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Essay On Solar Collectors

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Experimental Analysis of the Thermal Performance of Two Solar Collectors Models Under Egyptian Condition Mona M. A. Hassan* ABSTRACT The thermal performance of two solar collectors (batch system)was experimentally tested. Experiments were carried out during seasons of 2015 and 2016 at Faculty of Agriculture, Zagazig University, Egypt. In January, inlet water temperatures for both models were around 17 oC , and outlet temperatures were 27 and 23oC for models A and B respectively, while in July, inlet water temperatures for both models were around 35 oC, and outlet temperatures were 55 and 49oC for model A and B respectively. Obtained results show that model (A) can rise water temperature higher than model (B) almost throughout the…show more content…
Water enter at the bottom and is baked in the sun. As it warm, the hot water travel to the top of the tank due to its lower density. When the water is ready for uses, cool water is supplied to the ______________________________________________________ *Associate prof. of Agric. Eng., Fac. of Agric., Zagazig Univ. inlet and hot water flow out the top. Batch heater system, can also includes insulations to help maintains the temperatures of the heated water. Batch heater (also known as bread box or integral collector storage systems) are simple passive systems consisting of one or more storage tanks placed in an insulated box that has a glazed side facing the sun. Batch heaters are inexpensive and have few components in other words, less maintenance and fewer failures. A batch heater is mounted on the ground or on the roof. There are two types of solar water heaters systems: passive and active. Active system integrated pump and rotary element and are therefore very expensive. Passive system uses natural water circulations, gravity, and /or pressurized water system. Passive solar water heaters system are much less expensive than the active counterpart and are easier to maintains and repairs. Consequently, passive system are more suitable for low income community, (Duffie and Beckman,2013). (Al-Madani,2006) studied a batch solar water heaters in Bahraain consists of an evacuated, cylindrical glass
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