The West Philadelphia Enterprise Center makes use of a geothermal heat pump method for far more than 31,000 square feet of space.
A geothermal system maintains the household at a continuous temperature, eliminating the frequent heating/cooling cycles as experienced with forced air furnaces and split air conditioning systems. Moreover, most folks understand considerable savings on utilities, which more than time much more than compensate for the expense of the system. You will encounter a lot more comfort with less operating cost.
A variation of the pump-and-dump sytem, which is also allowed in Minnesota, is 1 which pumps water straight from a lake or substantial pond then dumps it directly back for the duration of GHP heating and cooling operation. Nevertheless, lake water top quality and, far more specifically, cold winter water temperatures impose some limitations on such applications in the northern climate.
Actual installation circumstances could generate greater or worse efficiency than the typical test conditions. COP improves with a reduced temperature difference between the input and output of the heat pump, so the stability of ground temperatures is critical. If the loop field or water pump is undersized, the addition or removal of heat might push the ground temperature beyond typical test conditions, and functionality will be degraded. Similarly, an undersized blower may well allow the plenum coil to overheat and degrade efficiency.
But an indoor unit in its sealed chamber has none of these difficulties. As a outcome, the oldest models have been in spot for 20 years and they seem to stay efficient with age. This may explain a regularly noted disparity involving lab-certified efficiency ratings and field functionality. In side-by-side tests comparing ground-supply heat pumps to conventional heat pumps and air conditioners, the latter units progressively shed ground. In all likelihood, the distinction is the atmosphere they’re installed in.