# Weixuan Lu - Module 6

Journal Entry For
Module 6 - Evaluate Your Alternatives

The original building form

The recommended building form based on your evaluation and analysis

### Step 1

Workflows for step 1. The two metrics I evaluated are construction costs and solar electricity revenues. Below are the custom nodes.

BuildingFormEvaluateValueByFloorAreaForTwoInputs

The two metrics I evaluated. More custom nodes are displayed below.

MassFloors

EstimateCostByFloorLevel

SelectGroundOrNongroundSurfaces

CustomedSolarAnalysis

I only considered self-shading here. I think considering surrounding buildings is not fair for the comparisons.

### Step 2

I copied the table from the spreadsheet exported from Dynamo. Here, I recorded everything. The gross floor area always falls between 1,200,000 and 1,500,000 sf.

 Test Cases Building Width (’) Top Rotation (°) Gross Floor Area (SF) Gross Surface Area (SF) Gross Volume (CF) Construction Costs (\$) Solar Electricity Revenues (\$) 1 180 30 1214994 524599 18224817 1250570273 20197335 2 180 45 1214969 524922.1 18224314 1250550296 21483900 3 180 60 1214903 525367.1 18223116 1250496659 19923381 4 180 75 1214764 525924.9 18220764 1250383961 17593695 5 180 90 1214513 526587.6 18216820 1250179900 15992445 6 190 30 1353743 556623.6 20306041 1393382310 24291095 7 190 45 1353716 557002 20305541 1393360052 24975088 8 190 60 1353642 557523.2 20304111 1393300289 23458592 9 190 75 1353487 558179.5 20301535 1393174722 23148064 10 190 90 1353208 558959.7 20297042 1392947357 21130354 11 200 30 1499992 588952.8 22499815 1543913917 25681247 12 200 45 1499962 589392.4 22499121 1543889254 25958662 13 200 60 1499880 589999.7 22497642 1543823035 24888040 14 200 75 1499709 590764 22494797 1543683903 23058596 15 200 90 1499399 591675.1 22489796 1543431975 21099453

### Step3

I used the spreadsheet to determine the optimization scheme. The instruction said I could either choose to do it in Dynamo or a spreadsheet, so I did not create a Dynamo workflow for this part.

• What metrics are most important? Both are equally important.
• How do they interact? Revenues can be directly subtracted from costs.
• Is there a tradeoff? Yes. The ones with higher construction costs tend to have higher revenues.
• How can you weight or scale the values returned by your evaluation metrics to compare them? I don’t need to weigh or scale them. I can directly calculate them to find the optimization scheme.
• Can you create a new single measure that incorporates the individual metrics in a sensible way? I can add nodes in Dynamo to calculate the net costs. I can also calculate them in the spreadsheet.
 Test Cases Building Width (’) Top Rotation (°) Gross Floor Area (SF) Gross Surface Area (SF) Gross Volume (CF) Construction Costs (\$) Solar Electricity Revenues (\$) Net Costs (\$) 1 180 30 1214994 524599 18224817 1250570273 20197335 1230372938 2 180 45 1214969 524922.1 18224314 1250550296 21483900 1229066396 3 180 60 1214903 525367.1 18223116 1250496659 19923381 1230573278 4 180 75 1214764 525924.9 18220764 1250383961 17593695 1232790266 5 180 90 1214513 526587.6 18216820 1250179900 15992445 1234187455 6 190 30 1353743 556623.6 20306041 1393382310 24291095 1369091216 7 190 45 1353716 557002 20305541 1393360052 24975088 1368384963 8 190 60 1353642 557523.2 20304111 1393300289 23458592 1369841697 9 190 75 1353487 558179.5 20301535 1393174722 23148064 1370026659 10 190 90 1353208 558959.7 20297042 1392947357 21130354 1371817004 11 200 30 1499992 588952.8 22499815 1543913917 25681247 1518232670 12 200 45 1499962 589392.4 22499121 1543889254 25958662 1517930592 13 200 60 1499880 589999.7 22497642 1543823035 24888040 1518934996 14 200 75 1499709 590764 22494797 1543683903 23058596 1520625307 15 200 90 1499399 591675.1 22489796 1543431975 21099453 1522332522

The added column shows the net costs. The lower ones are better.

### Step 4

 Test Cases Building Width (’) Top Rotation (°) Gross Floor Area (SF) Gross Surface Area (SF) Gross Volume (CF) Construction Costs (\$) Solar Electricity Revenues (\$) Net Costs (\$) 2 180 45 1214969 524922.1 18224314 1250550296 21483900 1229066396 1 180 30 1214994 524599 18224817 1250570273 20197335 1230372938 3 180 60 1214903 525367.1 18223116 1250496659 19923381 1230573278 4 180 75 1214764 525924.9 18220764 1250383961 17593695 1232790266 5 180 90 1214513 526587.6 18216820 1250179900 15992445 1234187455 7 190 45 1353716 557002 20305541 1393360052 24975088 1368384963 6 190 30 1353743 556623.6 20306041 1393382310 24291095 1369091216 8 190 60 1353642 557523.2 20304111 1393300289 23458592 1369841697 9 190 75 1353487 558179.5 20301535 1393174722 23148064 1370026659 10 190 90 1353208 558959.7 20297042 1392947357 21130354 1371817004 12 200 45 1499962 589392.4 22499121 1543889254 25958662 1517930592 11 200 30 1499992 588952.8 22499815 1543913917 25681247 1518232670 13 200 60 1499880 589999.7 22497642 1543823035 24888040 1518934996 14 200 75 1499709 590764 22494797 1543683903 23058596 1520625307 15 200 90 1499399 591675.1 22489796 1543431975 21099453 1522332522

This is the one with filtered and ranked results.

These are the top three options.

I recommend the second test case. This one has a low construction cost but high revenue from solar electricity generation, so the net cost is the lowest.

This may be due to the addition of areas for solar panels. My strategy is to add solar panels all over the facades, not just the roof.

### Step 5

I did the scheme optimization in the spreadsheet, so I just selected the best case in Dynamo. I used the following custom node to select wall surfaces.

From the background, you can see the UV grid of points being created.

### Step 6

Then I used my workflow in Module 4, Part 2, to define the panels’ color, width, and thickness based on the sun's positions. I used three custom nodes, which I had already described in Module 4, Part 2. Below is the Revit model.