ASHRAE 55-2010 PDF

ASHRAE 55-2010 PDF

ANSI/ASHRAE Standard , Thermal Environmental Conditions for Human Occupancy. • Addendum p: Aligns Section with the definition of average. ANSI/ASHRAE Standard (Supersedes ANSI/ASHRAE Standard ). Includes ANSI/ASHRAE addenda listed in Appendix |. o) ASHRAE. Standard — Thermal Environmental Conditions for Human Occupancy( ANSI approved).

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For an occupant-controlled naturally conditioned space, the exceedance hours are the sum of asjrae when the operative temperature falls outside of the lower and upper boundaries of the comfort zone.

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. This table can be used together with the previous one, so that one can add or subtract the clothing ensemble from the clo value of each garment.

One has to keep in mind that the results from point-in-time surveys are only effective during the time when the surveys were solicited. Views Read Edit View history. So far, all the clothing insulation value can be used when the occupant is standing. As described within the standard: Please first verify your email before subscribing to alerts. If these requirements are met and the environmental conditions inside the building fall within the indicated ranges, then compliance is achieved.

As the voice of the U. For the first, it is not correct to use the average clothing insulation value to determine the desired thermal conditions for all occupants. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. When extracting environmental ashtae from the Building Administration System, one should evaluate the location, height, and time step of the sensors based on the previous suggestion.

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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.

Standard 55 – Thermal Environmental Conditions for Human Occupancy

And it is also not valid when occupants wear clothing that is highly impermeable to moisture transport. The measured results should be evaluated against the adjusted comfort zone for the specific building. Except sedentary activities, metabolic rate for all other activities is likely to have range of zshrae. If the document is revised or amended, you will be notified by email. Heating, ventilating, and air conditioning Building engineering Heat transfer Architecture Architecture occupations.

The section sets provisions for increasing the upper air temperature limit at elevated air speeds above 0. The standard suggests that the time of measurements should last two or more hours long, and it should also be a representative time of the year for this specific building. Generally, the evaluation of comfort in existing buildings can be performed from two perspectives: The graph is valid for prevailing mean temperatures between 10— Measuring time step should be no more than five minutes for air temperature, mean radiant temperature, and humidity, ashrwe no more than three minutes for the air speed.

In the standard was updated with more extensive information on asurae protocols and an expanded definitions section.

To demonstrate compliance the following must be documented, where applicable. There is a variety of means to determine the insulation provided by clothing.

By using this site, you agree to the Terms of Use and Privacy Policy. The survey shall be distributed to the entire occupancy or representative part of the occupancy.

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Ashrxe from ” https: For satisfaction surveys, the thermal satisfaction scale shall end with choices: Retrieved 24 November In general, body motion decreases the clothing insulation by pumping air through clothing.

The most recent version of the standard was published in Adaptive model asgrae a model that relates indoor design temperatures or acceptable temperature ranges to outdoor meteorological or climatological parameters. To evaluate the thermal comfort over a period of time in 55-010 mechanically conditioned space, the exceedance hours are the sum of all the hours when the absolute value of PMV is greater than 0.

For occupant-controlled naturally conditioned spaces, the measured results shall be check with the comfort zone established by adaptive model. This approximation is an equation that relates the clothing insulation with the metabolic rate. Both of these sections are clarified and streamlined for use by owners and third-party rating systems.

ANSI/ASHRAE Standard – Thermal Environmental Conditions for Human Occupancy

SinceStandard 55 has been rewritten with a renewed focus on application of the standard by practitioners and use of clear, enforceable language. As metabolic rates increase over 1. It was revised in,and Clothing insulation refers to the heat transfer of the entire body, which includes the uncovered parts, such as hands and heads.

You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. The comfort zone boundaries must be adjusted to the air movements, and the zone conditions should be adjusted to avoid local thermal discomfort.