ASME EA-3-2009 pdf free download.Energy Assessment for Steam Systems.
(d) identification and prmntization of largest energyusing equipment, systems, and presses
fe) results of currently relevant steam system energy studies/surveys, ii any (e.g., backpressure turbine study. steam trap study)
(ft identification of approved, initiated. ftectt-d, and on-hold steam system projects
(g) identification of production and maintenance issues that affect or are affected by steam system performance
(h) boiler lags including gcnei-al boiler operations. chemical analysis reports. steam production, condensate return, and others
(1) relevant steam system operational and maintenance records
(j) preliminary information of plant operating conditions as it pertains to the operation of the steam system
4.5.1 Initial Facility Specialist Interviews. The assessment team shall interview personnel and specialists within the plant to collect information on operating practices and other operating considerations that affect energy use for the equipment. This information shall be used to help develop the .issessnwnt goals and scope and the assessment plan of action (paras. 4.6 and 4.7).
4.5.2 PrImary Energy Cost. Energy cost data shall be characterized in specific terms with units such as cost per energy unit (S/MMBtu or $/kWh), or other similar terms. The specific costs should consider all charges such as purchased cost, transportation cost, demand charges, peak rates, time-of-day rates, and any other costs up to the paint of use, in many cases establishing the economic impact of an increase (or decrease) of an energy stream can ftLiift a complete system analysis. A facility may have already established a cost for energy
— often these are based on blended or average conditions. Average values arc appropriate in some cases; however, very often average coals do not relk-ct true economic impact.
4.6 Assessment Goals and Scope
The overall goals and scope of the assessment shall be discussed and agreed upon at an early stage by the assessment team. The overall goal of the assessment shall include evaluation of the performance of the key individual system components. evaluation of the performance of the entire system, and identification of performance improvement opportunities. The assessment will be conducted using a systems approach evaluating the true impacts of potential system changes.
The scope of the assessment shall define the portion(s) of the facility that is to be assessed. Many steam systems are sufficiently confined to allow the entire system to be assessecL However, some systems are extrenwly complex and widespread, requiring a segmented investigation approach. In these instances a clearly defined subset of the steam system can serve as the assessment scope as long as the boundaries are clearly defined and the interactions at the boundaries are appropriately evaluated.
As the assessment progresses, the potential improvement opportunities and tlw importance of individual cornponents to these pportunities will become more dearly defined. As a result, the investigation strategy, measurement intensit and critical parameters will be more clearly identified. These factors will enable more defined goals to be established, Therefore, the goals (and scope) of the assessment should be periodically reevaluated to ensure the locus of the assessment team is appropriately applied.
4.7 Assessment Plan of Action
Tofacilitatetlwassessment and clarity toallassessment team members how the assessment will be conducted, it is essential that an action plan for the assessment be des s’cloped and be agreed upon. The assessment activities and their sequence shall be defined. It should be noted that some actions/decisions depend on the findings during the assessment. The pLan thus must be flexible and should accommodate various outcomes depending on such findings. In short, it is necessary to
(a) review initial data to identify how much is known about the systems
(b) identify assessment objectives
(1) Identify the systems that are going to be included in the assessment.
(2) Identify what additional data needs to be collected either through available records or by additional instruments.
(3) Identify the responsibility of collecting additional data.
(c) identify data analysis methods
(1) Identify how the data will be analyzed.
(2) Identify tools/software programs that are going tobe used.