Building Energy Modeling

Class 2

Energy Modeling in Design Work Flow

4 points

1. Computer-based integration of design & production

2. Decreasing linearity of design process, work flow

3. What is needed for energy modeling and when it can occur in the design process

4. Full life-cycle use of building/energy models

Modern Design-Production Process

• Global, computer-based integration of design-production processes

• CAD-CAM in manufacturing

• Building Information Modeling (BIM)

Design Work Flow

• Client - Program

• Architect

• Engineers

• Contractors & Subs

Traditional design process

• Linear and sequential

• Engineering in "design development"

Integrated Design

• Recursive

• Iterative

• Interactive

Integrated Design

Source: earthly ideas.com

Energy Modeling in the design work flow

• Conundrum: energy model needs detailed inputs but less useful once details locked in

• Many key elements - siting, orientation - are fixed in early stage of design

Importance of the schematic design phase

• Formulate dimensions of performance

• Concepts & “Schemes” - compare alternatives

• Adjustments before lock-in

Quantitative Approach – using METRICS

•Dimensions of performance

• Beyond energy, code

•Cost

•Comfort

•Usability

•Resilience

model use over full building life-cycle • BIG DATA

• Interval utility data

• Data from BAS

• Occupant feedback

• “Standards of Care”, on-going services

• Interest from major IT entities – IBM, CISCO etc