Hot and cold fluids enter a parallel flow double t ube heat exchanger at 100 C and 15 C, respectively. The heat capacity rates of hot and cold fluids are Ch = 2000 W/K and Cc = 1200 W/ K, respectively. If the outlet temperature of the cold fluid is 45 C, the log mean temperature difference (LMTD) of the heat exchanger is _____ K (round off to two decimal places).

Hot and cold fluids enter a parallel flow double t ube heat exchanger

1.	Hot and cold fluids enter a parallel flow double t ube heat exchanger at 100 C and 15 C, respectively. The heat capacity rates of hot and cold fluids are C_h = 2000 W/K and C_c = 1200 W/ K, respectively. If the outlet temperature of the cold fluid is 45 C, the log mean temperature difference (LMTD) of the heat exchanger is _____ K (round off to two decimal places).
A.	5.771 C or K
B.	517.71 C or K
C.	157.71 C or K
D.	57.71 C or K
Answer» E.

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