Your building envelope recommendations for this practice exercise should feature:
- Your recommended settings for the Insight Factor tiles
- A screenshot from Insight showing the Predicted Mean EUI and the range of values resulting from your assumptions
- The Original Model
The figure above shows the original BIM model provided. After running the model and generate the result in insight, we got the following result:
The result of starting predicted EUI is 74.4 kBtu/ft2/yr, which is not the same as given(81.3 kBtu/ft2/yr).
After setting the these values as baseline assumptions:
- Operating Schedule to 12/5
- Roof Construction to R38
The resulted EUI is 51.4 kBtu/ft2/yr.
- Use Insight to Explore the Impact of Building Envelope-Related Design Decisions
- Use the Insight Factor tiles to find a combination that will deliver the target Predicted Mean EUI of 54 kBtu/ft2/yr or lower. This is already achieved by setting our base factors above.
- Consider these Factors:
- Thermal Properties of Wall Surface (Wall Construction) for all orientations
- Glazing % (Window-to-Wall Ratio) for each orientation (North, South, East, West)
- Thermal Properties of Glazing Surfaces for each orientation
- Window Shading amount for each orientation
Since the target predicted EUI is already chieved, we make some reasonable changes to further optimize it.
Some changes we make:
WWR - Western Walls : 0% (The major impact)
WWR - Southern Walls : 30%
WWR - Eastern Walls : 30%
Wall Constructions: Some limitations are set
The resulted expected EUI is 39.8 kBtu/ft2/yr.
- Use Insight to Explore the Potential Impact of Power and Lighting Measures (versus Building Envelope Measures)
- Use the Insight Factor tiles to explore the impact of:
- Plug Load Efficiency (the equipment and appliances that draw power): 0.6 W/sf
- Lighting Efficiency (based on the efficiency of the lighting fixtures): 0.3 W/sf
- Daylighting & Occupancy Controls: Occupancy Controls
- How low can you drive the Predicted Mean EUI by adding these power and lighting measures to your recommended building envelope choices?.
- Use Insight to Explore the Benefits of Adding Photovoltaic Panels to Your Design
- Use the Insight Factor tiles to explore the impact of Photovoltaic Panels, varying the:
- Surface Coverage : 90%
- Panel Efficiency: 20.4%
- Payback Limit (how many years you will allow for the panels to pay for themselves: 20-30 yr
- How low can you drive the Predicted Mean EUI by adding these Photovoltaic panel measures to your overall design strategy?
The resulted EUI is further reduced to 24.0 kBtu/ft2/yr.
The resulted EUI is -18.0 kBtu/ft2/yr, which is much lower than the ARCH 2030(9.2 kBtu/ft2/yr).