Applying the Energy Code

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Mary Holmes
5 years ago
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2 Agenda Introduction to Performance Cost Index Case Study: Utility Administration Building

3 Learning Objectives Recognize new terminology Performance Rating Method Understand sensitivity Apply in other code cycles and LEED

4 What s new in New Climate Zone 0A and 0B Reassigned climate zones Infiltration verification 5B: Opaque doors, fenestration Lighting power and controls Chilled water plant metering DOAS requirements Elevator efficiency Economizer/DX fault detection and diagnostics

5 Colorado Weather Zones 5B => 4B o Bent o Prowers 6B => 5B o Custer

6 Code Compliance Prescriptive Path Energy Cost Budget Method o Building Clone Performance Rating Method (Appendix G) o Orientation o Optimized window area o Thermal mass o HVAC system, rightsizing, efficiency

7 Performance Cost Index Performance Cost Index (PCI) = Proposed < Performance Cost Index Target (PCIt) Baseline PCIt = Baseline Unregulated + (Baseline Performance Factor x Baseline Regulated) Baseline PCIt = BBUEC + (BPFxBBREC) BBP = BBUEC + (BPFxBBREC) BBP BBP

8 Building Performance Factor Multifamily 0.80 Healthcare / Hospital Hotel / Motel Climate Zone 5B Office 0.61 Restaurant 0.58 Retail 0.59 School 0.50 Warehouse 0.61 All Others

9 Baseline Building vs Similar Envelope Lighting W/sf Lighting control Receptacle control HVAC efficiency

10 Baseline Building vs Similar Envelope Lighting W/sf Lighting control Receptacle control HVAC efficiency Different Window to wall ratio Infiltration Occupancy sensor Pump power Service water heating Elevator, refrigeration Room setpoints Ventilation

11 Performance Cost Index Performance Cost Index (PCI) = Proposed < Performance Cost Index Target (PCIt) Baseline PCIt = Baseline Unregulated + (Baseline Performance Factor x Baseline Regulated) Baseline PCIt = BBUEC + (BPFxBBREC) BBP = BBUEC + (BPFxBBREC) BBP BBP

12 PCIt Sensitivity Performance Cost Index Target (PCIt) % 20% 40% 60% 80% 100% CZ 5B Office (BPF = 0.61) Baseline Building Unregulated Energy Cost Fraction

13 Required Total Energy Cost Savings Sensitivity Required Cost Savings 40% 30% 20% 10% 0% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% CZ 5B Office (BPF = 0.61) Baseline Building Unregulated Energy Cost Fraction

14 Case Study: Utility Administration Building

15 Case Study: Utility Administration Building No renewable energy PCIt = BBUEC + (BPFxBBREC) BBP PCIt = $5,071 + (0.61 x $43,474) = 0.65 $48,545 PCI = $30,100 = 0.62 PASS $48,545

16 Case Study: Utility Administration Building Unregulated Fraction PCIt PCI UAB With Fort Collins Electric Rate 10.4% PASS Blended Electric Rate 12.3% PASS 50% of Unregulated Load 150% of Unregulated Load 200% of Unregulated Load 33% Renewable Energy 66% Renewable Energy

17 Case Study: Utility Administration Building Unregulated Fraction PCIt PCI UAB With Fort Collins Electric Rate 10.4% PASS Blended Electric Rate 12.3% PASS 50% of Unregulated Load 6.5% PASS 150% of Unregulated Load 17.2% PASS 200% of Unregulated Load 21.2% PASS 33% Renewable Energy 66% Renewable Energy

18 Case Study: Utility Administration Building Unregulated Fraction PCIt PCI UAB With Fort Collins Electric Rate 10.4% PASS Blended Electric Rate 12.3% PASS 50% of Unregulated Load 6.5% PASS 150% of Unregulated Load 17.2% PASS 200% of Unregulated Load 21.2% PASS 33% Renewable Energy 12.3% PASS 66% Renewable Energy 12.3% PASS

19 Building Performance Factor Climate Zone 5B Multifamily Healthcare / Hospital Hotel / Motel Office Restaurant Retail School Warehouse All Others Climate Zone 5B for LEEDv4