Predicted mean vote - Revision history

Designing Buildings at 08:49, 22 September 2020

2020-09-22T08:49:51Z

← Older revision		Revision as of 08:49, 22 September 2020
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	* Wet-bulb temperature.		* Wet-bulb temperature.

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

Designing Buildings at 08:24, 1 March 2020

2020-03-01T08:24:38Z

← Older revision		Revision as of 08:24, 1 March 2020
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	The predicted mean vote (PMV) was developed by Povl Ole Fanger at Kansas State University and the Technical University of Denmark as an empirical fit to the human sensation of thermal comfort. It was later adopted as an ISO standard. It predicts the average vote of a large group of people on the a seven-point thermal sensation scale where:		The predicted mean vote (PMV) was developed by Povl Ole Fanger at Kansas State University and the Technical University of Denmark as an empirical fit to the human sensation of thermal comfort. It was later adopted as an ISO standard. It predicts the average vote of a large group of people on the a seven-point thermal sensation scale where:
−	*+3 = hot	+
−	*+2 = warm	+	* +3 = hot
−	*+1 = slightly warm	+	* +2 = warm
−	*0 = neutral	+	* +1 = slightly warm
−	*-1 = slightly cool	+	* 0 = neutral
−	*-2 = cool	+	* -1 = slightly cool
−	*-3 = cold	+	* -2 = cool
		+	* -3 = cold

	The properties measured and the maths required to create the empirical fit are very complicated, based on the deviation between heat loss and metabolic rate, and the equations generated only apply under constant conditions and at constant metabolic rates. However, as the conditions within the built environment will generally be within a small range, and the clothing, metabolic rates and so on of occupants can be predicted, standards have been produced indicating thermal conditions that will give a satisfactory predicted mean vote. For example, the ASHRAE Standard 55 Comfort Zone represents a predicted mean vote of of between -0.5 and +0.5 for buildings where the occupants have metabolic rates of between 1.0 met and 1.3 met and clothing provides between 0.5 clo and 1.0 clo of thermal insulation.		The properties measured and the maths required to create the empirical fit are very complicated, based on the deviation between heat loss and metabolic rate, and the equations generated only apply under constant conditions and at constant metabolic rates. However, as the conditions within the built environment will generally be within a small range, and the clothing, metabolic rates and so on of occupants can be predicted, standards have been produced indicating thermal conditions that will give a satisfactory predicted mean vote. For example, the ASHRAE Standard 55 Comfort Zone represents a predicted mean vote of of between -0.5 and +0.5 for buildings where the occupants have metabolic rates of between 1.0 met and 1.3 met and clothing provides between 0.5 clo and 1.0 clo of thermal insulation.

−	Fanger extended his concept to allow estimation of the predicted percent of dissatisfied people (PPD). The PPD increases as the predicted mean vote moves away from zero in either direction.	+	Fanger extended his concept to allow estimation of the predicted percent of dissatisfied people (PPD). The PPD increases as the predicted mean vote moves away from zero in either direction. For more information see: Predicted percentage dissatisfied.

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

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

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

Designing Buildings at 15:34, 8 July 2014

2014-07-08T15:34:40Z

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

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

Designing Buildings at 11:09, 10 January 2014

2014-01-10T11:09:37Z

← Older revision		Revision as of 11:09, 10 January 2014
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	= Find out more =		= Find out more =

−	=== Related articles on Designing Buildings Wiki ===	+	=== Related articles on Designing Buildings Wiki ===
	*Dry-bulb temperature.		*Dry-bulb temperature.
	*Globe temperature.		*Globe temperature.
		+	*Humidity.
	*Mean radiant temperature.		*Mean radiant temperature.
		+	*Operative temperature.
	*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:Theory]]		[[Category:Theory]]

Designing Buildings: Created page with " The predicted mean vote (PMV) was developed by Povl Ole Fanger at Kansas State University and the Technical University of Denmark as an empirical fit to the human sensation of t..."

2014-01-07T15:41:59Z

Created page with " The predicted mean vote (PMV) was developed by Povl Ole Fanger at Kansas State University and the Technical University of Denmark as an empirical fit to the human sensation of t..."

New page

The predicted mean vote (PMV) was developed by Povl Ole Fanger at Kansas State University and the Technical University of Denmark as an empirical fit to the human sensation of thermal comfort. It was later adopted as an ISO standard. It predicts the average vote of a large group of people on the a seven-point thermal sensation scale where:
*+3 = hot
*+2 = warm
*+1 = slightly warm
*0 = neutral
*-1 = slightly cool
*-2 = cool
*-3 = cold

The properties measured and the maths required to create the empirical fit are very complicated, based on the deviation between heat loss and metabolic rate, and the equations generated only apply under constant conditions and at constant metabolic rates. However, as the conditions within the built environment will generally be within a small range, and the clothing, metabolic rates and so on of occupants can be predicted, standards have been produced indicating thermal conditions that will give a satisfactory predicted mean vote. For example, the ASHRAE Standard 55 Comfort Zone represents a predicted mean vote of of between -0.5 and +0.5 for buildings where the occupants have metabolic rates of between 1.0 met and 1.3 met and clothing provides between 0.5 clo and 1.0 clo of thermal insulation.

Fanger extended his concept to allow estimation of the predicted percent of dissatisfied people (PPD). The PPD increases as the predicted mean vote moves away from zero in either direction.

= Find out more =

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

[[Category:Theory]]