ASHRAE Journal - July 2009 - 42

ASHRAE 19 50 59–2009 YE A R S JOURNAL System Design for Compressor Reliability BY MILTON W. GARLAND, P.E., FELLOW ASHRAE REPRINTED FROM ASHRAE JOURNAL, FEBRUARY 1974 (Fig. 1). The pan is illustrated as about 1/3 full and as having, at the left side, a float device attached for the purpose of maintaining a predetermined level. Heat applied to the bottom of the pan causes the water to boil, and the resulting vapor release causes an increase in the overall volume and a rise of the surface level. However, the weight of the water and vapor has not changed and excessive heat under the bottom will cause the This paper examines the evaporation of a refrigerant in various types of heat transfer structures by (a) relating refrigerant evaporation to control with load changes; (b) evaluating the effect of large volume increases at low temperatures; and (c) reviewing specific examples of compressor damage and the corrections made. he compressor is a vapor pump and must have, as a part of the system, foolproof means for protection against damage from hydraulics such as liquid refrigerant or oil. Positive displacement compressors for refrigeration service are designed for pumping a refrigerant vapor at a temperature above 10°F above the satura- T tion temperature at the compressor inlet pressure. But only a correctly designed evaporation system, adequately controlled for all load changes, will provide the required inlet conditions. CONTROL LIMITATION Control limitation may be compared to a pan of water on a stove MILTON W. GARLAND, P.E., FELLOW ASHRAE MILTON W. GARLAND, P.E., was honored in 1998 as the nation’s oldest worker, having begun his career in 1920 at the Frick Co., now part of York/Johnson Controls. He was known as “Mr. Refrigeration” for his work in refrigeration systems for gold mines in South Africa and in the ice cream factories of Philadelphia. Mr. Garland held some 40 patents of refrigeration-related items, ranging from icemakers to screw compressor volume controls. His work in refrigeration aided in the construction of the Hoover Dam for which he designed systems to cool the water, sand and rock used to make the concrete to build it. At ASHRAE’s Centennial Meeting in 1995, Mr. Garland was recognized as a pioneer in technology. In 1989, ASHRAE endowed an award in his honor—the Milton W. Garland 42 ASHRAE Journal Commemorative Refrigeration Award for Project Excellence, which recognizes the designer and owner of a non-comfort cooling refrigeration application that highlights innovation and/ or new technologies. He was also a member of several SPCs and SSPCs. He was a recipient of the ASHRAE F. Paul Anderson Award, the Distinguished 50-Year Member Award and the Louise and Bill Holladay Distinguished Fellow Award. In 1996, he received the first Andy Ammonia Award from the International Institute of Ammonia Refrigeration for his paper, The Influence of Vapor Pressure in the Condensing Process of the Ammonia Refrigeration Cycle. Garland died in July 2000 at age 104. He was inducted into the ASHRAE Hall of Fame at the Society’s 2003 Winter Meeting. a s h r a e. o rg July 2009

ASHRAE Journal - July 2009

Table of Contents for the Digital Edition of ASHRAE Journal - July 2009

ASHRAE Journal - July 2009
Contents
Commentary
Industry News
Letters
Meetings and Shows
Feature Articles
     Using Direct Evaporative and Chilled Water Cooling
     Solving Kitchen Ventilation Problems
     Case Against Balancing Valves
     Integrated Design and UFAD
     Anniversary Feature: System Design for Compressor Reliability
Building Sciences
     Sustainable Products Capabilities
Special Products Information Section
Emerging Technologies
Washington Report
Products
People
Special Products
Classified Advertising
Advertisers Index
ASHRAE Journal - July 2009 - ASHRAE Journal - July 2009
ASHRAE Journal - July 2009 - Cover2
ASHRAE Journal - July 2009 - 1
ASHRAE Journal - July 2009 - 2
ASHRAE Journal - July 2009 - Contents
ASHRAE Journal - July 2009 - 4
ASHRAE Journal - July 2009 - Commentary
ASHRAE Journal - July 2009 - Industry News
ASHRAE Journal - July 2009 - 7
ASHRAE Journal - July 2009 - Letters
ASHRAE Journal - July 2009 - 9
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ASHRAE Journal - July 2009 - 13
ASHRAE Journal - July 2009 - Meetings and Shows
ASHRAE Journal - July 2009 - 15
ASHRAE Journal - July 2009 -      Using Direct Evaporative and Chilled Water Cooling
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ASHRAE Journal - July 2009 - 19
ASHRAE Journal - July 2009 -      Solving Kitchen Ventilation Problems
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ASHRAE Journal - July 2009 -      Case Against Balancing Valves
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ASHRAE Journal - July 2009 - 29
ASHRAE Journal - July 2009 -      Integrated Design and UFAD
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ASHRAE Journal - July 2009 -      Anniversary Feature: System Design for Compressor Reliability
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ASHRAE Journal - July 2009 - Building Sciences
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ASHRAE Journal - July 2009 - Special Products Information Section
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ASHRAE Journal - July 2009 - Emerging Technologies
ASHRAE Journal - July 2009 - 105
ASHRAE Journal - July 2009 - 106
ASHRAE Journal - July 2009 - 107
ASHRAE Journal - July 2009 - Washington Report
ASHRAE Journal - July 2009 - Products
ASHRAE Journal - July 2009 - People
ASHRAE Journal - July 2009 - 111
ASHRAE Journal - July 2009 - Special Products
ASHRAE Journal - July 2009 - 113
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ASHRAE Journal - July 2009 - 116
ASHRAE Journal - July 2009 - Classified Advertising
ASHRAE Journal - July 2009 - 118
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ASHRAE Journal - July 2009 - Advertisers Index
ASHRAE Journal - July 2009 - Cover3
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