SET Proceedings 2978-4387 Caravel Press 10.65582/set.2008.081 2008.081 Transient Heat Transfer Characteristics of a Receiver for a Dish-Type Solar Thermal System OhSangjune smilensmile@gmail.com LeeJuhan SeoJoohyun LeeJingyu Chenkuan chen@eng.utah.edu SeoTaebeom seotb@inha.ac.kr Graduate School, Department of Mechanical Engineering, Inha University, Incheon, Korea Department of Mechanical Engineering, The university of Utah, Utah, U.S.A Department of Mechanical Engineering, Inha University, Incheon, Korea 24082008 7 1 978-1-995850-08-5 639 646 24 August 2008 © 2008 Copyright WSSET 2008

A numerical and experimental studies are carried out to investigate the transient heat transfer characteristics of 5kWth dish-type solar air receiver. Measured solar radiation and temperatures at several different locations are used as boundary conditions for numerical simulation. Many parameters’ effects (reflectivity of the reflector, the thermal conductivity of the receiver body, transmissivity of the quartz window, etc.) on the thermal performance are investigated. Discrete Transfer Method is used to calculate the radiation heat exchange in the receiver. A transient heat transfer model is developed and the rate of radiation, convection and conduction heat transfer are calculated. Comparing the experimental and numerical results, good agreement is obtained. Using the numerical model, the transient heat transfer characteristics of volumetric air receiver for dish-type solar thermal systems are known and the transient thermal performance of the receiver can be estimated.

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