In the last fifty years, several large office buildings and small college campuses have been constructed using water-to-water heat pumps. Their capacities were up to…
Category: Air Conditioning
The installation, maintenance, and operating efficiency of the heat pump system are like those of no other comfort system. A heat pump system requires the…
In a straight heat pump or supplementary electric heater application, at least one outdoor thermostat is required to cycle the heaters as the outdoor temperature…
During a defrost cycle, the heat pump switches from heating to cooling. To prevent cool air from being circulated when heating is needed, the control…
On mild temperature heating days, the heat pump handles all heating needs. When the outdoor temperature reaches the “balance point” of the home (heat loss…
A heat pump is a mechanical refrigeration system. It is arranged and controlled to utilize the condenser heat. The condenser heat is wasted or dissipated…
Figure 17-8 is a schematic diagram of an absorption cold generator. Note that the evaporator, absorber, concentrator, and condenser are enclosed in a single casing.…
When the thermostat is set for heating, the chilled water pump is off. The pressure from the hot water pump moves the check ball to…
When the thermostat calls for cooling, the hot water pump is off. The chilled water pump moves water from the chiller tank and pumps it…
Some gas-fired units furnish cooling for the summer and heat for the winter. The user changes the functions simply by changing the settings of a…