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Full Description

Preface 

This is the first edition of CSA C502, Benchmark energy factor assessment of slurry pumping systems. This Standard is intended as a guide to be used to assess the overall energy performance of existing industrial slurry pumping systems by using benchmark energy factor (BEF) concepts. The BEF is the energy consumption of a system divided by the essential energy required to provide the same work under ideal conditions. CSA Group acknowledges that the development of this Standard was made possible in part by the financial support of BC Hydro, Hydro Québec, Independent Electricity System Operator, and Manitoba Hydro. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. 

Scope 

1.1 Inclusions This Standard is intended for industrial slurry pumping systems with the following characteristics: a) electrically driven single and multi-stage slurry pumps b) flowrate greater than 10 L/s c) average particle size (d50) between 50 um and 8 mm d) settling slurry e) slurry behaving as a viscous Newtonian fluid (shear stress is linear and proportional to velocity gradient; f) two-phase (liquid and solid) or three-phase (liquid, solid, and air) slurries g) any viscosity and h) slurry pumping systems with total pipe length less than 100 m. For longer pipe length, see Clause 5.4.2. 

1.2 Exclusions 

This Standard is not intended to be used for pumping systems with the following characteristics: a) slurries with transport fluid other than water; b) gravel and dredge pumpage (average particle size greater than 8 mm); and c) non-settling particle in concentrations that lead to a non-Newtonian slurry. 

1.3 Terminology

 In this Standard, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; should is used to express a recommendation or that which is advised but not required; and may is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. 

1.4 Units of measurement 

The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.