Tahuna Normal Intermediate School

Tahuna replaces an ageing coal boiler with a new wood fueled boiler
Description of facility: 

Tahuna Normal Intermediate School located in St. Kilda, Dunedin, had been heated by a section coal boiler fed by a day hopper. The inefficient Colonel style boiler required daily manual feeding, regular ash removal with a shovel and ongoing cleaning by the caretaker. In 2008 Spark Energy was appointed to supply and install a new 400 kW KB Pyrot wood chip boiler.
BEFORE AFTER
Boiler 600kW coal boiler 400kW KB Pyrot chip boiler
Efficiency 60% (est.) 92% (TV test report)
Dust emissions n/a <50mg/m3 (test report)
Fuel Coal Wood chips
Fuel supplier Local coal supplier Spark Energy
Fuel feeding Auger-based Automatic, sweeping arm
Fuel store n/r 24 m3 working capacity
Ignition n/a Automatic (electric heat gun)
Carbon emitted pa [x] tonnes (est.) nil (net basis)

Facility type: 
Heat
Application: 
School
Technology type: 
Conventional Combustion
Fuel/Feedstock: 
Wood Fuel
Primary Output: 
Heat
Co-generation: 
No
Address: 
Auld Street, Dunedin
Region: 
Lower South Island
Geo Location: 
Owner: 
Tahuna Normal Internediate School, Dunedin
Equipment supplier: 
Spark Energy