15 deg C 0.5 kg /s 90 deg C 60 deg C 10 deg C A parallel-flow double-pipe heat exchanger with a thin-walled inner tube i
Posted: Fri May 27, 2022 7:12 am
15 deg C 0.5 kg /s 90 deg C 60 deg C 10 deg C A parallel-flow double-pipe heat exchanger with a thin-walled inner tube is used to cool down water from 90°C to 60°C at a rate of 0.5 kg/s. The cold-water flowing on the outer pipe has a temperature of 10 °C at the inlet and 15 °C at the outlet. (Water thermal properties could be assumed as constant.) [15] a) Calculate the cold-water mass flow rate. [25] b) Calculate the overall heat transfer coefficient if the length of the inner tube is 20 m and the inner tube diameter is 2 cm.