Variable refrigerant flow VRF - Revision history

Editor at 10:45, 3 August 2021

2021-08-03T10:45:21Z

← Older revision		Revision as of 10:45, 3 August 2021
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	* Refrigerants.		* Refrigerants.
	* Thermal comfort.		* Thermal comfort.
		+	* US among top 2020 global variable refrigerant flow markets.
	* Variable air volume.		* Variable air volume.
	* Ventilation.		* Ventilation.

	[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Products_/_components]]		[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Products_/_components]]

Editor at 11:21, 7 June 2021

2021-06-07T11:21:18Z

← Older revision		Revision as of 11:21, 7 June 2021
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	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

		+	* 2021 UK HVAC trends: winners and losers.
	* Air conditioning.		* Air conditioning.
	* Air handling unit.		* Air handling unit.

Editor at 13:45, 30 September 2020

2020-09-30T13:45:18Z

← Older revision		Revision as of 13:45, 30 September 2020
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−
	Variable refrigerant flow (VRF) is a system for the heating, ventilation and air conditioning (HVAC) of buildings.		Variable refrigerant flow (VRF) is a system for the heating, ventilation and air conditioning (HVAC) of buildings.

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	Very broadly, VRF systems can be two-pipe or three pipe systems:		Very broadly, VRF systems can be two-pipe or three pipe systems:
−	*Two pipe systems can provide either cooling or heating (heat pump systems) to all of the zones.	+
−	*Three pipe systems, can provide heating and cooling simultaneously, heating some zones and cooling others, with heat recovery enabling heat from zones requiring cooling to be used to heat zones that require heating. Whilst this has a greater capital cost, the heat recovery allows very efficient operation and so lower operating costs.	+	* Two pipe systems can provide either cooling or heating (heat pump systems) to all of the zones.
		+	* Three pipe systems, can provide heating and cooling simultaneously, heating some zones and cooling others, with heat recovery enabling heat from zones requiring cooling to be used to heat zones that require heating. Whilst this has a greater capital cost, the heat recovery allows very efficient operation and so lower operating costs.

	VRF systems are best suited to buildings with multiple spaces, varying heating and cooling demand and the need for good local control, such as hotels, where some rooms may be unoccupied whilst others have a very high thermal demand. Because of their limited space requirements (depending on how ventilation is provided) compared to some other systems, they may also be suited to retrofitting older buildings.		VRF systems are best suited to buildings with multiple spaces, varying heating and cooling demand and the need for good local control, such as hotels, where some rooms may be unoccupied whilst others have a very high thermal demand. Because of their limited space requirements (depending on how ventilation is provided) compared to some other systems, they may also be suited to retrofitting older buildings.
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	They may be less suited to large uniform spaces such as gymnasiums or theatres.		They may be less suited to large uniform spaces such as gymnasiums or theatres.

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

−	~~=== Related articles on Designing Buildings Wiki ===~~	+	* Air conditioning.
−	*Air conditioning.	+	* Air handling unit.
−	*Air handling unit.	+	* Building services.
−	*Building services.	+	* Chilled beam.
−	*Chilled beam.	+	* Chiller unit.
−	*Chiller unit.	+	* Cooling systems for buildings.
−	*Cooling systems for buildings.	+	* Constant air volume.
−	*Constant air volume.	+	* COVID-19 and the US HVAC sector.
−	*Cross ventilation.	+	* Cross ventilation.
−	*Fan coil unit.	+	* Fan coil unit.
−	*Heat pump.	+	* Heat pump.
−	*Mechanical ventilation.	+	* Mechanical ventilation.
−	*Natural ventilation.	+	* Natural ventilation.
−	*Refrigerants.	+	* Refrigerants.
−	*Thermal comfort.	+	* Thermal comfort.
−	*Variable air volume.	+	* Variable air volume.
−	*Ventilation.	+	* Ventilation.

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

Designing Buildings at 14:20, 31 October 2014

2014-10-31T14:20:11Z

← Older revision		Revision as of 14:20, 31 October 2014
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	*Chilled beam.		*Chilled beam.
	*Chiller unit.		*Chiller unit.
		+	*Cooling systems for buildings.
	*Constant air volume.		*Constant air volume.
	*Cross ventilation.		*Cross ventilation.
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	*Ventilation.		*Ventilation.

−	[[Category:Products_/_components]]	+	[[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings at 08:05, 21 October 2014

2014-10-21T08:05:28Z

← Older revision		Revision as of 08:05, 21 October 2014
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	*Mechanical ventilation.		*Mechanical ventilation.
	*Natural ventilation.		*Natural ventilation.
		+	*Refrigerants.
	*Thermal comfort.		*Thermal comfort.
	*Variable air volume.		*Variable air volume.

Designing Buildings at 10:35, 17 October 2014

2014-10-17T10:35:51Z

← Older revision		Revision as of 10:35, 17 October 2014
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	*Air handling unit.		*Air handling unit.
	*Building services.		*Building services.
		+	*Chilled beam.
		+	*Chiller unit.
	*Constant air volume.		*Constant air volume.
	*Cross ventilation.		*Cross ventilation.

Designing Buildings at 09:52, 16 October 2014

2014-10-16T09:52:16Z

← Older revision		Revision as of 09:52, 16 October 2014
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−

	Variable refrigerant flow (VRF) is a system for the heating, ventilation and air conditioning (HVAC) of buildings.		Variable refrigerant flow (VRF) is a system for the heating, ventilation and air conditioning (HVAC) of buildings.
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	It was first developed by Daikin Industries in Japan, under the trade name ‘variable refrigerant volume’ (VRV), but is now widely used throughout the world under the generic name ‘variable refrigerant flow’ (VRF). VRF systems are becoming increasingly popular as they can be more efficient, more compact and offer greater flexibility than other HVAC systems.		It was first developed by Daikin Industries in Japan, under the trade name ‘variable refrigerant volume’ (VRV), but is now widely used throughout the world under the generic name ‘variable refrigerant flow’ (VRF). VRF systems are becoming increasingly popular as they can be more efficient, more compact and offer greater flexibility than other HVAC systems.

−	VRF systems are based on the flow of refrigerant between an external condensing unit and multiple internal evaporators (typically fan coil units). Each internal evaporator serves a different thermal ~~zones~~ within the building, and the flow of refrigerant to each evaporator is adjusted depending on the local requirement. This gives a great deal of flexibility, and as the output of the outdoor condenser adjusts to match the total internal demand, it allows the systems as a whole to operate at optimum efficiency.	+	VRF systems are based on the flow of refrigerant between an external condensing unit and multiple internal evaporators (typically fan coil units). Each internal evaporator serves a different thermal zone within the building, and the flow of refrigerant to each evaporator is adjusted depending on the local requirement. This gives a great deal of flexibility, and as the output of the outdoor condenser adjusts to match the total internal demand, it allows the systems as a whole to operate at optimum efficiency.

−	VRF systems can be two-pipe or three pipe systems:	+	Very broadly, VRF systems can be two-pipe or three pipe systems:
	*Two pipe systems can provide either cooling or heating (heat pump systems) to all of the zones.		*Two pipe systems can provide either cooling or heating (heat pump systems) to all of the zones.
−	*Three pipe systems, can provide heating and cooling simultaneously, heating some zones and cooling others, with heat recovery enabling heat from zones requiring cooling ~~being~~ used to heat zones that require heating. Whilst this has a greater capital cost, the heat recovery allows very efficient operation and so lower operating costs.	+	*Three pipe systems, can provide heating and cooling simultaneously, heating some zones and cooling others, with heat recovery enabling heat from zones requiring cooling to be used to heat zones that require heating. Whilst this has a greater capital cost, the heat recovery allows very efficient operation and so lower operating costs.

	VRF systems are best suited to buildings with multiple spaces, varying heating and cooling demand and the need for good local control, such as hotels, where some rooms may be unoccupied whilst others have a very high thermal demand. Because of their limited space requirements (depending on how ventilation is provided) compared to some other systems, they may also be suited to retrofitting older buildings.		VRF systems are best suited to buildings with multiple spaces, varying heating and cooling demand and the need for good local control, such as hotels, where some rooms may be unoccupied whilst others have a very high thermal demand. Because of their limited space requirements (depending on how ventilation is provided) compared to some other systems, they may also be suited to retrofitting older buildings.
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	= Find out more =		= Find out more =

−	Related articles on Designing Buildings Wiki	+	=== Related articles on Designing Buildings Wiki ===
	*Air conditioning.		*Air conditioning.
		+	*Air handling unit.
	*Building services.		*Building services.
	*Constant air volume.		*Constant air volume.
	*Cross ventilation.		*Cross ventilation.
		+	*Fan coil unit.
		+	*Heat pump.
	*Mechanical ventilation.		*Mechanical ventilation.
	*Natural ventilation.		*Natural ventilation.

Designing Buildings: moved Variable refrigerant flow to Variable refrigerant flow VRF

2014-10-16T09:49:01Z

moved Variable refrigerant flow to Variable refrigerant flow VRF

← Older revision

Revision as of 09:49, 16 October 2014

Designing Buildings: Created page with " Variable refrigerant flow (VRF) is a system for the heating, ventilation and air conditioning (HVAC) of buildings. It was first developed by Daikin Industries in Japan, under ..."

2014-10-16T09:48:45Z

Created page with " Variable refrigerant flow (VRF) is a system for the heating, ventilation and air conditioning (HVAC) of buildings. It was first developed by Daikin Industries in Japan, under ..."

New page

Variable refrigerant flow (VRF) is a system for the heating, ventilation and air conditioning (HVAC) of buildings.

It was first developed by Daikin Industries in Japan, under the trade name ‘variable refrigerant volume’ (VRV), but is now widely used throughout the world under the generic name ‘variable refrigerant flow’ (VRF). VRF systems are becoming increasingly popular as they can be more efficient, more compact and offer greater flexibility than other HVAC systems.

VRF systems are based on the flow of refrigerant between an external condensing unit and multiple internal evaporators (typically fan coil units). Each internal evaporator serves a different thermal zones within the building, and the flow of refrigerant to each evaporator is adjusted depending on the local requirement. This gives a great deal of flexibility, and as the output of the outdoor condenser adjusts to match the total internal demand, it allows the systems as a whole to operate at optimum efficiency.

VRF systems can be two-pipe or three pipe systems:
*Two pipe systems can provide either cooling or heating (heat pump systems) to all of the zones.
*Three pipe systems, can provide heating and cooling simultaneously, heating some zones and cooling others, with heat recovery enabling heat from zones requiring cooling being used to heat zones that require heating. Whilst this has a greater capital cost, the heat recovery allows very efficient operation and so lower operating costs.

VRF systems are best suited to buildings with multiple spaces, varying heating and cooling demand and the need for good local control, such as hotels, where some rooms may be unoccupied whilst others have a very high thermal demand. Because of their limited space requirements (depending on how ventilation is provided) compared to some other systems, they may also be suited to retrofitting older buildings.

They may be less suited to large uniform spaces such as gymnasiums or theatres.

= Find out more =

Related articles on Designing Buildings Wiki
*Air conditioning.
*Building services.
*Constant air volume.
*Cross ventilation.
*Mechanical ventilation.
*Natural ventilation.
*Thermal comfort.
*Variable air volume.
*Ventilation.

[[Category:Products_/_components]]