Energy efficiency is repeatedly referred to as the 'low-hanging fruit' of carbon emissions reductions. When it comes to conventional fossil-fuel power production, much of energy from the fuel burned is let off in waste heat. Cogeneration and Trigeneration are two technologies that seek to put the escaped heat to use instead.
Cogeneration - the process where heat and electricity are produced simultaneously - is the predecessor and brother of Trigeneration which produces cooling, heating and electricity for buildings. Both cogeneration and trigeneration systems can potentially operate using a number of different input fuel stocks (usually natural gas, but also including biomass), and can be run on the small- to medium-scale in decentralised units. Cogen/Trigen systems can be used to achieve elevated Green Star ratings in individual buildings, but the City of Sydney is looking to take trigen to the next level--with plans to eventually install 7 medium-scale trigen plants with a total capacity of 325MW around the CBD in the next 15 years. The move could potentially enable the CBD to take itself off the electricity grid.
Check out this video of City of Sydney CEO Monica Barone discussing Sydney's 'Clean Energy Future':
New UNSW Climate Change Comedy Series
UNSWTV has joined forces with Amanda Keller and HG Nelson to create a new mock comedy series about climate change.
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