Energy Project Financing : Resources and Strategies for Success

(singke) #1

Appendix B 359


— only half of the anticipated growth from 1,450 hrs to 2,000 hrs
may happen, and

— the 9% load fraction may be switched on for 400 hours.


  • These possible errors could affect the post-retrofit energy use by
    as much as about 2,500 kWh, which represents 8.2% of the ex-
    pected 30,000 kWh annual savings. The impact of assumptions of
    the lighting impact on the electrical demand meter for all twelve
    months of the baseyear and post-retrofit years might affect total
    reported demand savings by as much as 3%. Neither of these
    stipulation impacts is considered significant for the project.

  • Estimated accuracy of the power measurements is ±4%.

  • The savings calculation process shown below was summarized in
    the M&V Plan.

  • Savings are to be computed annually for the subsequent year using
    a remeasurement of the lighting electrical load immediately after
    ECM completion and on each anniversary thereafter.

  • The electrical power readings on the baseyear and all future years
    will be made by a contract electrician. All data and analyses are
    available for inspection. As a check on the readings, building main-
    tenance staff will also measure the electrical load at the same times
    as the contractor. If there is a difference of more than 4% between
    staff and contractor readings, a second contractor reading will be
    made and the proper value selected between the two contractor
    readings.

  • This savings determination process is expected to require an elec-
    trician 5 hours each year to make the readings and calibrate the
    measurement equipment. Total cost each year is expected to be
    $200 including reporting,


Baseyear Electricity Use/Demand
The baseyear energy use for Equation 1 is computed by multiply-
ing the 28.8 baseyear load by baseyear load/duration data, above. The
computation is shown below.

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