ENERGY SAVING EQUIPMENT Gree G
ree UK off ers a range of air conditioning equipment which goes beyond merely being energy effi cient.
The range is led by the world’s fi rst direct- drive photovoltaic (PV) powered VRF system, which can save end users up to 30% of energy costs. The units can be used to cool, heat or produce hot water.
Conventional PV powered VRF systems collect solar energy and produce electrical power, feeding it to a DC-AC converter for use by the unit. Gree’s system uses an advanced power management system which eliminates the need for the converter, feeding electricity from the PV array directly to the VRF. This removes the effi ciency losses associated with power conversion, boosting the system’s effi ciency and cost-eff ectiveness. When conditions allow, surplus electricity can be fed back into the grid, giving end users an income
to the location of the remote, using the built-in temperature sensor.
Gree UK managing director, Roberto Mallozzi said: “This is probably my favourite Gree air conditioning feature. When I go into my offi ce in the morning, I take the remote controller from its pouch on the wall, set it to my preferred temperature and just put it down on the desk next to me. It makes the whole thing so much simpler.”
In the New Year, Gree will be further enhancing its portfolio with the launch of a new range of even more energy effi cient R32 equipment.
from feed-in tariff , further tilting the economics in favour of PV-powered VRF.
On the controls side, Gree’s ‘I Feel’ button makes the room’s occupant the air conditioning system’s priority, not the part of the room around the wall thermostat.
When the occupant presses the ‘I Feel’ button on the remote control, which works with any Gree system, the air conditioning system ensures that it adjusts its target temperature according
Trox
Humidity Solutions
H
umidity Solutions has introduced the energy-effi cient Airtec Hydrosens in-duct high pressure adiabatic humidifi cation system, capable of modulating water fl ow in seven diff erent combinations to deliver precise control in each space.
Exclusive to the Hydrosens system is the ability to control up to three separate humidifi er systems, in three diff erent AHUs – each with diff erent set-points – from a single pump. The system can be adapted to any size of AHU or duct, making it both versatile and cost-eff ective.
Onboard Hydrosens software modulates
water fl ow in seven stages, each representing 14% capacity, used with three operational valves representing 14%, 28% and 56% capacity to achieve adapted water fl ow in seven combinations.
A frequency inverter pump operating at 50 bar provides fi nely atomised water mist through patented nozzles to achieve desired conditions with minimum use of water and power. The system’s use of adiabatic humidifi cation enables low energy cooling, requiring only 6W of electrical energy to generate 629W of cooling during the summer.
Hygiene conditions are maintained by the Hydrosens hygienic rinse system, which can be used in conjunction with a reverse osmosis system or ultra-violet steriliser.
T
rox has launched a major new fancoil range – the TROX PWX Series – which brings to the market a 25% to 35% energy efficiency improvement over alternative models, with outstanding acoustic performance, and BACnet-enabled integrated controls packages as standard.
The new fancoils have undergone thorough in-house testing, using TROX’s test chamber (constructed to comply with ASHRAE 79, BS1397 and Eurovent 6/3), in addition to extensive corroboration of results at an independent test facility.
Specifiers can input exact performance criteria for an extremely wide range of thermal and acoustic scenarios, instead of using less reliable ‘anticipated’ or ‘expected’ data. The Trox PWX range is therefore able to speed up the specification of projects significantly, reduce levels of risk, streamline installation and commissioning, and provide valuable environmental and cost benefits. While the physical dimensions of the TROX PWX units remain the same (270mm deep) to meet market requirements, the units feature new inlet attenuators, inlet plenums and discharge attenuators capable of achieving outstanding performance across a wide range of applications. SFPs across the range comply with and exceed Part L requirements, with typical values between 0.15 to 0.25 W/(l/s) at 30 Pa ESP, with a Guide NR of 35.
www.acr-news.com January 2018 57
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