In a parallel-flow heat exchanger, the inlet and exit temperatures of the hot fluid are 80 ?C and 40 ?C respectively and the cold fluid enters the heat exchanger at the temperature if 10 ?C. If the relative thermal capacity (Cmin/Cmax) in the heat exchanger is 0.6, calculate the effectiveness of the heat exchanger.Answer A.It is not possible to calculate the effectiveness in this case, because the cold fluid exit temperature has not been provided B.1 C.0.57 D.0.73
E = Ch/Cmin * [(Tin - Tout)/(Tin - tin)] assuming Ch = Cmin Cc = Cmax E = 1 * [(80-40)/(80-10)] = 0.57
