Air liquid heat exchanger efficiency calculations
Heat recovery units used in ventilation and air condition systems are based on some common principles:. In a return air recovery unit - used air is mixed into the make-up or supply air. Energy in outlet air is supplied directly into the make-up air. Both sensible and latent moisture heat is transferred. In a rotating heat exchanger - outlet air heats or cools the exchanger when the wheel passes through the outlet air flow.
The energy is transferred to the make-up air when the wheel passes through the make-up air. Both sensible and latent heat may be transferred. Latent heat when moisture in the outlet air liquid heat exchanger efficiency calculations condensates on the wheel.
More moisture may be transferred using a hygroscopic wheel. For exchangers without hygroscopic wheels most of the condensate is drained out. In an air-fluid-air heat recovery unit - heat is transferred in an heat exchanger from the outlet air to a circulating fluid. The fluid is circulated to a heat exchanger in the air liquid heat exchanger efficiency calculations air where the heat is transferred to the supply air.
Latent heat when moisture in the outlet air condensates in the heat exchanger. The moisture is not transferred. In a cross flow heat exchanger - heat is transferred directly from the outlet air to the make-up air through the separating walls in the heat exchanger.
Latent heat when moisture in the outlet air condensates on the heat exchanger. A heat pump makes it possible - with some additional energy - to move more outlet air energy to the make-up air than any other system. Moisture is not transferred. The heating process without moisture transfer with air liquid heat exchanger efficiency calculations recovery unit - typical like the cross flow unit in the figure above - can be visualized in a psychrometric Mollier diagram as.
The heating process with heat and moisture recovery can alternatively be visualized in a psychrometric chart as. The calculator below can be used to calculate temperature, moisture or enthalpy efficiency for an heat exchanger - both Imperial and Metric units. The heat kW exchanged calulation is valid for metric units.
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If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Heat Recovery Efficiency Classification of heat recovery efficiency - temperature efficiency, moisture efficiency and enthalpy efficiency - online heat exchanger air liquid heat exchanger efficiency calculations calculator Sponsored Links. Common Energy Recovery Principles Heat recovery units used in ventilation and air condition systems are based on some common principles: Return air Rotating heat exchangers Air-Fluid-Air exchangers Cross flow exchangers Heat pumps Cross flow and rotating heat exchangers are illustrated below: Return Air Recovery Units In a return air recovery unit - used air is mixed into the make-up or supply air.
Rotating Heat Exchangers In a rotating heat exchanger - outlet air heats or cools the exchanger when the wheel passes through air liquid heat exchanger efficiency calculations outlet air flow. Air-Fluid-Air Exchangers In an air-fluid-air heat recovery unit - heat is transferred in an heat exchanger from the outlet air to a circulating fluid. Cross Flow Heat Exchangers In a cross flow heat exchanger - heat is transferred directly from the outlet air to the make-up air through the separating walls in the heat exchanger.
Heat Pumps A heat pump makes it possible - with some additional energy - to move more outlet air energy to the make-up air than any other system. Heat Exchanger Efficiency Calculator The calculator below can be used to calculate temperature, moisture or enthalpy efficiency for an heat exchanger - both Imperial and Metric units. Citation This page can be cited as Engineering ToolBox,
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