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Renewable Energy Project Analysis Course - Module 6Renewable Energy Project Analysis Course - Module 6
• Heat from a central plant can be distributed to multiple Heat from a central plant can be distributed to multiple nearby buildings for heating and service hot waternearby buildings for heating and service hot water Insulated steel pipes are buried 0.6 to 0.8 m underground
• Advantages compared to each building having own Advantages compared to each building having own
Example: Austria, Germany and SloveniaExample: Austria, Germany and Slovenia
Community Energy SystemsCommunity Energy Systems
• Groups of buildings Groups of buildings including schools, hospitals, including schools, hospitals, and clusters of residencesand clusters of residences
Photo Credit: Ken Sheinkopf/ Solstice CRESTPhoto Credit: Centrales Agrar-Rohstoff-Marketing-und Entwicklungs-Netzwerk
Automatic Feedstock Handler
Wood-Fired BoilerDH Converted from Fossil Fuel to Biomass, Slovenia
Example: CanadaExample: Canada Institutional and Commercial BuildingsInstitutional and Commercial Buildings
• Individual buildings can provide their own heat Individual buildings can provide their own heat from biomassfrom biomass Institutional: schools, hospitals, municipal buildings
Commercial: stores, garages, etc.
Photo Credit: ECOMatters Inc. Photo Credit: Grove Wood HeatSmall Commercial Biomass Heating System, Canada
• Often used where biomass is produced and Often used where biomass is produced and process heat requiredprocess heat required Saw mills, sugar and alcohol factories, furniture manufacturing
sites, and drying sites for agricultural processes.
Photo Credit: Ken Sheinkopf/ Solstice CRESTPhoto Credit: Ralph Overend/ NREL PixPhoto Credit: Warren Gretz/ NREL Pix
RETScreenRETScreen® ® Biomass Heating Biomass Heating Project ModelProject Model
• World-wide analysis of energy production, life-cycle World-wide analysis of energy production, life-cycle costscostsand greenhouse gas emissions reductionsand greenhouse gas emissions reductions
Individual buildings to large clusters with district heat
Biomass, peak, back-up and waste-heat recovery
Sizing and costing of district heat pipingnetwork
• Currently not covered:Currently not covered:
Large scale district heating not validated(>2.5 MW)
• Biomass heating energy costs can be much lower than Biomass heating energy costs can be much lower than conventional heating costs, even when considering conventional heating costs, even when considering higher initial capital costs of biomass systemshigher initial capital costs of biomass systems
• RETScreenRETScreen®® calculates load duration curves, required calculates load duration curves, required biomass and peak plant capacity, and district heating biomass and peak plant capacity, and district heating network pipe sizes using minimal input datanetwork pipe sizes using minimal input data