Stanford, CA

Stanford University

Steam to Hot Water Transition

SERVICES PROVIDED
Engineering and Implementation
Client
Stanford University
Start-up
2015
Carbon savings of over 68%. Potable water savings of 15%
Final Project Size in Gross Square Feet
Stanford University Campus has 15,000,000 square feet of building space.
Thermal Capacity
19,500 tons of chilled water capacity, 90,000 ton-hours of chilled water storage, 300 MMBtu of heat generation, and 600 MMBtu of hot water thermal energy storage.

Stanford University’s commitment to reducing its climate impact by reducing greenhouse gases associated with how it produces, distributes, and uses energy on its campus is characterized by the forward thinking leadership documented in the Stanford Energy and Climate Action Plan. A major component of Stanford’s Energy and Climate Action Plan is to re-engineer its approach to thermal energy production in an effort to reduce carbon footprint, maximize energy efficiency, and reduce the use of non-renewable energy resources. This commitment requires the decommissioning and replacement of a utility-scale combined heat and power cogeneration and steam distribution system. As part of a comprehensive plan to reduce fossil fuels and energy consumption, the campus transitioned over 100,000 feet of district heating pipe from steam to hot water. Ever-Green shared thirty years of experience in installing hot water pipe, transferring the benefits of our methods for trenching, installation, leak detection, fiber co-locating, and other best practices.

Ever-Green Energy’s Role: Ever-Green played an early role in the project by providing educational site-visits as well as training sessions in Saint Paul and at Stanford University for Stanford project staff, project engineers, contractors, and the Stanford operations team to learn from our operations, which were once steam-based. Next steps included Ever-Green’s design review of the initial conversion plans and site visits by our engineering and construction team to review their system design, construction plans, and work sites. As the project moved from design and engineering to construction, our team shared thirty years of experience in installing and operating hot water pipe systems, transferring the benefits of our methods for trenching, installation, leak detection, and other best practices. Ever-Green also provided ongoing project support to Stanford, including guidance on best practices for piping system maintenance, building conversions, and thermal storage.

Goals: Stanford is committed to reducing its climate impact by reducing greenhouse gases associated with how it produces, distributes, and uses energy on its campus. The set of projects anticipated under the Stanford Energy Systems Innovations Project will reduce campus greenhouse gas emissions by 50%, save 18% of campus potable water, open up the energy supply platform to future technologies, enable the campus to better manage its power portfolio, and yield utilities savings.

Summary of Transition Success:

  • Conversion of nearly 200 campus buildings from steam to hot water, including district energy heat exchangers at each building.
  • A new central energy facility, the Stanford Energy Center (CEF), that is designed for a peak load of 28,000 tons of cooling and 350 mmbtu / hr heating. The plant utilizes a combination of heat recovery chillers, standard chillers, and gas-fired hot water generators.
  • New hot water piping from the CEF to the buildings, involving over 20 miles of piping. Domestic and industrial hot and cold water will be provided.
  • Interface with a ground source heat exchange system to enhance the operation of the heat recovery chiller. Heat absorbed by air-conditioning and other cooling systems on campus will be transferred to the chilled water system and then subsequently rejected from the system into the earth.

Technologies Implemented: Steam to hot water conversion, district heating, combined heating and cooling, water conservation and recovery, hot and chilled water thermal storage,

Work with Ever-Green

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