Determine whether the following conditions are expected to be comfortable for li

Question

Determine whether the following conditions are expected to be comfortable for light office work. Summer: air temperature = radiant temperature = 23 degree C (73.4 degree F), relative humidity = 60 percent. Summer: air temperature = 22 degree C (71.6 degree F) and radiant temperature = 28 degree C (82.4 degree F) (assume that the convective and radiative heat transfer coefficients are equal), relative humidity = 30 percent. Winter: air temperature = radiant temperature = 20 degree C (68 degree F), relative humidity = 30 percent. (5)

Explanation / Answer

there are lot of heat indexes for calculating this some are THI = 0.8°Ta + ((relative humidity/100)*(Ta - 14.3)) + 46.4, where Ta = temperature, °C. HI = -42.379 + 2.04901523(Tf) + 10.14333127(RH) - 0.22475541(Tf)(RH) -6.83783x10**(-3)*(Tf**(2)) - 5.481717x10**(-2)*(RH**(2)) + 1.22874x10**(-3)*(Tf**(2))*(RH) + 8.5282x10**(-4)*(Tf)*(RH**(2)) -1.99x10**(-6)*(Tf**(2))*(RH**(2)) Tf = actual temperature (fahrenheit) RH = relative humidity% or visit these links http://www.healthyheating.com/solutions.htm#.UHET5k3Mhyw http://www.newton.dep.anl.gov/askasci/wea00/wea00375.htm http://donsnotes.com/reference/temperature-index.html

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