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Difference between revisions of "Portal:Heat exchangers"

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Heat Exchangers
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Heat Exchangers  
  
 
A heat exchanger is a device built for efficient heat transfer from one medium to another. The media may be separated by a solid wall, so that they never mix, or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment. One common example of a heat exchanger is the radiator in a car, in which the heat source, being a hot engine-cooling fluid, water, transfers heat to air flowing through the radiator (i.e. the heat transfer medium).  
 
A heat exchanger is a device built for efficient heat transfer from one medium to another. The media may be separated by a solid wall, so that they never mix, or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment. One common example of a heat exchanger is the radiator in a car, in which the heat source, being a hot engine-cooling fluid, water, transfers heat to air flowing through the radiator (i.e. the heat transfer medium).  
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= Heat Exchanger Development =
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= Heat Exchanger Development =
  
 
*[[Engineering for Sustainable Development]] is an Appropedia page with external links to education programs and courses.  
 
*[[Engineering for Sustainable Development]] is an Appropedia page with external links to education programs and courses.  
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== Footnotes  ==
 
== Footnotes  ==

Revision as of 17:33, 18 January 2011



                 Highlighted Heat exchanger

An idea of how to make your home or business more
energy efficient.


Heat Exchangers

A heat exchanger is a device built for efficient heat transfer from one medium to another. The media may be separated by a solid wall, so that they never mix, or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment. One common example of a heat exchanger is the radiator in a car, in which the heat source, being a hot engine-cooling fluid, water, transfers heat to air flowing through the radiator (i.e. the heat transfer medium).



http://en.wikipedia.org/wiki/Heat_exchanger


http://en.wikipedia.org/wiki/Drain_water_heat_recovery

http://en.wikipedia.org/wiki/Heat_recovery_ventilation


Energy recovery ventilators (ERVs) are closely related, however ERVs also transfer the humidity level of the exhaust air to the intake air.
http://en.wikipedia.org/wiki/Energy_recovery_ventilation



Shell and tube heat exchanger

Plate heat exchanger
Plate fin heat exchanger
Ground-coupled heat exchanger
Dynamic scraped surface heat exchanger
Waste Heat Recovery Unit
Micro heat exchanger
Moving bed heat exchanger


There are a number of heat exchangers used in Heat recovery ventilation-HRV devices, as diagrammed to the right :
     cross flow heat exchanger up to 60% efficient (passive)
     countercurrent heat exchanger up to 99% efficient (passive)
     rotary heat exchanger (requires motor to turn wheel)
     heat pipes
     thin multiple heat wires (Fine wire heat exchanger)


Incoming air
The air coming into the heat exchanger should be at least 0°C. Otherwise humidity in the outgoing air may condense, freeze and block the heat exchanger.
A high enough incoming air temperature can also be achieved by
recirculating some of the exhaust air (causing loss of air quality) when required,
by using a very small (1 kW) heat pump to warm the inlet air above freezing before it enters the HRV. (The 'cold' side of this heatpump is situated in the warm air outlet.)
using a heating "battery" supplied by heat from a heat source eg hot water circuit from a wood fired boiler, etc.


Earth-to-air heat exchanger


Heat recovery ventilation, often with an earth-to-air heat exchanger, is essential to achieve German Passivhaus standards.
Main article: Ground-coupled heat exchanger



See also....

Air conditioning - Health implications
HVAC.................... http://en.wikipedia.org/wiki/HVAC




Types:

http://images.wikia.com/solarcooking/images/2/2e/Granada06_david_denkenberger.pdf

The plastic bags was for the heat exchanger - thesis found here:
http://gradworks.umi.com/34/19/3419453.html



http://www.appropedia.org/Ground_source_heat_pumps

http://www.appropedia.org/Solar_hot_water

http://en.wikipedia.org/wiki/Solar_air_heat

http://www.appropedia.org/Measures_to_stop_global_warming

http://www.appropedia.org/Original:Solar_thermal_energy

solar wall

http://en.wikipedia.org/wiki/Geothermal_heat_pump
http://en.wikipedia.org/wiki/Direct_exchange_geothermal_heat_pump
http://en.wikipedia.org/wiki/Deep_water_source_cooling
http://en.wikipedia.org/wiki/Solar_thermal_energy
http://en.wikipedia.org/wiki/Trombe_wall
http://www.appropedia.org/Appropriate_technology


http://www.enwave.com/

http://www.appropedia.org/Appropriate_technology


See also: Sterling Engine






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Stubs that need to be expanded:

See also: Suggested projects


Heat Exchanger Development


Tools

  • The Open source engineering software page has many links to various open source software programs used in engineering.
  • Thingiverse is a website where people can share digital designs. It also provides a way to upload non-compliant files to be shared on Appropedia pages.


Companies involved in creating heat exchangers

United States



Canada

http://www.enwave.com/


Footnotes