Chillers and HVAC are significantly different in several ways:
First of all, from the perspective of definition and working principle, a chiller, also known as a freezer, refrigeration unit, etc., is a multi-functional machine that mainly removes liquid vapor through compression or heat absorption refrigeration cycles to achieve refrigeration effects. Its core components include compressors, evaporators, condensers, and expansion valves. HVAC is a system that uses a series of processes and equipment to change the temperature, humidity, flow rate and cleanliness of the indoor environment to meet people’s comfort needs. An HVAC system typically consists of a cooling system, a heating system, a ventilation system, and a control system.
Secondly, from the perspective of purpose and function, chillers are mainly used to provide chilled water or cooling water to meet the cooling needs of various processes or equipment. HVAC is mainly used for the overall regulation of the indoor environment, including temperature, humidity, air flow and air quality, etc., and its temperature control range is usually between 17°C~27°C. Refrigeration and air conditioning are mainly used to reduce the indoor temperature and maintain a comfortable indoor temperature, usually the temperature is adjusted between 23°C~26°C.
Finally, from the perspective of application range, chillers have a wide range of applications in all walks of life, and their requirements vary depending on the application field. HVAC, on the other hand, is more used in buildings and indoor environments to meet people’s comfort needs.
To sum up, there are obvious differences between chillers and HVAC in terms of definition, working principle, purpose and function of use, and scope of application. In practice, it is necessary to select the appropriate equipment or system according to specific needs and scenarios.
