Laserfiche WebLink
City of South Bend, IN – Department of Public Works <br />RFQ Response: Guaranteed Energy Savings Contract <br /> Page | 14 <br />OPTION B <br />Option B applies to Photovoltaic installations (Solar). <br />Verification techniques are designed for projects where long-term continuous measurement of <br />performance is desired. Metering is conducted on an individual system level, and the measured <br />performance is compared with a baseline to determine the savings. <br /> <br />OPTION C <br />Verification techniques involve utility whole building meter analysis, reviewing overall energy <br />use, and identifying the effects of energy projects on a facility. Energy use before and after a <br />retrofit project is compared to determine savings. The measurement of energy consumption and <br />the cost savings associated with installed energy management equipment are a comparison <br />between the energy consumed during the current calendar period and the baseline calendar <br />period. It consists of only the energy bills applicable to the buildings under energy management. <br />Once the program is in place, energy use is taken from current utility bills. <br /> <br />OPTION D <br />Computer models are developed that use simulations of baseline and post-installation energy <br />use to determine savings. <br /> <br />For this project we would recommend using both Options A and B. For all operational savings <br />measures we would utilize Option A due to the complicated nature of trying to meter this <br />equipment. As for the solar arrays we would measure the output on an ongoing basis (Option <br />B), which requires minimal metering equipment. The cost of this ongoing measurement and <br />verification is bundled in our extended warranty/maintenance program. This is a completely <br />optional program that can be discontinued at the City’s discretion. In this way, City of South Bend <br />can be certain that the guarantee is met, and the project is not burdened by ongoing <br />measurement & verification if they so choose. Our proposal would also assume non-utility <br />savings incurred by reduced maintenance and down-time of HVAC equipment. <br /> <br />MEASUREMENT AND VERIFICATION PLAN AND ANNUAL SAVINGS REPORT <br />The two primary responsibilities of the Measurement & Verification department at Veregy are to <br />ensure that the solar assets are performing as expected and to track savings for the customer. <br />From the performance perspective, solar production and insolation data is compiled every week <br />and benchmarked against our expected production value for the current month in the typical <br />meteorological year (TMY). During the design process, TMY3 data is used to simulate expected <br />monthly solar production. As a result, we know how much energy the system could produce <br />given a certain magnitude of global horizontal insolation (GHI). By compiling the actual GHI data <br />for a site, we are able to implement a performance ratio to calculate the expected solar <br />production for that site, and thereby determine if the system is performing as expected. From <br />the savings perspective, revenue grade meters and communication systems are used to pull <br />production data either on-site or through the internet. The production data is compiled, tracked, <br />and benchmarked to ensure that we are fulfilling our obligations to the customer. At the end of <br />each guarantee year, the customer will be given a yearly production and savings report by <br />Veregy, as well as a yearly “Guaranteed Energy Savings Contract Annual Savings Report” <br />detailing environmental and dollar savings that is to be filed with the Indiana Department of Local <br />Government Finance.