Journal Entry For
Module 7 - Building Envelope Systems
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For 2 Units
Materials:
Accessible Green Roof:
- Thickness: 1’ 5”
- Resitance: 24.84 (h*ft^2*F)/BTU
- Thermal Mass: 20.385 BTU/(ft^2*F)
Inaccessible Green Roof:
- Thickness: 2’ 1 11/4”
- Resitance: 132.329 (h*ft^2*F)/BTU
- Thermal Mass: 21.652 BTU/(ft^2*F)
Exterior Walls:
- Thickness: 1’ 2 1/8”
- Resitance: 53.053 (h*ft^2*F)/BTU
- Thermal Mass: 1.318 BTU/(ft^2*F)
Interior Walls:
- Thickness: 3”
- Resitance: 14.977 (h*ft^2*F)/BTU
- Thermal Mass: 2.874 BTU/(ft^2*F)
level 1 floor:
- Thickness: 1’ 1”
- Resitance: 17.586 (h*ft^2*F)/BTU
- Thermal Mass: 15.189 BTU/(ft^2*F)
Upper-level floors:
- Thickness: 10 1/4”
- Resitance: 54.985 (h*ft^2*F)/BTU
- Thermal Mass: 2.144 BTU/(ft^2*F)
Doors:
Windows:
Exterior Glazing Curtain Pannels:
Shading Systems:
- Awnings over main entry way and patio
- Decorative exterior wall on northern wing of building
For 3 Units
Initial Benchmark Comparison with no adjustments:
Baseline Benchmark:
Adjustments Made:
- Operating Schedule set to BIM
- Plug Load Efficiency set to 0.6W/sf
- Lighting Efficiency set to 0.3W/sf
- HVAC set to ASHRAE package
- Daylight and Occupancy Controls
Benchmark with Envelope Improvements:
Adjustments Made:
- Baseline Adjustments
- WWR set to BIM or better for all walls
- Infiltration set to BIM or better
- Window Glass set to TrpLoE for all walls
- Roof construction set to BIM or better
Benchmark with Envelope Improvements and PV panels:
Adjustments Made:
- All above
- 75-90% PV coverage
- 30 yr PV payback period
- 20.4% PV panel efficiency
For 4 Units
Illuminance Map:
Level 1
