Question 5.8: Hot water at a temperature of 95 °C and a pressure of 100 kP...
Hot water at a temperature of 95 °C and a pressure of 100 kPa flows in a pipe at a flow rate of 1 kg/s, as shown in Figure 5.10. The pipe loses heat at a rate of 1 kW per meter along the pipe length. (a) Write the mass, energy, entropy, and exergy balance equations, (b) find the temperature of the water leaving the pipe after 100 m of pipe length, and (c) calculate thermal exergy loss, rate entropy generation rate, and exergy destruction rate. Take the pipe surface temperature as 60 °C and reference temperature (i.e. surroundings temperature) as 25 °C.
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