Download - Zero energy Dream Home Lau’s Pals
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ZERO ENERGY DREAM HOMELAU’S PALS
Matthew Vincenzi, Stephen Sawa, Clinton Wright, Vincent VendettiMarch 2, 2011
LP
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PROJECT OVERVIEW Design a net zero energy dream home that would be
sustainable and energy efficient Important features:.Electric geothermalheat pump.double 2x4 10” foamWalls.ventilation air recovery
Location (city, state) Harrisburg, PAHouse size (floor area in square feet)
3011 ft2
Number of floors 2Number of bedrooms 3Type of heating system (forced air, hydronic, radiant floor, heat pump, etc.
Electric geothermal heat pump
Main heating fuel (electricity, natural gas, wood, oil, etc.)
elctricity
Size of photovoltaic system (kilowatts)
6 kW
Solar water heater (yes or no) YesR-value of wall insulation R-42R-value of ceiling insulation R-60Ventilation air heat recovery (yes or no)
yes
Predicted or measured annual energy use
7800 kWh/yr
Case Study
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APPLIANCE SELECTION We chose most efficient appliances regardless of price
because the payback would greatly reduce annual costs of the house:
Whirlpool WTW6340W clothes washer LG LFC25776 refrigerator Bosch Integra 500 SHX45P05UC dish washer
SunPower SPR-318-WHT-D solar panel Solar Inverter (for solar panels) Geothermal heat pump Solar water heater
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PASSIVE SOLAR DESIGN
Most windows on south facing wall to allow most light
Over hang on roof to shield some of the sunlight
South
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PASSIVE SOLAR DESIGN East and west walls
have multiple windows to let in light
Slabs that get direct sunlight from south and east facing windows
East
West
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SOLAR ELECTRIC SYSTEM Twenty-four 318 W
61x41” solar panels
PV powered solar inverter (54.7v)
6 kW PV system
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IMAGES: VERNAL EQUINOX
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IMAGES: VERNAL EQUINOX Here we
can see the effects of the overhangs
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IMAGES: SUMMER SOLSTICE continued
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IMAGES: SUMMER SOLSTICE
Solar panels receive most direct sunlight during these summer months
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SUMMARY OF DESIGNPenn State Center for Sustainability
Zero Energy Home Calculator
General Info Heating & Cooling
Location Harrisburg Type of heating & cooling system
Electric geothermal heat pump
Electricity cost ($/kwh) 0.1 Solar Technologies Conditioned floor area
(sq.ft.) 3011 Size of PV system (kw) 6.0
Number of bedrooms 3 Solar water heater YesEnvelope Details Behavior
Wall constructionDouble 2x4
with 10" foam Water conservation A lot
Ceiling Insulation R60 Uses clothesline A lotWindow typeTriple low-e Thermostat setback A lot
Upper floor ceiling area (sq.ft.) 1273
Heat thermostat setting (F) 70
North wall area (gross) (sq.ft.) 1504
Cool thermostat setting (F) 76
East wall area (sq.ft.) 333South wall area (sq.ft.) 406West wall area (sq.ft.) 220
North window area (sq.ft.) 93
East window area (sq.ft.) 179
South window area (sq.ft.) 346
West window area (sq.ft.) 68
Air tightness
Tight with heat
recoveryAppliances
Refrigerator BestClothes Washer BestDishwasher BestAmount of other appliances A lot less
Envelope Heat Trans-mission
Windows50%
Walls18%
Roof8%
Floor15%
Infiltration8%
Envelope Heat Trans-mission
-$1,200-$1,000
-$800-$600-$400-$200
$0$200$400
$144$162$208$89 $55$132 $2-165.48064881
8166
-97.227980545
9651-
262.708629364131
-788.4
Ann
ual C
ost(
$)
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SUMMARY
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REFLECTION1. We learned about calculating energy usages, and efficiencies in way that would help us to
design a sustainable, zero energy home.2. Understanding house systems helps us to understand how other machines and vehicles use
energy in all other aspects of our world. 3. We learned that solar energy is very efficient and is capable of providing us with a lot of
energy that is needed to run our homes.4. Zero energy homes don’t necessarily use zero energy, but they significantly reduce energy
usage. Zero energy homes are made up of many other energy efficient appliances and systems that help it run.
5. Learning how to allocate and complete jobs efficiently are significant experiences that help with future teamwork experiences.
6. How can you improve your team’s performance on the next project?7. We could probably do a little more detailed and thorough planning for our next project, but in
general we did a good job working as a team.8. What do you remember most about using SketchUp?9. SketchUp was an relatively straight forward program that helped us layout the design of our
house, and the final product of our house was the most memorable part of using sketchUp.