|
A heat pump is a machine or device that moves heat from one location (the 'source') to another location (the 'sink' or 'heat sink') using mechanical work. Most heat pump technology moves heat from a low temperature heat source to a higher temperature heat sink. Common examples are food refrigerators and freezers, air conditioners, and reversible-cycle heat pumps for providing thermal comfort. Heat pumps can be thought of as a heat engine which is operating in reverse. One common type of heat pump works by exploiting the physical properties of an evaporating and condensing fluid known as a refrigerant. In heating, ventilation, and air conditioning (HVAC) applications, a heat pump normally refers to a vapor-compression refrigeration device that includes a reversing valve and optimized heat exchangers so that the direction of heat flow may be reversed. Most commonly, heat pumps draw heat from the air or from the ground. Some air-source heat pumps do not work as well when temperatures fall below around −5°C(23°F). From Wikipedia under the
GNU Free Documentation License  airmechanicalinc.com 96px x 89px | 4.70kB [source page] Top of Page ^ From Yahoo Image Search: "Heat Pumps"  local.yodle.com Editor hu, 13 Aug 2009 20:22:04 GM By taking . heat. from the air, water, or ground outside and simply moving it inside, a . heat pump. creates a warm, comfortable environment in every room in your home. In the summer, the . heat pump. acts as an air conditioner, forcing warm ...  ehpa.org unknown ue, 30 Jun 2009 14:27:16 GM Therefore, all energy-efficient systems, such as . heat pumps. , refrigeration systems, solar panels, and systems using seawater, as well as thermal . heat. or . heat. recovery, will be supported. read more. Source: R744.com ...  greenrightnow.com Tom Kessler Wed, 19 Aug 2009 17:05:58 GM Rheem Water Heating says its new . heat pump. water heater achieves an industry-leading Energy Factor of 2.0, or more than twice the energy efficiency of a standard electric storage water heater. The company says the energy-saving design ... From Google Blog Search: "Heat Pumps"  news.google.com Gizmodo.com It has ground source heat pumps (promising a 30% reduction in energy use), photovoltaic arrays, supplementary wind power, high efficiency appliances and ... news.google.com The Nelson Mail It would much rather people replaced old burners with electric heat pumps , or super-low-emission pellet burners, but its stance seems to be at odds with ... news.google.com Pensacola News Journal Dennis Shannon, State of Florida mechanical contractor and qualifier, recently attended a three day International Ground Source Heat Pump Association ... and more » From Google News Search: "Heat Pumps" What are the relative advantages of Geothermal heat pumps and Wind turbines? ? Q. If a heat-engine (Geothermal heat-pump) instead of a wind-turbine were installed instead of a wind-turbine, what difference would it make? Chariotmender, . thank you for a comprehensive and informed answer. If I'm allowed one supplementary question, please, Then why aren't we installing Geothermal heat pumps instead of windmills? -Or more accurately, I suppose, why are we building so many windmills instead of installing heat pumps in appropriate places? Asked by Huguette - Tue Sep 30 09:39:06 2008 - - 4 Answers - 0 Comments A. What are some of the advantages of using geothermal energy to generate electricity? Clean. Geothermal power plants, like wind and solar power plants, do not have to burn fuels to manufacture steam to turn the turbines. Generating electricity with geothermal energy helps to conserve nonrenewable fossil fuels, and by decreasing the use of these fuels, we reduce emissions that harm our atmosphere. There is no smoky air around geothermal power plants -- in fact some are built in the middle of farm crops and forests, and share land with cattle and local wildlife. Easy on the land. The land area required for geothermal power plants is smaller per megawatt than for almost every other type of power plant. Geothermal installations don't require… [cont.] Answered by Chariotmender - Tue Sep 30 09:57:23 2008 What is the COP of heat pumps which are in use presently? Q. By the second law of thermodynamics work has to be done to transfer heat for a low temperature region to a high temperature region. This happens in a refrigerator. The COP is the ratio of heat transferred to work done. Heat pumps are possible(at least in text books) which tranfer heat from low temperature ambience to high temperature enclosures. If they are in practical use what is their COP Asked by ramesh_1960 - Thu Nov 22 06:28:03 2007 - - 2 Answers - 0 Comments A. it is simply the efficiency of the refrigerator or the heat pump...we do not use the efficiency because efficiency is work output over work input, but it is reverse in a heat pump so here we use the coefficient of performance...the higher the COP the better... Answered by Jim - Thu Nov 22 12:44:45 2007 Heat pump will not cool, only pumps out hot air. Any suggestions?
Q. We have an air to air (i.e. not ground source) heat pump with additional heating coils. I have replaced the filter and reset the thermostat. The fan works but the unit will only pump our hot air. Any suggestions on which part might be affected? Asked by easterner - Thu Jul 20 14:27:18 2006 - - 4 Answers - 0 Comments A. Some heat pumps have a baffle that switches the heat from winter use and to the cooler side for summer. If your unit has such a baffle, make sure it is switching over. In theory heat pumps are supposed to work great, but in practice they have limits, especially with extreme temperatures. Answered by gary o - Thu Jul 20 15:21:46 2006 From Yahoo Answer Search: "Heat Pumps" See also:
|
Middleton Sales Company
Enerflow Technologies CC
FHP Manufacturing