ASME EA-4-2010 pdf free download.Energy Assessment for Compressed Air Systems.
This Standard is designed to be applied primarily at industrial facilities, but many of the concepts can be used in other facilities, such as those in the institutional and comnwrcial sectors.
Assessments involve collecting and analyzing system design, operation, energy use, and performance data and identifying energy performance improvement op. portunities for system optimization. An assessment may also include additional information, such as recommendations for improving resource utilization, reducing per unit production cost, reducing lifecycle costs, and improving environmental performance related to the assessed system(s). Assessment activities include, but are not limited to, engaging facility personnel and providing information about the assessment process; collecting and analyzing data on system design, operation, energy use, and performance; identifying energy performance improvement opportunities; and making recommendations for system improvement and implementation in a written report. This report should document system design; quantify energy operation and performance data; document the assessment process; show results, recommendations, and energy savings projections; and improve facility personnel’s understanding of system energy use and operation.
This Standard sets requirements for
(a) organizing and conducting a compressed air system assessment
(b) analyzing the data from the assessment
(c) reporting and documentation of assessment findings When contracting for assessment services, plant personnel may use the Standard to define and communicate their desired scope of assessment activity to third party contractors or consultants
1.2 Limitations
This Standard does not provide guidance on how to perform an assessment for compressed air systems hut sets the requirements that need to be met during the assessment. For additional assistance, see the companion ASME Guidance for ASME EA-4 Energy Assessment for Compressed Air Systems on how to apply this Standard.
(a) This Standard does not specify how to design a compressed air system.
(b) This Standard does not specify the qualifications 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 implementing assessment recommendations.
(e) This Standard does not specify how to calibrate test equipment used during the assessment.
1.3.2 System Energy Efficiency. Most industrial íacilities are both producers and consumers of compressed air, as shown in Fig. 2. An industrial plant’s efficient use of compressed air energy is based on the total energy input to the compressed air system and the production output of the manufacturing process. There are two basic ways to reduce the energy consumption of a compressed air system: produce compressed air more efficiently; and consume less compressed air.
For a given level of production output, the compressed air system assessment requires two important measures
(a) the total amount of primary energy resource used to generate the total amount of compressed air consumed
(b) the total amount of compressed air consumed for a given level of production output
Paragraph 1.3.2.2(a) is a measurement of supph and para. 1.3.2.2(b) is a measurement of demand. If supply is considered without demand or demand is considered without supply, the analysis is incomplete. Application of this Standard shall apply the systems approach (para. 1.3.3) considering both supply and demand and the relation each hasre to the other.
1.3.2.1 Compressed Air Energy Conversion. Compressed air is an inefficient means of energy transmission. Beginning with 15% conversion efficiency and considering other inefficiencies, such as frictional resistance in transmission, waste, and misuse, 10% or less of the primary energy resource is applied to productive work.