Maximum entropy generation of in-series connected heat exchangers

✍ Scribed by Ahmed Safwat Nafey

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 103 KB
• Volume: 24
• Category: Article
• ISSN: 0363-907X
• DOI: 10.1002/1099-114x(20000610)24:7<561::aid-er587>3.0.co;2-d

✦ Synopsis

Theoretical analysis of entropy generation and availability destruction of &&n'' similar cocurrent or countercurrent heat exchangers connected in series are presented. A criterion for comparing the relative performance of any number of in-series connected similar heat exchangers is developed. The e!ect of di!erent in#uencing parameters such as the number of connected heat exchangers, the individual e!ectiveness of each unit, the heat capacity rate ratio and #ow arrangement on the quality of heat exchange are presented. It is found that, the maximum of availability destruction (maximum entropy generation) for in-series-connected similar cocurrent heat exchangers is obtained at *"1/(1# ). However, for counter-current heat exchangers connected in-series; * L "1/( L G GL). This analysis might be useful for a proper choice of the number of heat exchangers to be connected together and the choice for the best operating conditions.