The heat exchanger consists of 160 double pass tubes of 1 cm in diameter. The manual...

 

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The heat exchanger consists of 160 double pass tubes of 1 cm in diameter. The manual for the heat exchanger states an area density of 250 m2/m³. Your problem involves heating up water using exhaust heat waste from a neighbouring electric generator. If the cold water enters at a flow rate of 5 kg/s, the hot exhaust enters at around 300 C with a flowrate of 0.2 kg/s (Properties of air at 1 atm can be used here). Use an overall heat transfer coefficient of 240 W/m2.K 1. (5%) Find the outlet temperatures of both the water and the gas? 2. (10%) Calculate the convection heat transfer coefficient of the water using: Nuo = 0.022 Re,4/5 Pr2/5 The heat exchanger consists of 160 double pass tubes of 1 cm in diameter. The manual for the heat exchanger states an area density of 250 m2/m³. Your problem involves heating up water using exhaust heat waste from a neighbouring electric generator. If the cold water enters at a flow rate of 5 kg/s, the hot exhaust enters at around 300 C with a flowrate of 0.2 kg/s (Properties of air at 1 atm can be used here). Use an overall heat transfer coefficient of 240 W/m2.K 1. (5%) Find the outlet temperatures of both the water and the gas? 2. (10%) Calculate the convection heat transfer coefficient of the water using: Nuo = 0.022 Re,4/5 Pr2/5