Energy Efficient t Air Conditioning 23
created when different metals are in contact, which is a scenario that can occur over time in conventional coils. In fact, Sapa undertook comparative tests and found that the all-aluminium design resulted in increased corrosion resistance
to that possessed by traditional copper/ aluminium coils.
The all-aluminium design also enables easier and more efficient recycling than with mixed material systems, as there is no need to separate the different materials at the end of their life.
The figures on performance, weight and refrigerant volume are strong arguments for aluminium to become the material of
choice in heat exchangers of the future and the more informed end-users will begin to demand it.
Ultimately, the numbers will speak for themselves and as Sapa’s report concluded: “The future will belong to aluminium micro-channel heat exchangers, facilitating the design of smarter energy saving solutions for HVAC.”
Aluminium in air conditioning
THE NEW CITY Multi YLM VRF (Variable Refrigerant Flow) range of air conditioners from Mitsubishi Electric features a world-first flat tube aluminium micro-channel heat exchanger, protected with a special zinc coating. The new range offers up to 27% annual energy saving compared to the previous equivalent City Multi systems.
The YLM includes selectable increased and automated evaporating temperature control, optimised design of refrigerant circuit and components, and the ability to provide heat during defrost.
Units are available to deliver from 22kW - 101kW capacity to a building in both heat pump and heat recovery variants, with up to 50 indoor units connectable to the largest model. The smallest unit in the range, the PUHY-EP200YLM-A model is just 740 x 920 x 1710mm in size, making it transportable in a standard building lift. The flat tube aluminium micro-channel heat exchanger in the VRF system also delivers 26% more contact with the refrigerant and 30% more piping per area. It reduces both weight and footprint and offers a reduction in system refrigerant volume of 10% over previous models.
Hawco
Visit ACR News online at
www.acr-news.com
ACR News February 2015
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40