Important features of VRF VRV systems
What are the differences between VRF and VRV solution air conditioners? Many who ask this particular question are fond of misinterpreting the two as if they are 2 different HVAC technologies. In actual fact, the two names are 2 different terms used for the same form of roof top systems based on HVAC technology.
The very first vrv HVAC systems were based on inverter technology compressors and they were invented by Daikin as far back as early 1980s. Daikin is a technology leader in HVAC industry and he registered the VRV term, as an official trademark.
VRV stands for Variable Refrigerant Volume. Other companies using this same HVAC system however call it VRF, which stands for Variable Refrigerant Flow. However, people tend to use VRF more than they use VRV, making the former to be commoner. In this write-up, we will be using the two names interchangeably since they are the same.
So, what is vrf air conditioning system?
It has similarity to the Air Conditioning Systems in Rolls Royce. The technology with which it is built is sophisticated and it is based on a several principles.
The vrf air conditioning system makes use of refrigerant only as its cooling material. Some other air conditioning systems, on the other hand, make use of chilled water system. In the latter air conditioning system, the refrigerant takes up the task of both cooling and heating the water that gets circulated throughout the air conditioning system.
The inverter compressor included in the vrv air conditioning system, allows reduction of power consumption using partial cooling or heating loads. Also, its indoor unit is included with many air handlers on the refrigerant loop or circuit. The air conditioning system has the modular expansion ability too. This makes it applicable for especially large projects, which can grow from stage to stage.
The vrv air conditioning system is made up of an indoor unit and an outdoor unit. The indoor unit is sometimes mistakenly referred to as fan coils, while the outdoor unit comprises one or multiple compressors. Other components of the roof top systems are communication wiring, Refnet Joints and refrigerant piping. The piping runs from the outdoor to all the indoor units.
The communicating wire in the VRV and VRF solutions is made up of 2 wired cables. They are chained from the indoors to the outdoor units. They therefore create a kind of internal closed loop network. This wiring is the essential part of its installation.
Each of the indoor units is controlled by wired control panel built into it. Wireless remote too can be used to control it though. Aside from wireless remote, it can also be controlled via centralized controllers. This latter form of control enables controlling the indoor units all from the same location.
How it functions
The VRV and VRF solution have their operation logic fully built-in right inside the system and it is proprietary for any VRF manufacture. The system receives input from the end user, who controls it in line with desired cooling temperature.