High Performing Buildings - Fall 2009 - (Page 44)

energy use The overall building electric and gas energy use for Block 225 is shown in Figure 3. Although a variation exists between years, the use is similar. energY sTAr ratings for Block 225 have been tracked through ePA’s Portfolio manager since 2003. The may 2009 report is shown in Figure 4. The energY sTAr rating of 98 and the energy use intensity (eui) of 43 kBtu/ft2 · yr demonstrate exceptionally low energy consumption and prove that the building is operating efficiently. its energy use is significantly lower than required for an energY sTAr label. The eui has improved by about 15%, most likely because of extensive commissioning conducted since occupancy. e n e r g y at a g l a n c e energy use intensity (site) 43.52 kBtu/ft2 natural gas 6.6 kBtu/ft2 electricity 36.9 kBtu/ft2 renewable energy 0.08 kBtu/ft2 Annual source energy 130.1 kBtu/ft2 Annual energy Cost index (eCi) 1.11 $/ft2 · yr savings vs. standard 90.1–2004 design Building 43% energY sTAr rating 98 figure 3 Building envelOPe ( m o s T lY B A s e d o n m o d e l ) roof Type White roof – single-ply elastomeric polyurethane roofing overall r-value 30 reflectivity Albedo reflectance of 0.5 minimum Walls Type Architectural precast concrete, metal panels, stone, curtainwall figure 4 2009 Baseline (ending date (ending date 03/31/2009) 12/31/2003) 98 97 energY sTAr label 75 overall r-value 12 glazing percentage 30,546 ft2 of 72,773 total ft2 = 42% glass glazing national Average 50 Basement/foundation Type shotcrete and cast-in-place concrete; non-occupied basement Windows u-value gl-1: 0.29 Btu/h winter, 0.3 summer; gl-2: 1.09 Btu/h winter, 1.13 summer solar Heat gain Coefficient (sHgC) 0.23 location latitude 38° 34' 25.10" n (121° 29' 20.89" W) 1,649 4 1,875 4 3,132 8 4,184 10 Performance metrics energY sTAr rating energy use intensity site (kBtu/ft2) source (kBtu/ft2) energy cost $/yr $/ft2 · yr greenhouse gas emissions Carbon dioxide (mt/yr) Carbon dioxide (kg/ft2 · yr ) 43 130 51 144 83 247 110 330 $466,751 $1.11 $408,215 $886,656 $1,184,392 $0.97 $2.11 $2.82 HigH Performing Buildings fa l l 2 0 0 9

Table of Contents for the Digital Edition of High Performing Buildings - Fall 2009

High Performing Buildings - Fall 2009
Contents
Commentary
Kitsap County Administration Building
McDonald's Corporation
Plano Elementary School
California Department of Education
Burns & McDonnell
Advertisers Index

High Performing Buildings - Fall 2009