calcRT {comf}

Required recovery time

Description

Function to calculate Required recovery time, RT in hours.

Usage

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

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]

Value

returns required recovery time in [hours]

Note

The authors disclaim all obligations and liabilities for damages arising from the use or attempted use of the information, including, but not limited to, direct, indirect, special and consequential damages, and attorneys' and experts' fees and court costs. Any use of the information will be at the risk of the user.

Author(s)

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

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

calcRT(90,0,25,25,8,0.2,0.4,50,1.5)