Hydraulic analysis in the circular water supply network with WaterCAD V8i software application

U ovom radu provedena je hidraulička analiza prstenaste vodoopskrbne mreže na primjeru naselja Tar u Istri. Rad je podijeljen u tri dijela. U prvom dijelu rada opisane su osnovne jednadžbe u strujnoj cijevi te osnovni zakoni na kojima se temelji Hardy - Crossova metoda za rješavanje prstenastih sustava pod tlakom. Također, navedeni su principi Hardy – Crossove metode te detaljno opisane metode petlje i čvora. U drugom dijelu rada detaljno su opisani ulazni parametri koji su uneseni u WaterCAD V8i program kojim se provela analiza. Analizirane su tri varijante vodoopskrbne mreže u ovisnosti o položaju vodne komore i broju vodnih komora. U zadnjem dijelu rada prikazani su rezultati analize: tlakovi u mreži, brzine i protoci, oscilacije u vodnim komorama te su analizirani određeni prsteni unutar vodoopskrbne mreže.The main aim of this thesis is hydraulic analysis of looped water distribution network in the town Tar, located in Istria. There are three parts of the thesis. First part of the paper presents the equations in a closed conduit and fundamental laws of mechanics. Furthermore, basics assumption that need to be satisfied for Hardy – Cross method are described as well as method of balancing heads and method of balancing flows. Second part consists of a detailed description of all the inputs for the WaterCAD V8i software which is used for this analysis. There are three types of network, difference between them is altitude and number of surge tanks. The last part is about outputs after analysis such as: pressure in a network, velocity and flow in a conduit, oscillations in a surge tanks and analysis in some loops of conduits