Knox College

Knox College provides student accomodation and the wood fuelled boiler provides central heating.
Description of facility: 

Knox College had for years been heated by a sectional coal boiler. Faced with an expiring resource consent to emit discharges to air from the coal boiler, Knox College started to look for replacement options. Spark Energy was appointed to supply and install a new automated 540 kW KB Pyrot chip boiler and supply fuel-grade wood chips under a long-term supply agreement.

BEFORE AFTER
Boiler 800kW coal boiler 540kW KB Pyrot
Efficiency 65% (est.) 92% (TV test report)
Dust emissions n/a <50mg/m3 (TV test report)
Fuel Coal Wood chips
Fuel supplier Local coal supplier Spark Energy
Fuel contract Coal by weight Wood heat contract
Fuel feeding Auger stoker Automatic, sweeping arm
Fuel store n/r 32 m3
Ignition Automatic Automatic (electric heat gun)
Carbon emitted pa 420 tonnes (est.) nil (net basis)

Facility type: 
Heat
Application: 
Hotel/Rest Home/Accommodation
Fuel/Feedstock: 
Wood Fuel
Co-generation: 
No
Address: 
3 Arden Street North East Valley 9010
Region: 
Lower South Island
Geo Location: 
Fuel provider: 
Further information: 
Knox College: Spark Energy Case Study