BCIT NE01 Energy Upgrade and Retrofit Study
Result Summary
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Introduction
Transsolar Goals for Study:
•
Understand the NE01 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
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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
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Building Understanding
Lighting
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Creating a Base Case
Adjusted Energy Consumption for Comparison
Calculated
values
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Creating a Base Case
Load Type
Ventilation
Economizer
Heating
Description
Current Case
Base Case
Air Supply Flow Rate
1266 m3/hour
1266 m3/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 Temp.
Temperature
Nighttime Set Point
Temperature
*
Simulated
values
*without lighting or plug-loads
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Building Understanding
Current Thermal Comfort Level
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Base Case Thermal Comfort Level
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Interventions
Intervention
Affected Area
1
Operable Windows on Façade
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
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Intervention Evaluation
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
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Recommendations
NE01 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
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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
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Night Flushing Effect – Transsolar Office
Effect of opening
windows
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Recommendations
Thermal Comfort Level With Split HVAC and Natural Ventilation (incl. nighttime flushing)
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Recommendations
2. Façade Improvements
•
Double Glazed Windows with High Quality Frame
•
Internal Insulation Addition
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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
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Recommendations
Final Thermal Comfort Level
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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
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5. Additional Interventions
•
Natural ventilation and shading in cafeteria atrium space
•
Replacement of hot water systems for bathrooms with electrical instantaneous
hot water heaters
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Recommendations
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Recommendations
Energy Reduction Potential
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Thermal Simulation Weather Data Validation
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