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AndreasHolm am 28. März 2008 um 12:09 Uhr

2008-03-28T12:09:38Z

← Nächstältere Version		Version vom 28. März 2008, 14:09 Uhr
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	The factors that influence the thermal comfort are divided to primary and secondary ones:		The factors that influence the thermal comfort are divided to primary and secondary ones:

	* Primary Factors		* '''Primary Factors'''
			** Temperature and radiation (dry bulb, mean radiant)
			** Operative and resultant temperatures
			** Relative humidity
			** Air speed and turbulence
			** Clothing
			** Perception of thermal comfort

			other parameters such as state of health, level of physical activity, gender, working environment and individual preferences also influence perception of thermal comfort.

			* '''Secundary Factors'''
			** Nonuniformity of the environment
			** Age
	* ~~Secundary Factors~~		** Sex
			** Adaption
			** Seasonal and Circadian Rhythms

AndreasHolm am 28. März 2008 um 11:48 Uhr

2008-03-28T11:48:32Z

← Nächstältere Version		Version vom 28. März 2008, 13:48 Uhr
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	== Thermal Comfort ==		== Thermal Comfort ==

	'''~~According to~~ ASHRAE Standard 55:'''		'''ASHRAE Standard 55:'''
	''“Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment”''.		''“Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment”''.

	Although this definition is not very precise, it emphasizes the fact that a lot of parameters may be involved in order to achieve proper thermal conditions.		Although this definition is not very precise, it emphasizes the fact that a lot of parameters may be involved in order to achieve proper thermal conditions.

	'''~~According to~~ ASHRAE Fundamentals (2001):'''		'''ASHRAE Fundamentals (2001):'''
	''“in general comfort occurs when body temperatures are held within narrow ranges, skin moisture is low and the psychological effort of regulation is minimized”.''		''“in general comfort occurs when body temperatures are held within narrow ranges, skin moisture is low and the psychological effort of regulation is minimized”.''

AndreasHolm: Die Seite wurde neu angelegt: == Thermal Comfort == '''According to ASHRAE Standard 55:''' ''“Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment”...

2008-03-28T11:48:08Z

Die Seite wurde neu angelegt: == Thermal Comfort == '''According to ASHRAE Standard 55:''' ''“Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment”...

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== Thermal Comfort ==

'''According to ASHRAE Standard 55:'''
''“Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment”''.

Although this definition is not very precise, it emphasizes the fact that a lot of parameters may be involved in order to achieve proper thermal conditions.

'''According to ASHRAE Fundamentals (2001):'''
''“in general comfort occurs when body temperatures are held within narrow ranges, skin moisture is low and the psychological effort of regulation is minimized”.''

It is important to understand basic principals of the thermal interaction between the human body and the environment before studying the parameters that influence the thermal comfort.

=== Conditions of thermal comfort ===

Thermal sensation is the most important parameter in the perception of comfort. Air is the primary transport mechanism for thermal comfort while air speed and turbulence influences the sensation of cooling and draughts. High infiltration or unnecessary air change rates result in the loss of conditioned air and may prevent comfort conditions from being attained (AIVC).

The factors that influence the thermal comfort are divided to primary and secondary ones:

* Primary Factors

* Secundary Factors