Hello, I am having a hard time understanding the steps in solving question 9.10 from the "Introduction to Chemical Engineering Thermodynamics" 8th edition textbook. I've read your posted solution but...

Hello,

I am having a hard time understanding the steps in solving question 9.10 from the "Introduction to Chemical Engineering Thermodynamics" 8th edition textbook. I've read your posted solution but I am still not understanding finding the enthalpy at 3' and H'₃.

This is the question:

A vapor-compression refrigeration system operates on the cycle of Fig. 9.1. The refrigerant is water. Given that the evaporation T = 4°C, the condensation T = 34°C, η(compressor) = 0.76, and the refrigeration rate = 1200 kJ⋅s−1, determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle, and the coefficient of performance of a Carnot refrigeration cycle operating between the same temperature levels.

Attached is a copy of Figure 9.1 for reference.

Thank you for your help,

Cristina

Extracted text: 4 Condenser T Throttle Compressor valve Evaporator Figure 9.1: Vapor-compression refrigeration cycle.