词条 | Specific pump power |
释义 |
DefinitionThe SPP for a specific operating point (combination of flow rate and pressure rise) for a pump system is defined as: where:
Just as for SFP (i.e. fan), SPP is also related to pump pressure (pump head) and the pump system efficiency, as follows: where:
This equation is simply an application of Bernoulli's principle in the case where the inlet and outlet have the same diameter and same height. Observe that SPP is not a property of the pump alone, but is also dependent on the pressure drop of the circuit that the pump circulates fluid through. Thus, in order to minimize energy use for pump system, one must reduce the system pressure drop (e.g. use large diameter pipes and low flow rates) in addition to selecting pumps with good intrinsic efficiency (hydrodynamically efficient with an efficient motor). Applying the above equations enables us to estimate electrical power consumption in a number of ways: where:
See also
References1. ^{{cite thesis|url=http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.851.7564&rep=rep1&type=pdf |author=CAROLINE MARKUSSON |title= Efficiency of building related pump and fan operation Application and system solutions |publisher=Chalmers University of Technology |accessdate=16 May 2018}} 2. ^{{cite report|title=A zero emission concept analysis of a single family house |url=https://brage.bibsys.no/xmlui/bitstream/handle/11250/2387643/ZEB+rapport_no_09.pdf?sequence=3 |accessdate=16 May 2018}} 3. ^{{cite article|title=Technical Assessment of the Combined Heat and Power Plant at the Oregon Institute of Technology, Klamath Falls, Oregon |journal=GRC Transactions |volume= 36 |year=2012|url=http://large.stanford.edu/courses/2015/ph240/crane1/docs/1030376.pdf|accessdate=16 May 2018}} 4. ^{{cite journal|url=https://www.witpress.com/Secure/elibrary/papers/SI12/SI12011FU1.pdf |title=Novel reverse osmosis desalination of sea water |author=D. F. Dyer & J. S. Ragan |ISSN=1743-3541 |journal=WIT Transactions on Ecology and The Environmen |volume=168 |year=2012}} 1 : Pumps |
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