Defining the Optimal Level of Pressure Fluctuations at Pressure Control Management Strategy for Reducing Water Losses in Water Networks

Öz

A significant rate of the physical losses in networks are caused by unreported leaks. Leaks are directly related to pressure, and many public institutions and researchers are conducting management studies on pressure parameters. Pressure management methods are classified as classical and advanced pressure management. Many studies conducted worldwide have enabled the minimization of operating pressure. In this study, the hourly pressure difference was selected as the parameter to be minimized during the pressure management study, and it was aimed to minimize the pressure fluctuations of the network during the day. The data of the working networks, the hydraulic model of which was created in the EPANET program, was transferred to the MATLAB environment with the EPANET-MATLAB Toolkit. First, the network was analyzed with classical pressure management. In the next stage, the operating scenario for the flow-sensitive advanced pressure management was started to be created. Genetic algorithm was used in the MATLAB environment to create the most suitable scenario. Inlet pressure was selected as the optimization variable. The sum of the hourly pressure change differences of the network during the day was selected as the objective function. As a result of the optimization, the average pressure fluctuations in the working area were reduced by 55% from 18.56 m to 8.41 m. In addition, the average pressure of the network was reduced from 48.2 m to 37.3 m.

Anahtar Kelimeler

• Pressure Management
• Pressure Surge
• Optimization
• EPANET-MATLAB

İçmesuyu Şebekelerinde Su Kayıplarının Azaltılması İçin Basınç Kontrol Yönetimi Stratejisinde Basınç Dalgalanmalarının En Uygun Seviyesinin Tanımlanması

Öz

Şebekelerde oluşan sızıntıların önemli bir kısmını yüzeye çıkmayan sızıntılar oluşturmaktadır. Sızıntılar basınç ile doğrudan ilişkili olup birçok araştırmacı basınç parametresi ile ilgili basınç yönetimi çalışmaları yürütmektedir. Basınç yönetimi metotları klasik ve ileri basınç yönetimi olarak sınıflandırılmaktadır. Dünya genelinde yapılan birçok çalışma ile işletme basıncının en aza indirilmesi sağlanmıştır. Bu çalışmada ise basınç yönetimi çalışması sırasında minimize edilecek parametre olarak saatlik basınç farkı seçilmiş ve şebekenin gün içerisindeki basınç dalgalanmasının en aza indirilmesi amaçlanmıştır. EPANET programında hidrolik modeli oluşturulan pilot şebekelere ait veriler EPANET-MATLAB Toolkit ile MATLAB ortamına aktarılmıştır. İlk olarak klasik basınç yönetimi ile şebekenin analizi yapılmıştır. Sonraki aşamada ise debiye duyarlı ileri basınç yönetimi için işletme senaryosu oluşturulmaya başlanmıştır. En uygun senaryonun oluşturulması amacıyla MATLAB ortamında genetik algoritma kullanılmıştır. Optimizasyon değişkeni olarak giriş basıncı seçilmiştir. Amaç fonksiyonu olarak şebekenin gün içerisindeki saatlik basınç değişim farklarının toplamı seçilmiştir. Yapılan optimizasyon sonucunda çalışma alanında basınç dalgalanmalarına ait ortalama 18.56 m’den 8.41 m’ye %55 oranında düşürülmüştür. Ayrıca şebekenin ortalama basıncı 48.2 m’den 37.3 m’ye düşürülmüştür.

Anahtar Kelimeler

• Basınç Yönetimi
• Basınç Dalgalanması
• Optimizasyon
• EPANET-MATLAB

Kaynakça

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