An air cycle refrigeration plant operates with a centrifugal compressor and an air turbine- mounted coaxially such that the power output from the turbine contributes to the power required to drive the compressor. The temperature of the air at the compressor inlet is 15°C and the pressure ratio is 2.5. The air during its passage from the compressor to the turbine passes through an intercooler and enters the turbine at 40°C. The cold space temperature is required to be maintained at 15°C. Taking the isentropic efficiency of bot compressor and turbine to be 84% and the mechanical efficiency of the turbine- compressor drive as 90%, calculate the following:

An air cycle refrigeration plant operates with a centrifugal compressor and an air turbine- mounted coaxially such that the power output from the turbine contributes to the power required to drive the compressor. The temperature of the air at the compressor inlet is 15°C and the pressure ratio is 2.5. The air during its passage from the compressor to the turbine passes through an intercooler and enters the turbine at 40°C. The cold space temperature is required to be maintained at 15°C. Taking the isentropic efficiency of bot compressor and turbine to be 84% and the mechanical efficiency of the turbine- compressor drive as 90%, calculate the following:

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter36: Refrigeration Applied To Air-conditioning

Section: Chapter Questions

Problem 9RQ: What are higher-efficiency refrigerant blends that can be used as long-term replacements for R-22 in...

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What are higher-efficiency refrigerant blends that can be used as long-term replacements for R-22 in residential and light-commercial air-conditioning applications?
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