Above is my original design before the energy analysis. I incorporated south facing curtain walls to maximize daylighting and also added curtain walls / sky light to the central atrium/staircase that spans all levels through the core. I also wanted to add a shading element to the bottom floors to help cool the ground surface and create an illusion that the visitor is inside.
I know there was more work to be done polishing up my system envelope including consistent windows (curtain walls), doors, facades, holes in roof etc. Because of these incompletions in my design, I had an original energy demand of roughly 126 kBtu / ft² / yr which was pretty alarming.
I took some time to add more finishes to the design including doors, and ceiling lights. I also decided to upgrade all the exterior walls to EIFS on mtl stud which has a high R value of 66 compared to the original of 0. This change will result in less heat exchange across the envelope.
I also added an additional layer of insulation to the generic floors, raising the R value to 27. And below you can see where I modified the glazed system panels to increase R value and reduce heat transfer of all my curtain walls
After closing up all the holes and open spaces I decided to generate a new model and hope that reflects some of the changes I made.
Surprisingly I was still at a mean energy intensity of 126!!!? But I sorted the insights by order of importance and was able to quickly reduce my EIU to 46.
The changes, from highest to lowest impact:
- HVAC: utilize high efficiency heat pump
- Operating schedule: BIM/smart building operating schedule
- wall construction: increasing R value to at least R13+R10 metal… current design walls have R-value of 66
- roof construction: adding insulation
- not sure what the best roof combo is but working on it. will maintain layer of insulation.
- Infiltration: setting to BIM control
- PV - surface coverage: adding 60% surface coverage (hoping this is possible)
- PV - payback limit: extending over time to 30 years
Most updated design
Still working on making the exterior more cohesive and choosing final architectural elements
Questions for dan
- adding doors to curtain walls
Notes:
- might not need R66 for walls
- roof assembly/construction layers.. is EIFS
- look into white TPO membrane
- window to wall ratio
- potentially decrease around the stair
