Talk:Operative temperature

redefine

I would like to replace the exisitng text with the more frequently used definition from the ASHRAE Handbooks.

Operative temperature is defined as a uniform temperature of a radiantly black enclosure in which an occupant would exchange the same amount of heat by radiation plus convection as in the actual nonuniform environment. In design, operative temperature can be defined as the average of the mean radiant and ambient air temperatures, weighted by their respective heat transfer coefficients. The instrument used for assessing comfort environment in terms of operative temperature is called a eupatheoscope.

$t_{o}={\frac {(h_{r}t_{mr}+h_{c}t_{a})}{h_{r}+h_{c}}}$

where

$h_{c}$ = convective heat transfer coefficient

$h_{r}$ = linear radiative heat transfer coefficient

$t_{a}$ = air temperature

$t_{mr}$ = mean radiant temperature

References

Thermal Comfort, ASHRAE Handbook, Fundamentals, Ch. 9, pg.3, 2009 ASHRAE Terminology, ASHRAE Handbook CD, 1999-2002

Any comments? RBean (talk) 12:12, 15 September 2010 (UTC)

I've uploaded the ASHRAE defintion, formula and citations. If you have any commments please post them on my talk page. RBean (talk) 22:29, 17 September 2010 (UTC)

To do

1. Develop text on difficulties assessing convective transfer. RBean (talk) 06:11, 18 September 2010 (UTC)