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A circulator pump or circulating pump is a specific type of pump used to circulate gases, liquids, or slurries in a closed circuit with small elevation changes. They are commonly found circulating water in a hydronic heating or cooling system.
These types of pumps are used primarily in heating and air conditioning systems within both residential and commercial buildings such as offices and apartment complexes. The pump is the central component of these systems and accounts for most of the electricity usage within the system, making its design key to an increase in efficiency and ...
On-demand recirculating pumps are often used to minimize hot water wait times from tankless water heaters and save water being wasted down the drain. On-demand recirculating pumps are activated by push-button or other sensor. A water contacting temperature probe installed at the hot water usage point signals the pump to stop.
The pump must be beneath the steam drum to take advantage of the pressure due to the height of the water. If the pump was not there; when it reaches the steam separator and water returns to the pump, the pressure may become low enough in the eye of the impeller to cause cavitation and subsequent damage.
Electric heating can either be purely resistance-type heating or make use of a heat pump system to take advantage of low-grade heat in the air or ground. A district heating system uses centrally located boilers or water heaters and circulates heat energy to individual customers by circulating hot water or steam. This has the advantage of a ...
DX system being drilled in the 1980s. A direct exchange (DX) geothermal heat pump is a type of ground source heat pump in which refrigerant circulates through copper tubing placed in the ground unlike other ground source heat pumps where refrigerant is restricted to the heat pump itself with a secondary loop in the ground filled with a mixture of water and anti-freeze.
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