Refrigeration – Processes – Accumulating holdover ice in situ
Patent
1991-01-17
1993-01-26
Tapolcai, William E.
Refrigeration
Processes
Accumulating holdover ice in situ
621761, 62 93, F25D 1706
Patent
active
051813874
ABSTRACT:
Air conditioning apparatus is disclosed. The apparatus includes a plurality of air outlets, refrigeration apparatus operable to make ice by pumping heat from water to a heat sink and to store the ice, a coil for dehumidifying outside air or a mixture of outside air and return air, means for causing air to be dehumidified to flow in heat transfer relationship with the coil, means for circulating dehumidified air to the air outlets, means operable to control the moisture content and temperature of the dehumidified air, means operable to control the rates at which dehumidified air is delivered by the air outlets to the spaces they serve to ones not less than the predetermined minimum rate, and means for controlling the temperature of the air delivered to the air outlets to maintain the temperature of the spaces within control limits. Each of the air outlets is operable to deliver air to a space to be conditioned. The apparatus also includes means for circulating a low temperature heat transfer fluid through the coil, the circulating means including means for transferring heat from the heat transfer fluid to ice made and stored by the means operable to make and store ice. The apparatus is operable to deliver air to the outlets at a rate per unit of area in the spaces served by the air outlets which varies between a predetermined minimum rate greater than zero and a maximum rate, the maximum rate being substantially less than that which would be required to maintain the design temperature in each of the spaces at the maximum design cooling load with air supplied to the space at a dry bulb temperature of 55.degree. F. The transfer of heat from the coil is controlled so that the dehumidified air is incapable, at the rate at which it is required for humidity control, of maintaining the desired space temperature at the maximum design cooling load. In a preferred embodiment, the means for controlling the temperature of the air delivered to the air outlets includes means for transferring heat from air that has not yet flowed in heat transfer relationship with the coil to air that has flowed in heat transfer relationship with the coil.
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Purdue David C.
Purdue John C.
Tapolcai William E.
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