Better Understanding of the Capacity of Pressure Sensor Systems to Detect Pipe Burst within Water Distribution Networks

A Greedy Sampling Design Algorithm for the Modal Calibration of Nodal Demand in Water Distribution Systems

“…As mentioned previously, describes the effect of the pressure variation at node on the pressure variation at node . The sensors with different locations are not equally sensitive to the WDS hydraulic system [21,32,33] and the overall pressure sensitivity of the node can be quantified by . Assuming that a new pressure sensor will be installed at node , the calibration accuracy improvement at node itself will be .…”

Research on the water hammer protection of the air vessel caused by underground pipe burst in long distance water supply system

“…Using Taylor series expansion, Equation (2) can be written as H P can be calculated from Equation (10), then the value of Z st , Q 1 , Q 2 , Q st , P are determined.…”

“…Second, the only measure for water hammer protection is the air vessel, and the air vessel is installed behind the check valve at the upstream end of the pipeline. Because of the pipe sudden burst, the negative pressure wave generated by the pipe burst propagates downstream, and the points where the initial pressures are relatively low along the 4 , 0 (2018) MATEC Web of Conferences https://doi.org/10.1051/matecconf/201824601066 246 10 ISWSO 2018 pipeline may be reduced to the vaporization pressure, thereby causing the new burst points. From the above analysis, if the water can be supplied to the downstream pipeline in time when underground pipe burst occurs, the negative pressure wave propagating downstream will be cut off.…”

“…For instance, Jung et al proposed a method for quantifying mechanical reliability based on the simulation of a singlemeter failure for water distribution system pipe burst detection [9]. Qi et al investigated the underlying capacity of existing PSSs for pipe burst detection using a set of quantitative metrics [10].However, there is little study about transition process of underground pipe burst. Moreover, when designing water hammer protection scheme, the conventional air vessel is usually placed behind the check valve at the upstream end of the pipeline to effectively control the water hammer pressure due to pump trip, and the water hammer pressure caused by underground pipe burst has been neglected.…”

“…⑵ A new air vessel installation scheme that was the air vessel installed in the middle of the pipeline was proposed. ⑶ According to the air vessel installation scheme proposed in this paper, the numerical simulation is carried out through the method of characteristics, and compared with the conventional air , 0 (2018) MATEC Web of Conferences https://doi.org/10.1051/matecconf/201824601066 246 10 ISWSO 2018 vessel installation scheme. ⑷ Conclusions are at the end of the paper.…”