33. An open drive condensing unit has the following factory delivered options. • Compressor maximum speed 550 rpm • Compressor pulley size 600mm • Factory supplied motor pulley size 200mm • Motor speed rating 1400 rpm Pre-commissioning tests suggest that the suction pressure is too high, the system capacity is below requirement, and the compressor speed needs to be increased. Assuming that the motor has an adequate power rating to drive the compressor to its maximum speed, what size motor pulley would be required to increase the compressor speed by an additional 10%? All calculations can be rounded to the nearest unit of 10. All calculations are to be shown

33. An open drive condensing unit has the following factory delivered options. • Compressor maximum speed 550 rpm • Compressor pulley size 600mm • Factory supplied motor pulley size 200mm • Motor speed rating 1400 rpm Pre-commissioning tests suggest that the suction pressure is too high, the system capacity is below requirement, and the compressor speed needs to be increased. Assuming that the motor has an adequate power rating to drive the compressor to its maximum speed, what size motor pulley would be required to increase the compressor speed by an additional 10%? All calculations can be rounded to the nearest unit of 10. All calculations are to be shown

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

Chapter10: System Charging

Section: Chapter Questions

Problem 15RQ: A service technician is charging an air-conditioning system that has a TX V as the metering device...

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