A heat exchanger employs 1.5kg/s of a liquid whose specific heat is 5kJ/(kg K) at 15o C to cool 5kg/s of air from 120o C to 25o
C. The air pressure during this cooling process remains constant at 100kPa. The air leaving the heat exchanger enters an isentropic compressor where it is compressed to 1000kPa. Find the temperature of the air leaving the compressor. If the liquid leaves the heat exchanger at 20o C, how much is the external heat transfer rate to the ambient from the heat exchanger? What is the power required to drive the compressor? What is the irreversibility rate in the heat exchanger? Assume the ambient temperature to be 25o C and that air is an ideal gas with constant specific heats and use a value of 1.004kJ/(kg K) for Cp,o and 0.717kJ/(kg K) for Cv
1 answer:
You might be interested in
Answer:
Speed of the this part is given as
Also the direction of the velocity of the third part of plate is moving along 135 degree with respect to one part of the moving plate
Explanation:
As we know by the momentum conservation of the system
we will have
here we know that
the momentum of two parts are equal in magnitude but perpendicular to each other
so we will have
now from above equation we have
Also the direction of the velocity of the third part of plate is moving along 135 degree with respect to one part of the moving plate