A two-stage ammonia food-freezing plant – with a desired capacity of 528,000 kJ/h at -40℃ evaporating temperature and 35C condensing temperature – has a flash intercooling system with a liquid sub cooler. The vapour leaving the evaporator is at -30℃ and entering the first stage compressor is at -15℃. The vapour leaving the flash chamber is superheated by 10
A two-stage ammonia food-freezing plant – with a desired capacity of 528,000 kJ/h at -40℃ evaporating temperature and 35C condensing temperature – has a flash intercooling system with a liquid sub cooler. The vapour leaving the evaporator is at -30℃ and entering the first stage compressor is at -15℃. The vapour leaving the flash chamber is superheated by 10
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A two-stage ammonia food-freezing plant – with a desired capacity of 528,000 kJ/h at -40℃ evaporating temperature and 35C condensing temperature – has a flash intercooling system with a liquid sub cooler. The vapour leaving the evaporator is at -30℃ and entering the first stage compressor is at -15℃. The vapour leaving the flash chamber is superheated by 10℃ in the suction line to the second stage compressor. Water intercooling is done to cool the vapour to 45℃. Adiabatic efficiencies of both compressors are 0.65 and 0.77 respectively. Find the piston displacements, discharge temperatures and power requirements of the two compressors.
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