team m.a.r.s. (ryan mcdevitt, matt helm, scott klima, abhinav kalavar)
TRANSCRIPT
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ZEH HOME PROJECTTeam M.A.R.S.(Ryan McDevitt,
Matt Helm, Scott Klima, Abhinav Kalavar)
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Project Overview
Goals-To design and construct a model Zero Energy Home, while creating a practical living environment and still including all of the features we want in a house.
Important Features-Passive Solar Design-Efficient Appliances-Photovoltaic System-Man Cave-Geothermal Heating/Cooling
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Project Overview ContinuedLocation (city, state) Harrisburg, PA
House size (floor area in square feet) 4308
Number of floors 3
URL of web site where info is found
Number of occupants 4Number of bedrooms 5
Type of heating system (forced air, hydronic, radiant floor, heat pump, etc. Electric geothermal heat pump
Main heating fuel (electricity, natural gas, wood, oil, etc.) Electricity
Size of photovoltaic system (kilowatts) 8.9
Solar water heater (yes or no) YesR-value of wall insulation 36
R-value of ceiling insulation 60
Ventilation air heat recovery (yes or no) Yes
Predicted or measured annual energy use 7.59 kilowatts
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Appliance Selection
Mfg. Model # Capacity MEF WF
Annual Energy Use(kw
h/yr)
Annual Water
Use(gal/yr)
Energy Cost $/yr
Water Cost $/yr
Sewer Cost $/yr
Total
Op. Cost $/yr
Price Payback /yr
WhirlpoolWFW94HEX*+
4.33 3.21 2.7 561 4,990 $51.61 $19.96 $29.94$101.51
$726.25
Never
•Electric Geothermal Heat Pump•WhirpoolWasher
-Model WFW94HEX*+
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Passive Solar Design
Goal Window Area = 10% of 1st Floor Area Slab Area = 2-3 times the size Window Area on
1st floor Also within the range of the south facing
windows Results
Windows 1st Floor Window Area = 200ft3 1st Floor Area = 1840ft3
Window Area to Floor Area Ratio 10.9% Slab Area
Area = 780 Slab Area to Window Area Ratio = 3.9
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Passive Solar Design
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Solar Electric System
Panels Sunpower SPR-318-WHT-D 318W/panel Size of PV system: 8.9kW Reasons for using this model Number of panels: 28 (7 panels in series) Total Voltage: ~385V
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Solar Electric System (cont’d)
Inverter Sunny Boy 9000TL-US Max DC Power: 9400W Peak Power Tracking Voltage Range: 300V-
480V (mid-range of tracking voltage: 390V)
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SketchUp Images
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Top Floor View
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March 21st
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June 21st Summer Solstice
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September 21st
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December 21st Winter Solstice
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Summary of Design: Interior
Open interior Maximum potential of basement (Man
Cave) 5 bedrooms 3.5 bathrooms 4,308 ft2
Energy Efficient Appliances Hardwood floors, except carpet basement R-60 Ceiling insulation R-36 Wall insulation
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Summary of Design: Exterior
Flat roof, lined with solar panels Wood Exterior Large Deck Bay Window amongst other south facing
windows
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Summary of Design Chart
Windows27%
Walls31%
Roof11%
Floor20%
Infiltration11%
Envelope Heat Transmission
-$2,000
-$1,500
-$1,000
-$500
$0
$500
$190 $201 $256$119 $86
$188
-$129-220.640031261061
-60.6614343550167
-281.301465616077
-1169.46
Net Solar PV
An
nu
al C
ost
($)
Chart 1
Chart 2
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Reflection Google Sketchup Scale Modeling Efficient Heating Systems The utilization and benefits of Solar
Energy Difficulty creating a “realistic” ZEH
House size PV system size
Understanding impact on environment Teamwork
Time management Fair distribution of work