Page 36 - Climate Control News December 2018

Data Centre Feature
DANFOSS HAS ADDED new 8.5 TR and 11 TR (*) variable speed compressors with IDV(**) to its popular VZH range, giving commercial cool- ing manufacturers the market’s most complete choice of variable speed scrolls with qualified drives for HVAC systems.
In particular, the new inverter scrolls are ideal for data centre close control and rooftop units, where they will enable precise and efficient cooling.
They’re also an excellent fit for rooftop units, helping manufacturers to meet challenging new seasonal and part-load efficiency standards (IEER), like the US Department of Energy’s energy conservation regulations coming into force in 2023. Likewise, for chillers, the Danfoss VZH range will enable OEMs to develop a competitive range of systems capable to exceed the demanding Ecode- sign Lot 21 targets coming into force by 2021.
Luigi Zamana, senior marketing director for Danfoss Commercial Compressors, said the ex- tended VZH range also gives OEMs the opportu- nity to work with a single, proven supplier of pre- qualified variable speed compressor and drive packages, from 4 TR up to 26 TR, with scroll technology and from 60 TR to 400 TR with oil- free Turbocor technology.
Worldwide, energy efficiency standards are increasingly based upon seasonal efficiency measures like the Seasonal Energy Efficiency Ratio (SEER), Integrated Energy Efficiency Ratio (IEER), and Integrated Part Load Value (IPLV). These standards are designed to better reflect the actual average and yearly load profile.
Cooling manufacturers are therefore under pressure to improve part-load efficiency.
With their ability to continuously modulate capacity, variable speed compressors are ac- knowledged as a key part of meeting this chal- lenge. However, Danfoss VZH scrolls go fur- ther. They feature Intermediate Discharge Valves (IDVs), which prevent the over-com- pression losses that compromise efficiency in standard scroll technology under part-load conditions. The result is significant improve- ment in integrated efficiency scores. Efficiency is further improved by the VZH range with the use of the latest permanent magnet motor technology that helps reduce power consump- tion at all operating conditions.
Energy efficiency is particularly important in data centre cooling applications. With round- the-clock cooling demand, throughout the year,
each incremental reduction in power consump- tion has a disproportionately large impact on en- ergy bills – giving IDVs a clear role to play in making data centres more sustainable.
IDVs will indeed deliver much higher system efficiency for the same cooling capacity espe- cially at very high evaporating temperatures (low pressure ratios), that are typical of the data centre functioning. But servers also need precise conditions to function reliably, and the variable speed technology gives an unparal- leled ability to achieve a narrow, 0.3 °C temper- ature window, without sacrificing Power Us- age Effectiveness (PUE).
This, and the VZH extended operating map and compressors’ ability to work in a wide range of conditions, makes them an obvious choice for IT close control systems – as well as rooftop units in markets where seasonal efficiency is a priority.
Importantly, Danfoss is able to supply right- sized compressors and drives as a matched, pre- qualified and certified package. ✺
(*) @ ARI conditions, full speed (110 RPS) (**): Intermediate Discharge Valve for improved part-load efficiency
BELOW: Danfoss VZH range is designed for the data centre and rooftop units.
Precision and efficiency without impacting PUE
CLIMATECONTROLNEWS.COM.AU
Vertiv appointments
“The need for data centres to run uninterrupted, and to optimal ener- gy efficiency levels, is greater than ever in the IoT and smart cities era,” according to Robert Linsdell, man- aging director A/NZ, Vertiv. “We need a strong services team to effec- tively manage that expectation and help enterprises and government or- ganisations realise their smart city ambitions.” ✺
Vertiv solutions architect, Matt Lawler, will be based in Canberra.
CRITICAL TECHNOLOGY INFRA- STRUCTURE specialist Vertiv has created three strategic roles to meet the demand for its cloud and smart cities services.
Glen Trestrail will take on responsi- bility for service and project manage- ment as the new senior director of that
business in Australia and New Zealand, while Jonathan Buchanan will lead the cloud, co-location and BFSI team and Matt Lawler joins in the role of solu- tions architect in Canberra.
Lawler will work closely with Vertiv’s partners in Canberra to increase the company’s local presence.
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