Fremantle Aquatic Centre

Client: Fremantle Aquatic & Leisure Centre
Location: Fremantle, Perth WA
Head Contractor: Evo Energy & Evo Industries Australia Pty Ltd
Application: Cogeneration and Geothermal Heating

The City of Fremantle needed a low-carbon option when upgrading their pool heating system at the Fremantle Leisure Centre.

Evo Energy presented a cogeneration and geothermal heating solution that was a first of its kind in Australia and won the tender to supply and install both the water-water heat pump for the geothermal heating system and the cogeneration system.

The Fremantle Aquatic Centre CHP and Geothermal heating project was a unique project that combines a Cogeneration unit with a ground source heat pump utilizing 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 the  50m and 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 cogeneration plant, geothermal heating & all associated pumps and the plate heat exchangers.

Project Overview
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 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.

Project Specifications

  • 1 @ MiracleGen MC131N-SC CHP Unit 75kW electrical and 120kW thermal
  • 1 @ heat rejection radiator to provide 100% of CHP’s load
  • 1 @ SGHP300MHT water-to-water heat pump 330kW output at design conditions
  • 4 @ Davey Isospec pool pumps
  • 4 @ Sondex PHE’s•
  • 1 @ Wilo submersible bore pump
  • 1 @ Forster self-cleaning bore filter
  • 2 @ Wilo hot loop circulation pumps
  • 1 @ MSSB
  • 6 @ Endress & Hauser promag flow meters
  • @ Itron natural gas quantanometer
  • 24 @ Siemens temperature sensors
  • Associated plumbing, electrical and mechanical components
  • Full Borefield monitoring and controls

2015 Splash Environmental Award

Outstanding Results

The heating system has reduced Fremantle Leisure Centre carbon dioxide emissions by 250 tonnes each year which is a reduction of around 25% of their annual emissions. While the Fremantle Leisure Centre will still require the same amount of energy to heat the centre’s pools, it now comes from a cheaper source, significantly reducing their annual running costs.

In 2014, Evo Energy were awarded the Splash! Environmental Award for their ground-breaking Fremantle Aquatic Centre heating project. This project of combined heat pump and cogeneration system was the first of its kind in Australia and was recognised for its enormous savings and environmental benefits.

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