Document Details

Document Type : Thesis 
Document Title :
Theoretical Study On Thermal Performance
دراسة نظرية عن الأداء الحراري لمسخنات الهواء الشمسية
 
Document Language : Arabic 
Abstract : In this work, the thermal performance of a flat plate solar air heater with channel for the passage of air between the absorber plate and glass cover was studied. The study was performed by a computer program that was prepared by using Pascal language depending upon the solution of energy balance equations of the heater elements, assuming the temperature of the flowing air to be position dependent. Analytical formulas for temperatures of various components of the heater, heat loss coefficients and efficiency had been obtained. Influence of the design and operational parameters; such as, the length and width of the air heater were studied. It was found that the temperature of the air heater increases with increase of both the length and width of the heater until specific values of these variables; then, the increase in the outlet air temperature becomes less dependent on the length and width of the heater. Therefore, the best area that gives the highest possible efficiency of the heater was found to be 6 m2 The effect of mass flow rate of air on the air heater's performance was also studied. To improve the heater performance, effect of using different selective absorbers on the daily efficiency of the heater was also investigated. Comparison between the heater performance with black painted and selective coated absorbers showed that, the Ni – Sn selective material improved the heater performance all year round. This study confirmed that the solar air heaters, as an application of converting solar energy into heat, does not require complex technology in their manufacturing and maintenance. Thereon it can be used for drying agricultural crops and heating of buildings in cold areas of the world. 
Supervisor : Ahmed Mohamed A. El- Sebaii 
Thesis Type : Master Thesis 
Publishing Year : 1431 AH
2010 AD 
Number Of Pages : 92 
Added Date : Tuesday, March 18, 2014 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
هند عتيق السنانيAl-Snani, Hind AteegInvestigatorMaster 

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