Page 31 - Climate Control News November 2018
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The VRV H and R Series are available in capacities from 16kW up to 168kw.
“Every building constructed to Australia’s ex- isting codes locks us in to energy demand and high emissions, and locks out a lot of opportuni- ties for integrating renewables. It’s a race against time,” Professor Graham said.
“Old buildings need to be retrofitted so they're at least four times more energy efficient than they currently are, and all new buildings need to be near or net zero energy – that is either super low energy consuming buildings and/or buildings that have integrated renewable energy supply.”
Graham said its time to decarbonise the building sector. This means making buildings net producers of renewable energy rather than net consumers.
He said Australia's building industry is practi- cal, and if standards change it will retool to meet those standards. “Policy that resets the baseline to ambitious energy and sustainability perfor- mance would have a powerful effect on emission reduction,” he said. Another draft code that is
open for comment until November 22, 2018 is draft standard AS 5389 Space heating and cooling and ventilation systems – Calculation of energy and comfort performance.
According to Standards Australia, the new code is a method for calculating energy consump- tion and determining the comfort performance of space heating and cooling systems as well as ven- tilator systems. The draft standard uses a combi- nation of test results for component performance, mathematical models of representative buildings, and parameters for comfort conditions.
The draft of AS 5389 includes methodologies for calculating annual purchased energy use, calcu- lating displaced purchased energy relative to ref- erence heating and cooling devices, and method- ologies for determining comfort performance.
The method is applicable to products capable of space heating, cooling, or both; with or with- out sanitary water heating; and products capa- ble of temperature and/or humidity controlled ventilation or heat exchange between zones of the building.
To comply with stricter standards, building owners and managers will be seeking out HVAC systems that don't just guarantee compliance but features smart technology that is easy to in- stall and manage.
Its this capability that has set the biggest play- ers apart from the rest of the market.
A good example is the release of Daikin's new VRV H (Heat Pump) and R (Heat Recovery) range which is equipped with new VRT Smart technology.
It's a significant step up from its predecessor with Daikin delivering more features coupled with greater simplicity.
Daikin's Variable Refrigerant Temperature technology was well received by customers but to take advantage of this feature it had to be set up during commissioning.
“Now it operates as standard,” according to Daikin's national commercial manager, Si- mon Langstaff.
“VRT Smart delivers improved part-load opera- tions and better comfort for occupants; custom- ers are getting much more control and comfort.”
Langstaff said this Series makes smaller adjust- ments, more regularly updating the evaporator temperature and fan speed every three minutes.
“The previous unit only adjusted one degree, every five minutes,” he said.
“It also takes into account the indoor tempera- ture before making an adjustment and has a five speed indoor fan whereas the previous unit had a three speed fan.
“It incorporates variable air volume control of the indoor fan coil integrated with refrigerant temperature control from the condenser to de- liver a system which responds rapidly to indoor load changes.”
Daikin's national product manager, Raj Sin- gh, said another key feature is the new “K” type compressor which is available on selected VRV H models.
“It features a state-of-the-art back pressure con- trol mechanism that improves low load operation by up to 24% when compared to VRV IV,” he said.
“This isn't just a few minor improvements this is a real upgrade that represents a new age of comfort and control.”
The VRV H and R Series are available in capac- ities from 16kW up to 168kw. ✺
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