ASHRAE Journal - February 2010 - 42

ASHRAE59–2009 YE A R S JOURNAL Improved Zoning By A. I. MCfARLAN, fELLOw ASHRAE n improvement which should receive more consideration in department store air conditioning is zoning. Part of the complication in the air conditioning of large office buildings can be traced to the peripheral system. Costs involving double fans, elaborate dampers, and in many cases long, high-pressure duct systems are chargeable to cooling the interior area while the exterior is being heated. But peripheral office building zoning can be greatly improved, with savings in building and air conditioning equipment. Betters Department Store Air Conditioning REpRINtEd fROM ASHRAE JOURNAL, dECEMBER 1959 Designer of the air conditioning installation for the Sibley Department Store in Rochester, N.Y., the author discusses how to improve antiquated and inefficient zoning by the use of the Closed and Staged Cycle which was used at Sibley’s and includes one system for heating and cooling. Also discussed are the staging of compressors for reduction of hp in air conditioning systems, the Closed Cycle heat pump to transfer heat within a project and volumatic control. Department stores are zoned on the basis of overall floors, or combination of floors, frequently without regard to interior and exterior spaces or simultaneous heating and cooling requirements. Drawings for a proposed department store displayed an air conditioning unit to be located in each of four corners of three floors; one floor largely below ground, a ground floor, and the top floor under a roof. A large part of the air from each unit was delivered to interior areas, but the drawings showed air leaving the main coil at the same temperature for interior and exterior areas. In some cases, this air went to fitting rooms around the exterior, and in other cases to offices, both of which must be heated while interior sales areas must simultaneously be cooled. There were reheat coils in the branches from the main airstream to the fitting rooms and offices, which meant that during the heating season air was cooled to a temperature which would satisfy the interior sales space, and then part of the air bled off to heat the chilled air through reheat coils in order to heat the exterior offices and fitting rooms. The heated air had to be recooled before being reheated as it went through its cycle. A. I. McFArlAn, Fellow ASHrAe A. I. Mcfarlan graduated from Lehigh University in 1926 with a degree in mechanical engineering. from 1926 to 1940 he worked at york International. In 1940, he became the vice president of Kerby Saunders of New york City, where he remained until 1945. during world war ll, Mcfarlan worked on the Manhattan project for the United States government. Mcfarlan was the president of A. I. Mcfarlan Company, a 42 ASHRAE Journal design-build air-conditioning construction company he founded in 1945 in New york City. He moved the company to Springfield, N.J., in 1968 and finally settled in westfield, N.J., in 1976. He was president of the New york City Chapter of the American Society of Refrigerating Engineers from 1949 – 1950, and served on technical committees 6.2 and 9.4. He received more than 50 patents in air-conditioning and heat recovery applications. Mcfarlan retired from his company in 1993. He died in August 1995 at the age of 92. a s h r a e. o rg Fe b r u a r y 2 0 1

ASHRAE Journal - February 2010

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