comf (version 0.1.12)

calcIREQ: IREQ and Dlim

Description

Calculate minimal and neutral values of REQUIRED CLOTHING INSULATION (IREQ) and DURATION LIMITED EXPOSURE (Dlim).

Usage

calcIREQ(M,W,ta,tr,p,w,v,rh,clo)

Value

calcIREQ returns

IREQminimal

Lower bound of insulation required in [clo]

IREQneutral

Upper bound of insulation required in [clo]

ICLminimal

Lower bound of REQUIRED basic clothing insulation (ISO 9920) in [clo]

ICLneutral

Upper bound of REQUIRED basic clothing insulation (ISO 9920) in [clo]

DLEminimal

Lower bound of duration limited exposure in [hours]

DLEneutral

upper bound of duration limited exposure in [hours]

Arguments

M

a numeric value presenting metabolic energy production (58 to 400 W/m2) in [W/m2]

W

a numeric value presenting Rate of mechanical work, (normally 0) in [W/m2]

ta

a numeric value presenting ambiant air temperature in [degree C]

tr

a numeric value presenting mean radiant temperature in [degree C]

p

a numeric value presenting air permeability (low < 5, medium 50, high > 100 l/m2s) in [l/m2s]

w

a numeric value presenting walking speed (or calculated work created air movements) in [m/s]

v

a numeric value presenting relative air velocity(0.4 to 18 m/s) in [m/s]

rh

a numeric value presenting relative humidity [%]

clo

a numeric value presenting clothing insulation level in [clo]

Author

Developed by Ingvar Holmer and Hakan O. Nilsson, 1990 in java and transferred to R by Shoaib Sarwar. Further contribution by Marcel Schweiker.

Details

The function gives IREQ Insulation of clothing required to maintain thermal equilibrium of the body at specified levels of physiological stress.

References

ISO 11079, 2007-12-15, ERGONOMICS OF THE THERMAL ENVIRONMENT - DETERMINATION AND INTERPRETATION OF COLD STRESS WHEN USING REQUIRED CLOTHING INSULATION (IREQ) AND LOCAL COOLING EFFECTS

Examples

calcIREQ(116,0,-15,-15,8,0.3,0.4,85,2.5)