Air Conditioning Systems-1
Air Conditioning Systems-1
Air Conditioning Systems-1
Conditioning
Dr.(Mrs.) K.T.K.Muthumali DeSilva
Department of Mechanical and Manufacturing Engineering
Air Conditioning Systems
Introduction
Supply and maintain desirable internal atmospheric conditions for human
comfort, irrespective of thermal conditions.
Factors affecting comfort air conditioning:
Temperature of air
Humidity of air
Purity of air
Motion of air
Equipments used in air conditioning system:
- Circulation fan - Supply outlets
- Air conditioning unit - Return outlets
- Supply duct - Filters
DMME_FoE_UoR 3
Classification of air conditioning systems
According to the purpose
Comfort air conditioning system
Industrial air conditioning system
According to season of the year
Winter air conditioning system
Summer air conditioning system
Year-round air conditioning system
According to arrangement of equipment
unitary air conditioning system
Central air conditioning system
DMME_FoE_UoR 4
Winter/ summer air conditioning system
DMME_FoE_UoR 5
Room Sensible Heat Factor (RSHF)
𝑹𝒐𝒐𝒎 𝑺𝒆𝒏𝒔𝒊𝒃𝒍𝒆 𝑯𝒆𝒂𝒕(𝑹𝑺𝑯)
𝑹𝑺𝑯𝑭 =
𝑹𝒐𝒐𝒎 𝑻𝒐𝒕𝒂𝒍 𝑯𝒆𝒂𝒕(𝑹𝑻𝑯)
𝑬𝑹𝑺𝑯 𝑬𝑹𝑺𝑯
𝑬𝑹𝑺𝑯𝑭 = =
𝑬𝑹𝑻𝑯 𝑬𝑹𝑺𝑯 + 𝑬𝑹𝑳𝑯
𝑹𝑺𝑯 + 𝑶𝑨𝑺𝑯
=
𝑹𝑺𝑯 + 𝑶𝑨𝑺𝑯 + (𝑹𝑳𝑯 + 𝑶𝑨𝑳𝑯)