ASME EA-2:2009 pdf free download.Energy Assessment for Pumping Systems.
5.2 Assessment Levels
There are different levels of assessment, and different systems require varying work efforts to assess their efft’ctivencss. There are cast’s when a rudimentary analysis can show possible savings, ic.. mow pumps are running than necessary and it is easy to calculate savings by turning unnecessary pumps off. This can be determined during a Level 1 assessment. Level I also prescreens pumps to determine if a Level 2 or Level 3 assessment is required. flu’ next level, Level 2,is when system conditions are stable and a snapshot of the performance data is enough to calculate the saving opportunities. The most demanding case, Level 3, is when there are large changes in system demand over time and the system in question has to be monitored over a longer period of time. See Fig. 2.
The specific data and actions reqUired for thew three levels an considerably different in magnitude — and the effort required to acquire and implement can also vary within an indiidual level. For example. a system that already has installed flow and power meters that provide accurate data would be much more easaly dealt with in a Level 2 assessment than one that has neither. Likewise, for a Level 3 assessment, lithe facility already has a database o historical flow rates, valve positions, pressures, etc.. the need for temporary data logging can be significantly reduced.
The activities that comprise the Level I prescreening. policies, and practices shall be applied to all plant systems reviewed, While individual system symptoms (in prescreening) and component features (policies and practices) arc considered, the breadth of equipment covered in these areas will be such that it is generally not practical to take system level detaih into account When a system undergoes a Level 2 cc Level 3 assessment, ills analyied and treated on a detailed, system-level basis. Alternativel when a system undergoes a level I assessment, it is only afforded policy/practice consideration.
For a system in which a change cannot be justified at present, but might as circumstances change, the policies and practices arena should include an evaluation process. This process should determine whether the extent of the potential savings justifies preparatory work (such
as detailing actions to take in the event of a component failure).
ASME EA-2:2009 pdf free download
