THE GEOTHERMAL ADVANTAGE

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1 THE GEOTHERMAL ADVANTAGE reduce your heating and cooling bills by up to 70% for the next 50 years.

2 the benefits of a ground source heat pump Geothermal systems provide heating and cooling from stored solar energy within the ground or water source. Utilising pipes buried in the ground as a collector, a geothermal Ground Source Heat Pump transfers energy to be used in various applications such as heating or cooling your building. One of the most important characteristics of a heat pump is the efficiency of the unit. Because Ground Source Heat Pumps extract heat from relatively warm soil (or groundwater) in the winter and deliver heat to the same relatively cool soil (or groundwater) in the summer, this leads to a very high efficiency and lower energy use. Typically Ground Source Heat Pumps use only a small amount of electricity and return up to five times more energy than they consume. Geothermal heat pumps can be used for any application which requires heating or cooling: + Home heating/cooling + Swimming pools + Commercial heating/cooling + Spas + Hot water + Agricultural + Commercial applications Advantages + Can be set up for extremely efficient operation + Can be used to heat and cool + Geothermal uses renewable energy + Clean operation. No combustion on site + Long Life (50+ years for a closed loop ground loop) + Low maintenance + No noisy outdoor units How does it work There are three main elements to a Ground Source Heat Pump system: 1. The ground loop 2. A heat pump 3. Heating and Cooling distribution system

3 clean efficient renewable energy The Ground Loop Despite the variation in temperature experienced throughout the year, the temperature below ground stays fairly consistent all year, regardless of climate or season. Geothermal systems use earth loops to extract heat from the ground. This is comprised of lengths of HDPE pipe buried in the ground, or a body of water. The pipe is usually a closed circuit and is filled with a mixture of water. In winter, the water is pumped around the pipe absorbing the energy from the surrounding earth and carrying it into the building. In the building, the heat pump extracts this heat from the water solution and transfers it into the building. In summer, the process is reversed and the water solution carries the heat from the building via the heat pump and rejects the heat energy back into the earth. There are a number of options for the ground loop: Horizontal Loop If adequate land area is available, a horizontal closed loop is composed of pipes run in trenches in the ground, pipes are placed in trenches up to 150m long and averaging 1.5m deep. The length and the width of the trenches is dependent on the size of area requiring heating or cooling. Pond Loop A pond, dam or body of water can be used as a collector by installing coils of pipe into the water. The coils of pipe are attached to a frame and sunk to the bottom of the pond. The amount of pipe is dependent on the size of area requiring heating or cooling. The pond loop is probably the most economical way of installing a loop as generally no excavation is required. Vertical Loop A drilling rig is used to bore a number of holes of metres deep. The number of holes drilled is dependent on the size of area requiring heating or cooling. Pipe pairs in the hole are joined on the bottom with a u-bend. The borehole is backfilled with a grout to give good thermal connection to the surrounding rock or soil. For very small sites this may be the only feasible option. Vertical loops are perfect for properties on small parcels of land or locations with shallow rock where trenching is not possible.

4 B Rush Ski Club Ski Lodge heating Ski Lodge heating 6 years 42 kw of Geothermal Heat Pumps with 16 x 30m vertical bores Direct Energy s technology has cut our energy consumption by 75 % and our fossil fuel usage by more than 80%. The payback period of 6 years is considered by the club to be completely acceptable given the expected 30 to 50 year life of our building. Since commissioning, forecasted savings have been exceeded with several spin-off benefits. Murray Neilson, B Rush Ski Club, VIictoria, Australia Over the past five years the system continues to deliver exceptional performance, reducing the ski club s LPG consumption by 98.4%. CSIRO Australian Square Kilometer Array Pathfinder Cooling electronics in pedestal of radio telescope 4-5 years 14 kw Geothermal Heat Pump with 6 x 30m vertical ground loops CSIRO is currently building one of the most powerful radio telescope arrays in the world in a remote, radio quiet area of Western Australia. An enormous amount of information is collected which requires very powerful and reliable processing electronics and computer systems that need constant cooling. In the remote desert location the only power source is diesel generation and this drives a need for very low power consumption and direct geothermal system ground coupled heat pumps are an excellent solution. A system is installed in an experimental cooling arrangement at ATNF s headquarters at Marsfield for evaluation. Direct Energy supplied equipment and arranged all associated installation work. Complex and thorough testing has proved that the geothermal system is a compelling solution for providing continuous, reliable, maintenance free and cheap cooling of sensitive scientific equipment in a remote desert environment.

5 City of Kalgoorlie-Boulder Goldfields Oasis Leisure Centre Olympic Swimming Pool & associated leisure pools 4-5 years ~ 300 kw of Geothermal Heat Pumps with combined vertical & horizontal loop system. 44 x 96m bores + horizontal slinky system Direct Energy designed and installed the Geothermal Heat Pump system for the CKB Leisure Centre. Led by Ed Lohrenz, who has prior aquatic centre experience on the Pan Am Aquatic Centre Toronto, this retro-fit project is world first and was installed over approximately 3000 sqm of land. The hybrid geothermal system is designed to provide 100kW of HVAC for gym, offices and fitness centre combined with pool water heating for an Olympic pool and large leisure pool facility. IKEA Integrated Energy System IKEA Shopping Centre < 4 years Vertical Ground Heat Exchanger under two levels of parking and retail space Direct Energy s senior design engineer Ed Lohrenz was engaged as the lead designer for the fully integrated geothermal system in a new 400,000 square foot IKEA retail store. A vertical GHX was constructed under the two levels of parking and retail space. Ed developed a detailed hourly energy model of the facility that became an integral part of the design process during the early phases of the architectural, mechanical and electrical systems design development, and was key to reducing the building cooling loads and electrical demand.

6 For further information contact: T: E: info@directenergy.com.au A: Melbourne Office PO Box Bourke St Melbourne, VIC 3001 Western Australia Office Suite Railway Parade Shenton Park, WA

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