Mitsubishi Electric’s industry leading City Multi VRF technology is designed for today’s building needs. With emphasis placed on energy efficiency, adaptability, reliability and control, City Multi addresses the most current market issues. Utilising integrated air conditioning, hot water, ventilation and control solutions City Multi is the benchmark in VRF technology.
Striving to continually meet increasing demands of our customers, Mitsubishi Electric was the first in the industry to offer inverter-driven systems. Using inverter technology, systems produce precise output, matching exact requirements of any building. Working efficiently to ensure no valuable energy is wasted by over-heating or over-cooling; greatly reducing running costs.
COP or “Coefficient of Performance” is a measure of the useful energy a system can deliver compared to the energy it consumes. It is calculated by dividing the energy output by the energy input of a system. The higher the figure, the more efficient the system is deemed to be. Mitsubishi Electric VRF models, the world’s highest energy-efficient air conditioners, will undoubtedly reduce millions of tons of CO2 emissions.
Not only does Mitsubishi Electric provide some of the most efficient R2 series, simultaneous heating and cooling systems on the market, they have developed a high COP range of condensers as well. The PURY-EP range of condensers (available in eleven sizes) has a full load COP of 4.1 in cooling and 4.3 in heating.
If your client is after the highest efficiency possible for their project, then look no further than the Mitsubishi Electric high COP, EP series of air conditioning.
Mitsubishi Electric’s YJM-A range provides precise control of energy input, through its Intelligent Power Module (IPM) technology. Using this technology it is possible to closely match the building requirements, achieving more accurate control of the occupied space. Using incremental 1Hz steps of capacity control, the amount of power input required is significantly reduced, resulting in greatly improved COP’s.
IPM technology ensures effective performance under partial load conditions, a condition that most systems will be in for the majority of their normal working life. By taking account of the efficiency at both part load and peak load conditions, R410A City Multi is designed to provide unbeatable year-round efficiency.
The unique Heat Interchange Circuit (HIC) enhances efficiency by providing additional sub-cooling. This allows the expansion device to effectively control the refrigerant distribution. This increases the operating efficiency and reduces the volume of refrigerant in each system.
Governments in many countries are enforcing a ban of HCFC-based refrigerants for new installations. The most popular choice for chillers, R22, an HCFC-based refrigerant, has been targeted by the Montreal Protocol to be phased out in new equipment. Because of these restrictions, R410A (a blend of HFCs, which do not deplete the ozone) refrigerants are desirable.
R410A is a more efficient refrigerant as it has a higher specific heat capacity when compared to R407C or R22. This higher energy carrying capacity allows for smaller pipe sizes, longer pipe runs and reduces the volume of refrigerant within a system. This is a major factor for safety and environmental requirements in the design, manufacture, installation, operation, maintenance and disposal of refrigerating systems.
Combining the features of VRF and a water circuit using CITY MULTI WR2/WY, heat is rejected to a water source rather than to the outside air. The advantage of water cooled systems is that the water can be delivered at optimised temperatures and volumes, which allows even greater flexibility and increased COP.
Mitsubishi Electric now offers double heat recovery operation. The first heat recovery is within the refrigerant system, where simultaneous cooling and heating operation is available with heat recovery performed between indoor units.
The second is within the water loop, where heat recovery is performed between the PQRY units. This double heat recovery operation substantially improves energy efficiency and makes the system the ideal solution for modern office buildings, where areas require cooling even in winter.