PROBLEM 1: A 20-ton vapor compression refrigeration system is to evaporate R-12 at -20°C and to condense it at 40°C. The vertical compressor is to run at 10000 rpm; it is single acting, has the bore equal to the stroke, and has 5% clearance. Vapor enters the compressor at -10°C and liquid enters the expansion valve at 30°C. 1.1 What refrigeration flow rate is required? 1.2 What would be the bore and stroke of the compressor? 1.3 What power is required by the compressor? 1.4 What is the quantity of the cooling water required in the condenser for a 8-degree increase in temperature?

PROBLEM 1: A 20-ton vapor compression refrigeration system is to evaporate R-12 at -20°C and to condense it at 40°C. The vertical compressor is to run at 10000 rpm; it is single acting, has the bore equal to the stroke, and has 5% clearance. Vapor enters the compressor at -10°C and liquid enters the expansion valve at 30°C. 1.1 What refrigeration flow rate is required? 1.2 What would be the bore and stroke of the compressor? 1.3 What power is required by the compressor? 1.4 What is the quantity of the cooling water required in the condenser for a 8-degree increase in temperature?

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

Chapter22: Condensers

Section: Chapter Questions

Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...

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