fluid. Insulation. To minimise the heat loss from the back and sides of the collector. Container or casing. To surround the aforementioned components and keep them free from dust, moisture,

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