Retrofit : Volume 3 Issue 1 2014
RETROFIT AUSTRALIA • VOLUME 3 NUMBER 1 2014 • 49 Case Study | Performance criteria 1.25 million kilowatt hours reduction in energy use Overall/relative performance and/ or savings: Annual savings $170,000 Return on investment: 4.5 years 22 per cent return on investment Energy efficiency opportunities implemented by SA Pathology Heating, ventilation and air conditioning (HVAC) Sustainable Focus undertook a detailed review of the plant and building management system (BMS) and established that a BMS upgrade would enable application of sophisticated control strategies and save considerable energy. The existing plant and control system had limited control functionality, resulting in equipment operating at unnecessary times and capacities. Lighting The most cost-effective solution was a combination of new and retrofit luminaires, including energy-efficient control gear, and also energy-efficient light reflectors. New energy-efficient luminaires were used at those locations where the existing lighting fittings were deemed too old, or of non-standard design, and retrofit kits were used to upgrade the recessed troffers identified earlier. Monitoring A monitoring and reporting system that uses data from the BMS to improve management was developed to provide information on mechanical ventilation, heating, cooling and water use. Solar power Previously, the temperature of the glass in summer would reach 60 degrees Celsius, which made work conditions very unpleasant. Instead of the traditional approach of increasing air conditioning capacity, Sustainable Focus found a solution that would improve the energy efficiency of the building at the same time as generating power from the sun: a shade and solar energy installation. It is believed that this will be one of the largest examples of this type of shading project in South Australia, and quite possibly in Australia. Some of the benefits of this approach included: • solar gain reduction -- reduced cooling demand and associated energy consumption of chillers • solar generation -- integration of renewable embedded generation • increased occupant comfort levels • reduced carbon footprint • contribution towards Adelaide's 'Solar City' main objectives, in particular the testing of new technologies and approaches that can be replicated on a national scale. Water There have been various projects to reduce water consumption for SA Pathology. Solutions have included: • improving the efficiency and reducing the running time of the chiller • installing a holding tank, and plumbing it into the toilet block to fill toilet cisterns. The current reading of the sub-meter shows Director Rob Smith assessing the heaving ventilation and air conditioning at SA Pathology. Improving Energy Efficiency: Proposed Shade and solar energy installation. Hanson Institute building, IMVS pathology, Frome Road, Adelaide SA 5000.
Volume 3 Issue 2 2014
Volume 2 Issue 3 2013-2014