Energy Saving Boundary of the Independent Metering System

CHEN Hui, SHI Cheng-wei, DU Heng, LIU Xiao-yang, CAI Zi-yang

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CHINESE HYDRAULICS & PNEUMATICS ›› 2021, Vol. 45 ›› Issue (2) : 63-70. DOI: 10.11832/j.issn.1000-4858.2021.02.010

Energy Saving Boundary of the Independent Metering System

  • CHEN Hui1,2, SHI Cheng-wei1,2, DU Heng1,2, LIU Xiao-yang1,2, CAI Zi-yang1,2
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Abstract

In order to find the ultimate energy saving boundary and clarify the energy saving mechanism of the independent metering system (IMS), static efficiency models and static energy consumption models of the conventional valve-controlled system (CVS) and the IMS are established, and then simplified to non-dimensional form by normalization method. Two kinds of working conditions which can be compared with the CVS are selected, that is, the same pump pressure source conditions and the same orifices area conditions. The comparison is made when the IMS is in the ultimate energy saving condition (the meter-out orifice is full-opened). Finally, the static efficiency and static energy consumption of two systems under different working conditions are analyzed by simulation. The comparison of efficiency distributions under all working conditions is obtained by the efficiency mapping. The results show that under the same pump source pressure, the IMS can improve the efficiency by about 5.7% and reduce the energy consumption by about 22.7% at most. Under the same orifices area, the IMS can improve the efficiency by about 19.4% and reduce the energy consumption by about 53% at most. The IMS can reduce the throttling loss of the orifices, and thus reduce the energy consumption of the CVS.

Key words

independent metering system / energy saving boundary / energy saving mechanism / normalization method / efficiency mapping

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CHEN Hui, SHI Cheng-wei, DU Heng, LIU Xiao-yang, CAI Zi-yang. Energy Saving Boundary of the Independent Metering System[J]. CHINESE HYDRAULICS & PNEUMATICS. 2021, 45(2): 63-70. https://doi.org/10.11832/j.issn.1000-4858.2021.02.010

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