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Numerical and Experimental Study on Temperature Crossover in Shell and Tube Heat Exchangers
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Fuhua Jiang
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June 30, 2011
Experimental and numerical studies were conducted to investigate the heat transfer characteristics of five shell and tube heat exchangers (STHXs) with ratio of the length to width (L/W) at the range of 1.85 to 9.23. Temperature crossover in counter flow STHXs is meaningful in food processing industry. The relationship between temperature crossover and L/W is proposed for the first time. Both the experimental and numerical results show that temperature crossover can be achieved in STHXs with L/W?4.62 and can’t be achieved any more in STHXs with L/W?3.08. The results also indicate that heat transfer performance decreases with L/W decreasing. The inherent reason of this phenomenon is analyzed by computational fluid dynamics method.
Keywords: temperature crossover; temperature difference field; shell and tube heat exchanger; uniformity factor
Published Online: 2011-6-30
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Keywords for this article
temperature crossover;
temperature difference field;
shell and tube heat exchanger;
uniformity factor
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