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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Heat Losses from Receivers for a Multifaceted Parabolic Dish Solar Thermal Collector

Get access (open in a dialog) DOI: 10.1615/IHTC12.230
6 pages

要約

Heat losses from receivers for a dish-type solar energy collecting system of Korea Institute of Energy Research (KIER) are numerically investigated. It is assumed that a number of flat square mirrors are arranged on the parabolic dish structure as a reflector. Two different types of receivers, which have conical and dome shapes, are considered for the system, and several modes of heat losses from the receivers are thoroughly studied. Using the Stine and McDonald model convective heat loss from the receivers is estimated. The Net Radiation Method is used to calculate the radiation heat transfer rate by emission from the inner surface of the receiver to the environment. The Monte-Carlo method is adopted to predict the radiation heat transfer rate from the reflector to the receiver. Tracing the photons generated, the reflection loss from the receivers can be estimated. The solar radiation spillage around the aperture is calculated. Based on the results of the analysis, the performances of the receivers with the multifaceted parabolic solar energy collector are estimated.