Enhancing your HVAC system with Heat Pumps

Not satisfied with the amount of heat (or cooling) being supplied by your HVAC system? You do not have to start considering forking out the cash for a totally new system. There’s a way you could enhance or support the performance of your HVAC system. This is through the installation of a heat pump. While the name may easily trick you to assume that heat pumps only supply heat in a direction, this description is only partially right. A heat pump is actually a device that either supplies heat or removes heat using a refrigerant. It could be both ways and not just one direction. The destination to which heat is supplied is called a heat sink while the point from which it is being transferred is referred to as a heat source. A major advantage of the heat pump is that it carries out the heat transfer efficiency. This means less heat is used in heat transfer than the heat being transferred itself.
Air conditioners, heaters, and refrigerators are all types of heat pumps although they only work in one direction. They can be referred to as half heat pumps. In the case of air conditioners, the heat source is the air within the space to be cooled while the heat sink is the external air where the heat gets deposited (this explains the heat you feel at the back of an air conditioning unit). For a refrigerator, the heat source is also the internal airspace within it and the heat sink is the air outside the refrigerator.
In using heat pumps to serve HVAC purposes, reversible heat pumps are very useful options. A reversible heat pump is a heat pump that works in both directions; either by releasing heat into the space desired or removing heat from it. Reversible pumps are extremely viable especially in heating applications due to the heat efficiency previously mentioned. This efficiency is often as much as three or four times higher than what is achievable by traditional heating systems like furnaces or electrical resistance heaters. This efficiency is due to the fact that most of the heat supplied is taken from the environment through a refrigerant and neither solid nor liquid and gaseous fuels nor even electricity are required in high quantities to generate the heat to be supplied.
Although heat pumps may be quite expensive to purchase and install, over a long period of time, the savings in energy costs will cover and eventually outperform the purchase cost deficit.
In order to be able to perform cooling functions; the removal rather than the supply of heat. Reversible heat pumps have a reversing valve. This valve changes the direction of the refrigerant and allows heat to be removed from the internal space and deposited outside using the exterior air as a heat sink.
A heat pump is an energy efficient option to consider either as a backup or replacement for your HVAC system. As already mentioned, the cost benefits are not in the immediate, but in the long run heat pumps make economic sense. Additional details