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1954-55 Theatre Catalog, 12th Edition, Page 365 (327)

1954-55 Theatre Catalog, 12th Edition
1954-55 Theatre Catalog
1954-55 Theatre Catalog, 12th Edition, Page 365
Page 365

1954-55 Theatre Catalog, 12th Edition, Page 365


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smaller mechanical refrigeration apparatus than would be required for direct mechanical refrigeration air conditioning systems. The installed machinery makes ice during no load hours which is used to condition the space during peak load hours. In some applications the ice and machinery are used together during peak loads.

contained package type units are adaptable to many locations, either inside or outside the structure, at the rear of the house or at the side of stage, in basements or on the roof, and can supply air with or without ducts depending on their final location.

Peak Load Method

The Upeak load" method of application engineering may also be used to economical advantage in small outlying theatres and others running one matinee and one evening performance, or one performance per day. A well qualified

engineer should be engaged to engineer and supervise such applications.

Another Method

Another economical method of cooling theatres running one or two performances daily is the "latent heat ice storage" system. This method uses much

SKETCH showing how Westinghouse Unitaires may be utilized tor moderate-Sized theatres.


SEEN HERE is a typical Westinghoqu inspection

chart for air conditioning system maintenance.

The economical first cost of latent heat ice storage systems may be seen in the following example:

A theatre requires a total of 200 tons per hour for two hours. Total 400 ton hours or 4,800,000 BTU. The ice required to provide 4,800,000 BTU and to cool the space is produced over a certain number of shut-down hours.

For a direct cooling system the compressor(s) would have a capacity of 2,400,000 BTU/hr. or somewhat less if sized according to peak load require" ments.

If 10 hours were chosen as the ice recovery period in a latent heat ice storage system, then: 4,800,000/10 = 480,000 BTU/hr. required capacity of compressor, The difference in required capacity affords a substantial reduction in compressor first and operating cost even though ice tanks must also be installed.

Central Station

Where the construction of the theatre and its capacity require large central station type air conditioning apparatus located in a machinery room, many equipment variations may be used. Refrigeration machines are available in many ranges of capacity and are physically smaller than formerly. Compressors are equipped with capacity controllers which are actuated by means of house temperature. The compressor may be located in one space with the coils and fans above the ceiling, or on the roof, with ducts supplying the air to the theatre. Water towers or evaporative condensers are available to minimize operating costs.

Many excellent articles covering engineering applied to psychometry and apparatus selections have been presented in this publication. The exhibitor is advised to retain a competent heating and ventilating consulting engineer prior to opening negotiations for the air conditioning system to be installed. Thus you will be able to secure adequate apparatus for your needs in full compliance with local codes and regulations.

Recently many houses have undertaken the replacement of obsolescent air conditioning refrigeration apparatus, and have realized substantial savings in operating cost by elimination of the need for an operating engineer. Recent replacement installation in southwestern
1954-55 Theatre Catalog, 12th Edition, Page 365