Client: St. Stephen’s College, University of Alberta
Consultant: Applied Energy Consulting
Overview
Applied Energy Consulting (AEC) conducted a comprehensive Building Condition Assessment (BCA), ASHRAE Level III Energy Audit, and energy modeling for St. Stephen’s College. The study aimed to evaluate the building’s current condition, assess energy consumption, and provide actionable recommendations for reducing energy use, enhancing occupant comfort, and achieving sustainability goals.
Building Condition Assessment (BCA)
- Windows & Envelope: The existing windows are single-glazed and have damaged frames. It was recommended that windows be upgraded to high-performance double or triple-glazed units.
- Heating & Cooling: The building currently lacks a central cooling system, and existing HVAC systems are outdated. A redesign of the HVAC system was proposed, including heat recovery, improved ventilation, and the installation of a central building management system.
- Lighting: Lighting systems were outdated, with a mix of T8, T12, and CFL fixtures. A comprehensive lighting retrofit to LED standards was recommended.
- Water Systems: Plumbing and DHW systems require upgrades, including low-flow aerators, automatic flow sensors, and the replacement of water closet valves with infrared low-flow systems.
ASHRAE Level III Energy Audit & Energy Modeling
- Energy Savings: Significant energy savings of up to 78% can be achieved through deep retrofits, including envelope upgrades, HVAC system redesign, and lighting improvements.
- GHG Reduction: Retrofit scenarios also show a 90% reduction in greenhouse gas emissions.
- Energy Consumption: The building’s current energy intensity (EUI) is above the typical range for similar facilities, indicating room for improvement.
- Proposed Measures: Key energy conservation measures (ECMs) include:
- Window upgrades to high-performance glazing.
- Increased insulation in the roof and walls.
- Energy-efficient lighting and HVAC system upgrades.
- Implementation of a demand-control ventilation system based on CO2 levels.
- Installation of an on-site photovoltaic system.
Impact
The comprehensive assessment, audit, and modeling for St. Stephen’s College provided a clear roadmap for improving energy efficiency, reducing operational costs, and enhancing sustainability. The proposed retrofits align with industry standards and position the College for long-term savings and environmental impact reduction.
