Transcript 下載/瀏覽

Thermal modeling of automobile cabin
 Dry air
 Ideal gas behavior
 Neglect potential energy in all parts.
 Neglect thermal losses between components
 Zero mechanical work in the cabin
 Negligible energy storage in air conditioning components
 Air parameters at standard conditions of 200C, 50% rh, sea
level.
Thermal modeling of automobile cabin
Mean air velocity versus blower speed and Mass flow rate versus blower speed.
Thermal modeling of automobile cabin
Thermal comfort
 Fundamental goal of HVAC is to provide comfort in any
condition. Comfort is vague. ASHRAE defines com- fort as
‘‘condition of mind that expresses satisfaction with the thermal
environment” [16].
Thermal comfort