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Document Details
Document Type
:
Thesis
Document Title
:
Theoretical study on thermal performance
دراسة نظرية عن االأداء الحراري لمسخنات الهواء الشمسية
Subject
:
Girls' College of Education in Jeddah
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
:
dr.
Thesis Type
:
Master Thesis
Publishing Year
:
1431 AH
2010 AD
Added Date
:
Wednesday, March 24, 2010
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
هند عتيق السناني
Al-Snani, Hind Ateeg
Researcher
Master
Files
File Name
Type
Description
26190.pdf
pdf
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