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1954-55 Theatre Catalog, 12th Edition, Page 375 (337)

1954-55 Theatre Catalog, 12th Edition
1954-55 Theatre Catalog
1954-55 Theatre Catalog, 12th Edition, Page 375
Page 375

1954-55 Theatre Catalog, 12th Edition, Page 375

Most air conditioning systems over 1 ton in capacity require large quantities of water for use in condensing the hot refrigerant gas in the air conditioning plant. If water is plentiful locally, this condensing water can be wasted to the drain. However, where cost or local restrictions on water use preclude this, evaporative condensers and cooling towers are available which recirculate as much as 95 per cent of it.

In the evaporative condenser, water passes over coils through which the hot refrigerant gas is flowing and air is blown upward counter to the fiow of the water. A small quantity of the water will be evaporated, extracting heat from the gas. The water not evaporated is recirculated and used again.

This equipment must be located close to the main plant to minimize refrigerant piping runs, In factory-assembled equipment, such as the usAIRco RK, described above, the evaporative condenser is an integral part of the plant. usAIRco Refrigerated Kooler-aire units are also available with water-cooled condensers which can be used where water is plentiful or in conjunction with a cooling tower as next described.

The cooling tower is used in place of the evaporative condenser when (1) there is a problem of disposmg 0f the hot air from the latter, or (2) there are several condensing units. In cooling tower systems, cool water, rather



than evaporating water, is passed over the condensing coils to remove heat from the refrigerant gas. After it has accomplished its purpose, the now warm water is pumped to the top of the cooling tower and sprayed or dripped through an air stream. A small portion of the water evaporates, cooling the rest, which is then ready for another condensing cycle. Again, the only makeup water is that which evaporates. The cooling tower must be placed outside the building.

Location of Equipment

and Duciwork

From the standpoint of economy and operational efficiency, the location of the equipment should be selected to minimize the length of supply and return ducts. As previously mentioned, it is also important that operating noise from the equipment not be audible in the main theatre area.

Where supply ducts carrying cool air are exposed to high temperatures, a condition that is particularly serious in attic spaces, the desirability of duct insulation should be investigated.

An Example

Striking evidence of the advances in modern theatre design is provided by

TERRACE Theatre. Robbinsdule. Minn, is cooled through circular ceiling diffusers and the return grilles can be seen in the rear ceiling.

the new air conditioned Terrace Theatre, recently completed at a cost of almost $1,000,000 as the major attraction in a suburban shopping center in Robbinsdale, Minnesota. (See 1952 THEATRE CATALOG, page 36.)

The theatre, on the top of a hill commanding dramatic views of Lake Crystal, in the "Land OiLakes" section of suburban Minneapolis, was erected by William and Sidney Volk, from plans by Liebenberg and Kaplan, architects and engineers, featuring a year-round air conditioning system utilizing United States Air Conditioning Corporation equipment and 52 degree well water.

The theatre is set back several hundred feet from the .two nearby traffic arteries, but passersby are attracted by roadside stone pylons and a huge pylon of brick and glass on the building itself. Its corner entranceway emphasizes twelve all-glass doors in two banks, leading to the lobby. A highlight of the foyer is an unusual copper "wishing well" drinking fountain.

Directly off the lobby, a luxurious sunken lounge is rimmed off by a low stone wall that encloses a tier of cushioned seats. The lounge features a copper-hooded fireplace and an array of colorful plant boxes. A dramatic blending of inside and outside treatment is achieved by the liberal use of cut stone, redwood and oak in the interior and by slanting window walls which provide
1954-55 Theatre Catalog, 12th Edition, Page 375