Opening of Proposals - WWTP Solar Guaranteed Energy Savings Contract Proj. No. 124-015 - Ameresco

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14 Energy Solutions For Every Need City of South Bend, IN RFQ Guaranteed Energy Savings Contract Department of Public Works Savings Guarantee | Successful Creation and Delivery Our regional team has completed hundreds of energy solutions projects, the majority of which guarantee savings. These projects range from single building school districts to comprehensive solutions over a large portfolio of buildings. Ameresco uses a robust measurement and verification approach based on the IPMVP and FEMP M&V Guidelines to substantiate the project’s performance in achieving expected energy cost savings. Due to the variables and dynamics that are unique to each performance contract, an individual M&V plan will be developed for each measure. The M&V process starts during the development of the project to take baseline measurements and ensure that expected savings are achievable. During the construction process, M&V processes verify that everything is installed consistent with the expectations and savings calculations. Then M&V monitors the project performance over the long term to ensure the long-term achievement of savings. Four M&V options are available and are used for specific situations. Oftentimes, more than one option is possible, and multiple options may be used on a single project. The general approach to determining energy savings in these four options involves comparing the energy use associated with a certain energy consuming system within a facility, or the energy use of an entire facility, before installation of the ECM (baseline) and after installation of the ECM (post- installation). Determining energy savings for only a certain energy consuming system within a facility is accomplished with the retrofit-isolation methods. These methods allow for an accurate assessment of only the energy consumption associated with a defined measure. Option A – Key Parameter Measurement and Option B – All Parameter Measurement are retrofit isolation-methods. Determining energy savings for an entire facility is accomplished with the whole-facility methods. These methods are generally utilized when projects contain a measure, or measures, that will fundamentally change the way an entire facility uses energy. Option C – Whole Facility Meter Analysis is a whole-facility method. Option D – Calibrated Simulation is most often applied as a whole-facility method but can also be applied as a retrofit-isolation method in certain cases. Factors that guide the selection of an M&V method for an individual ECM include: cost of measurement versus the savings being measured, likelihood of sustainable savings from the ECM, likelihood of future construction or renovation work, complexity of ECMs, level of interaction between ECMs, and amount of sub-metering within the facility. Regardless of the final M&V option(s) that are selected, energy savings will be calculated based on the following formula: Energy Savings = Baseline Energy Consumption – Post Retrofit Energy Consumption ± Adjustments Ameresco uses a variety of tools and data sources to measure the savings for various ECMs. In combination with using the utility data, Ameresco may utilize other data gathering techniques if needed to validate proper equipment operation. This may include spot measurements using True RMS meters, or submeters on specific sections of the building or specific pieces of equipment to confirm usage of certain systems. Using component level data analysis along with the utility data to validate savings provides assurance to the City that the project is performing as expected and the savings will be achieved over the life of the project. Savings Calculations Savings are calculated in a variety of ways depending on the nature of the ECM, the available data, and the customer’s goals. This includes the use of modeling software such as Helioscope, PVSyst, or eQuest; excel spreadsheet 8 | Financial Guarantees