Wednesday, January 7, 2015

Extracting Heat From Cold Air

Heat pumps come in 2 varieties air source and ground source. Air source heat pumps likewise utilize systems with a fan on the interior heat exchanger to blow warm air in. In a heat pump the outside world is cooled down and the heat is pumped into the inside.



A qualified heating contractor from Toronto can help decide on the best decision for your situation.


Heat pumps are used to provide heating due to the fact that less high grade energy is needed for their operation than appears in the launched heat. The majority of the energy for heating originates from the external environment, and only a portion originates from electricity (or some other high grade energy source required to run a compressor). In electrically powered heat pumps, the heat moved can be 3 or four times bigger than the electrical power consumed, providing the system a coefficient of efficiency (COP) of 3 or 4, as opposed to a COP of 1 of a conventional electrical resistance heater, in which all heat is produced from input electrical energy.

Heat pumps utilize a refrigerant as an intermediate fluid to soak up heat where it vaporizes, in the evaporator, and then to launch heat where the refrigerant condenses, in the condenser. The refrigerant flows with insulated pipes between the evaporator and the condenser, enabling for effective thermal energy transfer at relatively fars away.


Heat pumps are more effective for heating than for cooling an interior area if the temperature differential is held equal. This is due to the fact that the compressor’s input energy is also converted to helpful heat when in heating mode, and is discharged in addition to the delivered heat through the condenser to the interior area. However for cooling, the condenser is usually outdoors, and the compressor’s dissipated work (waste heat) must likewise be delivered to outdoors making use of even more input energy, rather than being put to an useful purpose. For the same factor, opening a food fridge or freezer actually warms the space rather than cooling it because its refrigeration cycle rejects heat to the indoor air. This heat consists of the compressor’s dissipated work along with the heat removed from the within of the appliance.


Air to air heat pumps, that extract heat from outside air and transfer this heat to inside air, are the most usual kind of heat pumps and the cheapest. Air water heat pumps are otherwise similar to air to air heat pumps, but they transfer the extracted heat into a water heating circuit, floor heating being the most efficient, and they can likewise transfer heat into a domestic hot water tank for use in showers and hot water taps of the building.


There are also what are understood as variable speed heat pumps that today’s heating and air conditioning contractors have to understand the best ways to set up and fix. A variable speed device is one that has a fan coil or heating system that features a blower motor that adjusts the fan speed instantly according to the need for humidity heating, cooling, or control. These devices typically lead to more consistent temperature levels and also operate extremely silently and successfully.


In electrically powered heat pumps, the heat transferred can be three or four times larger than the electrical power eaten, giving the system a coefficient of performance (COP) of 3 or 4, as opposed to a COP of 1 of a traditional electrical resistance heater, in which all heat is produced from input electrical energy.


Air to air heat pumps, that extract heat from outdoors air and transfer this heat to inside air, are the most common type of heat pumps and the most affordable. Air water heat pumps are otherwise similar to air to air heat pumps, however they move the extracted heat into a water heating circuit, floor heating being the most reliable, and they can also transfer heat into a domestic hot water tank for use in showers and hot water taps of the structure. Ground water heat pumps are more efficient than air water heat pumps, and for that reason they are often the much better selection for offering heat for the floor heating and domestic hot water systems.








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