This publication was superseded in January 2022 by TM54 Evaluating operational energy performance at the design stage, and should not be used on current projects.
Table of contents
- Why estimate energy use?
- Current situation
- Evaluating energy use
- Risks of evaluating energy use at the design stage
- Principles of evaluating energy use
- Principles of CIBSE TM22
- Using dynamic simulation models
- Assumptions and simplifications in models
- Using benchmarks at early design stages
- The methodology
- Step 1: Establishing floor areas
- Step 2: Estimating operating hours and occupancy factors
- Step 3: Evaluating lighting energy use
- Step 4: Evaluating energy use for lifts and escalators
- Step 5: Evaluating energy use for small power
- Step 6: Evaluating energy use for catering
- Step 7: Evaluating energy use for server rooms
- Step 8: Evaluating energy use of other equipment
- Step 9: Evaluating energy use of domestic hot water
- Step 10: Evaluating internal heat gains
- Step 11: Evaluating energy use for space heating,cooling, fans and pumps
- Step 12: Evaluating energy use for humidification and dehumidification
- Step 13: Estimating management factors
- Step 14: Running scenarios
- Step 15: Sensitivity analysis
- Step 16: Review against benchmarks
- Step 17: Presenting the results
- Post occupation
Principal authors: David Cheshire (AECOM); Anna Carolina Menezes (AECOM)
Contributors: Mark Bacon (AECOM); Andrew Cripps (AECOM); Xavier Fulbright (AECOM); Brian Graham (AECOM); Anna Holding (AECOM); Martin McLaughlin (AECOM); Ant Wilson (AECOM)
Task Group: David Hughes (Chair); Dave Cheshire (AECOM); Andrew Cripps (AECOM); Hywel Davies (CIBSE); John Field (TEAM (EAA Ltd.)); Phil Jones (Building Energy Solutions); Anna Carolina Menezes (AECOM); Philip Oliver (Kyoob Ltd.); Ian Pegg (Johnson Controls); Mike Smith (BSRIA); John Ward (SES)
Peer Reviewers: Eszter Gulacsy (Mott MacDonald); David Kingstone (Buro Happold); Brian Spires