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Introduction:

Have a more flexible choice with controlling your environment’s temperature with VRF AC’s. The ability to control every room’s temperature separately was achieved by the innovative Japanese company, Daikin Industries. Variable Refrigerant Flow, or VRF in short, has a self-explanatory name as it refers to its variable refrigerant flow ability. An air-conditioning system that has multiple evaporators which are also referred to as indoor units. The only refrigeration cycle that combines numerous evaporators of different capacities to a single condensing unit and works on achieving multiple, different temperature at once. In contrary to chilled water systems, VRF ACs use refrigerant as their only cooling material in the cycle. Using partial cooling and heating loads, VRF ACs decrease power consumption significantly which makes the most optimal and eco-friendly refrigeration cycle. Unlike the traditional DX ACs that only allows one temperature to be achieved, this technology offers several air handlers, or indoor units, to branch out from the same refrigerant loop. In addition to all this luxury, VRF cycles are easily expanded, which is the motive behind it being the number one choice for large projects that are expected to grow in the near future. The future of refrigeration cycle, the most luxurious choice, the eco-friendly choice, the smarter investment, Variable Refrigerant Flow AC’s are in the process of taking over Kuwait’s market.

Literature Review:

With such technology there is no doubt that the cost will be significantly higher than the traditional HVAC units, but with price comes quality. On the contrary to the popular opinion, VRF systems are actually pocket friendly. Looking into the future VRF AC reduces the electrical bill by a considerable amount, the smarter long-term investment. The cycle’s continuing energy savings and its guaranteed reliability alongside the customizable comfort pushes it to be the most rapidly growing cycle in the market. Cooling and heating simultaneously was never an option before VRF cycles, dual action can be attained using less energy and producing power at a more efficient rate than HVAC units. A component of the cycle, the inverter, controls the speed of the compressor by allowing the refrigerant flow rate to in increase or decrease on command, achieving superior comfort by the path of zoned controls. When the needed temperature is achieved, the indoor units distribute equal amounts of cooled and heated air in where needed.

VRF systems are well known in the current market for being the most efficient system using the least amount of energy possible. From superior comfort, energy efficiency, easy design, installation, and maintenance, flexibility in controlling your environment’s temperature, the VRF systems have no competitor. The latest solution to money saving and greater control of a space’s internal temperature, these units exceed expectation by working only at the required rate creating significant energy savings. Endless designs and sizes of fan coils are available for purchase which allows the user to customize their refrigeration cycle as needed. With this technology, heating and cooling simultaneously is no issue as VRF systems work as both heat pumps or recovery systems for locations where different heating needs are required at the same time and place. Efficiency does not only come in the form of energy savings with VRF systems, they also appear in practicality and style. Utilizing heating and cooling technology using an integrated design allows greater energy savings while giving occupants full control and flexibility with their choice of working the air conditioner or heater the specific areas in use.

A DC inverter is added to the compressor through the addition of an air conditioner inverter that supports variable motor speed which allows variable refrigerant flow rather than the traditional on/off operation. The ability of this system to operate at varying speeds allows the units to work only at the needed rate. This technology that is famously known for its heat recovery is the reason behind the simultaneous heating or cooling while the compressor load benefits from the internal heat recovery. According to Wikipedia.org “Energy savings of up to 55% are predicted over comparable unitary equipment”.

Looking at HVAC systems from a more traditional perspective, heat pumps are limited to only a two-pipe system while VRFs diversify into two or three pipe systems. In a heat pump, all of the zones must either be in heating or in cooling, a feature that forces occupants to be in an unfavorable environment. With VRF systems the heat extracted from zones that require cooling is reused in zones that require heating. This is implemented by the heating unit which comes in the form of a condenser which transfers sub-cooled liquid back to the line that is used for cooling. Cut down on energy, power, and coolant usage using this multifunctional, efficient system.

Features also vary with the VRF systems with the technique of cooling. VRF systems can be cooled using air or water. In the case of air cooling, VRF condenser units, the size of a large refrigerator, are placed outdoors so they can be exposed to air. Since air doesn’t have a high heat capacity, the calculated decision to place the heat exchanger outdoors was taken to transfer heat to the surrounding air. On the other hand, with water cooling, the condensing units are placed indoors and are much smaller in size, cooling takes place using a cooling tower.

As luxurious and modern this technology sounds, it has been used in Japan since the 1980’s. By 2007, VRF systems were used in half of midsize office buildings and took over 22% of large commercial buildings. This technology was invented by the well-respected company Daikin, one of Japan’s most innovative HVAC companies.

https://coolautomation.com/blog/vrv-or-vrf/

https://easyairconditioning.com/about/vrf-air-conditioning-systems/

http://www.hvacrbusiness.com/vrf-save-you-money-over-time.html

https://en.wikipedia.org/wiki/Variable_refrigerant_flow