Variable Refrigerant Flow – VRF Technology

A look at the new HVAC technology.

VRF (Variable Refrigerant Flow) Technology

VRF stands for Variable refrigerant flow technology. It is an innovative technology in HVAC domain.

In this technology, multiple indoor units can be clubbed with a single outdoor unit, and this technology provides only the minimum amount of refrigerant needed at any one time in each zone connected with the HVAC system thus enabling individual HVAC control of the conditioned space.

This system, works on a variable speed, and it allows a greater roam for energy efficiency by providing higher COP (Coefficient of performance) at part loads.  Resulting in higher energy savings

If we see, VRF/ VRV’s origins, this technology was invented in Japan in 1982 by Daikin Company. And Daikin has patented this technology with the name of VRV or Variable refrigerant volume.

The working principle in its very basic, is large outdoor coupled with multiple indoors, where each indoor unit will have an LEV (electronic liquid expansion valve) to control its refrigerant supply to match the demand of the zone it serves. In this way VRF serves its purpose to circulate variable amount of refrigerant, as per the zone requirements.

The VRF technology has come a long way incorporating many technology upgradations, like optimized heat exchangers, innovative control technologies, inverter compressor to name a few.

In nut-shell, it is a very energy efficient technology, providing optimized energy savings and enabling individual climate control, with flexibility in layout.

February 27, 2018

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