ZEH HOME PROJECTTeam M.A.R.S.(Ryan McDevitt,

Matt Helm, Scott Klima, Abhinav Kalavar)

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

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

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*+

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

Passive Solar Design

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

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)

SketchUp Images

Top Floor View

March 21st

June 21st Summer Solstice

September 21st

December 21st Winter Solstice

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

Summary of Design: Exterior

Flat roof, lined with solar panels Wood Exterior Large Deck Bay Window amongst other south facing

windows

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

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