hot exhaust gases of a stationary diesel engine are to be used to generate steam in an evaporater exhaust gases cp=1052j/kg°c enter the heat exchanger at 550°c at a rate of 0.25kg/s while water enters as saturated liquid evaporated at 200°c hgf =1941kj/kg.the heat exchanger based on water side is 0.5m^2 and overall heat transfer coefficient 8s 1780 w/m^2 °c determine the rate of heat transfer the exit temperature of exhaust gases and rate of evaporation of water?
Answers
Answer:
Hot exhaust gases of a stationary diesel engine are to be used to generate steam in an evaporator. Exhaust gases (cp = 1051 J/kg⋅K) enter the heat exchanger at 550°C at a rate of 0.25 kg/s while water enters as saturated liquid and evaporates at 200°C (hfg = 1941 kJ/kg). The heat transfer surface area of the heat exchanger based on water side is 0.5 m2 and overall heat transfer coefficient is 1780 W/m2⋅K. Determine the rate of heat transfer, the exit temperature of exhaust gases, and the rate of evaporation of water.
0
Hot exhaust gases of a stationary diesel engine are to be used to generate steam in an evaporator. Exhaust gases (cp = 1051 J/kg⋅K) enter the heat exchanger at 550°C at a rate of 0.25 kg/s while water enters as saturated liquid and evaporates at 200°C (hfg = 1941 kJ/kg). The heat transfer surface area of the heat exchanger based on water side is 0.5 m2 and overall heat transfer coefficient is 1780 W/m2⋅K. Determine the rate of heat transfer, the exit temperature of exhaust gases, and the rate of evaporation of water.
Answer:
Step 1 of 6
Given
The specific heat of exhaust gases,
The heat of vaporization of exhaust gases is
Mass flow rate of exhaust gases
Heat transfer surface area based on water side,
Overall heat transfer coefficient
Inlet temperature of exhaust gases,
Temperature of evaporator liquid,
Explanation: