equivalent temperature


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equivalent temperature

[i′kwiv·ə·lənt ′tem·prə·chər]
(meteorology)
The temperature that an air parcel would have if all water vapor were condensed out at constant pressure, the latent heat released being used to heat the air. Also known as isobaric equivalent temperature.
The temperature that an air parcel would have after undergoing the following theoretical process: dry-adiabatic expansion until saturated, pseudoadiabatic expansion until all moisture is precipitated out, and dry adiabatic compression to the initial pressure; this is the equivalent temperature as read from a thermodynamic chart and is always greater than the isobaric equivalent temperature. Also known as adiabatic equivalent temperature; pseudoequivalent temperature.
(thermodynamics)
A term used in British engineering for that temperature of a uniform enclosure in which, in still air, a sizable blackbody at 75°F (23.9°C) would lose heat at the same rate as in the environment.

equivalent temperature

An index similar to effective temperature, but not considering the effects of humidity.

equivalent temperature

The degree of comfort in the passenger cabin in terms of temperature effectiveness. It takes into account factors like cabin heat load, humidity, thermal inertia, and temperature distribution throughout the aircraft. The term is used in aircraft environmental system design.
References in periodicals archive ?
The UTCI is an equivalent temperature of an actual complex microclimate thermal condition incorporating temperature, humidity, wind speed, and solar and thermal radiation.
Since the thermal passenger models were operated at constant heat flux conditions, other than a real human, we had to subtract the difference between measured and norm (dashed lines, Figure 8) mean equivalent temperature for the sake of comparability.
ISO 14505-2:2006(E), Ergonomics of the thermal environment--Evaluation of thermal environments in vehicles--Part 2: Determination of equivalent temperature, International Organization for Standardization, Geneva, 2006.
k] represents model coefficients for the k distance to coast indicator variables (k = 1, 2); and [beta]1, [beta]2, and [beta]3 represent model coefficients for NDVI and UTCI; [delta] indicates the breakpoint equivalent temperature, in our case the 95th and 99th UTCI percentile.
Applications of a universal thermal index: physiological equivalent temperature.
Also, the equivalent temperatures at each surface are calculated based on the following equations:
Based on collected field data, the equivalent temperature difference corresponding to actual deformation due to environmental effects were quantified with FE based approach.
WCT: equivalent temperature of the lost energy in C (in other words a temperature of human body in which energy loss is almost H calories)
The fuel must be tested for various elements including methanol, water and sediment, kinematic viscosity, sulfated ash, oxidation stability, sulfur, copper strip corrosion, cetane and acid number, carbon residue, total and free glycerin, phosphorus, reduce pressure distillation temperature and atmospheric equivalent temperature.
2 Equivalent, standard and subjective temperature Equivalent temperature is calculated and defined like temperature in uniform thermic environment, at which, a heat loss equivalent to the heat loss in the real environment is caused.
05[degrees]C NETD (Noise Equivalent Temperature Difference) for the Ti55, on a high contrast 127mm colour display.

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