In this module, based on "Evaluating Value using Floor Areas," I designed two models: Gross Building Population and Annual Power Cost. The model is assumed to be a mixed-use building with office, residential, and commercial areas equally distributed.
- Gross Building Population:
Office Use: 100 sq ft/person (1/3 of total floor area)
Residential Use: 300 sq ft/person (1/3 of total floor area)
Commercial/Hotel Use: 150 sq ft/person (1/3 of total floor area)
Average Area per Person = (1/3) * (100 + 300 + 150)
Building Population = Total Gross Floor Area / Average Area per Person
- Annual Power Cost:
Office Use: 20 kWh/sg ft/year
Residential Use: 10 kWh/sg ft/year
Commercial Use: 30 kWh/sg ft/year
Average Power Consumption per Area = (1/3) * (20 + 10 + 30)
Total Power Consumption = Average Power Consumption per Area * Total Gross Floor Area
- Screenshot
- Building Population
- Annual Power Cost
- Custom Node
- Reported Data
Top Height (ft) | Top Rotation (deg.) | Gross Surface Area (SF) | Gross Floor Area (SF) | Gross Volume (CF) | Population | Annual Power Cost (USD) |
700 | 80 | 707960 | 3286868 | 32686615 | 24574 | 4829953 |
700 | 90 | 709754 | 3311977 | 32937816 | 24735 | 4838580 |
700 | 100 | 709708 | 3314983 | 32967803 | 24750 | 4847493 |
730 | 80 | 734211 | 3456226 | 34379993 | 25533 | 4832506 |
730 | 90 | 736607 | 3489096 | 34708742 | 25740 | 4840344 |
730 | 100 | 737022 | 3498041 | 34798074 | 25791 | 4848478 |
- Point to Ponder: Do the new evaluation metrics that you’ve designed capture the meaningful differences between the building form alternatives?
GBP highlights the building's ability to accommodate occupants effectively, while Annual Power Cost evaluates its energy efficiency and operational expenses, both crucial for understanding and comparing different building form alternatives in terms of functionality and sustainability.
- What other metrics would be useful to compute to help understand and make the case for which alternatives are truly better than others?
Other useful metrics include Annual Maintenance Cost to help in understanding long-term operational costs and budgeting, Wind Load to test structure safety, and Water Use to understand water consumption.