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Products in Action
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College enjoys savings thanks to VSDs Danfoss Drives together with its HVAC partner Digicon, is helping New College Durham, a higher education and sixth form college in County Durham, to enjoy impressive energy savings. Following discussions with Danfoss business partner, Digicon Solutions, the college decided to install Danfoss VLT FC102 HVAC Drives in 30 air handling unit fan (AHU) applications. The drives were integrated into the existing Cylon BMS with kWh consumption data being analysed over the entire site. Prior to installation of the drives, all the AHU fans on the college’s sites operated at full speed all the time, wasting a lot of energy. To remedy this, carbon dioxide sensors were installed in the AHU return air ducts and connected through the BMS, which enabled the actual occupation level of each individual area being served to be measured and controlled. The speed of the fans was then automatically reduced or increased by the drives to provide the exact rate of air exchange needed to maintain a healthy and comfortable environment. In the 12 months since the project was implemented, the energy savings produced by the drives have been reflected in the improvement in the College’s already outstanding Energy Performance Operational Ratings, which are included in the building’s DEC (Display Energy Certificate). The rating for the main building has improved from 60 to 55, while the sports and music building has improved from a ONLINE ENQUIRY 102 rating of 57 to 54.
Innovative A/C for top London hotel An innovative, efficient air conditioning system has been chosen to provide cooling and comfort to guests at the Strand Palace Hotel in London. The hotel, which is walking distance from some of London’s most famous theatres and has been welcoming guests since 1909, needed to modernise its heating and cooling systems to ensure a quality experience for guests. High levels of energy efficiency and minimal disruption to the hotel’s operation during installation were also key considerations. The solution came in the form of the unique Hybrid VRF (Variable Refrigerant Flow) system from Mitsubishi Electric, which offers simultaneous heating and cooling with full heat recovery. The combination of refrigerant and water used in Hybrid VRF also delivers a much lower global warming potential (GWP) than traditional VRF systems and saves around 30-40 per cent in refrigerant use in comparison. The fit-out was designed by Elementa Consulting and installed by Working Environments and has seen units fitted across the hotel’s 790 rooms. The project started in September 2018 and is due for completion in April 2020, making the project the biggest of ONLINE ENQUIRY 101 its kind in Europe.
Glazing systems cut energy costs at Passivhaus leisure centre Work is expected to start shortly on the installation on the world’s first Passivhaus leisure centre of architectural glazing systems by UK manufacturer Kawneer. The systems – two types of curtain walling, three types of doors, windows and brise soleil – will be installed by Kawneer-approved specialist sub-contractor AB Glass for main contractor Kier at St Sidwell’s Point in Exeter. The 4,850m2 project will replace an ageing swimming pool with an eight-lane national/ county-standard pool and four-lane learner pool, both with movable floors, together with dry sports facilities including gym, café and
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crèche, and health and spa amenities. Benefits of the Passivhaus design include a 70 per cent saving on energy costs when compared to a current good practice pool, a 50 per cent reduction in water use, outstanding internal water and air quality, excellent daylight levels and lower maintenance costs due to a high-quality building fabric. The flagship in Exeter City Council’s £330m regenerating city centre masterplan, which also includes housing, offices, restaurants and retail, is expected to open to the public, alongside a new bus station, in the spring of 2021, and attract more than 500,000 visits a year.
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