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It is defined as per unit of skin surface area which equals to 58.2 W/m 2 (18.4 Btu/h·ft 2). This is the energy produced from a unit skin surface area of an average person seated at rest. [1] ANSI/ASHRAE Standard 55 provides a table of metabolic rate of different continuous activities
In addition to tables published by ASHRAE for select latitudes, a computer program called CLTDTAB, released in 1993 and no longer available, could have been used to generate custom CLTD/CLF/SCL tables for a specific zone type for any latitude and month. This used to allow the use of this method, without interpolation, for any area in the world. [1]
Thermal comfort calculations in accordance with the ANSI/ASHRAE Standard 55, [1] the ISO 7730 Standard [7] and the EN 16798-1 Standard [8] can be freely performed with either the CBE Thermal Comfort Tool for ASHRAE 55, [9] with the Python package pythermalcomfort [10] or with the R package comf.
Operative temperature is used in heat transfer and thermal comfort analysis in transportation and buildings. [10] Most psychrometric charts used in HVAC design only show the dry bulb temperature on the x-axis(abscissa), however, it is the operative temperature which is specified on the x-axis of the psychrometric chart illustrated in ANSI/ASHRAE Standard 55 – Thermal Environmental Conditions ...
The ASHRAE Handbook is the four-volume flagship publication of the nonprofit technical organization ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers [a]). This Handbook is considered the most comprehensive and authoritative repository of practical knowledge on the various topics that form the field of heating ...
A Assuming an altitude of 194 metres above mean sea level (the worldwide median altitude of human habitation), an indoor temperature of 23 °C, a dewpoint of 9 °C (40.85% relative humidity), and 760 mmHg sea level–corrected barometric pressure (molar water vapor content = 1.16%).
The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...
Discussion around the ASHRAE standard 62, Ventilation for Acceptable Indoor Air Quality led to the development of a more direct method of measuring air change effectiveness with the use of a tracer gas. [1] A tracer gas is a small amount of easily-detected gas which is mixed with air in order to study airflow patterns.