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  • Writer's pictureKai Zhang

Comparison Between Modular Chillers and VRFs

Hi, today we will briefly introduce the comparison between modular chillers and VRF central air conditioning.


  • Working Principle:

The working principle of modular central air conditioning is that it generates air conditioning cold or hot water through the outdoor host, which is transported by the pipeline system to various end devices indoors; At the end device, cold or hot water exchanges heat with indoor air to generate cold or hot air, thereby eliminating the cold or hot load on the room. It is a type of air conditioning system that centrally generates cold or heat, but disperses the load of each room. The indoor end device of this system is usually a fan coil unit. At present, fan coil units can generally adjust their fan speed (or adjust the amount of water passing through the coil through a bypass valve) to regulate the cold or heat sent into the room. Therefore, this system can adjust each air-conditioned room separately to meet the different air conditioning needs of each room, and its energy-saving performance is also good.


VRF

The working principle of VRF central air conditioning. VRF, commonly known as "one to many", refers to an outdoor unit connected to two or more indoor units through piping, with air-cooled heat exchange on the outdoor side and direct evaporative heat exchange on the indoor side. VRF is an air conditioning system that uses refrigerant as the delivery medium. The outdoor unit is composed of an outdoor heat exchanger, compressor, and other refrigeration accessories, and the end device is an indoor unit composed of a direct evaporative heat exchanger and a fan. An outdoor unit can deliver refrigerant liquid to several indoor units through pipelines. By controlling the refrigerant circulation rate of the compressor and the refrigerant flow rate entering each indoor heat exchanger, the indoor cooling and heating load requirements can be timely met.


  • Advantages:

The advantages of modular chillers first and foremost, its high comfort can be balanced by four parameters: temperature (constant temperature, 18 degrees plus or minus 2 degrees in winter, 26 degrees plus or minus 2 degrees in summer), humidity (45% -70%), wind speed (less than 1.5 meters per second), and cleanliness (air freshness, not just the number of bacteria). Traditional air conditioning can only adjust temperature and is not constant temperature; Secondly, in terms of energy conservation and noise reduction: modular central air conditioning saves more than 30% of energy compared to traditional air conditioning, and the sound of air conditioning cannot be heard indoors; Finally, it has the advantages of aesthetics and space saving.


Modular-chiller

The advantages of VRFs are firstly that the air output is gentle and comfortable, and the cooling (heating) is fast and strong; Secondly, the indoor unit achieves centralized management, allowing for the operation of a single indoor unit or multiple indoor units to be started simultaneously, avoiding the problem of traditional central air conditioning with all doors open and high energy consumption, making it more energy-efficient; Finally, the VRF central air conditioning has a long service life, extremely low unit failure rate, and is basically self regulating and diagnosing, without the need for specialized maintenance. Moreover, the outdoor unit has a service life of up to 30 years, greatly saving maintenance costs.


The above is a comparison of the working principles and advantages of modular and VRF central air conditioning. We believe it has reference value for some consumers who want to have a detailed understanding. Of course, whether it is a modular central air conditioner or a VRF central air conditioner, there will inevitably be its own shortcomings. When choosing an air conditioner, consumers still need to consider their own factors comprehensively to seek the best choice.

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