Variable Refrigerant Volume

Variable Refrigerant Volume

VRF - Variable Refrigerant Volume

VRV stands for Variable Refrigerant Volume and VRF stands for Variable Refrigerant Flow.

VRV is a multi-split type air conditioner for commercial buildings that uses variable refrigerant flow control to provide customers with the ability to maintain individual zone control in each room and floor in the building.

Typical VRV structure system.

A typical system consists of an outdoor unit (comprising one or multiple compressors), several indoor units (often and mistakenly called “fan coils”), refrigerant piping, running from the out door to all indoors, using Refnet Joints (copper distributers in pipes) and communication wiring.

VRV is a multi-split type air conditioner for commercial buildings that uses variable refrigerant flow control to provide customers with the ability to maintain individual zone control in each room and floor in the building. Typical VRV structure system.

A typical system consists of an outdoor unit (comprising one or multiple compressors), several indoor units (often and mistakenly called “fan coils”), refrigerant piping, running from the out door to all indoors, using Refnet Joints (copper distributers in pipes) and communication wiring.

VRV HVAC

How does VRV HVAC work.

The operation logic of the VRV is fully built-in inside the system and is proprietary for each VRV manufacturer..

The system gets inputs from the user (e.g desired comfort temperature) and from the surroundings (outside ambient temperature), and according to that data it implements its logic in order to get to the desired comfort conditions, utilizing optimal power consumptions.

The ability to adjust itself to the outdoor conditions is one of the main factors that make these systems so efficient, compared to the traditional water-cooled systems based on chillers and fan coils.

An example of how a VRV actually works

Console Air Conditioning Installations, Repairs and Maintenance

Let’s take as an example a typical VRV installation, with 1 outdoor and multiple indoor units.

At the beginning the system is in standstill condition. (everything is turned off ). Once a user turns one of the indoors “ON” By its local remote, the outdoor “gets noted” regarding it and starts working.

At this point it will examine the outdoor conditions(temperature) the operating indoor requirements (operation mode, set point temperature), and will operate the compressor at the exact level, required to comply with the indoor requirements.

When another indoor unit is turned on, the outdoor recalculates the requirements from all the indoors and will increase the compressor’s output, according to the required level of demand.