Metabolic Heat Persons

Overview

Engineering reference data for Metabolic Heat Persons in thermodynamics.

Key Formulas

First Law

$\Delta U = Q - W$

Energy is conserved — heat added minus work done.

Ideal Gas Law

$PV = nRT$

Relates pressure, volume, and temperature of an ideal gas.

Heat Transfer

$Q = mc\Delta T$

Sensible heat transfer.

Carnot Efficiency

$\eta = 1 - T_C/T_H$

Maximum efficiency between two temperatures.

Variables

Symbol	Description	Unit
$U$	Internal energy	J
$Q$	Heat	J
$W$	Work	J
$P$	Pressure	Pa
$V$	Volume	m³
$T$	Temperature	K

Metabolic Heat Data

Definitions

• Sensible Heat ($Q_s$): The portion of metabolic heat transfer that causes a change in air temperature without a change in phase. It is transferred via convection and radiation.
• Latent Heat ($Q_l$): The portion of metabolic heat transfer associated with moisture (sweat) evaporation from the skin. It causes a change in the moisture content (humidity) of the air.

Notes

The provided data is based on older ISO and ASHRAE standards. For accurate and current design calculations, always consult the latest editions of these standards (e.g., ASHRAE Handbook - Fundamentals).

References

• Original Source