What is the impact of orientation and WWR on heat gains through envelope?

Fatema Khurshid - June 20, 2024

Medium span (30 seconds)

What is the impact of orientation and WWR on heat gains through envelope?

Project Location: Zone 0A Extremely Hot Humid

Simulation Scale: Shoebox Model

Application: Conceptual

Audience: Architect/Designer

What is this graphic showing? Describe the different parts of the graphic and how it communicates the data.

The graphic indicates data for combination of orientation & WWR(Window-to-wall-ratio) on the total heat gains through the envelope annually for the city of Mumbai (Warm& Humid). The base case is a building oriented North-South (0 degree). The percentage increase in gains relative to the base case is depicted for every 15 degree change in orientation and for 3 cases of WWR (Window-to-wall-ratio).

What type of graphic is this?

  • Animated gif

Design Variables

  • Glazing Fraction/Window to Wall ratio
  • Passive strategies
  • Window shading/sun control

Is this part of the ASHRAE-209 cycle?

What tools were used for the simulation analysis?

  • Design Builder
  • EnergyPlus

What tools did you use to create the graphic?

  • Adobe Photoshop
  • Excel

What was successful and/or unique about the graphic in how it communicates information?

The graphic clearly outlines the total gains, percentage increase in total gains compared to the base case for combination of different orientation and WWR. This would help identify the optimum orientation & WWR combination in context to heat gains through envelope.

Is there anything else you would like to mention?

It can be deduced from the study that the highest heat gains occur at a 90% WWR with a 90degree orientation, while the lowest gains are observed at a 30% WWR with a 0 degree orientation.

Included in the competition: