Cogeneration
ISIS Sugar Mill
Location: Childers, QLD
Capacity: 25MW
Commissioned: June 2006
Environmental Benefits: Saves more than 97,700 tonnes of CO2 per annum
The ISIS Central Sugar Mill facility is SEI’s first renewable cogeneration project that produces energy from sugar cane by-product (bagasse).
Operation
Steam from combusted bagasse is used to drive a turbine to produce clean, renewable electricity, used either in the sugar mill or exported to the grid. Being a seasonal resource, the ISIS sugar mill’s 25MW cogeneration facility operates around the clock for approximately six months of the year.
Energy
The plant produces approximately 98,500MWh of electricity per annum, which is expected to provide the annual electricity requirements of around 13,900 average households.
Environmental Benefits
Bagasse displaces electricity normally sourced from fossil fuels. This project saves more than 97,700 tonnes of CO2 per annum. This is equivalent to removing more than 12,000 cars from the road per year, or planting around 364,552 trees.
Through innovation and advanced technology, SEI is committed to significantly contributing to the reduction of Australia’s greenhouse gas emissions.
Qenos
Location: Altona, Vic
Capacity: 21 MW & 88 tonnes of steam/hour.
Commissioned: March 2013
Environmental Benefits: Greenhouse gas emissions reduced by approximately 100,000 tonnes per annum
The facility, operated and maintained by SEI, included a Solar Turbine Titan 250 gas turbine package with the latest SoLoNOx combustion technology and Rentech Heat Recovery Steam Generator (HRSG).
Background
At the time, Qenos was Australia's sole manufacturer and leading supplier of world class polyethylene and polymers. In tandem with its multi-million-dollar expansion project, Qenos established a state of the art cogeneration facility at its Altona, Victoria site to provide energy-efficient surety of supply through on-site creation of electricity and steam.
At the time of construction the facility was the largest industrial cogeneration plant to be built in Australia in over a decade.
Project Scope
The facility, operated and maintained by SEI, includes a Solar Turbine Titan 250 gas turbine package with the latest SoLoNOx combustion technology and Rentech Heat Recovery Steam Generator (HRSG). The generator produces steam by recovering the exhaust heat emitted by the gas turbine. The facility has the capacity to produce 21 MW of electricity, improving the customer's carbon footprint and providing greater certainty of electricity supply, and generates up to 88 tonnes of steam per hour. The facility supplies up to 171 GWh of electricity to the site annually with the excess electricity being exported to the grid. All steam generation is used by the plant.
Environmental Benefits
The facility generates electricity at a lower greenhouse gas emissions intensity than the average emissions intensity of generators in the National Electricity Market. Further savings are achieved because all waste heat from the gas turbine is used to produce the steam required by Qenos, removing the need to install separate gas fired boilers. With the facility supplying much of its electricity needs it is estimated that overall greenhouse gas emissions will be reduced by approximately 100,000 tonnes per annum.
The project was awarded the "Best CoGen Project" at the 2012 Energy Efficiency Council Industry Awards.
