Engineering for
Building Energy
qualification
Existing Buildings and New Construction
Michael Andelman, P.E.
Andelman and Lelek Engineering, Inc.
Introduction
?
?
Residential and commercialised buildings account for 40% of
energy use in U.S.; 70% of electric use focus will be on
commercial buildings
Initiatives to reduce building energy use
?
Existing Buildings
?
?
?
?
?
Energy Star
LEED EB
ASHRAE 100
service incentive programs
New Buildings
?
?
?
?
?
Energy Star
LEED NC
Federal Programs EPACT
State/ local Codes; Stretch Codes
Corporate / Institutional policies
EXISTING BUILDINGS
ENERGY closing USE
WHERE IS THE ENERGY GOING?
TOTAL ENERGY USAGE (SOURCE MMBtu)
sack Fans
17%
Area Lights
22%
Pumps & Aux.
10%
Heat Rejection
1%
Space
Cooling
8%
Space Heating
14%
Misc Equip
28%
first-class honours degree cadence - Benchmarking
Energy Star Rating System
? ASHRAE Std 100 Energy Efficiency in
Existing Buildings
?
? Uses
CBECS 2003
Campus Benchmarking
CBECS BENCHMARK
Actual EUI (kBtu/sf-yr)
Benchmark EUI (kBtu/sf-yr)
143
143
142
101
78
65
62
48
41
48
65
48
40
60 65
78
65
75 78
78
utility program Data Analysis
Annual Comparison
? Monthly Patterns
? Daily Patterns
?
Monthly utility program Use
Law School- Steam
4,000
3,500
MMBTU
3,000
2005
2006
2,500
2007
2,000
2008
2009
1,500
2010
1,000
2011
2012
500
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Month
Aug
Sep
Oct
Nov
Dec
Daily Electric Use
Screen shot from First Fuel
Submeters
End Use Allocation
Submeters
? Predictors
? Energy Model
?
Lights
15%
Fans
68%
Equipment
4%
Cooling
1%
Heat Rejection
2%
Pumps & Aux.
10%
How to Save Energy
?
scummy Cost/ no cost Energy Conservation
Measures (ECMs)
? Turn
off lights/ equipment during slothful periods
? Change equipment setpoints based on weather/
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