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Investigation of Thermal Performance of Solar Air Heater Using Half Rhombus

Journal: International Research Journal of Advanced Engineering and Science (IRJAES) (Vol.3, No. 4)

Publication Date:

Authors : ;

Page : 49-52

Keywords : Heat transfer coefficient; solar intensity; Reynolds number; artificial roughness; Thermal performance;

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Abstract

Energy is required to sustain our life. Ventilating your home during normal days can save your money, except in the summer. Ventilation creates a wind chill effect that cools your body. Ventilation cooling is usually combined with energy conservation measures like shading provided by trees and window treatments, roof reflectivity (light-colored roof). Forced air circulation can be used along with natural ventilation in order to increase comfort. Ventilation provides other benefits besides cooling, like fresh air to breathe. Indoor air pollutants tend to accumulate in homes with poor ventilation. Natural ventilation relies on the wind and the “chimney effect” to keep your home cool. The wind will naturally ventilate your home by entering and leaving windows, depending on the wind direction. Heat accumulated in your home during the day can be flushed out by the cool night air. Wind moving over the wall creates a vacuum that pulls air out of the windows. The chimney effect occurs when cool air enters the first floor or basement. The cool air entered, absorbs heat in the room, rises, and exits through ventilating windows. This creates a partial vacuum, which pulls more air through lower-level windows.The energy resources available on the earth are in various forms like sunlight, fossil fuels, hydraulic energy, wind energy, tidal energy, geothermal energy and nuclear energy resources etc. Energy resources may be classified in two ways i.e. conventional and non-conventional energy resources. Our demand of energy is increasing continuously and rapidly with increasing population of the world. Conventional energy sources like coal and petroleum are rapidly decreasing. Saving of energy for future as well as finding alternative energy resources to fulfill our demands in future should be our aim. Solar energy is the best source of energy to fulfill our present and future demands. Sun is the ultimate source of energy. It is easily available anywhere, abundant quantity in nature, available free of cost and its use is free from pollution and it is also inextinguishable resources of energy. Solar energy is available in the form of solar radiation. This radiation needs to be harnessed for making proper use of sunlight. Various types of solar collectors are used to convert solar energy into heat and further it can be transformed into the other forms of energy.

Last modified: 2018-12-26 23:08:21