Central Utilities Plant upgrade, Building 42C59 Vassar Street, Cambridge, MA
Themes: Renovation and renewal
The upgraded Central Utilities Plant (CUP) helps MIT lower emissions, improve campus resiliency and sustainability, and maintain a more flexible power system for incorporating future innovations.
Themes and priorities
Since 1995, MIT has produced a portion of its own power on campus through a combined heat and power (CHP) process, also known as cogeneration. When the plant’s natural gas turbine reached the end of its useful life, MIT upgraded the plant, replacing the original turbine, adding a second turbine, and installing additional new equipment.
The upgraded Central Utilities Plant (CUP) is designed to conserve energy and lower emissions while also improving the resiliency of the campus. Newer, more efficient equipment and state-of-the-art controls are expected to reduce regulated pollutant emissions by more than 25% from 2014 levels and reduce greenhouse gas emissions by 10% (offsetting a projected 10% increase from 2014 GHG emissions levels due to energy demands created by new buildings and program growth). By 2021, the upgraded plant was running entirely on natural gas, eliminating the use of fuel oil except for emergencies and testing. In most situations when outside power is lost, the new turbines are expected to maintain or restore heat and electricity for the majority of campus, safeguarding residences and protecting vital research.
By upgrading the cogeneration plant, MIT created a flexible power system that positions the Institute to explore emerging sustainability and efficiency measures. Able to adapt and evolve in response to advances in the energy field, the new plant is central to MIT’s commitment to reduce greenhouse gas emissions at least 32% by 2030.
Construction on the plant is completed, and both new turbines are now in service.
- Two new 22-megawatt natural gas turbines and heat recovery steam generators provide electricity, steam, and chilled water to campus
- New turbines can be started even in the absence of external power
- Plant equipment designed and sited to keep key components above the anticipated 500-year flood level
- For campus buildings connected to the CUP, the upgraded plant will be able to meet 100% of electrical needs (up from 60%) during most operating and weather conditions
- Location inside plant for new Eversource regulator station that gives MIT access to high-pressure gas and allows Eversource to enhance their distribution system within the City of Cambridge
Sustainable Design Elements
- High-efficiency cogeneration process that uses one fuel (natural gas) to produce two types of energy (electric and thermal)
- Upgraded plant will run entirely on natural gas except in emergencies and testing situations
- Best Available Control Technology (BACT) incorporated
- State-of-the-art emissions controls including selective catalytic reduction that will reduce NOx (nitrogen oxides) emissions by 90%
- Dedicated continuous emissions monitoring system (CEMS)
- Boilers converted to burn either natural gas or #2 fuel oil, eliminating the use of #6 oil on campus
- Rooftop system will capture rainwater for use in the facility’s cooling towers, easing the burden on the city storm water system; storm water on the perimeter site area will be captured by rain gardens and through groundwater recharge