What is the impact of Passive and Active measures on the overall pEUI (kBtu/ft2) of a 20-story office building?



Submitted by:  Olivier

Firm Name: Skidmore, Owings and Merrill LLP

ASHRAE Climate Zone: 3C

Building/Space Type:

  • Office

Who performed the simulation analysis?  

  • Architect - Internal Sustainability Personnel

What tools were used for the simulation analysis? 

  • EnergyPlus

What phase of the project was analysis conducted?  

  • Conceptual Design

What are the primary inputs of the analysis?  Orientation, Window-to-wall ratio, Double Glazing, SHGC, R-Value Wall, Plug Load Density, Dayligthing Sensors, Light Power Density, HVAC system

What are the primary outputs of the analysis?  predicted Energy Use Intensity, Cost Savings %, LEED Points


List the investigations questions that drove your analysis process.

To understand the magnitude impact of design decisions very quickly and simultaneously.An interactive engaging exploration tool reading pre-run simulations. Leverages high multidimensional results of large-scale dataset.

How was simulation integrated into the overall design process?


How did you set up the simulation analysis and workflow?

- Used D3 - a JavaScript library for producing dynamic, interactive data visualizations in web browsers. - Download d3.parcoords (parallel coordinates) open source code - Modify & add Functionalities to the code - Ran a shoebox energy model using jEplus and Open Studio - Created an excel spreadsheet csv file with inputs and outputs - Link the database csv file to the D3 HTML code - Designed and Formatted with the firm Standard - Visualized the tool running a Javascript Node Server locally or on an intranet server

How did you visualize the results to the design team? What was successful about the graphics that you used to communicate the data?

The graph highlights all the possible permutations computed for the variable studied. The baseline is based on the ASHRAE 90.1 2007 standard [Appendix G] orienting the building at a true North angle of 45°. The results were shown in a HTML page directly to the design team. The architects used the selectors to filter through the parameters and figured quickly the path to get to their goal.

Most importantly, what did you learn from the investigation?  How did simulation and its outputs influence the design of the project?

I wished I could have added the upfront cost of the design variables to weight in the return on investment and payback period.