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Full View of Energy Supply and Demand Narrative (note that the following slide contains embedded links). Site. Back of the envelope energy consumption. Building layout. eQuest Electricity Demand. 54,423 kWh/yr. eQuest Heat Demand. 120 MMBtu/yr. eQuest Natural Gas Demand. Natural Gas - PowerPoint PPT Presentation
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Full View of Energy Supply and Demand
Narrative (note that the following
slide contains embedded links)
3000 ft2
PV sizeand type
John Scofield paperon monitoring a solar academic building
Energy Supply and Demand Narrative
John Scofield paperon performance forJasper Ridge
Heat Recovery From Gray Water Narrative
Monthly Water FlowMonthly Heat Flow
Waterflow diagram
Water tank capacity Shower Drain
Temperature
Daily water volumeper tank
Well capacity
Seasonal ground water temperature
Capacityfactor
Fuel Cell Narrative
Energy from fuel cell
Fuel cell size
Solar Hot Water Narrative
Area of solar water array
EfficiencyInsolation
Photovoltaic Array Narrative
64,431 kWh/yr
Jasper RidgePV PerformanceSince 10/2002
Elect: 404 MMBtuHeat: 296 MMBtu
NatGas: -389 MMBtu
Energy from Solar Hot Water
Number tanks = 1Size = 2,000 gal
NEED gal/min
35 MMBtu/yr
Pump 1: NEED FPump 2 NEED F
NEED gal/min
680 gal/day
Cf = 90%
5KW CHP
Energy Balance
0 = Supply – Demand[BTU/yr]
92 MMBtu/yr
5kWh/m2d40%
475 ft2
Building Geometry
Energy Supply Narrative
~100ºF
(1000 ft2)
Back of EnvelopeArray Size
Energy from Photovoltaic Array
~1.4 [m3/day]
Bioreactor
Site
Building layout
Equest energy analysis
Building geometry
Equest simulationassumptions
Comparison for consistency
Back of theenvelope energyconsumption
Energy Demand Narrative
Total: 54,423 kWh/yr199 MMBtu/yr
Building Energy Demand
Heat Pump
Energy Conversion
Energy from building graywater
ElectricitySupply
54,423 kWh/yr
HeatSupply
120 MMBtu/yr(85+35)
Natural GasFrom Utility
79 MMBtu/yr(80.1 MMBtu) source
35 MMBtu/yr- 2,188 kWh/yr
HeatNot used
7 MMBtu/yr
BioGas production
ExcessElectricityback to grid
7820 kWh/yr(80.1 MMBtu)source
eQuestNatural GasDemand
79 MMBtu/yr
eQuestElectricityDemand
54,423 kWh/yreQuestHeatDemand
120 MMBtu/yr
Utility Balance
Caption for Energy Narrative• The Energy Supply and Demand Narrative is a snapshot of the status of the
design of the energy systems for the Stanford Green Dorm by the end of the Feasibility Study (mid February, 2006). It reflects the alternatives discussed, analyzed and discarded to achieve a Zero Energy Goal, one of the product functional requirements requested by the owner.
• The Energy Narrative has three types of sub-narratives: the Energy Supply Narrative (blue); the Energy Demand Narrative (red) and the Utility Balance Narrative (purple). The first is divided into other sub-narratives which are the different sources of energy explored during the design to provide on-site energy generation. The second is the narrative describing the model-base demand of the building calculated using eQuest with a set of assumptions about the use, size, shape and material properties of this living lab. The third is a simple narrative that shows the energy exchange with the utilities (electricity and natural gas).
• The Energy Supply Narrative is subdivided into six narratives. Each of them details the sources of onsite energy generation explored during the feasibility study to match the energy demand. The two grayed-out narratives (fuel cell and bioreactor) denote two alternatives explored, but not included in the energy balance to achieve the zero energy goal. Their dependencies with the overall energy balance are shown with dashed lines to point out what their potential impact could be.
• The perspectives labeled “NEED” denote information that is missing. It usually correspond to discussions held within the design team, but that didn’t translate into formalized design alternatives.