Question

A heat exchanger uses saturated steam at 375 K to heat cold water entering at 280 K and leaving at 301 K only the latent heat of vaporization is removed from the steam. i.e. the steam is condensed and saturated water exit the exchanger. a) what is the LMTD for a counter current heat exchanger? b) what is the LMTD for a parallel or cocurrent heat exchanger? c) if the counter current heat exchanger has a duty (Q) of 81000 kJ/hour and an overall heat transfer of coefficient (U) of 500 KJ/m^2K what is the calculated heat transfer area in m^2? d)  if the parallel or cocurrent heat exchanger has a duty (Q) of 81000 kJ/hour and an overall heat transfer of coefficient (U) of 500 KJ/m^2K what is the calculated heat transfer area in m^2?

Answer 1