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Executive Summary The Self-Generation Incentive Program (SGIP) was initiated in March 2001 by the California Public Utilities Commission (CPUC). The intent of the SGIP is to help promote the development of distributed generation facilities located at utility customer sites that partially or completely offset their energy needs. The SGIP reflects energy policies stemming from the original enactment of the Public Utility Regulatory Policies Act (PURPA) of 1978. A primary focus of PURPA was to help improve the overall efficiency of the electricity system by expanding the use of cogeneration facilities that could generate both power and heat for beneficial purposes. In order to be eligible for special power purchase provisions established under PURPA, qualifying cogeneration facilities had to achieve specified levels of energy efficiency and useful waste heat recovery. In a ruling on June 14, 2001, the CPUC adopted waste heat recovery and efficiency standards as set forth in Public Utility Code (PUC) Section 218.5 for non-renewable qualifying facilities implemented under the SGIP. Cogeneration facilities represent a very important component of the SGIP. As of the end of 2005, cogeneration facilities made up nearly 60% of the installed generating capacity of the SGIP. However, questions have been raised about levels of energy efficiency and useful waste heat recovery being achieved at SGIP cogeneration facilities. Impact evaluations conducted by Itron in 2005 indicated that a number of cogeneration facilities were not achieving the requirements established under PUC 218.5. In December 2005, the SGIP Working Group directed Itron to investigate the levels of energy efficiency and useful waste heat recovery being achieved at SGIP Level 3/3N cogeneration facilities. If Itron found that SGIP cogeneration facilities were having problems meeting PUC 218.5 requirements, probable causes of the problems were to be identified and, where feasible, possible solutions recommended to promote better ways to achieve improved system efficiencies and useful waste heat recovery. ES.1 Approach On behalf of the SGIP Working Group, Itron conducts periodic measurement and evaluation (M&E) of distributed generation facilities installed under the SGIP. As a result, a certain amount of directly metered data is available on the amount of electricity generated, heat recovered, and fuel used at each site. In addition, Itron has access to electricity, fuel use, or recovered waste heat data monitored by the utilities, Itron, or third-party providers. Based on this information, Itron estimated actual achieved efficiencies and useful waste heat recovery levels for each facility and compared them against the PUC 218.5 requirements. The M&E Executive Summary ES-1PDF Image | In-Depth Analysis of Useful Waste Heat Recovery and Performance of Level 3/3N Systems
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