Hybrid R32-Series simultaneous heating and cooling.
(Nominal 22.4 - 56kW cooling / 25 - 58kW heating).
VRF Now with R32 Refrigerant Building owners, facility managers and the construction industry have been looking for HVAC systems that deliver high operational efficiency whilst minimising the global warming potential of the refrigerants used within these systems.
The global community is in a race to lower its carbon footprint and decrease the rate of global warming before it is too late. As part of this drive, the Kigali Amendment to the Montreal Protocol ratified on the 3rd of October 2019, dictates the rate of phase down of HFC refrigerants for New Zealand as part of this strategy and will commence on the 1st of January 2020. It is estimated that this directive has the potential to avoid aggregate emissions of more than 90 gigatonnes CO2 e by 2050 – equivalent to two years of total global greenhouse gas emissions (US EPA 2016)!
The key to achieving this goal is the shift away from traditional refrigerants such as R410A. Replacing traditional refrigerants to those with a much lower GWP, will be a big step towards significantly reducing the future potential rate of rise in the earth’s temperature and the catastrophic effects that would have on our planet.
With the environmental pressure on R410A refrigerant increasing, Mitsubishi Electric’s commitment to reducing the environmental impact of air conditioning has seen the introduction of New Zealand’s first VRF (Variable Refrigerant Flow) solution that has utilised R32 refrigerant. Mitsubishi Electric has long been a pioneer in the world of air conditioning and the world’s first R32 Hybrid VRF product range puts the company at the forefront of the industry. The system utilises the low GWP refrigerant R32, providing a real solution that delivers high operational efficiency whilst minimising the Global Warming Potential of the refrigerants used within these systems.
Hybrid VRF is based on a 2-Pipe Heat Recovery VRF System but uses water as a heat exchange medium between the Hybrid Branch Controller and the indoor units.
As such, the system combines the comfort of a traditional hydronic system with the efficiency and ease of modern VRF air conditioning – giving you the best of both worlds.
NB: Image for representation only
This is the point where the refrigerant circuit transfers its energy to the sealed water system. There are two sets of Plate Heat Exchangers, both placed at opposite ends in the HBC. Both sets provide hot water in heating mode or cold water in cooling mode. During mixed mode, one set provides hot water while the other provides cold water to its respective flow header.
Each set of Plate Heat Exchangers has a water pump. This circulates the closed loop water system between the HBC and indoor units. The discharge flow rate from the pump is controlled by the Valve Block.
A Valve Block is connected between each flow and return port of the HBC.
This Valve Block has two features;
Expansion tank (field supplied) and water filling loop (field supplied)
All City Multi air source outdoor units have Blue Fin treatment applied as standard to protect the aluminium heat exchanger fins.
“BS” coating can be applied to the outdoor units as an option for additional protection in sea salt environments.
Hybrid VRF is suitable for various applications that require individual control (e.g., offices/hotels/hospitals/nursing homes) by using a centralized control. Similar to a VRF system easy installation allows greater layout flexibility due to the centrally mounted HBC.
Individual settings and simultaneous heating/cooling operation allow free selection of the operation mode. Further to this, mild air-conditioning provides a comfortable environment throughout your stay.
The requirement for simultaneous heating and cooling operation all year round is increasing along with the increase of electronic office equipment and diversification in use of space. An HVRF system can supply this demand with heat recovery technology.
The system can provide the appropriate levels of comfort simultaneously for the different air conditioning load requirements, such as medical offices, wards, rehabilitation rooms, and staff rooms.