Browsing Faculty of Computing, Engineering and Media by Author "AbdelMeguid, Hossam Saadeldin"
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Item Open AccessCombined Energy and Pressure Management in Water Distribution Systems(ASCE, 2009-05-17) Skworcow, P.; AbdelMeguid, Hossam Saadeldin; Ulanicki, Bogumil; Bounds, Peter; Patel, RidwanIn this paper a method is proposed for combined energy and pressure management via integration and coordination of pump scheduling with pressure control aspects. The proposed solution involves: formulation of an optimisation problem with the cost function being the total cost of water treatment and pumps energy usage, utilisation of an hydraulic model of the network with pressure dependent leakage, and inclusion of a PRV model with the PRV set-points included as a set of decision variables. Such problem formulation led to the optimizer attempting to reduce both energy usage and leakage. The developed algorithm has been integrated into a modelling, simulation and optimisation environment called FINESSE. The case study selected is a major water supply network, being part of Yorkshire Water Services, with a total average demand of 400 l/s. Item Metadata onlyFeedback rules for operation of pumps in a water supply system considering electricity tariffs(ASCE, 2012) AbdelMeguid, Hossam Saadeldin; Ulanicki, Bogumil Item Metadata onlyMathematical modelling of a hydraulic controller for PRV flow modulation(CRC Press/Balkema, 2009-09-01) Ulanicki, Bogumil; AbdelMeguid, Hossam Saadeldin; Skworcow, P.The main purpose of this paper is to describe a new experimental setup for testing static and dynamic behav-iour of the AQUAI-MOD® hydraulic controller coupled with a standard PRV, as well as to develop mathe-matical models which represent static and dynamic properties of such a system. The controller has been ex-perimentally tested to assess its performance in different conditions and operating ranges. The device in all cases has showed good performance by modulating the outlet pressure as expected between two points corre-sponding to the minimum and the maximum flow. The mathematical models of the controller have been im-plemented and solved using the Mathematical software package to represent both steady state and dynamics conditions. The results of the steady state model have been compared with experimental data and showed a good agreement in the magnitude and trends. The steady state model can be used to simulate the behaviour of a PRV and the AQUAI-MOD® hydraulic controller in typical network applications. It can be also used at the design stage and to compute the required adjustments for the minimum and maximum head set points before installing the controller in the field. Subsequently, a dynamic model of the PRV and the AQUAI-MOD® hy-draulic controller system has been developed and solved. Again the dynamic model showed a good agreement with the experimental data. The main time constant in the system model corresponds to the movement of the main element of the PRV. The research presented here has been carried out within the Neptune project (www.neptune.ac.uk) which is a Strategic Partnership between EPSRC, ABB, Yorkshire Water and United Utilities. Item Metadata onlyMathematical modelling of a hydraulic controller for PRV flow modulation.(International Water Association Publishing, 2011) AbdelMeguid, Hossam Saadeldin; Skworcow, P.; Ulanicki, Bogumil Item Metadata onlyMathematical modelling of a hydraulic controller for PRV flow modulation.(Taylor Francis, 2010) AbdelMeguid, Hossam Saadeldin; Skworcow, P.; Ulanicki, Bogumil Item Metadata onlyOptimal pump scheduling with pressure control aspects: case studies(CRC Press/Balkema, 2009-09-01) Skworcow, P.; AbdelMeguid, Hossam Saadeldin; Ulanicki, Bogumil; Bounds, PeterIn this paper a method for combined energy and pressure management via integration of pump scheduling with pressure control aspects is described and applied to a medium scale water supply network. The method is based on formulating and solving an optimisation problem and involves utilisation of an hydraulic model of the network with pressure dependent leakage and inclusion of a PRV model with the PRV set-points included in a set of decision variables. Such problem formulation led to the optimizer attempting to reduce both energy usage and leakage. Case study considered revealed potential for substantial saving in electrical energy cost using the proposed method. This research is sponsored by and is a part of EPSRC Neptune project www.neptune.ac.uk). The authors are grateful to Ridwan Patel of Yorkshire Water Services for providing the data used in this paper. Item Metadata onlyPressure and leakage management in water distribution systems via flow modulation PRVs.(ASCE, 2012) AbdelMeguid, Hossam Saadeldin; Ulanicki, Bogumil Item Open AccessPressure control in district metering areas with boundary and internal pressure reducing valves(ASCE, 2008-08-17) Ulanicki, Bogumil; AbdelMeguid, Hossam Saadeldin; Bounds, Peter; Patel, R.Despite operational improvements over the last 10-15 years, water utilities still are losing a significant amount of potable water from their networks through leakage. The leakage is managed on the one hand by reactive and proactive maintenance and on the other hand by pressure control to reduce background leakage from connection and joints. This paper is based on experience from the Process Control – Water Software Systems group which was involved in many pressure control projects and the current Neptune project (www.neptune.ac.uk). A fast and efficient method to calculate time schedules and flow modulation curves is presented. Both time and flow modulation can be applied to a single inlet DMA. Time modulation can be applied to a multi-inlet district metering area (DMA) but this is not always possible for flow modulation due to the risk of hunting. It is convenient to distinguish between boundary and internal pressure reducing valves (PRVs), the decision variable for a boundary valve is a PRV set-point whereas for the internal valves it is a valve resistance. The resistance is then automatically translated into a set-point for field implementation. The time modulation methodology is based on solving a nonlinear programming problem with equality constraints represented by a hydraulic model with a pressure dependent leakage term and inequality constraints representing operational requirements (e.g. pressure at critical nodes). The cost of boundary flows which include leakage flows is minimized. An extended content model with pressure dependent leakage is simulated to provide a starting point for quick convergence. Optimal time schedules are converted into flow modulation curves by plotting scatter plots of flows against heads.The algorithm has been implemented as a module in the FINESSE package and allows complete pressure control tasks to be solved. A user needs to provide an hydraulic model, eakage information and leakage characteristic – leakage area and the exponent in the pressure power law. The program calculates time schedules and also flow modulation curves for single and multi-inlet PRVs. Evaluation of optimal control strategies and benefit analysis in terms of leakage reduction for two case studies provided by Yorkshire Water Services is included. Item Metadata onlyPressure control in district metering areas with boundary and internal pressure reducing valves.(ASCE, 2009) Ulanicki, Bogumil; AbdelMeguid, Hossam Saadeldin; Bounds, Peter; Patel, R.