Abstract
The objective of this study is to analyze the heat transfer by radiation in a plate-fin heat exchanger. Strip fins are employed to enhance heat transfer. Compact heat exchanger has been in use for many applications, including automobile, radiators, air-conditioning systems and electronic cooling devices. However, one of the important application of them is in microturbine cycle, where hot stream enter the heat exchanger with temperature of 950°C. So, heat transfer by radiation is important due to high temperature. However, the results show that when there is forced convection in the plate-fin heat exchanger the radiation is negligible, because of low value of the fin height and flow length. Key words: Radiation, plate-fin heat exchanger, heat transfer coefficient, forced convection.
Highlights
Full Length Research PaperThe objective of this study is to analyze the heat transfer by radiation in a plate-fin heat exchanger
One of the first papers to treat the radiation mode as the sole means of heat dissipation from the faces of a fin was that of Callinan and Berggren (1959)
The radiation interchange between fin and tube was approximated except that interreflections were not considered for the gray body case, and no account was taken of the incident radiation from the fin on the tube
Summary
The objective of this study is to analyze the heat transfer by radiation in a plate-fin heat exchanger. Strip fins are employed to enhance heat transfer. Compact heat exchanger has been in use for many applications, including automobile, radiators, air-conditioning systems and electronic cooling devices. One of the important application of them is in microturbine cycle, where hot stream enter the heat exchanger with temperature of 950°C. Heat transfer by radiation is important due to high temperature. The results show that when there is forced convection in the plate-fin heat exchanger the radiation is negligible, because of low value of the fin height and flow length
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