BCIT NE 01 Energy Upgrade and Retrofit Study

BCIT NE 01 Energy Upgrade and Retrofit Study Result Summary TRANSSOLAR KLIMAENGINEERING

Introduction Transsolar Goals for Study: • Understand the NE 01 building and assess its current state • Analyze the climate situation to drive passive design strategies • Engage students and faculty for feedback and idea generation through a workshop • Investigate potential for comfort improvements in the space and energy reduction • Develop an energy strategy to meet the ambitious Factor Four goals TRANSSOLAR KLIMAENGINEERING

Building Understanding HVAC System • All-air Conditioning System • Centralized Air Handling Units • Air Recirculation • Centralized reheat coils • BCIT district heating supply with back-up local gas boilers TRANSSOLAR KLIMAENGINEERING 3

Building Understanding Lighting TRANSSOLAR KLIMAENGINEERING 4

Creating a Base Case Adjusted Energy Consumption for Comparison Calculated values TRANSSOLAR KLIMAENGINEERING 5

Creating a Base Case Load Type Ventilation Economizer Heating Description Current Case Base Case Air Supply Flow Rate 1266 m 3/hour Ventilation Control 8: 30 am – 9: 30 pm 8: 00 am – 10: 30 pm Mix Set Temperature 13°C N/A Minimum Outdoor Air Supply 2 ACH 100% Outdoor Air Daytime Set Point 21°C Air Temp. 21°C Operative Temp. 15°C Air Temp. 15°C Operative Temperature Nighttime Set Point Temperature * Simulated values *without lighting or plug-loads TRANSSOLAR KLIMAENGINEERING 6

Building Understanding Current Thermal Comfort Level TRANSSOLAR KLIMAENGINEERING 7

Base Case Thermal Comfort Level TRANSSOLAR KLIMAENGINEERING 8

Interventions Intervention Affected Area 1 Operable Windows on Façade 2 Improve Window Quality Façade 3 Exhaust Heat Recovery Whole Building 4 Light Redirection Façade 5 Lighting Controls Whole Building 6 Light bulb Retrofit Whole Building 7 Separate Conditioning from Ventilation Whole Building System 8 Insulation Enhancement Façade 9 Increase Window Area Façade 10 Internal Skylight Shading Cafeteria Atrium 11 Instant Hot Water Heaters Core TRANSSOLAR KLIMAENGINEERING 9

Intervention Evaluation Matrix – Façade Affected Interventions Intervention Energy Savings Cost Comfort Complexity/Effort Recommended Operable Windows on Small Reduction Medium + Low 1 Improve Window Quality Small Reduction Medium + Low 2 Exhaust Heat Recovery Significant Savings Medium 0 High 3 Light Redirection No Savings Low 0/+ Low 5 Lighting Controls Savings Low 0 Low 4 Light bulb Retrofit Savings Low 0/+ Low 4 Separate Conditioning from Significant High + Medium 1 Medium + Medium 2 High + High 5 Façade Ventilation System Insulation Enhancement Increase Window Area on + North Façade TRANSSOLAR KLIMAENGINEERING 10

Recommendations NE 01 Building Upgrade Strategy: 1. Building-Wide Ventilation: Split HVAC with Natural Ventilation 2. Façade Improvements 3. Integration of Heat Recovery in Ventilation System 4. Lighting Upgrades 5. Additional Interventions TRANSSOLAR KLIMAENGINEERING 11

Recommendations 1. Building-Wide Ventilation: Separation and Natural Ventilation • Radiative conditioning system • Dedicated outdoor air ventilation system (driven by air quality not heating) • Natural Ventilation through installation of operable windows along facade TRANSSOLAR KLIMAENGINEERING 12

Night Flushing Effect – Transsolar Office Effect of opening windows TRANSSOLAR KLIMAENGINEERING 13

Recommendations Thermal Comfort Level With Split HVAC and Natural Ventilation (incl. nighttime flushing) TRANSSOLAR KLIMAENGINEERING 14

Recommendations 2. Façade Improvements • Double Glazed Windows with High Quality Frame • Internal Insulation Addition TRANSSOLAR KLIMAENGINEERING 15

Recommendations 3. Integration of Heat Recovery in Ventilation System • Heat Recovery Installation in Central Air Handling Units • Unit-by-Unit Investigation to determine best heat recovery solution TRANSSOLAR KLIMAENGINEERING 16

Recommendations Final Thermal Comfort Level TRANSSOLAR KLIMAENGINEERING 17

Recommendations 4. Lighting Improvements • LED Lighting in common spaces (bathrooms, corridors, etc. ) • Occupation and Daylight controls in common spaces • Vacancy controls in offices and classrooms TRANSSOLAR KLIMAENGINEERING 18

5. Additional Interventions • Natural ventilation and shading in cafeteria atrium space • Replacement of hot water systems for bathrooms with electrical instantaneous hot water heaters TRANSSOLAR KLIMAENGINEERING 19

Recommendations TRANSSOLAR KLIMAENGINEERING 20

Recommendations Energy Reduction Potential TRANSSOLAR KLIMAENGINEERING 21

Thermal Simulation Weather Data Validation TRANSSOLAR KLIMAENGINEERING 22