Using the expressions for the effectiveness of parallel and counter flow heat exchanger (e) as a function of heat capacity ratio (R = Cmin/Cmax) and number of transfer units (NTU) in Table 10-3 Heat-exchanger effectiveness relations, obtain the expressions for NTU as a function of e and R for both parallel and counter flow heat exchanger in Table 10-4 NTU relations for heat exchangers.

- Proof of relationship is required

  

Transcribed Image Text:

Table 10-31 Heat-exchanger effectiveness relations. N=NTU= Flow geometry Double pipe: UA -min Parallel flow Counterflow Counterflon, C=1 C= Cin Cmax Relation 1-expl-N(1+C)I 1+C 1-expl-N(1-C1 1-Cexpl-N(1-31 N N+1 Table 10-31 Heat-exchanger effectiveness relations. N=NTU= Flow geometry Double pipe: UA -min Parallel flow Counterflow Counterflon, C=1 C= Cin Cmax Relation 1-expl-N(1+C)I 1+C 1-expl-N(1-C1 1-Cexpl-N(1-31 N N+1