12/3/12. Solar Decathlon Collegiate competition between 20 international teams held by US DOE Objective: Design Build Operate Design to be… Cost effective.

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Presentation transcript:

12/3/12

Solar Decathlon Collegiate competition between 20 international teams held by US DOE Objective: Design Build Operate Design to be… Cost effective Energy efficient Aesthetically pleasing

Location Irvine

Canopy House

Structural Perspective

Competition Journey Construct DeconstructShip CompetitionDeconstruct Construct ShipConstructEND

Modular Design

Product Selection Competition Rules Compromise between Engineering and Architecture Energy Efficiency System Compatibility Market cost Supply Cost – Biggest factor in product selection Guidelines

Energy Consumption

Solar…Sun Energy SolarMount Evolution (UNIRAC) –Compatibile with Canopy House Modular Design 43 Bosch Solar Module 255 Wp (Monocrystalline) Branches

Solar…Sun Energy Sunny Boy 8000 and 3000 inverters Tigo Energy Module Maximizer  Gateway and Management Unit  Web-based module level monitoring

Solar…Sun Energy kW per day

Solar…Sun Energy SunDrum Increases efficiency of solar panels by 7% Estimated 463 MJ of thermal energy produced per day

Solar…Sun Energy Integrated Solar Thermal System Radiant Flooring V V V PCM Storage Tank EHot Water Outlet SunDrum Hot Water Heater Cold Water Inlet

HVAC Selection Mitsubishi products: Wall-Mounted & Cassette style units Multi-Zone Capability i-See Sensor & Directional Vanes Redlink control Directional Air Flow

Max Cooling Capacity: Btu/hMax Heating Capacity: Btu/h HVAC Mini-Split Components Supply & Return - Units were initially selected based on estimated load requirements

House Total HVAC Loads ItemCooling Load (Btu/h)Heating Load (Btu/h) Envelope Ventilation Infiltration Fenstration Internal gain Total Load % Modification Factor *Modifies for best case scenario % Modification Factor *Modifies for worst case scenario Home HVAC Loads

Heat Collection SunDrum Floor Heating Load Calculations Heat Load Factor25% (best case)50% (worst case) Total Energy Available (BTU/hr)18,274.5 Heat load (BTU/hr)-11, , Net Heat Excess (BTU/hr)

Thermal Capacity Selected Vitocell–B dual heat exchanger as auxiliary storage tank System is comprised of a 30/70 ratio of water to phase change material To meet target temperature (120 °F ), Puretemp 48 was chosen as PCM

Static Thermal Capacity of Solar Tank Calculations Heat Load Factor25%50% Heat load (BTU/hr)-11, , Net Heat Available (BTU/hr)4, , Water Thermal Capacity (BTU/lbm) Water Storage Capacity (BTU)5, , Total Capacity [PCM + Water] (BTU)45, , Total Tank Standby Time (hr) Thermal Capacity

Radiant Flooring Hot Water Radiant Floor Heat Radiant Flooring Utilizes the excess heat stored in the water holding tank Multiple zones are supplemented by secondary heat source Decreases the heating loads that may be placed on the mini-splits.

Radiant Floor Heating Load Calculations Heat Load Factor25% (best case)50% (worst case) Heat load (BTU/hr)-11, , Water Cp (BTU/h-F)0.999 Water Mass Flow Rate (lbm/hr)681.6 Minimum Tank Temperature ( F) 9094  T to achieve Heat Load ( F) Radiant Flooring Heat Transfer Rate: Q = m*Cp*  T

Pressure Drop Calculations DescriptionNumber Cv Factor Total (ft) Ball Valves Tee Union10.44 Water Heater128 Pipe50 Total Pressure Drop (psi/ft)0.059 Total Pressure Drop (psi) Pump Selection

MQ Pump (Grundfos, Olathe, KS)

Fire Suppression All Solar Decathlon houses are required to have a wet sprinkler system to comply with: 2013 Solar Decathlon Building Code 2012 International Residential Code 2013 National Fire Protection Association System is separate & independent from potable supply water system Dedicated supply tank Dedicated pump for pressurization Dedicated piping system

Fire Suppression Tyco Rapid Response LFII Flush Residential Sprinkler Head ½” 20 x 20 Q = 22gpm P = 27.4psi Calculations (D) Density D = 0.1(gpm/ft 2 ) (Q END ) End Head Flow Rate (K) Coefficient of Discharge K = 4.2 (P END ) Pressure at End Head P = (Q/K) 2 Selection Criteria Temperature Rating Coverage Area Coverage Density Pressure Demands Sprinkler Head Selection Q END = 21.6gpm P END = 27.43psi

Electrical HUEE –Central Information Hub Security System Weather Application Indoor Temp Outdoor Temp Outdoor Humidity Energy Production Energy Consumption Media Streaming

Conclusion Accomplished – Designed Integrated Solar Thermal System – Energy Analysis of Canopy House – Sizing and Selection of Products – Design Development Deliverable Unaccomplished – Product Ordering (January 2013) – Final Construction Documentation (February 2013) – Construction of House (March 2013)

QUESTIONS…