BIMtopia

Practice Exercise: Building Envelope Systems

Your Name
Katie Wheeler

Once I opened the file within Insight, this is what was shown:

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Once entering in the baseline assumptions, this was the starting point for analysis:

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Best result predicted mean EUI achievable through Building Envelope-Related Design Decisions:

The target Predicted Mean EUI of 54 kBtu/ft2/yr or lower.

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I was able to get the predicted mean EUI down to 51.5 kBtu/ft2/yr.

  1. Recommendations I used for the following Factors:
    1. Thermal Properties of Wall Surface (Wall Construction) for all orientations
      1. R-38 Wood
    2. Glazing % (Window-to-Wall Ratio) for each orientation (North, South, East, West)
      1. 65% Southern WWR
      2. 15% Northern WWR
      3. 15% Western WWR
      4. 0% Eastern WWR
      5. 0% for all orientations resulted in the lowest EUI, but that would be unrealistic. Therefore, I chose percentages that would be more likely, and made the southern WWR higher for passive heating and cooling potential.
    3. Thermal Properties of Glazing Surfaces for each orientation
      1. North- double LoE
      2. South- triple LoE
      3. East- double Clr
      4. West- triple LoE
    4. Window Shading amount for each orientation
      1. South= 1/4 height
      2. North= 1/4 height
      3. East= 1/4 height
      4. West= 1/3 height
  2. Screenshots of Inputs
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Best result predicted mean EUI achievable through building envelope + Power and Lighting Measures:

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I was able to get the predicted mean EUI down to 31.6 kBtu/ft2/yr.

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  1. Recommendations I used for the following Factors:
    1. Plug Load Efficiency (the equipment and appliances that draw power):
      1. 0.6 W/SF
    2. Lighting Efficiency (based on the efficiency of the lighting fixtures)
      1. 0.3 W/SF
    3. Daylighting & Occupancy Controls
      1. Utilizing daylighting and occupancy controls
  2. Ideally, we would utilize both daylighting and occupancy controls to bring the overall W/SF down. We would also attempt to make both of the plug load and lighting efficiencies to a lower W/SF to minimize energy usage on a yearly basis.

Best result predicted mean EUI achievable through Adding Photovoltaic Panels to my Design:

I was able to get the predicted mean EUI down to -9.98 kBtu/ft2/yr.

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  1. Recommendations I used for the following factors:
    1. Surface Coverage
      1. 90%
    2. Panel Efficiency
      1. 20.4%
    3. Payback Limit (how many years you will allow for the panels to pay for themselves
      1. 20 years

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I will take these recommendations of limiting the WWR on the eat and west orientations, maximizing the southern WWR, upgrading the plug load and lighting efficiencies, and adding Photovoltaics in order to reduce cost and energy needs on a yearly basis.