The exhaust gases from a gas turbine are used to heat water in an adiabatic counter flow heat exchanger. The gases are cooled from 270 to 140°C, while water enters at 65°C. The flow rates of the gas and water are 0.38 kg/s and 0.50 kg/s respectively. The constant pressure specific heats for the gas and water are 1.09 and 4.186 kJ/kg K respectively. Calculate the rate of exergy loss due to heat transfer. Take T0 = 35°C.
Answers
Answered by
0
Answer:
formula =c-f 5/9×35c try it
Answered by
0
Answer:
11.9kW
Explanation:
Since it is a heat exchanger, the temperature of the gas will reduce as it's cooled and the temperature of the water will increase as the heat is transferred from the gases to the water. Performing a simple energy balance,
we get final water temperature as 92.705°C.
Exergy transfer rate, can be calculated using the formula
where T0 is the ambient surrounding temperature.
calculate the X value for both gas and liquid using the above formula and find the difference between the two values which comes out to be around 11.9kW
which is the exergy lost during heat transfer.
Similar questions