ASME EA-2–2009 pdf download.Energy Assessment for Pumping Systems.
shaft input power: the amount of power delivered to the shaft of a driven piece of equipment. system: logical group of energy-using industrial equip- ment organized to perform a specif c function. system boundary: the parts of a system that should be in- vestigated during the assessment process fall inside the system boundaries. Other parts might be connected to the system but are not included in the assessment. Such parts could, however, inf uence the overall goal or pur- pose of the system. The assessment team determines the proper system boundaries as well as the points at which eff ciency measurements should be made. system curve: a curve indicating the head required to achieve a certain f ow rate through a system for a f xed set of system conditions, including liquid levels, gas or vapor overpressure, and valve positions. The pump operates where the system curve intersects the pump curve. throttle: a device (normally a valve) that is used to in- crease the frictional resistance as a means to control f ow rate. total dynamic or differential head: the measure of energy per unit weight of liquid, imparted to the liquid by the pump. This can be described as an increase in height of a column of liquid that the pump would create if the static pressure head and the velocity head were con- verted without loss into elevation head at their respec- tive locations. variable frequency drive (VFD): an electronic device designed to control the rotational speed of an alternating current (AC) electric motor by controlling the apparent frequency and voltage of the electrical power supplied to the motor. Also referred to as an adjustable frequency drive. variable speed drive (VSD): any device that varies the speed of the pump, either mechanically or electrically. Also re- ferred to as an adjustable speed drive.
4.4 Access to Resources and Information For the performance of a complete and comprehensive assessment of a facility’s pumping system, it is necessary to physically inspect and make selected measurements on the system components. The assessment team shall have access to (a) facility areas and pumping systems required to conduct the assessment (b) facility personnel (engineering, operations, main- tenance, etc.), their equipment vendors, contractors, and others, to collect information pertinent and useful to the assessment activities and analysis of data used for prepa- ration of the report (c) other information sources, such as drawings, man- uals, test reports, historical utility bill information, com- puter monitoring and control data, electrical equipment panels, and calibration records 4.5 Assessment Goals and Scope The overall goals and scope of the assessment shall be discussed and agreed upon at an early stage by the as- sessment team. The overall goals of the assessment shall include identif cation of performance improvement op- portunities in the pumping systems being assessed and using a systems approach. The scope of the assessment shall def ne the portion(s) of the facility that is to be assessed. 4.6 Initial Data Collection and Evaluation Initial data collection occurring before the start of the assessment will save time for the assessment effort and should include but not be limited to the items in paras. 4.6.1 through 4.6.4. 4.6.1 Initial Facility Specialist Interviews. The as- sessment team shall contact personnel and specialists within the plant to collect information on operating practices and any specific operating considerations that affect energy use for the equipment. This infor- mation shall be used to help develop the site-spe- cific goals and assessment plan of action (paras. 4.7 and 4.8). 4.6.2 Energy Project History.