Cooling and dehumidification of indoor air for thermal comfort . Any form of cooling, heating, ventilation or disinfection that modifies the condition of air .
AIR CONDITIONER -
An appliance, system, or mechanism . Stabilize the air temperature and humidity within an area , using a refrigeration cycle .
Types of Air Conditioning Systems - Window Air Conditioning System Split Air Conditioner System Packaged Air Conditioners Central Air Conditioning Plants Chilled-water and Cooling-tower AC Units
CENTRAL AIR-CONDITIONING- Central Air-conditioning applications are divided into two types - 1) Comfort 2) Process
COMFORT AIR-CONDITIONING Building indoor environment that remains relatively constant in a range preferred by humans despite changes in external weather conditions or in internal heat loads. Allows buildings to be taller . Comfort applications – Low-Rise Residential buildings High-Rise Residential buildings Institutional buildings Industrial spaces Transportation
PROCESS AIR-CONDITIONING Suitable environment for a process being carried out, regardless of internal heat and humidity loads and external weather conditions. The needs of the process that determine conditions, not human preference. Process applications – Hospital operating theatres Clean rooms for the production of integrated circuits, pharmaceuticals Aircraft air conditioning Food cooking and processing areas
Design features: Two stage compressor A condensing unit The evaporating unit – known as AHU Ducts Air conditioner filters Thermostats Auxiliary units – humidifier , preheater , air quality analyzer