(9) A refrigerant 22 refrigeration system carries a load of 82 kW at an evaporator pressure of 354 kPa and a condenser pressure of 1460 kPa. The liquid refrigerant is subcooled by 4 degrees before entering the expansion valve and the vapor is superheated by 5 degrees before entering the compressor. The compressor operates at 28 r/s. The stroke-to-bore ratio of the twin-cylinder compressor is 1.20 and the actual volumetric efficiency is 82 per cent. Determine (a) mass flow rate of refrigerant, (b) mass flow rate of cooling water in the condenser for a 7-degree change in temperature, and (c) the bore and stroke. Ans. (a) 0.5025 kg/s, (b) 3.43 kg/s, (c) 9.2 x 11 cm
(9) A refrigerant 22 refrigeration system carries a load of 82 kW at an evaporator pressure of 354 kPa and a condenser pressure of 1460 kPa. The liquid refrigerant is subcooled by 4 degrees before entering the expansion valve and the vapor is superheated by 5 degrees before entering the compressor. The compressor operates at 28 r/s. The stroke-to-bore ratio of the twin-cylinder compressor is 1.20 and the actual volumetric efficiency is 82 per cent. Determine (a) mass flow rate of refrigerant, (b) mass flow rate of cooling water in the condenser for a 7-degree change in temperature, and (c) the bore and stroke. Ans. (a) 0.5025 kg/s, (b) 3.43 kg/s, (c) 9.2 x 11 cm
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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Transcribed Image Text:(9) A refrigerant 22 refrigeration system carries a load of
82 kW at an evaporator pressure of 354 kPa and a condenser
pressure of 1460 kPa. The liquid refrigerant is subcooled by 4
degrees before entering the expansion valve and the vapor is
superheated by 5 degrees before entering the compressor. The
compressor operates at 28 r/s. The stroke-to-bore ratio of the
twin-cylinder compressor is 1.20 and the actual volumetric
efficiency is 82 per cent. Determine (a) mass flow rate of
refrigerant, (b) mass flow rate of cooling water in the condenser
for a 7-degree change in temperature, and (c) the bore and stroke.
Ans. (a) 0.5025 kg/s, (b) 3.43 kg/s, (c) 9.2 x 11 cm
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