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Zero Energy Home Rob, Alex, Karen, Iman. Project Overview. Project Goals: Creating a Zero Energy Home that is still our dream home where we would all desire to live. Designing in a way that is energy efficient and aesthetically pleasing. Important Features:

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Presentation Transcript
project overview
Project Overview
  • Project Goals:
  • Creating a Zero Energy Home that is still our dream home where we would all desire to live.
  • Designing in a way that is energy efficient and aesthetically pleasing
  • Important Features:
  • 2 story arched windows on South wall
  • Spiral staircase
  • 2 story sunroom with mass floor
  • Solar water heater
  • Open kitchen
  • TV / media room
  • Best for family of 4-6 people
research summary
Research Summary
  • Typical Characteristics of ZEH based on team research:
  • All homes researched under 2000 sq. ft.
  • Ventilation air heat recovery and solar water heater systems
  • Most common heating system – heat pumps
  • Photovoltaic systems range from 4.2-8.2 kW in size
research summary1
Research Summary
  • 1152 sq. ft.
  • 1949 kWh used and 4892 kWh produced annually

-light skirt glows red when using energy from grid and green when producing more than it uses

- ZEH can be simple, unique, unusual or anywhere in between

2000 sq.ft. home with only a 4.2 PV system

envelope
Envelope
  • 473 sq. ft. of windows main cause of air leakage
  • Ceiling R value of 60
  • Double 2x4 wall construction with 10” insulation
  • Double low e windows
  • -chose cheaper model because triple low e let out less heat but also let in less passive solar heat.
  • -about the same efficiency
  • Air tight with heat recovery
  • -utilizing this option allowed us to decrease size of PV system
appliances
Appliances
  •  Amana 24.9 Cu. Ft. French Door Refrigerator
  • 683 kWh/year
  • $1708.20
  • Yearly opp costs $73
  • Not Energy Star
  • Most cost efficient
  • Sony 46” LCD Television
  • 213 kWh/year
  • $989.99
  • Yearly opp costs $21.30
  • Not most energy efficient
  • Best choice economically
appliances1
Appliances
  • GE 24 In. Built-In Dishwasher
  • 324 kWh/year
  • $299.99
  • Yearly opp costs $28
  • Energy Star
  • Most efficient for economic value
  • Whirlpool Lunar Silver Duet HE 4.4 cu
  • - 183 kWh/year
  • $980.99
  • Yearly opp costs $25
  • Energy Star
  • More expensive – ten years to pay back cost difference
slide8
HVAC
  • Electric High Efficiency Heat Pump
  • More than 100% efficient
  • Only small system necessary due to passive solar
  • Delivers both heating and cooling
  • Utilizing high efficiency dropped pv system size by .5 kW
  • Saved $86 in utilities

Duct Location: Inside thermal envelope

solar technologies
Solar Technologies

Solar Water Heater Utilized

  • 7.3 kW PV System
  • 30 panels needed
  • SolarWorldSunmodule+
  • 245 watt panels
  • $661.81 per panel
  • Cheap model with correct dimensions to support our energy needs
passive solar
Passive Solar
  • 3’ Overhang shades 2nd story windows on South walls in summer
  • 383 sqft of windows on South wall
  • 2 story bay windows
  • Mass floor
  • Smaller windows for bedrooms
  • Open spaces for air circulation
behavior
Behavior
  • Frequent use of clothes line (save energy on dryer use)
  • Water Conservation
  • - air drying dishes
  • - short showers
  • - low water settings on clothes washer
  • - Very few extra appliances
  • Regulating home temperatures
  • Summer above 76°
  • Winter 68-70°
  • Recycling Practices
  • Compost pile
key decisions
Key Decisions

Realized necessity to use heat recovery based on number of air changes/ hour

- Very few extra appliances to utilize less energy

- Change practices (air drying) to control energy use

sketchup model
SketchUp Model

North Wall – Front of House

slide16

Shadow in November at noon

Shadow in June at noon

summary
Summary
  • Important Aspects:
  • 2 story arched windows for passive solar
  • -383 sqft windows on mass wall
  • Open spaces on 1st floor for air circulation and large windows
  • Tight with heat recovery
  • High efficiency heat pump
  • Solar Water Heater
  • 7.3 kW PV System
  • Combination of both ordinary and energy efficient appliances
  • Lessons Learned
  • Teamwork – task distribution
  • Solving design complications with the size and dimensions of our home
  • Understanding our environmental impact (Footprint calculator)
  • Interrelation of classroom lessons and their applicability to real design
slide20

Greatest Challenges:

  • Cutting down on size while maintaining all desired features
  • Understanding the real life size of our 2852 sqft. home
  • Choosing between energy efficiency and cost efficiency
  • Favorite Features:
  • Alexandra loves the 2 story arched windows and the way the light shines in on our open sunroom.
  • Karen likes the openness of the house.
  • Rob likes the spiral staircase and how it can be viewed through the large back windows
  • Iman loves the aesthetic look of the house from the back (South wall view).
reflection
Reflection

After completing our ZEH project, we can now understand…

- how parts of a system interrelate especially those dealing with energy

- how to utilize SketchUp and SolidWorks to bring our ideas to life

- that solar energy can be used in combination with energy from the grid but greatly contributes to reducing nonrenewable energy resources

Zero Energy Homes…

- Do not have to be ugly or bizarre to be efficient and effective

- Can still have the qualities of you dream home while lessening your ecological footprint

- Are still connected to the grid but create as much energy as they use

- Work best when combined with sustainable practices and behavior

reflection1
Reflection

Working as a team could be improved by…

- more efficient and assertive task delegation

- having better and more open communication

- a more equal distribution of individuals work loads

On the next project…

- we will start earlier and spread the work out over a longer period of time

- we will improve at delegating tasks and making sure everyone participates fully

- our team will try to better visualize the end product from the beginning of our design process

We remember most about using SketchUp…

- that layers are very helpful in the design process

- that after becoming more comfortable with the software we created a more intricate model

- that precision from the earliest stages is important because imperfections cannot be easily fixed and can slow results later