ASHRAE 55-2004 PDF
Human Occupancy. ANSI/ASHRAE Standard Web site, http://www. , or in paper form from the Manager of Standards. The latest edition of . ANSI/ASHRAE Standard Thermal Environmental Conditions for Human Occupancy is an .. 5 December ^ Jump up to: ASHRAE Standard 55 ( ). ANSI/ASHRAE Standard 3. It is intended that all of the criteria in this standard be applied together since comfort in the indoor environment is.
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For occupant-controlled naturally conditioned spaces, the measured results shall be check with the comfort zone established by adaptive model. This page 55–2004 last edited on 12 Septemberat The graphic method utilizes an overlay on a psychrometric chart to indicate the operative temperatures and humidity at which thermal comfort is achieved in the winter 1.
And this equation is only valid when the metabolic rate is between 1. This section of the standard is applicable for the design of buildings. ashrse
There should be at least seven points on the scale ending with “very acceptable” and “very unacceptable. For such spaces, the indoor and outdoor air temperature and mean radiant temperature and the air speed need to be measured. When occupant is sitting, one has to realize the insulation effect of the chair, and the decrease of insulation due to compression of the air in the clothing.
Adaptive model is a model that relates indoor design temperatures or acceptable temperature 555-2004 to outdoor meteorological or climatological parameters.
Thus, it only provides an approximation of the clothing insulation value of a moving person. It was first published inand since has been updated every three to six years. This is the energy produced from a unit skin surface area of an average person seated at rest. After the body of the standard there are 11 informative appendices.
For occupant-controlled naturally conditioned space, the adaptive model shall be used to determine the thermal comfort boundaries. It was revised in,and There is a function to determine the representative clothing insulation at ashgae segment.
In order to achieve acceptable results, the standard also suggests the minimum equipment accuracy based the current industry standard.
ASHRAE 55 – Wikipedia
Heating, ventilating, and air conditioning Building engineering Heat transfer Architecture Architecture occupations. If these requirements are met and the environmental conditions inside the building fall within the indicated ranges, then compliance is achieved. In the first form, different individuals wear different clothing due to factors that are not related to thermal conditions, and the second form is opposite.
From Wikipedia, the free encyclopedia. One can also take into wshrae the posture of the occupants. The third method is to add all the clo value of each garment to match the clothing ensemble in question.
First, one can estimate the clothing insulation from the table provided in section five. In the ashrqe included the following changes. These values are valid for an average adult with surface skin area of 1.
Interpretations for Standard 55-2004
Operative temperatures may not fluctuate more than 1. For a mechanically conditioned space at an instance in time, the PMV and SET model shall be used to establish the comfort zone, and the local thermal discomfort shall be evaluated against the limit posed this standard as well.
The most recent version of the standard was published in For satisfaction surveys, the thermal satisfaction scale shall end with choices: Retrieved 24 November There are two cases when evaluating thermal comfort: And it is also not valid when occupants wear clothing that is highly impermeable to moisture transport. When such measurement is not feasible, this standard provides four methods to determine the clothing insulation.
The applicability of the cooling effect of air ahsrae was expanded to apply ashrad naturally conditioned spaces. The standard reminds the users that they should use their own judgment to match the activities being considered to the comparable activities in the table. In the standard was updated with more extensive information on measurement protocols and an expanded 55-2004 section.
Compliance is achieved if the conditions provide thermal neutrality, measured as falling between For humidity ratios above 0. As metabolic rates increase over 1.