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Numerical simulation of solar chimney integrated with exhaust of thermal power plant

Al-Kayiem, Hussain H. and Yin Yin, K and Yee Sing, C (2012) Numerical simulation of solar chimney integrated with exhaust of thermal power plant. In: Advanced Computational Methods,and Experiments in Heat Transfer. WIT Transactions on Engineering Sciences (75). WITpress, pp. 61-72. ISBN 978-184564602-8

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Abstract

• The heat losses within exhaust gases are an unavoidable part of operating any fuel-fired system. The flue gases still hold considerable thermal energy, which is exhausted to the atmosphere as waste heat and contributes to global warming. This paper presents a developed technique to enhance the performance of low temperature solar thermal systems by utilization of thermal energy recovery of flue gases. A CFD model was established based on the energy, momentum and mass conservation and the state equation in 2-D, steady assumption with kepsilon for the turbulence modelling using FLUENT - version 6.2.16 software. The model simulates the thermal and fluids flow processes in an inclined modified solar chimney. The flue inlet temperature was varied as, T f g= 603K, 843K, and 983K. The simulation results were validated by comparison with experimental results obtained from a lab scale model, and acceptable agreement was gained. When the flue temperature is increased from 605K to 843K, the performance is enhanced by 75%. The interesting find is that the efficiency of heat collection tends to increase as the absorber length increases up to a certain length, and then starts to decrease. In this study, the suitable dimension for solarflue gas collector is about 2.5 m

Item Type:Book Section
Subjects:Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TD Environmental technology. Sanitary engineering
Academic Subject One:Academic Department - Mechanical Engineering - Energy - Energy conversion - Boilers, heat recovery, cooling towers, etc.
Academic Subject Three:petroleum engineering
Departments / MOR / COE:Mission Oriented Research > Energy
ID Code:8848
Deposited By: Assoc Prof Hussain H. Al-Kayiem
Deposited On:16 Jan 2013 02:07
Last Modified:20 Mar 2017 01:59

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