Business Energy Efficiency (Common Measures) Presented by Anoop - PDF document

20/08/2013 3E Energy Efficiency Forum Business Energy Efficiency (Common Measures) Presented by Anoop Gupta www.steplight.com.au Equipment types covered today HVAC Refrigeration Hot Water Systems Air Compressors Office Equipment www.steplight.com.au 1

20/08/2013 Heating, ventilation & air conditioning (HVAC) Keep HVAC systems regularly maintained Keep fans, filters and coils clean, change worn belts & fans, repair refrigerant insulation and pipe leakages. Poorly maintained equipment can double energy costs in HVAC. www.steplight.com.au HVAC Minimise heat-producing equipment All electrical equipment generates heat, which works against air-conditioners in summer. Relocate office equipment, refrigerators, vending machines, water coolers etc to naturally-cooled rooms to save on cooling costs. www.steplight.com.au 2

20/08/2013 HVAC Ensure thermostat temperatures are set correctly Summer settings should be around 24°C and winter settings around 20°C. Every degree cooler in summer and warmer in winter will increase energy consumption by 10%. www.steplight.com.au HVAC Use ceiling or floor fans when A/C units are on. Will enable you to raise the thermostat setting a degree or two compared to your normal setting. Fans will also help to better circulate the cooled air. www.steplight.com.au 3

20/08/2013 HVAC Install window tinting or external shading to block out direct sunlight. Direct sunlight can cause rooms to overheat and air-conditioning systems to over-cycle. Solar tinting film and shading can reduce heat gain through windows by up to 80%, which will reduce the need for air-conditioning. www.steplight.com.au Refrigeration Keep refrigerator doors closed. Cooled air is quickly lost when refrigerator doors are open. Install plastic strip curtains if doors need to stay open for extended periods. www.steplight.com.au 4

20/08/2013 Refrigeration Check door seals regularly. Poor door seals can go unnoticed for long periods of time if the door is not checked regularly. Replace worn or damaged seals as soon as possible. www.steplight.com.au Refrigeration Switch off drinks fridges at night. (non-perishables only) Non-perishable drinks need not be kept chilled overnight. A simple timer switch can be used to power fridges off outside trading hours. www.steplight.com.au 5

20/08/2013 Refrigeration Ensure display fridges and under-bar fridges have self-closing doors. Energy is wasted when display fridge doors are left open. Self-closing hinges can be retrofitted. Choose models that have this feature when buying new appliances. Refrigeration Install insulated covers on refrigerators, cool rooms and freezers. Insulated covers provide an extra layer of insulation that can be tailor made to fit existing cool rooms and displays. www.steplight.com.au 6

20/08/2013 Hot Water Systems Switch off hot water systems when not in use. Use a timer switch to turn off electric Peak tariff storage systems after hours. Off-peak tariff Switch to off-peak hot water for larger storage systems when usage is over 160L per day. Hot Water Systems Reduce hot water usage. Install low-flow showerheads on showers and flow regulators on taps and dishwashing attachments. If hot water is used for cleaning, fill buckets instead of using hoses. www.steplight.com.au 7

20/08/2013 Hot Water Systems Reduce hot water temperature. Many hot water systems are set at too high a temperature. Water temperature can be reduced to 60-65°C using a thermostat. Any lower than this can pose a health risk. www.steplight.com.au Hot Water Systems Switch electric systems to gas, instant gas or gas-boosted solar systems. If gas is available, upgrade to a gas or gas- boosted solar hot water system. If gas is not available, install an electric-boosted solar system. Instant water heaters eliminate the need to keep reheating stored water. www.steplight.com.au 8

20/08/2013 Air Compressors Regularly check for leaks in the system. Check for leaks in pipes, connectors and joints using a leak detector. A simpler leak detection method is to apply soapy water to suspected areas and watch for bubbles. System leaks can easily add up to 30% more energy cost. www.steplight.com.au Air Compressors Keep intake air temperature cool. Operating a compressor in hot areas increases energy consumption. Move the compressor outside, or duct the outside air directly into the compressor intake. A 10°C drop in intake air temperature will reduce energy consumption by 5%. 9

20/08/2013 Air Compressors When replacing compressors, choose the right type for the job. • Screw compressor - constant loads • Reciprocating (piston) compressor - small, intermittent loads. • Centrifugal compressor - larger applications. www.steplight.com.au Air Compressors Install variable speed drives. VSD’s can be used to good effect in air compressors where running hours are long with a high proportion of usage in the mid to low-capacity range. Up to 50% energy savings are possible. www.steplight.com.au 10

20/08/2013 Office Equipment Switch equipment off at the power point. Many appliances use standby power even when they are not being used for their primary purpose. Switching off equipment at the power point overnight and on weekends Remote-control switch can save up to 20% of total energy use. www.steplight.com.au Office Equipment Use energy saving settings on computers. Monitors and hard disks can be automatically switched to low power modes after periods of inactivity. Most monitors use 10% power in standby or sleep mode, while most hard disks use only 5%. www.steplight.com.au 11

20/08/2013 Office Equipment Switch to low resolution print settings. Printing at 300dpi instead of 600dpi saves toner and environmental waste. www.steplight.com.au Office Equipment Build an energy efficient culture Set good energy efficiency policy then train staff, evaluate performance and reward good behaviour. www.steplight.com.au 12

20/08/2013 Next steps… Measure and monitor energy use. Great low-cost way to find out where energy is being used in your business. Learning how to do this will help Order these and other you remain energy efficient for the products at rest of your life. www.steplight.com.au Next steps… Register for a free workshop & a free energy audit 3eproject.org.au 13