Required rest or relaxation time related to working time and power expenditure can be estimated as:
tr = tt (qt - qm) / (qt - qr) (1)
tr = required relaxation or rest time (minutes)
tt = task or work time (minutes)
qt = task or work power consumption (W, watts)
qm = maximum power consumption level in a day with no recovery requirement (W, watts) (approximately 350 Watts for most male workers, approximately 300 W for most female workers)
qr = resting power consumption (W, watts) (commonly between 70 - 100 W)
Example - Required Relaxation Time
Required rest time for a male worker in very heavy work with task power consumption 600 W, resting powewr 100 W and task time 60 min, can be calculated as
tr = (60 min) ((600 W) - (350 W)) / ((600 W) - (100 W))
= 30 min
Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more.
Carbon Dioxide emission from persons vs. activity.
Human metabolism at low and high activity with different levels of clothing.
Gaseous polutants emissions from human bodies.
Composition of the human body.
Human work effort levels vs. energy expenditure and associated heart rates.
Heat gain from persons in air conditioned spaces - in btu/hr.
Fresh air is required for respiration and for transport of heat and vapor emitted from the human body.
Metabiolic Rate - Met - is used as a measuring unit for human body heat or power production.
Human metabolic heat gain in air conditioned rooms.
Heat production from the human body vs. activity.