ASME EA-3–2009 pdf download

ASME EA-3–2009 pdf download.Energy Assessment for Steam Systems.
1.1 Scope This Standard covers steam systems that are def ned as a system containing steam generator(s) or other steam source(s), a steam distribution network and end-use equipment. Cogeneration and power generation compo- nents may also be elements of the system (gas turbines, backpressure steam turbines, condensing steam turbines). If steam condensate is collected and returned, the con- densate return subsystem is a part of the steam system. This Standard sets the requirements for preparing for, conducting, and reporting the results of a steam system energy assessment (hereafter referenced as an “assess- ment”) that considers the entire system, from energy in- puts to the work performed as the result of these inputs. An assessment complying with this Standard need not address each individual system component or specif c system within an industrial facility with equal weight; however, it shall be suff ciently comprehensive to iden- tify the major opportunities for improving the overall energy performance of the steam system. This Standard is designed to be applied primarily at industrial facili- ties, but most of the specif ed procedures can be used in other facilities such as those in the institutional and commercial sectors. The scope of work shall be to complete a comprehen- sive assessment on a steam system. In the case of an exceptionally large facility, it may be desirable to focus on only one of several steam systems. As a result, the assessment plan should be developed for this specif c system only. If an energy stream derives from or is di- rected to an adjacent system (possibly in an adjacent en- ergy-supplying or receiving facility), then the details of the energy streams (e.g., electricity, steam, natural gas) shall be considered as part of the assessment of the tar- get system.
1.2 Limitations This Standard does not provide guidance on how to perform a steam system assessment, but sets the re- quirements that need to be performed during the as- sessment. For additional assistance, see the companion ASME Guide for ASME EA-3-2009 Energy Assessment for Steam Systems on how to apply this Standard. (a) This Standard does not specify how to design a steam system. (b) This Standard does not specify the qualif cations and expertise required of the person using the Standard. (c) This Standard does not specify how to implement the recommendations developed during the assessment, but does include recommendations for implementation activities. (d) This Standard does not specify how to measure and validate the energy savings that result from imple- menting assessment recommendations. (e) This Standard does not specify how to calibrate test equipment used during the assessment. (f) This Standard does not specify how to estimate the implementation cost or conduct f nancial analysis for recommendations developed during the assessment. (g) This Standard does not specify specif c steps required for safe operation of equipment during the assessment. The plant personnel in charge of normal operation of the equipment are responsible for ensuring that it is operated safely during the data collection phase of the assessment.
2 DEFINITIONS assessment: activities undertaken to identify energy performance improvement opportunities in a steam system which consider all components and functions, from energy inputs to the work performed as the result of these inputs. Individual components or subsystems need not be addressed with equal weight, but assess- ments shall be suff ciently comprehensive to identify the major energy eff ciency opportunities for improv- ing overall system energy performance. System impact versus individual component characteristics should be discussed. assessment conditions: the operating conditions during the assessment period that serve as the basis of the measure- ments for the assessment investigations are identif ed as the assessment conditions. baseline conditions: a set of operating conditions, and the associated system energy use, that the assessment team will use as a basis for calculating energy improvement opportunity impacts. Baseline conditions can, for exam- ple, be the assessment operating conditions, normal op- erating conditions, future operating conditions, or past operating conditions.