heat-transfer efficiency

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• Heat pump efficiency —   The efficiency of a heat pump, that is, the electrical energy to operate it, is directly related to temperatures between which it operates. Geothermal heat pumps are more efficient than conventional heat pumps or air conditioners that use the… …   Energy terms

• Enhanced heat transfer — Heat exchangers were initially developed to use plain (or smooth) heat transfer surfaces. An Enhanced heat transfer surface has a special surface geometry that provides a higher thermal performance, per unit base surface area than a plain surface …   Wikipedia

• Heat exchanger — An interchangeable plate heat exchanger Tubular heat exchan …   Wikipedia

• Heat engine — Thermodynamics …   Wikipedia

• Heat pipe — A heat pipe is a heat transfer mechanism that can transport large quantities of heat with a very small difference in temperature between the hotter and colder interfaces. Inside a heat pipe, at the hot interface a fluid turns to vapour and the… …   Wikipedia

• Heat pump — 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 work. Most heat pump technology moves heat from a low temperature heat source to a higher temperature heat sink …   Wikipedia

• Heat capacity — Thermodynamics …   Wikipedia

• Heat recovery ventilation — (also known as a heat exchanger, air exchanger or air to air exchanger) is a ventilation system that employs a counter flow heat exchanger between the inbound and outbound air flow. HRV provide fresh air and improved climate control, while also… …   Wikipedia

• heat pipe — noun : a closed container in which a continuing cycle of evaporation and condensation of a fluid takes place with the heat being given off at the condenser end and which is more effective in transferring heat than a metallic conductor * * * heat… …   Useful english dictionary

• Geothermal heat pump — A geothermal heat pump system is a heating and/or an air conditioning system that uses the Earth s ability to store heat in the ground and water thermal masses. These systems operate based on the stability of underground temperatures: the ground… …   Wikipedia

• Renewable heat — is an application of renewable energy. It refers to the renewable generation of heat, rather than electrical power.Many colder countries consume more energy for heating than electrical power. For example, in 2005 the United Kingdom consumed 354… …   Wikipedia