Số 10/357 Tam Trinh, P. Hoàng Văn Thụ, Q. Hoàng Mai, TP. Hà Nội

HVAC system in mechanical refrigeration

HVAC is the phrase stands for Heating, Ventilation and Air conditioning means is heating, ventilation and air-conditioning. HVAC sector is widely used in our daily life such as air-conditioning system (air conditioning), ventilation systems in buildings, offices. as well as in the energy industry, the great industries such as power plants, airplanes, spacecraft.

Heating device (heating): is the equipment used for the purpose is to generate heat (warm) for buildings. This can be done through the central heating system. A conventional heating system contains a boiler, furnace or heat pump to heat water, steam or air in a central location, such as the furnace room in a home or a mechanical room in a large building. The heat can be transferred by conduction, convection, or radiation.

Ventilation systems (Ventilation): ventilation is the process of changing or replacing air in any space to control temperature or remove any combination of moisture, odors, smoke, heat, dust, bacteria in the air , or carbon dioxide, and to replenish oxygen. Ventilation includes both the exchange of air with the outside as well as the circulation of air in the building. It is one of the most important factors to maintain indoor air quality can accept in the buildings. The ventilation method of a building can be divided into two types of ventilation is required as

exhaust fan

and natural ventilation.

Air conditioner (Air conditioning): a system


air, or a standalone air conditioner will help provide the required air and humidity for all or part of a building. When

installation of air conditioners

, fresh air is often sucked into the system by a vent into the heat exchanger section, create positive air pressure. The ratio of air to form fresh air can often be manipulated by adjusting the opening vents were designed. The amount of fresh air is about 10%.

The air conditioning and refrigeration are provided through the removal of heat from the system. The temperature can be removed can be through radiation, convection, or lead. Means of transmission power conditioner such as water, air, ice, and chemicals are known as refrigerants. A refrigerant is used, or in a heat pump system in which a compressor is used to drive the cooling cycle thermodynamics, or in a free-cooling system which uses the pump to circulate a cool (cold usually water or a mixture of glycol).


  • installation of air conditioners
  • exhaust fan
  • aircondition

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