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Energy Retrofit Guidelines
Leland Stanford Junior University
Table of contents
Introduction
The Energy Retrofit Program (ERP) has been established to reduce the overall energy costs on the Stanford University campus by improving building level energy efficiency. Funds are set aside each year to implement the most cost effective retrofit projects. Projects are ranked and funded on a simple payback basis and must have a better than five year payback. A typical energy retrofit project will not only improve energy efficiency and reduce building energy costs but also reduce utility demand, improve occupant comfort, and decrease maintenance costs.
Funding for the Energy Retrofit Program comes from the electricity, steam, and chilled water utility recharge rates. Energy cost savings can only be based on the Stanford supplied utilities.
Energy retrofit projects will be funded twice per year. Requests for the first round of funding must be received by September 30. Requests for the second round of funding must be received by January 15. Two funding rounds will allow the project managers to have more flexibility when scheduling project work including taking advantage of the winter break shutdown period. Additionally, end-of-the-fiscal-year project rush can be reduced and energy savings can accrue sooner.
To be successful, the ERP must blend the abilities of many different groups within the Facilities Department. In general, the projects are identified and implemented by the groups who work most closely with the building occupants -- the Zone Management Division Teams or their auxiliary equivalents. The Craft shops are encouraged to bid on the retrofit projects, not only reducing the real cost of the project to Stanford, but also improving troubleshooting service. The Energy Management Group is responsible for providing consistency in the approval and implementation of projects, ensuring a representative distribution of ERP funds to the zones and auxiliaries, providing technical guidance, and evaluating new technologies and strategies for future implementation. In addition, the Energy Management Group continually monitors both the effectiveness of the individual projects as well as the effectiveness of the entire program by analyzing the metered consumption and demand before and after each retrofit project. How a retrofit project is initiated, approved, funded, and implemented is described in the following sections.
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ERP Checklist
The following table outlines the ERP process. Please use it as a guide when submitting requests for ERP funding.
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TASK |
RESPONSIBLE |
DUE DATE |
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Identify Project with potential energy savings |
Project Manager |
Before September 30
Before January 20 |
|
Calculate Energy Savings |
Project Manager |
Before September 30
Before January 20 |
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Estimate Project Cost |
Project Manager |
Before September 30
Before January 20 |
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Send Request for funding to ERP |
Project Manager |
Before September 30
Before January 20 |
|
Review Request |
ERP Staff |
October 15
January 30 |
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Send Commitment Letter |
ERP Staff |
October 15
January 30 |
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Prepare Funds Release Form/Authorizations |
Project Manager/Plant Accounting |
Before June 1 |
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Obtain Competitive Bid |
Project Manager/Procurement |
Before June 1 |
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Project Construction |
Project Manager |
Before June 1 |
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Project Inspection |
Project Manager/ERP |
Before July 1 |
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Transfer of Funds |
ERP/Plant Accounting |
Before July 1 |
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I) Identify Project with Potential Energy Savings
Project managers should be on the look out for energy retrofit projects in their buildings. The Electric shop, the Relamp shop, the HVAC shop, and building occupants should be consulted for additional project ideas.
II) Calculate Energy Savings
Useful reference sources include, ASHRAE, IES, Manufacturers' data, EPRI technical information, etc. Please contact the Energy Management group for additional sources. An example lighting calculation is attached in Appendix A.
A student intern or graduate research assistant may be available to assist the project manager with the various phases of a retrofit project. This activity shall be coordinated through the Energy Retrofit Program Manager. Other members of the Energy Management Group (EMG) may be consulted when appropriate and as schedules allow. The EMG maintains a small library of reference materials and catalogs that may be helpful when preparing a funding request.
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III) Estimate Project Cost
Project managers are encouraged to seek assistance from the craft shops and outside contractors when preparing cost estimates. Budget overruns or changes in project scope are not guaranteed to be funded.
IV) Send Request for Funding to ERP
Requests for Energy Retrofit funding will be initiated by the project manager and follow the schedule described in the checklist (Table 1). A funding request will not be considered complete unless is contains the following:
System Survey
- A concise description of the Energy system to be changed.
- The location of all the equipment to be retrofitted including supplemental sketches, drawings, bible sheets, etc. as necessary.
- The hours of operation of the system(s). For example, within a single building, labs, classrooms, offices, and common areas may all have different hours of operation for lighting and equipment. Similarly, different HVAC fan systems within a building have different schedules. Estimates from outside sources have proven to be inaccurate.
- The rating of all the relevant equipment -- include all relevant nameplate data, wattage, tonnage, voltage, horsepower, etc.
- The condition and age of existing equipment.
- Calculations of existing energy use. Be specific and cite references if used.
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Proposed System Modification
- A concise description of the proposed change to the energy system.
- An explanation of how the proposed change reduces energy consumption and cost.
- Changes in the hours of operation.
- Square footage of the affected area.
- Number of units to be installed (motors, pumps, light fixtures, etc.).
- Rating of the new equipment.
- Calculation of new energy use. Include calculated reduced peak electrical demand if any.
V) Review Request
Each project will be evaluated for its potential energy savings. Projects with the shortest simple payback will be given funding preference. If a project has a simple payback beyond five years it will not be considered for funding. Additionally, projects will not be considered if they include unproved technologies or will adversely affect building occupants. Projects that solely involve the replacement of damaged or worn out equipment are best funded through the Deferred Maintenance Program.
Energy Retrofit Program staff will prioritize all submitted projects based on the above criteria to ensure equity in the distribution of the annual program funds.
The Energy Retrofit team will evaluate and approve funding requests based on the schedule in the checklist (Table 1.).
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VI) Send Commitment Letter
After receiving a completed retrofit package, projects are assigned an ERP number. If a project is determined to be viable, a not-to-exceed reimbursement amount will be committed in writing to the project manager. An example of this commitment can be found in appendix B.
VII) Prepare Funds Release Form and Project Authorization
Academic Areas (Zone Teams) and School of Medicine
Once the commitment letter has been received by the project manager, a plant account may be set up with the Controller's office using the fund release form (appendix C). The Controller's office will be advised which projects have been approved for funding by the ERP. Funds may then be transferred as part of the creation of the plant account. Use the ERP number assigned to the project when setting up the account. If a plant account is not used, the ERP will transfer funding upon successful completion of the retrofit project. Please note, the energy retrofit program cannot reimburse capital project accounts. Please contact the Energy Management Group if you need a more detailed explanation.
Auxiliaries, DAPER, Housing and Dining Services
Once the commitment letter has been received proceed with your project. The ERP will transfer funding upon successful completion of the retrofit project.
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VIII) Obtain Competitive Bid
Once a project is approved for Energy Retrofit funding, the project manager should submit the bid and specification documents to the ERP manager. Specifications must conform to Stanford's Facility Design Standards. The ERP Manager will contact the project manager if the scope of the work does not represent the proposed system modifications submitted in the funding request.
IX) Project Construction
All phases of project implementation are the responsibility of the project manager. It is also the responsibility of the project manager to make sure that the project construction adheres to university health and safety standards and practices. The project manager should pay particular attention to the rules and regulations regarding confined space access, ACM issues, proper disposal of PCB ballasts, and the proper disposal of fluorescent (or any other mercury containing) lamps.
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X) Project Inspection
A post construction walk-through shall be conducted by the project manager and shall include the contractor, an ERP representative, and the appropriate shop personnel. This team shall review project completion for design compliance and the completeness prior to closing the project.
XI) Transfer of Retrofit Funds
For an energy retrofit project to receive funding, the project must have been approved in advance by the ERP manager. A commitment letter from the ERP manager indicates approval and funding amount.
A retrofit project will be considered complete after the following criteria have been met:
1.The project installation is complete and the final project invoices have been received.
2.The project has been inspected by the ERP staff.
3.Paperwork documenting all project expenses including copies of work orders, material and or labor invoices, or requisitions have been received by the ERP staff.
4.A brief electronic-mail or memorandum describing the actual start and completion dates for the project and any changes made during construction that could affect the amount of energy saved by the project. (for example, more fixtures are retrofitted than estimated).
It is the responsibility of the project manager to make sure that all steps listed above are followed. New funds will not be committed to zones or auxiliaries that have incomplete paperwork from previous projects.
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Project Cost Over/Under Budget Estimate
If the actual project costs are less than the approved amount all remaining funds shall be returned to the ERP account. As stated earlier, the ERP is not responsible for funding cost overruns or changes in the scope of the project. However, if additional opportunities for energy savings are identified after a project has been approved, increased funding will be considered if sufficient uncommitted funds are available and the additional work or change in scope follows the normal ERP requirements.
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