HEAT TRANSFER FINAL (90 Points) 11.2.2022 1) (25 points) A double-pipe parallel-flow heat exchanger is to heat water (cp=4.18 kj/kg.K) at a rate of 0.2 kg/s. The heating is to be done by geothermal water (cp=4.31 kj/kg.K) available at 140C at a mass flow rate of 0.3 kg/s. The inner tube is thin walled and has a diameter of 0.8 cm. If the overall heat transfer coefficient of the heat exchanger is 550 W/m.K, a) determine exit temperature (Tout) of the geothermal water. b) Determine log mean temperature difference and c) determine the length of the tube required to achieve the desired heating. 60C Geothermal water 140C Water 25C