ac sys

Air conditioning systems

Air conditioning systems

• often referred to as aircon, AC or A/C• process of altering the properties of air (primarily

temperature and humidity) to more favourable conditions, typically with the aim of distributing the conditioned air to an occupied space to improve comfort.

• refer to any form of technology, heating, cooling, de-humidification, humidification, cleaning, ventilation, or air movement, that modifies the condition of air.

38.2 Comfort AC System

• Temperature of airComfort Condition – 21C & 56% Relative Humidity

• Humidity of air for Summer AC - Relative Humidity>60% for Winter AC - Relative Humidity< 40%

• Purity of air• Motion of air

38.4 Equipment used in AC

• Circulation Fan• AC Units• Supply Ducts• Supply Outlets• Return Outlets• Filters

38.4 Equipment used in AC

Comfort Condition – 21C & 50% Relative Humidity

Sensible Heat FactorFor residence or private office - 0.9For restaurants or busy office – 0.8For auditorium or cinema hall– 0.7Ball room dance Hall – 0.6

Winter AC

summer AC