Building air conditioning and refrigeration system
Air conditioning refrigeration system cooling meter in a customs building in Hong Kong
Central air conditioning system components 1. The central air-conditioning system includes the main unit and the terminal system. According to the medium used to bear the indoor heat and humidity load, it can be divided into all-air system, all-water system, air-water system, and refrigerant system; according to the degree of centralization of air handling equipment, it can be divided into centralized and semi-centralized types; according to the source of the treated air, it can be divided into closed type, direct current type, and mixed type (primary return air, secondary return air). 2. The cooling water circulation part consists of cooling pumps, cooling water pipes, cooling water towers and condensers. When the chilled water circulation system performs indoor heat exchange, it will inevitably take away a large amount of indoor heat energy. This heat energy is transferred to the cooling water through the refrigerant in the main unit, causing the cooling water temperature to rise. The cooling pump presses the heated cooling water into the cooling water tower (outlet water), so that it exchanges heat with the atmosphere, and then returns it to the main unit condenser (return water) after the temperature is reduced. 3. Air collection part. The air conditioning system must use a portion of fresh outdoor air, that is, fresh air. The amount of fresh air intake is mainly determined by the service purpose and hygiene requirements of the air conditioning system. The fresh air intake, the fresh air duct of the air conditioning system and the fresh air dust filter device constitute the air intake part of the system.
