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Arts, 09.07.2019 12:00, anggar20

Which compressor type is usually sized below 5 tons of cooling capacity

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Engineering, 07.08.2019 17:10, vava1804

Air is compressed from 100 kpa and 15? to a pressure of 1000 kpa while being cooled at a rate of 20 kj/kg by circulating water through the compressor casing. the volume flow rate of the air at the inlet conditions is 140 m/min, and the power input to the compressor is 520 kw determine the mass flow rate of the air and the temperature at the compressor exit. also reconsider the problem using it software, investigate the effect of the rate of cooling of the compressor on the exit temperature of air. let the cooling rate vary from 0 to 200 kj/kg. plot the air temperature against the rate of cooling, and discuss the results.

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Engineering, 20.08.2019 23:20, mariehayes099

Arefrigeration plant operates in pretoria on refrigerant r134a at an evaporator pressure of 105 kpa (gauge) and a condensing pressure of 920 kpa (gauge). there is a sub-cooling of 3 k with a superheat of the gas entering the compressor of 8 k. the compressor is a four-cylinder reciprocating compressor with a bore of 67 mm and a stroke of 57 mm with an estimated capacity of 35 kw. the compressor is directly coupled to an electric motor running at 1470 rev/min and a power consumption of 19,5 kw. calculate: (a) the clearance volume efficiency if the compressor clearance is 3,6 %; (b) the actual volumetric efficiency; (c) the compression efficiency when the mechanical efficiency is 85% and the motor efficiency 90%.

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Engineering, 23.08.2019 01:30, mirandac9394

Arefrigeration plant operates in pretoria on refrigerant r134a at an evaporator pressure of 105kpa (gauge) and a condensing pressure of 920 kpa (gauge). there is a sub-cooling of 3k with a superheat of the gas entering the compressor of 8k. the compressor is a four-cylinder reciprocating compressor with a bore of 67mm and a stroke of 57mm with an estimated capacity of 35kw. the compressor is directly coupled to an electric motor running at 1470rev/min and a power consumption of 19,5 kw. calculate: 1. the clearance volume efficiency if the compressor clearance is 3,6% 2. the actual volumetric efficiency 3. the compression efficiency when the mechanical efficiency is 85% and the motor efficiency 90%.

Answers: 1

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Engineering, 24.08.2019 02:10, emilyplays474

Arefrigeration plant operates in pretoria on refrigerant r134a at an evaporator pressure of 105 kpa (gauge) and a condensing pressure of 920 kpa (gauge). there is a sub-cooling of 3 k with a superheat of the gas entering the compressor of 8 k. the compressor is a four-cylinder reciprocating compressor with a bore of 67 mm and a stroke of 57 mm with an estimated capacity of 35 kw. the compressor is directly coupled to an electric motor running at 1470 rev/min and a power consumption of 19,5 kw. calculate: (a) the clearance volume efficiency if the compressor clearance is 3,6 %; (b) the actual volumetric efficiency; (c) the compression efficiency when the mechanical efficiency is 85% and the motor efficiency 90%.

Answers: 3

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