8 Reasons to choose a VRV  /  VRF HVAC system in India

VRF can easily be related to as the “Rolls Royce” of Air Conditioning Systems. It’s a very sophisticated technological air conditioning system, based on several principles:

1. Refrigerant only – where refrigerant is the only coolant material in the system (in contrary to the chilled water systems, where refrigerant is used for cooling/heating the water that is circulated throughout the whole system).
2. Inverter compressors that allow lowering power consumption with partial cooling/heating loads.
3. Several air handlers (indoor units) on the same refrigerant loop / circuit.
4. Ability of modular expansion (especially applicable for large projects, that can grow in stages).

1. ENERGY EFFICIENCY. VRV / VRF HVAC systems use less energy for several reasons. The system is designed to provide exactly the amount of cooling needed for the current conditions, which means it runs less frequently and at a lower capacity. The VRV / VRF HVAC system is also designed to capture heat from the cooling process and reuse it in other areas that may need heating.

2. QUIET OPERATION. In a VRV / VRF HVAC system, the noisier condensing unit is typically outside, and the indoor air handlers are smaller and quieter than a traditional split system.

3. HEAT AND COOL SIMULTANEOUSLY. The VRV / VRF HVAC system captures residual heat absorbed from the air during the cooling process, and redirects that heat to other parts of the building that need heat. That means you can have air conditioning in the living room for a party, while you heat the bedroom where the baby is sleeping. Or you can have heat in the winter for cooler window offices, and air conditioning in the central conference room for a large meeting.

4. CONSISTENT COMFORT. The VRV / VRF HVAC system’s compressor can detect the precise requirements of each zone, and send the precise amount of refrigerant needed to do the job. As a result, each area of your space is consistently comfortable with well-controlled humidity and no hot or cold spots.

5. LESS DOWNTIME. Since the VRV / VRF HVAC system is designed to run only when needed and under partial-load conditions, there is less wear and tear on the parts. That means fewer breakdowns. Also, if something goes wrong with one air handler, often the others are unaffected. That means your whole space won’t be without air conditioning all at once.

6. REQUIRES LESS SPACE. Since the air handlers are smaller and VRV / VRF HVAC systems don’t usually require ducts, they don’t require as much wall and ceiling space for the equipment. That means you get to keep those gorgeous high ceilings in your apartment.

7. MODERN CONTROLS. For residences, you can take advantage of mobile control technology that lets you adjust temperature settings for each zone from your mobile device. For commercial settings, the VRV / VRF HVAC system’s built-in controls may allow you to skip purchasing expensive building management software.

8. LESS SPACE FOR OUTDOOR. For outdoors you dont need to be worry as you were in normal split ac system. you can connect upto Fiftyfour Indoor units with single VRV / VRF system Circuite.

In cities, where space is at a premium and energy costs are high, residents and business owners are increasingly choosing VRF HVAC systems for these types of spaces:

• high-end residences including brownstone townhouses and luxury apartments

• restaurants

• retail stores

• office spaces

• anywhere that requires customized heating and cooling over multiple zones
• 
  
• For More Details Contact
• BRIGHTEN HVAC SERVICES
• D106, Lajpat Nagar -1, New Delhi, India.
• Mob- 9818947171
• Tel- 011-65187171
• email- info@brightenhvac.in

VRV / VRF System, BRIGHTEN HVAC SERVICES

• via- BRIGHTEN HVAC SERVICES,
• New Delhi, India

What’s the difference between VRV and VRF?

VRV or VRF ?

What’s the difference between VRV and VRF?

Many people who ask this question, mistakenly interpret it as 2 different HVAC technologies. Actually, those are two different terms for the same type of HVAC technology. Based on Inverter technology compressors, the first VRV HVAC systems were invented by Daikin during the early 1980’s. As a technology leader in the HVAC industry, Daikin had registered the VRV term (which stands for Variable Refrigerant Volume) as an official trademark. All other companies use VRF (Variable Refrigerant Flow) for their similar HVAC systems. Eventually, VRF is the more common term for thesetypes of systems, and this is the term that will be used for the rest of the article.

What is VRF?

VRF can easily be related to as the “Rolls Royce” of Air Conditioning Systems. It’s a very sophisticated technological air conditioning system, based on several principles:

1. Refrigerant only – where refrigerant is the only coolant material in the system (in contrary to the chilled water systems, where refrigerant is used for cooling/heating the water that is circulated throughout the whole system).
2. Inverter compressors that allow lowering power consumption with partial cooling/heating loads.
3. Several air handlers (indoor units) on the same refrigerant loop / circuit.
4. Ability of modular expansion (especially applicable for large projects, that can grow in stages).

Typical VRF system structure

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 outdoor to all indoors, using Refnet Joints (copper distributors in pipes) and communication wiring.

Communication wiring consists of a 2 wired cable, chained from the outdoor to all indoors, creating an internal closed loop network, that is an essential part of any VRF installation.

As for the Control, each indoor is controlled by its own wired control panel, while there are some possibilities for wireless remotes (IR) and centralized controllers, enabling controlling all indoors from one location.

How does VRF work?

The operation logic of the VRF is fully built-in inside the system and is proprietary for each  VRF 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 makes VRF systems so efficient, compared to the traditional water cooled systems, based on chillers and fan coils.

Now, let’s dive in, and see how it works in details. Let’s take as an example a typical VRF installation, with one outdoor unit and multiple indoors.

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.

This process is constantly occurring with any change, performed in the HVAC system.  As described, the VRF system is fully automatic, and regulates its power consumption based on the demand arrivingfrom the indoor units and outside prevailing conditions. User can have influence on the desired indoor comfort conditions, modifying: Operation mode (on/off), Operation state (Cool/Heat/Fan/Dry/Auto), setpoint temperature, fan speed (high/medium/low/auto). Controlling those parameters is the only thing required for proper operation, and the only thing that is required for proper integration with the VRF system.

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VRF System types

Cooling only systems (less popular) – those systems can only cool. Heating is not available. Fan and Dry modes are available for each indoor unit independently.

Heat Pump systems (most popular) – all the indoor units can either heat, or cool (not at the same time). Fan and Dry modes are available for each indoor unit independently.

Heat Recovery systems (less popular) – those systems are the most sophisticated ones, where cooling and heating may be available by each indoor unit, independently, at the same time.

• For More Details Contact
• Brighten HVAC Services
• D106, Lajpat Nagar -1, New Delhi, India.
• Mob- 9818947171
• Tel- 011-65187171
• email- info@brightenhvac.in

What is VRV / VRF HVAC System?

The latest generation in Air-Conditioning Systems incorporates advanced VRV/VRF technology that saves energy and is extremely quiet in operation. These systems are no longer as rare as they were in the past and are now getting the attention they deserve together with increased market share.

The most prominent manufactures of such Air-Conditioning systems are Japanese with companies like: Daikin, Mitsubishi Electric, Mitsubishi Heavy VRF, Fujitsu, Hitachi, Sanyo / Panasonic and Toshiba. Daikin for instance, was the first company to introduce this technology, called ‘VRV’ (Variable Refrigerant Volume). All other HVAC manufacturers followed Daikin with their own version of the technology called ‘VRF’ (Variable Refrigerant Flow). Additional players outside of Japan producing VRF air- Conditioning systems are Koreans with companies like: LG and Samsung with other large players from China as Gree, Midea and Haier.

VRV / VRF Air-Conditioning systems have been distributed and installed all over the globe for about 35 years. At the start their market penetration was slow but has increased dramatically in recent years once individuals and companies began to understand the significant energy savings of 30% and even higher, these systems may provide.
Countries in Europe, Far- East and South East Asia, with China leading by far, have been world leaders on the number of systems installed and increasing market share compared to those in the U.S. The U.S. started embracing the technology within the last 5 - 7 years with a significant growth in usage every year.
Realizing the benefits of these systems, leading Air-Conditioning companies in N.A have started to use the technology by forming alliances with existing manufacturers from Japan and Korea. For instance, Johnson Control with Sanyo / Panasonicand Hitachi; Carrier has formed a joint operation in the States with Toshiba naming it: Carrier-Toshiba and Trane allied with Samsung to introduce their OEM VRF version.
As the U.S. started its economic recovery following the crisis that hit the U.S. in 2008, it is now possible to notice the growing penetration of VRV/VRF Systems in the U.S market; a fact that was firmly confirmed by Will Scott a Sales Manager for Mitsubishi in the U.S. already in 2010: " VRF shipments have continued to enjoy double-digit growth throughout the economic downturn. And as more engineers and contractors have successfully applied VRF across a wider spectrum of market segments, we expect their comfort level with VRF to translate into accelerated growth as we begin our economic recovery,” (achrnews: Nov 22 2010)

VRV HVAC System

VRV / VRF / Split Air-Conditioning control and Monitoring

VRV and VRF Air-Conditioning systems along with Splits from the same manufacturers are more sophisticated in their control systems incorporating built-in communication means, unlike the traditional Central and Split Air- Conditioning systems that typically incorporate only a basic form of on/off control logic. The control and monitoring of VRV / VRF and their Split Air - Conditioning Systems is done with solutions provided by the HVAC companies who offer Central Controllers, Communication Gateway / Converters and thermostats to control and monitor outdoor / indoor units on issues like: On /Off Control, Cool, Heat, Fan, Dry Mode selection, Temperature set, Fan speed, Swing, Filter reset, Group operation, (all On all Off), Failure Codes etc.'
Communication protocols of VRV / VRF Air-Conditioning are not published or disclosed by the manufacturers, and each maintains its own unique protocol. This situation limits the supply of control solutions only to those offered by the manufacturers preventing third party suppliers from competing and offer solutions with better design, functionality and pricing to accommodate today's modern house design and advanced communication means.