Retrofit : Volume 2 Issue 3 2013-2014
42 • RETROFIT AUSTRALIA • VOLUME 2 NUMBER 3 2013--2014 | Energy Control 'The program will result in a reduction of 1.46 million kilowatt hours each year, 1587 tonnes of carbon dioxide, and will also reduce the amount of energy the electricity grid needs to supply the shopping centre by 457 kilowatts. 'Mt Ommaney has approximately 2,500 residents and 800 houses, [and] with our energy-saving initiative we are playing our role in helping to reduce peak demand within our community -- something we are very proud of.' The program revolves around five key tactics capable of delivering energy savings -- window film, UVC coil optimisation, mechanical plant upgrade, lighting retrofit and building management system (BMS) reprogramming. Project creator Zac Gilder says these steps are logical and fundamental to assist in the efficient reduction of energy usage at Mt Ommaney Centre. 'A cooler building and efficient plant are two of the keys to cutting energy usage,' says Mr Gilder. 'A car without window tinting takes more energy and more time to take the heat out -- it's the same for a commercial building. In simple terms, it means the air conditioning system is working overtime to make the space cool. 'Applying window film to all external windows in the centre reduces the sun's heat, glare and UV, which ultimately takes pressure off the air conditioning system as the space cools significantly faster -- faster cooling equals less energy used. 'As a simple illustration, a car's radiator won't operate efficiently if it is blocked. This is just like a commercial air conditioning system. The project used very high-quality UVC emitters to help the coils operate efficiently. This reduces energy consumption and dramatically improves the quality of the air supplied. 'That, in conjunction with BMS -- a computer system that automatically shuts down air conditioning and lighting according to demand usage -- will result in significant reductions.' The project has also implemented a plant upgrade that retail giants Woolworths and Big W have also previously adopted. 'The plant upgrade works around the principle of coefficient of performance (COP), where less energy goes in but the same or better performance goes out. Upgrading the condensers, which are part of the cooling plant, means less energy is used,' says Mr Gilder. Apart from the cooling systems, upgraded lighting involved the retrofit of lighting predominantly in the hallways and corridors, centre management and toilet facilities, for increased efficiency. In addition to environmental benefits, the project will deliver a cleaner environment for shoppers and workers with the UVC coil cleaning system, which was originally created for hospitals. 'Air quality improvements in a shopping centre are an obvious additional win, because of the closed space with large crowds of people,' says Mr Gilder. 'The new system will remove up to 99 per cent of the airborne viruses, mould mycotoxins/spores, and bacteria, so even if there was a pandemic outbreak, the air in the centre would be substantially safer. 'With UVC, the coils are automatically cleaned. It has been proven that the coils are where most of the bacteria and mould grow and spread.' In partnership with Energywize and Energex, Mt Ommaney Centre has taken several steps to reduce its impact on the local electricity grid, making it a win-win situation for the local community, the electricity network and the shopping centre.
Retrofit Volume 2 Issue 2 2013
Volume 3 Issue 1 2014