ISO/ASME 14414:2015 pdf free download

ISO/ASME 14414:2015 pdf free download

ISO/ASME 14414:2015 pdf free download.Pump system energy assessment.
For systems operating a long time under part load or having large demand changes, proper measures should be taken in orderto maintain high operating efficiency forall conditions, when It is technologically and financially practicable.
Process requirements should be evaluated to determine that the system is running efficiently, within applicable quality, health and safety requirements. If the system is not running within the established boundaries, a plan for correction should be made and implemented.
B.2.3 System updating and improvement
Forany system that fails to meet the established efficiency requirements after an assessment, the system operation should be examined and a report should be produced to document the current operation, including: test method and data analysis. efficiency improvement measures, and responsibilities.
This report should be kept in an accessible location.
When pump systems have been installed or undergo updates, an assessment should be conducted to establish base operating conditions.
B.2.4 Pump system piping
Increasing the internal pipe diameter is usually the most effective way to decrease the pipe friction losses and the resulting energy consumption. For example, 10 % diameter increase leads to a decrease of approximately 40 % in losses for the turbulent flow region. In general, Ilow velocities should be kept as low as practically possible in regard to the liquid material suspended being pumped.
The number of pipe bends should be minimized and the radius of curvature of turns should be as large as economically feasible in order to minimize friction losses. A minimum of 1,4 tImes longer than the pipe diameter is recommended for such turns.
Rapid diameter changes should be avoided. Diffusers should be used when possible.
When selecting components, considerations should be made to minimize the friction losses across the equipment. The equipment should be suitable for the liquid being pumped.
The elevation and pressure on the surlace of liquid in a tank affects the systems static head. Wherever possible, static head should be minimizetL
B.3 Common causes and remedies for excessive energy consumption for rotodynamic pump
B.3.1 General
It is important that a thorough understanding of system requirements be established before the application ofany analysis technique. This includes distinguishing between system design specifications and actual process requirements before evaluating energy savings opportunities.