Full View of Energy Supply and Demand Narrative (note that the following slide contains embedded links)

3000 ft2 PV size and type John Scofield paper on monitoring a solar academic building Energy Supply and Demand Narrative John Scofield paper on performance for Jasper Ridge Heat Recovery From Gray Water Narrative Monthly Water Flow Monthly Heat Flow Water flow diagram Water tank capacity Shower Drain Temperature Daily water volume per tank Well capacity Seasonal ground water temperature Capacity factor Fuel Cell Narrative Energy from fuel cell Fuel cell size Solar Hot Water Narrative Area of solar water array Efficiency Insolation Photovoltaic Array Narrative 64,431 kWh/yr Jasper Ridge PV Performance Since 10/2002 Elect: 404 MMBtu Heat: 296 MMBtu NatGas: -389 MMBtu Energy from Solar Hot Water Number tanks = 1 Size = 2,000 gal NEED gal/min 35 MMBtu/yr Pump 1: NEED  F Pump 2 NEED  F NEED gal/min 680 gal/day Cf = 90% 5KW CHP Energy Balance 0 = Supply – Demand [BTU/yr] 92 MMBtu/yr 5kWh/m2d 40 % 475 ft2 Building Geometry Energy Supply Narrative ~100ºF (1000 ft2) Back of Envelope Array Size Energy from Photovoltaic Array ~1.4 [m3/day] Bioreactor Site Building layout Equest energy analysis Building geometry Equest simulation assumptions Comparison for consistency Back of the envelope energy consumption Energy Demand Narrative Total: 54,423 kWh/yr 199 MMBtu/yr Building Energy Demand Heat Pump Energy Conversion Energy from building graywater Electricity Supply 54,423 kWh/yr Heat Supply 120 MMBtu/yr (85+35) Natural Gas From Utility 79 MMBtu/yr (80.1 MMBtu) source 35 MMBtu/yr - 2,188 kWh/yr Heat Not used 7 MMBtu/yr BioGas production Excess Electricity back to grid 7820 kWh/yr (80.1 MMBtu) source eQuest Natural Gas Demand 79 MMBtu/yr eQuest Electricity Demand 54,423 kWh/yr eQuest Heat Demand 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.