Question

1. (a) Draw a schematic of theoretical wet-vapor (e.g. liquid refrigerant and vapor mixture) Carnot Refrigeration cycle going through four key components (or devices) through an open system with its respective energy source and sink. (b) Following the class note’s format, label and explain each process (e.g. isobaric evaporation) and its association with work (e.g., W =0) and heat (e.g., Qin). (If there is no work or heat, must indicate so.) (c) Plot the cycles on P-v and T-s diagrams respectively. (d)Determine the coefficient of performance for the refrigeration and heat pump, respectively in terms of two forms: (i) heat and/or work, and (ii) only temperatures. (e) Explain two common modifications made to make the Carnot Refrigeration more practical in the real world.

Answer 1