Method and apparatus for calculating predicted mean thermal sens

Details Method and apparatus for calculating predicted mean thermal sens Method and apparatus for calculating predicted mean thermal sens

1994-09-22

1995-07-25

Ramirez, Ellis B.

Boots, shoes, and leggings

374109, 236 91C, 364505, G01K 1300, G06F 1500

Patent

active

054368529

ABSTRACT:
According to a method and apparatus for calculating predicted mean thermal sensitivity which is used to control an air conditioning or heating unit, an operative temperature T.sub.0 is calculated on the basis of a radiant temperature Tr, an air temperature Ta, an air velocity Vair, coefficients b.sub.1 and b.sub.2, and a coefficient n according to the following equation: ##EQU1## Predicted mean thermal sensitivity PMV* is calculated on the basis of the operative temperature T0, the air temperature Ta, a relative humidity RH, a saturated water vapor pressure Pa*, a clothing thermal resistance Icl, a variable h.sub.0 (h.sub.0 =b.sub.1 +b.sub.2 .multidot.Vair.sup.n), and coefficients a.sub.1 to a6 according to the following equation: ##EQU2##

REFERENCES:
patent: 3751634 (1973-08-01), Madsen
patent: 5058388 (1991-10-01), Shaw et al.
patent: 5170935 (1992-12-01), Federspiel et al.
patent: 5333953 (1994-07-01), Kon
Ashrae Standard 55-1981, "Thermal Environmental Conditions for Human Occupancy", 1981, pp. 1-16.

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