Question

Steam enters a counterflow heat exchanger operating at steady state at 0.07 MPa with a quality of 0.9 and exits at the same pressure as saturated liquid. The steam mass flow rate is 1.5 kg/min. A separate stream of air with a mass flow rate of 100 kg/min enters at 30°C and exits at 60°C. The ideal gas model with 1.005 kJ/kg · K can be assumed for air. Kinetic and potential energy effects are negligible. Determine the temperature of the entering steam, in °C, and for the overall heat exchanger as the control volume, what is the rate of heat transfer, in kW.

Answer 1

1.12kw is the heat transfer

Step-by-step explanation:

Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force.

Potential energy, stored energy that depends upon the relative position of various parts of a system.

See attachment for the step by step solution.