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Sample Minimum Requirements Document for CHP Projects

In document Combined Heat and Power (CHP) (Page 32-36)

Customer Name

Insert Customer name- XYZ Corp.

EI or D2

Choose one Location Insert Customer Address

Application#: Inset App. No.

ECM Briefly describe the size and technology of the CHP project e.g. 500 kW CHP using gas fired reciprocating Engine

This document specifies the agreed upon minimum equipment specifications and operational requirements of the proposed system. These requirements shall address the criteria necessary to be met to achieve the demand and energy savings estimated in the engineering analysis for this project. (Use additional sheets if necessary).

Circle yes or no Pre Construction

SEQUENCE OF OPERATION: Provide a description of equipment operating sequences, setpoints, operating schedules, balancing requirements (flow, velocity, head, etc) or any other required operating parameters

Submittals: Provide major equipment data sheets

Milestone 1. Equipment submittal and approval of Sequence of Operation (SOO).

Required Completion Date: Before the start of the CHP installation at the site and prior to releasing the production of the major equipment.

Describe the sequence of operation reflecting the assumptions made in the energy saving calculations and ask for the pertinent documents. Provide submittals to confirm that the equipment ordered meet the requirements and assumptions used in the TA study.

Example:

1. Sequence of Operation (SOO): The CHP plant shall operate continuously, except for maintenance periods and will be base loaded at 100%. Except for non-routine outages, facility electrical demand is such that all of the electrical output from the CHP plant will be fully utilized. The thermal demand varies seasonally, although there is significant process related thermal demand even during warm weather months. The CHP plant heat

recovery system will operate so as to maximize the utilization of recovered heat by taking priority over the existing boilers. The existing boiler plant(s) will provide additional hot water capacity only when CHP thermal output is not able to satisfy the facility thermal demands. The excess unutilized heat from CHP plant will be routed to a radiator.

Beneficial use of CHP thermal capacity based on the existing plant natural gas consumption is estimated at approximately 75%.

2. Provide detailed written description of the above proposed Sequence of Operations (SOO) of the CHP and all affected systems. (This must include how the system will be first-in-line to serve hot water loads and how the system will track thermal load).

3. Prior to releasing the CHP equipment for production, customer shall provide a copy of the equipment submittals including performance ratings for review of general compliance with this MRD and the assumptions used in savings calculation and technical study.

4. Process and Instrument Diagram showing all CHP plant equipment; fuel, gas, hot water, chilled water piping; Btu/kW/kWh meters, and instruments.

5. CHP Plant is designed to meet the following performance criteria.

Annual production of A) z,zzz,zzz kWh, B) xxxxxx ton-hrs of chilled water, C) yyyyyy Therms of heat recovery as hot water (as calculated in the technical study,) D) Electrical Efficiency = XX%, E) Thermal Efficiency = x%, F) Annual plant Efficiency shall exceed XX%

Post Inspection Installation Completion: Provide a list of equipment or materials installed as part of this project.

Include mfr, model, HP, kW, efficiency ratings, etc .and confirm completion

Milestone 2a. Installation Completion

List all the equipment related to the CHP plant and describe their capacity and performance specifications as required to establish that the plant is installed as per design.

Example:

1. Install one natural gas fired lean burn internal combustion engine with generator and controls, and auxiliary equipment sized for approximately XXX kW of gross output.

Concept design is based on a Jenbacher JMC 420 unit, but a different and similar sized unit ultimately could be selected based on the competitive bid process. The CHP plant shall have a minimum overall design efficiency of 70% (based on peak load and higher heating value). Heat captured from the engine block as well as the exhaust shall be used for the generation of 180 to 200 F hot water, which will interface with the facilities’ existing hot water supply (HWS) loops located in the sludge process and secondary influent buildings. All pumps, control valves and controls shall be provided as required to operate the units in automatic mode requiring minimal operator intervention. The CHP package shall meet applicable State and Federal codes including emissions, environmental and noise regulations and shall comply with National Grid interconnection requirements. See attachment 1 for details

2. Install an exhaust gas heat exchangers for production of 190 to 200 F hot water. Heat exchangers shall be designed within engine manufacturer’s specifications for exhaust back pressure. CHP system shall be capable of diverting unutilized heat to a remote dump radiator for dissipation to the ambient when required.

Provide meters as required and as outlined in Milestone 1 related documents to monitor thermal energy output, waster heat utilization and electrical power production. Electric and gas meters shall have accuracy equal to utility grade meters. Thermal energy monitoring accuracy shall meet Massachusetts Alternative Portfolio Standard (APS) requirements. As a minimum, the system shall be able to capture hourly interval data for electricity produced, waste heat utilization, fuel input and power consumed by all auxiliary equipment such as gas compressors, feed water pumps, etc. supporting the CHP plant.

Hourly trends for gas input and engine run hours shall be provided. The control system should be capable of trending and archiving this data for a period of one year before overwriting. Archived data shall be capable of being exported to Excel (or Excel-compatible) electronic files. In addition to the above requirements, the CHP plant will meet all the requirements of Section III.2.C and Appendix C of the Massachusetts APS Statement of qualification Application Form dated October 5, 2009 (or most recent version). During post-inspection confirm that data collection system is installed, connected to properly calibrated metering and report and archiving data properly.

Milestone 2b. Demonstration of Operability

(Completion of Milestone 2A and 2b is required for the payment of 80% of the incentive)

Confirm that the above noted equipment is installed and operational for completing Milestone 2b.

Installed and operational is defined as :

o All components of the CHP system are installed

o All equipment, piping (including flushing), electrical and control wiring is completed, so that equipment can run in an automatic mode.

Interconnection to customer’s electrical and thermal load is operational.

Interconnection facilities are completed and accepted by Retail Connections Engineering and insurance certificates are in place. This does not absolve the customer from meeting any other jurisdictional permits or other regulatory requirements.

o All instrumentation and meters required are installed, and are properly working

o The CHP Unit is capable of operating continuously in automatic mode o Hourly interval data shall be made available to PA (in Excel or CSV format) o Customer has completed its own substantial commissioning of the CHP system Post Operational

Assessment

DOCUMENTATION: List written documentation required to train, verify, operate, or maintain the equipment being installed or controlled. This may include specification sheets, test reports, construction drawings, etc.: Provide a list of Trending Requirements required to verify proper system operation. Trends should document operational sequences, setpoints and scheduling of equipment as described in TA Study

Milestone 3. Remaining 20% of the incentive will be paid only after Milestone 3 & 4 are completed satisfactorily

Validate the following items:

(a) O&M manuals and documentation are on site Example:

1. All equipment catalogs and performance specifications. O&M manuals for the following equipment

a. Engine/Generator Set b. Pump(s)

c. Electric Motor(s) d. Heat Exchanger(s)

e. Metering Equipment (gas, electric, hot water)

2. Design Drawings (Process and & Instrument Diagrams and Mechanical Piping Drawings, Instrumentation List and equipment Data Sheets are available on site

(b) Availability of trend data and confirmation of its exportability Example:

1. Provide 1 hour interval data for the following points as a minimum (15 minute interval data is desirable). Provide the capacity for and enable trend data archiving for a period of at least one year.

2. Provide ability to export weekly data electronically to third party via email or FTP at all times

a. Gross and net kW and kWh electrical output b. Fuel input to CHP plant (therms or mmBtu)

c. Hot water generated and utilized by CHP plant (therms or mmBtu) i. Flow/temp on supply/return

ii. Any point necessary to determine other parasitic loads, based on the final plant design.

3. Post operational assessment process will require functional testing of the CHP and the thermal and electrical interface to the buildings, a minimum 2 weeks and up to 6 months of concurrent 1 hour interval data for all points noted above. If equipment fails to meet expected sequences of operations and corrections are needed, an additional trend data shall be provided to confirm any seasonal changes in operations.

4. Provide meter calibration data.

(c) Sequence of operation is working as outlined in the MRD, TA report and supporting energy savings calculations

Example: The full commissioning report is received and the remotely available

performance data is reviewed by National Grid and the plant is operating in compliance with the proposed plant performance criteria specified in the MRD.

Post Inspection OTHER REQUIRMENTS: Describe any requirements for demolition, removal, etc of existing equipment.

Milestone 4

1. XYZ Corp. will have a minimum 3 year maintenance contract to help achieve long term proposed operational strategies and energy cost savings. Normal planned /routine maintenance shall be conducted where possible during National Grid off-peak billing periods.

2. Provide detailed project cost breakdown by major system components. Provide copies of paid invoices to support the project costs.

The pre-approved incentive is subject to Retail Companies' POST INSPECTION of final specifications, drawings and operation of the proposed equipment. In the event the proposed system is altered from the above description, notify the Company of the change prior to the equipment purchase and installation as the change in design and operation may impact the available incentive.

In document Combined Heat and Power (CHP) (Page 32-36)

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