| 摘要 |
An air conditioning system and method wherein a central pumping system circulates a heat-exchange liquid, through heating and cooling paths of a refrigeration system to and from air-treating units, and to and from a fluid cooler which acts as a heat sink and also as a heat source. The air-treating units have fans or blowers positioned upstream of the air cooling coils so that the fan heat is discharged through the fluid cooler system during cooling load operation, and that heat is available in the air-treating units during heating-load operation. One embodiment includes a separate line for supplying neutral water to each air-treating unit. The neutral water is mixed with either the hot water or the cold water supplied to each treating unit for temperature control. Another embodiment has only hot and cold water with separate supply and return lines. The systems may also be designed and operated to utilize the heat pump principle to raise the temperature of the heat-exchange liquid flowing to the fluid cooler above the generally accepted level. The fluid cooler discharges heat during dominant cooling load conditions through air which is exhausted from the conditioned space. The condensate from the air-treating units is supplied to the fluid cooler and provides evaporative cooling. The fluid cooler is also a heat source during dominant heating load conditions, with the exhaust air and some outside air being the fluid. The invention contemplates that water from an outside source can be used as the "fluid" as the source of heat and as the heat sink.
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