The Fremantle Aquatic Centre CHP and Geothermal Heating Project is a unique project that combines a Cogeneration unit with a Ground Source Heat Pump utilising a Shallow Aquifer Geothermal Bore System. This is the first project of its kind in Australia that combines these two technologies.
Engineering firm EMC designed the combination system to replace the existing gas boiler system providing heat to 1 @ 50m and 1 @ 25m outdoor swimming pools.
As part of a multi-million dollar renovation, a purpose-built plant room was constructed at the southern end of the property to house the CHP, heat pump, all associated pumps and the plate heat exchangers.
The Cogeneration plant provides electrical output in conjunction with a 30kW PV array. This is used to offset the facility’s electrical consumption and thermal energy to the centre’s two pools. The CHP system is currently scheduled to operate during peak periods, 5 days per week.
The MiracleGen CHP system is a fully integrated unit composed of a gasified Cummins engine, Leroy Somer alternator, ComAp controller and all required pumps and heat exchangers.
The Ground Source Heat Pump utilises warm water (approx. 26°C), from the Leederville Aquifer, Fremantle to heat both of the pools. The total efficiency of the heat pump during operation is over 600%. The production bore is located approx 30m away from the plant room and the injection bore is located approx 350m to the west of the production bore. Significant monitoring and warning systems are installed as part of the project’s groundwater license. These controls are fully integrated into the ComAp BMS system.
The MiracleGen CHP unit is supplied with a ComAp Intelligen NT controller. This controller system was expanded to provide a full BMS system that operates the entire pool plant room including all of the heating and pumping equipment. The ComAp Intelligen NT controller has full control, monitoring and reporting capabilities system-wide. It’s also able to calculate GHG and cost savings via integrated gas and water flow meters
As part of the upgrade, the existing Submain and MSSB were removed and replaced with new purpose-built components.
At the time of writing, pre-commissioning checks on the system were recently completed.