City-Wide Renewable Energy Utilisation System in Christchurch (NZ)
Between 2006 and 2010, Christchurch has developed and implemented a comprehensive and integral system for the utilisation of bio energy (biogas, biomass, biodiesel) across the city, with an objective to make a significant break-through towards renewable energy at the city public buildings and facilities.
While individual components of the system are well known and proven technologies, the use of them in an integral system allows to utilise the available renewable energy resources in the most efficient manner. This is achieved by the use of various energy conversion technologies and by the elimination of the need to flare excessive amounts of biogas. The system includes the installation of a tri-generation plant at the Christchurch Civic Building that uses biogas for simultaneous generation of electricity, heat and refrigeration, which provides best possible efficiency all year round.