Water is heated from 30C to 90C I a counterflow double-pipe heat exchanger. Water flows at the rate of 1.2 kg/s. The heating is accomplished by a geothemal fluid which enters the heat exchanger at 160C at a mass flow rate of 2 kg's. The inner tube is thin-walled and has a diameter of 15 mm. If the overall heat transfer coefficient of the heat exchanger is 600 W(m" C ), determine the following using the NTU-Effectiveness method: PHT : BCHE February 2022 CONFIDENTIAL 5/8 (a) Heat capacity rates of hot and cold fluids. (b) Identify Cmin. (c) Heat capacity rate ratios. (2 marks) (2 marks) (2 marks) (d) The rate of heat transfer in the heat exchanger. (3 marks) (e) Effectiveness of heat exchanger. (3 marks) () Number of transfer units. (3 marks) (e) Surface area of heat exchanger. (3 marks) (h) The length of the heat exchanger required. (2 marks)