Water at 45C and 10kPa enters an adiabatic pump and is discharged at a pressure of 8600 kPa.The pump efficiency is 75%. Calculate the work for the pump, the temperature change of the water and the entropy change. For water at 45C: V = 1010 cm3/kg, β= 485*10(-6) K-1and Cp=4.178kJ/(kgK)

A counter flow heat exchanger has a line with 2 kg / s at 125 kPa, 1000 K entering and the air leaving at 100 kPa, 400 K. The other line has liquid water entering at 101.33 kPa, 20 ° C and leaving at 80 ° C. What is the mass flow of the water (° C) and the rate of heat transferred kW?

Separate streams of air and water flow through the compressor and heat exchanger arrangement shown below. Steady-state operating data is provided in the figure. Heat transfer with the environment can be neglected, as can all potential and kinetic energy effects. Air is modeled as an ideal gas. Determine: (a) the total power required by both compressors, in kW. (b) the mass flow rate of the water, in kg / s.

Consider an ideal gas which is being throttled to a pressure of 1 bar at a rate of 100 mol/s The initial pressure of the system is 25 bar. Given the temperature of the surrounding as 300 K. Calculate the following quantities (a) Rate of entropy generation Lost work