Operative temperature - Revision history

Designing Buildings at 08:46, 2 March 2023

2023-03-02T08:46:16Z

← Older revision		Revision as of 08:46, 2 March 2023
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	NB [https://www.bsria.com/uk/product/4BR42n/illustrated_guide_to_mechanical_cooling_bg_12010_a15d25e1/ Illustrated Guide to Mechanical Cooling (BG 1/2010)], written by Kevin Pennycook and published by BSRIA in 2010, defines resultant temperature as: ‘A temperature often used to specify a design condition for a space, it combines air temperature, surface temperature and air velocity in a single index.’		NB [https://www.bsria.com/uk/product/4BR42n/illustrated_guide_to_mechanical_cooling_bg_12010_a15d25e1/ Illustrated Guide to Mechanical Cooling (BG 1/2010)], written by Kevin Pennycook and published by BSRIA in 2010, defines resultant temperature as: ‘A temperature often used to specify a design condition for a space, it combines air temperature, surface temperature and air velocity in a single index.’
		+
		+	[https://www.bsria.com/uk/product/DXzEjr/thermal_comfort_tg_222023_a15d25e1 Thermal Comfort (TG 22/2023)] published by BSRIA in 2023 defines operative temperature as: ‘….a measure of thermal comfort which takes into account air temperature, mean radiant temperature and air speed. The term dry resultant temperature was formerly used for this. Operative temperature is a better measure than dry bulb temperature for specifying setpoints within many buildings as it considers the radiative component (from equipment such as chilled ceilings and fabric components such as windows) and air movement in the space.’

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Designing Buildings at 07:11, 5 August 2022

2022-08-05T07:11:53Z

← Older revision		Revision as of 07:11, 5 August 2022
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	In many spaces, with low air velocity and where air temperature and mean radiant temperature may be similar, air temperature alone can be a reasonable indicator of thermal comfort. However, in spaces where surfaces may be heated or cooled, where there is significant thermal mass, or where solar radiation is present, air and radiant temperatures may be very different and so it is necessary to take account of radiant temperatures in assessing thermal comfort...		In many spaces, with low air velocity and where air temperature and mean radiant temperature may be similar, air temperature alone can be a reasonable indicator of thermal comfort. However, in spaces where surfaces may be heated or cooled, where there is significant thermal mass, or where solar radiation is present, air and radiant temperatures may be very different and so it is necessary to take account of radiant temperatures in assessing thermal comfort...

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	NB [https://www.bsria.com/uk/product/4BR42n/illustrated_guide_to_mechanical_cooling_bg_12010_a15d25e1/ Illustrated Guide to Mechanical Cooling (BG 1/2010)], written by Kevin Pennycook and published by BSRIA in 2010, defines resultant temperature as: ‘A temperature often used to specify a design condition for a space, it combines air temperature, surface temperature and air velocity in a single index.’
		+
		+	= Related articles on Designing Buildings =

	* BREEAM Thermal comfort.		* BREEAM Thermal comfort.

Designing Buildings at 07:52, 16 September 2020

2020-09-16T07:52:20Z

← Older revision		Revision as of 07:52, 16 September 2020
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	* Wet-bulb temperature.		* Wet-bulb temperature.

−	[[Category:~~Articles_needing_more_work~~]] [[Category:~~Standards_/_measurements~~]] [[Category:DCN_Standard]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Standard]] [[Category:Standards_/_measurements]]

Designing Buildings at 09:27, 25 July 2019

2019-07-25T09:27:13Z

← Older revision		Revision as of 09:27, 25 July 2019
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	In many spaces, with low air velocity and where air temperature and mean radiant temperature may be similar, air temperature alone can be a reasonable indicator of thermal comfort. However, in spaces where surfaces may be heated or cooled, where there is significant thermal mass, or where solar radiation is present, air and radiant temperatures may be very different and so it is necessary to take account of radiant temperatures in assessing thermal comfort...		In many spaces, with low air velocity and where air temperature and mean radiant temperature may be similar, air temperature alone can be a reasonable indicator of thermal comfort. However, in spaces where surfaces may be heated or cooled, where there is significant thermal mass, or where solar radiation is present, air and radiant temperatures may be very different and so it is necessary to take account of radiant temperatures in assessing thermal comfort...

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

	* BREEAM Thermal comfort.		* BREEAM Thermal comfort.
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	* Globe temperature.		* Globe temperature.
	* Humidity.		* Humidity.
		+	* ‎Maximum and minimum workplace temperatures.
	* Mean radiant temperature.		* Mean radiant temperature.
	* Predicted mean vote.		* Predicted mean vote.
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	* Wet-bulb temperature.		* Wet-bulb temperature.

−	[[Category:Articles_needing_more_work]] [[Category:Standards_/_measurements]]	+	[[Category:Articles_needing_more_work]] [[Category:Standards_/_measurements]] [[Category:DCN_Standard]]

Designing Buildings at 14:12, 26 March 2018

2018-03-26T14:12:17Z

← Older revision		Revision as of 14:12, 26 March 2018
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	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===

		+	* BREEAM Thermal comfort.
	* Dry-bulb temperature.		* Dry-bulb temperature.
	* Globe temperature.		* Globe temperature.

212.219.92.51: Undo revision 65329 by 212.219.92.51 (talk)

2016-12-15T12:24:52Z

Undo revision 65329 by 212.219.92.51 (talk)

← Older revision		Revision as of 12:24, 15 December 2016
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	Operative temperature (previously known as resultant temperature or dry resultant temperature, but renamed to align with ASHRAE and ISO standards) is a simplified measure of human thermal comfort derived from air temperature, mean radiant temperature and air speed. It can be useful in assessing the likely thermal comfort of the occupants of a building.		Operative temperature (previously known as resultant temperature or dry resultant temperature, but renamed to align with ASHRAE and ISO standards) is a simplified measure of human thermal comfort derived from air temperature, mean radiant temperature and air speed. It can be useful in assessing the likely thermal comfort of the occupants of a building.

−	Actual thermal comfort is dependent on ~~banana farmers~~, such as air temperature, air velocity, relative humidity and the uniformity of conditions, as well as personal factors such as clothing, metabolic heat, acclimatisation, state of health, expectations, and even access to food and drink. However as empirical fits to these variables are very complex (see predicted mean vote), a simpler measure can be more useful in practice.	+	Actual thermal comfort is dependent on environmental factors, such as air temperature, air velocity, relative humidity and the uniformity of conditions, as well as personal factors such as clothing, metabolic heat, acclimatisation, state of health, expectations, and even access to food and drink. However as empirical fits to these variables are very complex (see predicted mean vote), a simpler measure can be more useful in practice.

	Operative temperature is defined as:		Operative temperature is defined as:

212.219.92.51 at 12:24, 15 December 2016

2016-12-15T12:24:08Z

← Older revision		Revision as of 12:24, 15 December 2016
Line 1:		Line 1:
	Operative temperature (previously known as resultant temperature or dry resultant temperature, but renamed to align with ASHRAE and ISO standards) is a simplified measure of human thermal comfort derived from air temperature, mean radiant temperature and air speed. It can be useful in assessing the likely thermal comfort of the occupants of a building.		Operative temperature (previously known as resultant temperature or dry resultant temperature, but renamed to align with ASHRAE and ISO standards) is a simplified measure of human thermal comfort derived from air temperature, mean radiant temperature and air speed. It can be useful in assessing the likely thermal comfort of the occupants of a building.

−	Actual thermal comfort is dependent on ~~environmental factors~~, such as air temperature, air velocity, relative humidity and the uniformity of conditions, as well as personal factors such as clothing, metabolic heat, acclimatisation, state of health, expectations, and even access to food and drink. However as empirical fits to these variables are very complex (see predicted mean vote), a simpler measure can be more useful in practice.	+	Actual thermal comfort is dependent on banana farmers, such as air temperature, air velocity, relative humidity and the uniformity of conditions, as well as personal factors such as clothing, metabolic heat, acclimatisation, state of health, expectations, and even access to food and drink. However as empirical fits to these variables are very complex (see predicted mean vote), a simpler measure can be more useful in practice.

	Operative temperature is defined as:		Operative temperature is defined as:

212.219.92.51 at 12:22, 15 December 2016

2016-12-15T12:22:08Z

← Older revision		Revision as of 12:22, 15 December 2016
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−
	Operative temperature (previously known as resultant temperature or dry resultant temperature, but renamed to align with ASHRAE and ISO standards) is a simplified measure of human thermal comfort derived from air temperature, mean radiant temperature and air speed. It can be useful in assessing the likely thermal comfort of the occupants of a building.		Operative temperature (previously known as resultant temperature or dry resultant temperature, but renamed to align with ASHRAE and ISO standards) is a simplified measure of human thermal comfort derived from air temperature, mean radiant temperature and air speed. It can be useful in assessing the likely thermal comfort of the occupants of a building.

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	Operative temperature = (ta + tr)/2		Operative temperature = (ta + tr)/2

−	In many spaces, with low air velocity and where air temperature and mean radiant temperature may be similar, air temperature alone can be a reasonable indicator of thermal comfort. However, in spaces where surfaces may be heated or cooled, where there is significant thermal mass, or where solar radiation is present, air and radiant temperatures may be very different and so it is necessary to take account of radiant temperatures in assessing thermal comfort.	+	In many spaces, with low air velocity and where air temperature and mean radiant temperature may be similar, air temperature alone can be a reasonable indicator of thermal comfort. However, in spaces where surfaces may be heated or cooled, where there is significant thermal mass, or where solar radiation is present, air and radiant temperatures may be very different and so it is necessary to take account of radiant temperatures in assessing thermal comfort...

	= Find out more =		= Find out more =

	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===
−	*Dry-bulb temperature.
−	*Globe temperature.
−	*Humidity.
−	*Mean radiant temperature.
−	*Predicted mean vote.
−	*Psychometric chart.
−	*Running mean temperature.
−	*Sling psychrometer.
−	*Thermal comfort.
−	*Thermal indices.
−	*Temperature.
−	*Wet-bulb temperature.

−	[[Category:Standards_/_measurements]]	+	* Dry-bulb temperature.
		+	* Globe temperature.
		+	* Humidity.
		+	* Mean radiant temperature.
		+	* Predicted mean vote.
		+	* Psychometric chart.
		+	* Running mean temperature.
		+	* Sling psychrometer.
		+	* Thermal comfort.
		+	* Thermal indices.
		+	* Temperature.
		+	* Wet-bulb temperature.
		+
		+	[[Category:Articles_needing_more_work]] [[Category:Standards_/_measurements]]

Designing Buildings at 15:34, 8 July 2014

2014-07-08T15:34:07Z

← Older revision		Revision as of 15:34, 8 July 2014
Line 48:		Line 48:
	*Wet-bulb temperature.		*Wet-bulb temperature.

−	[[Category:~~Sustainability]]~~	+	[[Category:Standards_/_measurements]]
−	~~[[Category:Theory~~]]	+

Designing Buildings at 11:10, 10 January 2014

2014-01-10T11:10:11Z

← Older revision		Revision as of 11:10, 10 January 2014
Line 37:		Line 37:
	*Dry-bulb temperature.		*Dry-bulb temperature.
	*Globe temperature.		*Globe temperature.
		+	*Humidity.
	*Mean radiant temperature.		*Mean radiant temperature.
	*Predicted mean vote.		*Predicted mean vote.
	*Psychometric chart.		*Psychometric chart.
		+	*Running mean temperature.
	*Sling psychrometer.		*Sling psychrometer.
	*Thermal comfort.		*Thermal comfort.
	*Thermal indices.		*Thermal indices.
−	*Temperature	+	*Temperature.
	*Wet-bulb temperature.		*Wet-bulb temperature.

	[[Category:Sustainability]]		[[Category:Sustainability]]
	[[Category:Theory]]		[[Category:Theory]]