Abstract
ABSTRACT Rotary regenerative heat exchangers are commonly used in the industry. However, the corrosion of sheets that are in contact with the operating fluid is considered as the disadvantage of these heat exchangers. This causes a reduction in the lifespan of this kind of heat exchanger. The object of the present study is to evaluate and compare the exergy loss and the second law efficiency of a rotary regenerative heat exchanger, which is made from two types of simple aluminum sheets and anodized aluminum sheets are. Anodized sheets are used to enhance the corrosion resistance of the regenerative heat exchanger. The results indicated that the lower exergy loss and the dimensionless exergy loss with anodized sheets about 14–24% and 15–20% compared to the heat exchanger with simple sheets, respectively. Besides, the effects of rotational speed of the matrix, inlet temperature of hot flow, and the flow rates of hot and cold flows on the rotary regenerative heat exchanger are evaluated. Finally, some empirical correlations have been developed based on the obtained data and curve fitting process.
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