ELECTRIFICATION FEASIBILITY STUDY WITH THE MBTA
EVERETT, MA
OPPORTUNITY
An MBTA Bus Maintenance Facility, spanning three buildings totaling approximately 290,000 ft², is heated by an aging fossil fuel-fired steam system. Recognizing the opportunity to align with long-term decarbonization goals, the MBTA sought to upgrade their heating system. B2Q Associates conducted a focused study on practical electrification and heat pump technologies, aiming to substantially reduce carbon emissions while providing reliable heating and ventilation.
CHALLENGE
The study uncovered several hurdles to achieving 100% decarbonization. Challenges included site electrical constraints requiring expensive upgrades, complexities tied to critical processes, and electrifying high volume outside air systems and specialized paint spray booth units, while also considering osteffectiveness. A crucial life cycle cost analysis was imperative for selecting an economically viable replacement, ensuring environmental sustainability and financial prudence.
RESULTS
The study produced notable results, showcasing an innovative approach to achieving an 80% reduction in fossil fuel use and carbon emissions within existing site constraints. This solution not only demonstrates significant progress but also lays the groundwork for future decarbonization efforts. Challenges, such as existing infrastructure limitations and high-volume ventilation loads in paint spray booths and vehicle maintenance areas, were addressed through strategic planning and technology integration. The retrofit option for a new heat pump-based HVAC system, which combined air-source and water-source technologies, maximized the utilization of existing electrical capacity, resulting in substantial carbon savings and effective cost management. The study’s metering provided essential data for informed decision making at the building level, underscoring the importance of comprehensive monitoring and analysis in sustainability initiatives. Notably, significant energy savings were attributed to the absence of an existing building automation system (BAS), prompting a recommended upgrade to ensure optimal control and efficiency across both new and existing equipment.
Market:
Public Sector
Services:
Energy Efficiency & Analysis
Electrification
Feasibility Study
