Absorption refrigeration in buildings - Revision history

Designing Buildings at 09:27, 15 November 2021

2021-11-15T09:27:04Z

← Older revision		Revision as of 09:27, 15 November 2021
Line 33:		Line 33:
	* Absorption heat pump.		* Absorption heat pump.
	* Absorption refrigeration.		* Absorption refrigeration.
		+	* Adsorption cooling.
	* Air conditioning.		* Air conditioning.
	* Air handling unit.		* Air handling unit.

Designing Buildings at 09:23, 15 November 2021

2021-11-15T09:23:29Z

← Older revision		Revision as of 09:23, 15 November 2021
Line 28:		Line 28:
	Ammonia is not an ozone depleting gas or a global warming gas. However it is flammable and toxic so additional precautions are necessary in design and use.		Ammonia is not an ozone depleting gas or a global warming gas. However it is flammable and toxic so additional precautions are necessary in design and use.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings =
−		+
−	=== Related articles on Designing Buildings ~~Wiki ==~~=	+

		+	* Absorption cooling.
	* Absorption heat pump.		* Absorption heat pump.
		+	* Absorption refrigeration.
	* Air conditioning.		* Air conditioning.
	* Air handling unit.		* Air handling unit.

Designing Buildings at 06:34, 11 November 2020

2020-11-11T06:34:57Z

← Older revision		Revision as of 06:34, 11 November 2020
Line 54:		Line 54:
	* [http://www.cibsejournal.com/cpd/2009-11/ CIBSE, Absorption refrigeration].		* [http://www.cibsejournal.com/cpd/2009-11/ CIBSE, Absorption refrigeration].

−	[[Category:~~Products_/_components~~]] [[Category:DCN_Product_Knowledge]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Products_/_components]]

Designing Buildings at 08:40, 27 April 2018

2018-04-27T08:40:21Z

← Older revision		Revision as of 08:40, 27 April 2018
Line 1:		Line 1:
−
	Refrigerants are used in buildings:		Refrigerants are used in buildings:
−	*For heating, ventilation and air conditioning (HVAC) systems.	+
−	*To provide cooling for refrigeration.	+	* For heating, ventilation and air conditioning (HVAC) systems.
−	*To provide cooling for industrial processes.	+	* To provide cooling for refrigeration.
		+	* To provide cooling for industrial processes.

	They provide cooling in a process that is essentially the same as that used in domestic fridges, based on either compression or absorption.		They provide cooling in a process that is essentially the same as that used in domestic fridges, based on either compression or absorption.
Line 15:		Line 15:
	The liquid refrigerant absorbs heat from the body that is to be cooled (in buildings this may be water that once cool is circulated back to the building) and the refrigerant evaporates at low pressure (in the ‘evaporator’). It is then absorbed into an absorber fluid and the refrigerant / absorber mixture is heated (in the ‘generator’). The refrigerant evaporates again, this time at higher temperature and pressure. The refrigerant is then condensed (in the ‘condenser’) and the heat rejected. The process is then repeated.		The liquid refrigerant absorbs heat from the body that is to be cooled (in buildings this may be water that once cool is circulated back to the building) and the refrigerant evaporates at low pressure (in the ‘evaporator’). It is then absorbed into an absorber fluid and the refrigerant / absorber mixture is heated (in the ‘generator’). The refrigerant evaporates again, this time at higher temperature and pressure. The refrigerant is then condensed (in the ‘condenser’) and the heat rejected. The process is then repeated.

−	Double-effect absorption cooling repeats the process of heating and condensing with as second generator and condenser to increase cooling capacity.~~<br/>~~	+	Double-effect absorption cooling repeats the process of heating and condensing with as second generator and condenser to increase cooling capacity.

	The heat in absorption refrigeration can be gas powered, but absorption refrigeration is particularly suited to situations where ‘waste’, or other low-cost heat supply is available, such as; surplus heat from combined heat and power plant (CHP), heat from industrial processes, district heating, geothermal or solar thermal energy and so on.		The heat in absorption refrigeration can be gas powered, but absorption refrigeration is particularly suited to situations where ‘waste’, or other low-cost heat supply is available, such as; surplus heat from combined heat and power plant (CHP), heat from industrial processes, district heating, geothermal or solar thermal energy and so on.
Line 22:		Line 22:

	The most common combinations of refrigerant and absorbent fluid are:		The most common combinations of refrigerant and absorbent fluid are:
−	*Water absorbent and ammonia refrigerant.	+
−	*Lithium bromide absorbent and water refrigerant.	+	* Water absorbent and ammonia refrigerant.
		+	* Lithium bromide absorbent and water refrigerant.

	Ammonia is not an ozone depleting gas or a global warming gas. However it is flammable and toxic so additional precautions are necessary in design and use.		Ammonia is not an ozone depleting gas or a global warming gas. However it is flammable and toxic so additional precautions are necessary in design and use.
Line 30:		Line 31:

	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===
−	*Absorption heat pump.	+
−	*Air conditioning.	+	* Absorption heat pump.
−	*Air handling unit.	+	* Air conditioning.
−	*Chilled beam.	+	* Air handling unit.
−	*Chiller unit.	+	* BREEAM Impact of refrigerants.
−	*Chilled water.	+	* Chilled beam.
−	*Compression refrigeration.	+	* Chiller unit.
−	*Constant air volume.	+	* Chilled water.
−	*Evaporative cooling.	+	* Compression refrigeration.
−	*Fan coil unit.	+	* Constant air volume.
−	*Heat pumps	+	* Evaporative cooling.
−	*HVAC.	+	* Fan coil unit.
−	*Passive building design.	+	* Heat pumps
−	*Refrigerant.	+	* HVAC.
−	*Thermal comfort.	+	* Passive building design.
−	*Variable air volume.	+	* Refrigerant.
−	*Variable refrigerant flow.	+	* Variable air volume.
−	*Ventilation.	+	* Variable refrigerant flow.

	=== External references ===		=== External references ===
−	*[http://www.cibsejournal.com/cpd/2009-11/ CIBSE, Absorption refrigeration].

−	[[Category:Products_/_components]]	+	* [http://www.cibsejournal.com/cpd/2009-11/ CIBSE, Absorption refrigeration].
		+
		+	[[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings at 10:34, 13 December 2014

2014-12-13T10:34:27Z

← Older revision		Revision as of 10:34, 13 December 2014
Line 35:		Line 35:
	*Chilled beam.		*Chilled beam.
	*Chiller unit.		*Chiller unit.
		+	*Chilled water.
	*Compression refrigeration.		*Compression refrigeration.
	*Constant air volume.		*Constant air volume.

Designing Buildings at 15:21, 12 December 2014

2014-12-12T15:21:00Z

← Older revision		Revision as of 15:21, 12 December 2014
Line 35:		Line 35:
	*Chilled beam.		*Chilled beam.
	*Chiller unit.		*Chiller unit.
		+	*Compression refrigeration.
	*Constant air volume.		*Constant air volume.
	*Evaporative cooling.		*Evaporative cooling.

Designing Buildings at 11:05, 31 October 2014

2014-10-31T11:05:20Z

← Older revision		Revision as of 11:05, 31 October 2014
Line 36:		Line 36:
	*Chiller unit.		*Chiller unit.
	*Constant air volume.		*Constant air volume.
		+	*Evaporative cooling.
	*Fan coil unit.		*Fan coil unit.
	*Heat pumps		*Heat pumps

Designing Buildings: moved Absorption refrigeration to Absorption refrigeration in buildings

2014-10-25T07:09:13Z

moved Absorption refrigeration to Absorption refrigeration in buildings

← Older revision

Revision as of 07:09, 25 October 2014

Designing Buildings at 09:04, 23 October 2014

2014-10-23T09:04:53Z

← Older revision		Revision as of 09:04, 23 October 2014
Line 11:		Line 11:
	In ‘conventional’ compression systems, a liquid refrigerant with a low boiling point absorbs heat from the body that is being cooled and boils in an evaporator to form a gas. The resulting gas is then compressed, which increases its temperature further. The gas is then condensed, releasing its latent heat which is rejected. The process then repeats.		In ‘conventional’ compression systems, a liquid refrigerant with a low boiling point absorbs heat from the body that is being cooled and boils in an evaporator to form a gas. The resulting gas is then compressed, which increases its temperature further. The gas is then condensed, releasing its latent heat which is rejected. The process then repeats.

−	However, whilst in compression refrigeration, the compression and refrigerant flow is achieved ~~with~~ an electrical compressor, in absorption refrigeration, compression is achieved by heating, and circulation is achieved absorbing the refrigerant into and absorber and by an electrical pump. This pump uses much less energy than a compressor.	+	However, whilst in compression refrigeration, the compression and refrigerant flow is achieved by an electrical compressor, in absorption refrigeration, compression is achieved by heating, and circulation is achieved absorbing the refrigerant into and absorber and by an electrical pump. This pump uses much less energy than a compressor.

−	The liquid refrigerant absorbs heat from the body that is to be cooled (in buildings this may be water that once cool is circulated back to the building) and the refrigerant evaporates at low pressure (in the ‘evaporator’). It is then absorbed into an absorber fluid and the refrigerant / absorber mixture is ~~then~~ heated (in the ‘generator’). The refrigerant evaporates again, this time at higher temperature and pressure. The refrigerant is then condensed (in the ‘condenser’) and the	+	The liquid refrigerant absorbs heat from the body that is to be cooled (in buildings this may be water that once cool is circulated back to the building) and the refrigerant evaporates at low pressure (in the ‘evaporator’). It is then absorbed into an absorber fluid and the refrigerant / absorber mixture is heated (in the ‘generator’). The refrigerant evaporates again, this time at higher temperature and pressure. The refrigerant is then condensed (in the ‘condenser’) and the heat rejected. The process is then repeated.

−	~~heat rejected. The process is then repeated.~~	+	Double-effect absorption cooling repeats the process of heating and condensing with as second generator and condenser to increase cooling capacity.<br/>
−		+
−	Double-effect absorption cooling repeats the process of heating and condensing, to increase cooling capacity. <br/>	+

	The heat in absorption refrigeration can be gas powered, but absorption refrigeration is particularly suited to situations where ‘waste’, or other low-cost heat supply is available, such as; surplus heat from combined heat and power plant (CHP), heat from industrial processes, district heating, geothermal or solar thermal energy and so on.		The heat in absorption refrigeration can be gas powered, but absorption refrigeration is particularly suited to situations where ‘waste’, or other low-cost heat supply is available, such as; surplus heat from combined heat and power plant (CHP), heat from industrial processes, district heating, geothermal or solar thermal energy and so on.
Line 32:		Line 30:

	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===
		+	*Absorption heat pump.
	*Air conditioning.		*Air conditioning.
	*Air handling unit.		*Air handling unit.

Designing Buildings at 09:01, 23 October 2014

2014-10-23T09:01:21Z

← Older revision		Revision as of 09:01, 23 October 2014
Line 7:		Line 7:
	They provide cooling in a process that is essentially the same as that used in domestic fridges, based on either compression or absorption.		They provide cooling in a process that is essentially the same as that used in domestic fridges, based on either compression or absorption.

−	Absorption and compression refrigeration both ~~works~~ on a similar basis, in that a refrigerant boils at a low temperature and pressure, and is then is then pressurised, and condensed at a higher temperature and pressure. The process of condensing releases heat which is rejected.	+	Absorption and compression refrigeration both work on a similar basis, in that a refrigerant boils at a low temperature and pressure, and is then is then pressurised, and condensed at a higher temperature and pressure. The process of condensing releases heat which is rejected.

	In ‘conventional’ compression systems, a liquid refrigerant with a low boiling point absorbs heat from the body that is being cooled and boils in an evaporator to form a gas. The resulting gas is then compressed, which increases its temperature further. The gas is then condensed, releasing its latent heat which is rejected. The process then repeats.		In ‘conventional’ compression systems, a liquid refrigerant with a low boiling point absorbs heat from the body that is being cooled and boils in an evaporator to form a gas. The resulting gas is then compressed, which increases its temperature further. The gas is then condensed, releasing its latent heat which is rejected. The process then repeats.

−	However, in whilst in compression refrigeration, the compression and refrigerant flow is achieved with an electrical compressor, in absorption refrigeration, ~~compression is~~ compression is achieved by heating, and circulation is achieved absorbing the refrigerant into and absorber ~~that is generally circulated~~ an electrical pump. This pump uses much less energy than a compressor.	+	However, whilst in compression refrigeration, the compression and refrigerant flow is achieved with an electrical compressor, in absorption refrigeration, compression is achieved by heating, and circulation is achieved absorbing the refrigerant into and absorber and by an electrical pump. This pump uses much less energy than a compressor.

−	The heat ~~supply can~~ be ~~gas powered, but absorption refrigeration~~ is ~~particularly suited~~ to ~~situations where a ‘waste’, or other~~ low~~-cost heat supply~~ is ~~available, such as CHP surplus heat, heat from~~ an ~~industrial process, district heating~~, ~~geothermal or solar energy~~ and ~~so on~~.	+	The liquid refrigerant absorbs heat from the body that is to be cooled (in buildings this may be water that once cool is circulated back to the building) and the refrigerant evaporates at low pressure (in the ‘evaporator’). It is then absorbed into an absorber fluid and the refrigerant / absorber mixture is then heated (in the ‘generator’). The refrigerant evaporates again, this time at higher temperature and pressure. The refrigerant is then condensed (in the ‘condenser’) and the

−	~~Absorption refrigeration was first developed in France in 1850’s, but it was not commercially exploited until the 1920’s~~.	+	heat rejected. The process is then repeated.

−	~~The liquid refrigerant absorbs heat from~~ the ~~body that is~~ to ~~be cooled (in buildings this may be water that once cool is circulated back to the building) and the refrigerant evaporates at low pressure (in the ‘evaporator’)~~. ~~It is then absorbed into an absorber fluid and the refrigerant~~ / absorber mixture is then heated (in the ‘generator’). The refrigerant evaporates again, this time at higher temperature and pressure. The refrigerant is then condensed (in the ‘condenser’) and the heat rejected. The process is then repeated.	+	Double-effect absorption cooling repeats the process of heating and condensing, to increase cooling capacity. <br/>

−	~~Double-effect~~ absorption ~~cooling repeats the process of~~ heating and ~~condensing~~, ~~to increase cooling capacity~~.	+	The heat in absorption refrigeration can be gas powered, but absorption refrigeration is particularly suited to situations where ‘waste’, or other low-cost heat supply is available, such as; surplus heat from combined heat and power plant (CHP), heat from industrial processes, district heating, geothermal or solar thermal energy and so on.
		+
		+	Absorption refrigeration was first developed in France in 1850’s, but it was not commercially exploited until the 1920’s.

	The most common combinations of refrigerant and absorbent fluid are:		The most common combinations of refrigerant and absorbent fluid are: