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David E. Pierce, Diamond Alkali Co.
Air Conditioning with Closed-Reversed Cycle The versatile heat pump removes heat from one place and delivers it where needed in another ingenious McFarlan application month's column discussed A. I. LationASTMcFarlan's use of staged refriger by means of which advantage
system rather than air in ducts, although it can be applied in the latter way if local conditions require. Large office buildings, such as the Amoco Building at 555 Fifth Avenue in New York City, mentioned last month, are making use of this method, as are industrial plants and shopping centers with large and small stores. The core of a large office building contains heat generating sources the year around—from people, electric lights, sometimes mechanical power-
economic basis than where electricity is relatively cheap. To continue the story, some other ways in which McFarlan has effected air conditioning economies in the addition and removal of heat, by what he calls the closed-reversed cycle, are given. In brief, the idea is to remove heat from one place and deliver it to another that can use it, smoothing out inequalities in demand by relatively small additions or subtractions of heat. Generally, the method uses water in a three-pipe
is taken of the increased efficiency, nonoverloading features, and in creased compressor capacity, that can be obtained by refrigerating the working fluid (air or water) in steps. By using several stages, those follow ing this method have been able to cut power consumption per over-all ton of refrigeration by 2 5 % or more. Where power is relatively expensive, more stages can be justified on an
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i, 2, 3, 4, 5 W a t e r cooler 6, 7, 8, 9 , 10 Condenser 11 Steam con verter 12 Steam valve, controlled b y end switch on any 3w a y valve 13, 14 Reverse cycle condenser 15 Typical low velocity system, all outside air 16 Typical high velocity system, all outside air 1 7 Typical low velocity system, recirculated air 18 Typical high velocity system, recirculated air 19 W i n d o w unit zone 20 Typical of other window unit zones 21 Cooling tower 22, 23 Riser (typical of other risers on same zone) A.V. Auto matic 3 - w a y valves
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