What would be the necessary bore and stroke of a single acting four- cylinder, 350 rpm ammonia compressor working on simple saturation cycle between 35°C condenser and –15°C evaporator temperatures and developing 15 tons refrigeration. Given for the compressor: Ratio of stroke to bore = 1 Volumetric efficiency = 0.7

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
Chapter26: Applications Of Refrigeration Systems
Section: Chapter Questions
Problem 9RQ: Three disadvantages of parallel compressor systems are _____, _____, and ____.
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(a) What would be the necessary bore and stroke of a single acting four-
cylinder, 350 rpm ammonia compressor working on simple saturation
cycle between 35°C condenser and -15°C evaporator temperatures and
developing 15 tons refrigeration. Given for the compressor:
Ratio of stroke to bore = 1
Volumetric efficiency = 0.7
(b) If the index of compression is 1.15, find the error introduced in calculat-
ing the work of compression by assuming the process to be isentropic.
Also, find the heat rejected to the compressor-jacket cooling water.
Transcribed Image Text:(a) What would be the necessary bore and stroke of a single acting four- cylinder, 350 rpm ammonia compressor working on simple saturation cycle between 35°C condenser and -15°C evaporator temperatures and developing 15 tons refrigeration. Given for the compressor: Ratio of stroke to bore = 1 Volumetric efficiency = 0.7 (b) If the index of compression is 1.15, find the error introduced in calculat- ing the work of compression by assuming the process to be isentropic. Also, find the heat rejected to the compressor-jacket cooling water.
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