ASME 14414 pdf download

ASME 14414 pdf download.Pump system energy assessment.
Depending on the level of assessment, data shall be collected in accordance with Tablel.
5.1.2 Level 1 assessments
Level I assessment shall include gathering of system inforniation for pumping systems considered for evaluation within the scope of the assessment.
Level I assessment shall start with the pre-screening.
During the pre-screening. the control methods for the different systems shall be noted. It shall be determined which systems are best suited for a closer evaluation. It should also be noted if changes to the pump system will affect other systems, thereby Introducing constraints on potential optimization strategies for the pump system.
As much Informatmn as practical should be collected during the level 1 assessment.
The availability at the facility of some types of data (see £) should also be reported during the level I assessment even if It is not collected,
A pre-screening worksheet shall be used to assist In this pre-screening exercise. A typical example of worksheet to aid in the data collection process Is given in Annex E.
In general, the steps taken during the pre-screening shall include the following:
a) sort by driver size, annual operating hours, and estimated energy cost;
b) focus on centrifugal pumps operating at fixed speed:
c) focus on pumping systems that throttle and recirculate for [low control;
d) look [or energy-waste symptoms such as large difference in supply and demand, tommunly ddIIeveU through valve throttling and by-pass flows (see £1);
e) identify inefficient pumping systems via maintenance and operational staff Interviews and review of maintenance records;
1) select for assessment those systems that appear most likely to exhibit savings potential.
From this information the assessment team shall make estimates regarding the potential for energy savings in each system and shall select the pumping systems that meet the criteria for level 2 or level 3 assessments.
5.1.3 Level 2 assessments
Level 2 assessments shall be performed when it is clear that the observed operating conditions are representative for the operation of the systems and the changes In operatIng condition are small or non-existent.
Level 2 assessments shall be performed using data taken from the facility Information systems, In paper or electronic format, or by using portable measuring devices. The measurements shall cover a limited amount of time, thus giving a snapshot of the operating conditions at the time or measurement.
5.1.4 Level 3 Assessments
Level 3 assessments shall be made on pumps systems where conditions vary substantially over time. For such systems, the assessment team shall record the system performance data over the time period or capture data at the extreme duty points. This activity shall be associated with more extensive use of in situ monitoring to ensure that the operating conditions can be accurately determined at the various duty points (I.e. design point, normal, rated, maximum and mtnlmum flow rates). The monitoring shall be made by connecting transducers to data logging equipment and recording the sensor output, or in some facilities, where historical information is stored, the relevant Information should be downloaded from the facility information system.
5.2 Walk Through
A walk through Is required for level 2 and 3 assessments and may be required for some pumping systems undergoing a level I assessment.
The walk through shall entail examination throughout ensuring that the information provided to the assessment team reflects the configuration of the existing systems.
For the pumping systems undergoing level 2 and 3 assessments, after the walk through is completed, the information listed in 55 shall be collected using the methodologies specified in £6.
All components of the system shall be considered and pertinent information such as valve locations. locations of available pressure taps. flow meters. valve positions etc. should be noted.
During the walk through, information about the control methods for the different systems such as valve settings should be noted.
The assessment team shall also identify any existing conditions that are often associated with inefficient pumping system operation.
These conditions may he identified through the following potential indicators:
a) pumping systems where significant throttling takes place1)
b) pumping systems with recirculation of flow used as a control scheme:
c) pumping systems with large flow or pressure variations;
d) systems with multiple pumps where the number of operated pumps is not adjusted in response to changing conditions.