Agenda - 06-07-2011 - 9a - Laserfiche WebLink

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26 Appendix A - Definition of Terms • Energy demands, directly compared to "reference" energy demands generated by means of simulation tools. Walk-through or preliminary audit: The preliminary audit (altematively called a simple audit, screening audit orwalk-through audit) is the simplest and quickest type of audit. It involves minimal interviews with site-operating personnel, a brief review of facility utility bills and other operating data, and awalk-through of the facility to become familiar with the building operation and to identify any glaring areas of energy waste or inefficiency. Typically, only major problem areas will be covered during this type of audit. Corrective measures are briefly described, and quick estimates of implementation cost, potential operating cost savings, and simple payback periods are provided. A list of energy conservation measures (ECMs, or energy conservation opportunities, ECOs) requiring further consideration is also provided. This level of detail, while not sufficient for reaching a final decision on implementing proposed measure, is adequate to prioritize energy-efficiency projects and to determine the need for a more detailed audit. General Audit: The general audit (alternatively called amini-audit, site energy audit or detailed energy audit or complete site energy audit) expands on the preliminary audit described above by collecting more detailed information about facility operation and by performing a more detailed evaluation of energy conservation measures. Utility bills are collected fora 12 to 36 month period to allow the auditor to evaluate the facility's energy/demand rate structures and energy usage profiles. If interval meter data is available, the detailed energy profiles that such data makes possible will typically be analyzed for signs of energy waste. Additional metering of specific energy-consuming systems is often performed to supplement utility data. In-depth interviews with facility operating personnel are conducted to provide a better understanding of major energy consuming systems and to gain insight into short and longer term energy consumption patterns. This type of audit will be able to identify all energy-conservation measures appropriate for the facility, given its operating parameters. A detailed financial analysis is performed for each measure based on detailed implementation cost estimates, site-specific operating cost savings, and the customer's investment criteria. Sufficient detail is provided to justify project implementation. Investment-grade audit: In most corporate settings, upgrades to a facility's energy infrastructure must compete for capital funding with non~nergy-related investments. Both energy and non-energy investments are rated on a single set of financial criteria that generally stress the expected return on investment (ROI). The projected operating savings -from the implementation of energy projects must be developed such that they provide a high level of confidence. In fact, investors often demand guaranteed savings. The investment-grade audit expands on the detailed audit described above and relies on a complete engineering study in order to detail technical and economical issues necessary to justify the investment related to the transformations.2a Energv reduction: Reductions in the amount of energy' (electricity, natural gas, etc.) used by a piece of equipment or an entire system of facility may or may not lead to a reduction in energy billings. Increases in the unit cost of energy (kWh, therms) over time may outweigh savings from reduced energy use. However, billing increase would have been substantially greater had reduction measures not been taken. Energv Star ~ Portfolio Manager: Energy Star offers a proven energy management strategy that helps in measuring current energy performance, setting goals, tracking savings, and rewarding improvements. EPA provides an innovative energy performance rating system which businesses have already used for more than 130,000 buildings across the country. EPA also recognizes top performing buildings with the ENERGY STAR designation. Portfolio Manager is an interactive energy management tool that allows you to track and assess energy and water consumption across your entire portfolio of buildings in a secure online environment. Portfolio Manager can help you set priorities, identify under-performing buildings, verify efficiency improvements, and receive EPA recognition for superior energy performance. 24 http://en.wikiyedia.orQ/wiki/Ener~y audit