Opening of Proposals - Olive WTP Solar GESC Proj No 124-050 - Ameresco Inc

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AEREOEnergy Solutions G G r�m For Every Need Baseline Energy Consumption I Methodology Ameresco performed a utility analysis based on utility bills, historical usage data, interval data, site walks, and electrical drawings. Four electric meters were present at the facility. These meters were verified on -site and identified in the electric bills. 611322381 serves Wells 3&6; 611322382 serves Wells 1-2 & Off; 998490925 serves Olive Garages; and 694476004 serves Wells 4&5. It was noted by City staff that the monthly payment file was associated with meter 611322382. The interval data aligned with the monthly data so it was assumed to be for the same meter. The bills also showed that the site is billed on the Water and Sewage Service Tariff 545 for Secondary Service Voltage. The first 300kWh/kW are billed at 8.133 cents/kWh and all remaining kWh/kW are billed at 7.927 cents/kWh. This rate is also subject to a monthly charge of $36.00 and the eight riders, all of which are billed based on per kWh fees. By removing the fixed monthly charge, we can see that the average per kWh cost of energy for this meter is $0.0973/kWh over the last 12 months. Annual Savings I Methodology 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 or eQuest; excel spreadsheet calculations; historical data; etc. HVAC and lighting system savings are usually calculated with spreadsheet calculations where the change can be isolated and the system can be analyzed somewhat independently. The inputs into the calculations are based on existing and proposed equipment information, facility trends, and operating conditions that have been reviewed with the City. Based on the method of calculating and the potential for variation in savings, Ameresco will provide a percentage of the savings that will be guaranteed. The City is likely to see higher savings than the guaranteed amount. To provide a framework for transparently, reliably, and consistently determining savings in a manner that enables independent verification, international Measurement & Verification (M&V) guidelines have been established. Ameresco utilizes both the International Performance Measurement and Verification Protocol (IPMVP) and U.S. Department of Energy - Federal Energy Management Program (FEMP) M&V Guidelines Version 4.0 when defining the M&V methodology. Both IPMVP and FEMP serve as a framework in determining energy savings resulting from the implementation of efficiency measures. Four M&V Options are defined in the guidelines. Due to the nature of solar projects, Option B, a retrofit isolation option, is recommended. Individual M&V plans will be created for any additional measures that are included. Solar PV systems were modeled with Helioscope to determine the solar production during a typical weather year based on system configuration and external factors such as shading or soiling from snow or dust. The modeling indicates an energy production in year 1 of 626,852 kWh for the proposed solar PV array. Ameresco will guarantee 85% of those savings with a 0.5% annual degradation factor. Savings Adjustments I Equipment and Operational Changes During project development, Ameresco spends time working with our customers to assess their needs and understand how their facilities are operating. Through this effort, operational parameters such as occupancy levels, equipment settings, operating hours, etc. can be used to develop an accurate understanding of how energy is consumed in the facility. Some typical situations that can impact the energy savings estimates include renovations/additions to the facility; a new energy load on an existing utility or HVAC service; renovations/modifications of facilities on an existing utility or HVAC service; abandonment of a portion of the facility on an existing utility or HVAC service; and changes in building usage, occupancy hours, calendar, or set points. With a solar array, the adjustments are generally limited to solar insolation and availability conditions. A linear regression will be created between the solar insolation and kWh production of the system. If actual monthly insolation is lower than the expected monthly insolation for the given calendar month, the linear regression formula will be utilized to determine the amount of production lost due to lower insolation conditions. If the site availability falls below 95% due to factors outside of Ameresco's control, including if the City chooses to take the system offline, an adjustment will be made to City of South Bend, IN I Department of Public Works I RFQ Guaranteed Energy Savings Contract