Analiza nestacionarnih pojava pri puštanju vrelovoda u rad

undergraduate thesis

• Title (english): Analysis of transient flow during putting the hot water pipeline into operation
• Author: Ivan Heinrich
• Mentor: Ivo Džijan (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U radu su analizirane prijelazne pojave koje nastaju prilikom puštanja segmenta vrelovodne
mreže u rad. Dan je opis dijelova mreže koji se puštaju u rad zajedno s protokolom puštanja
dionice te je izveden matematički model nestacionarnog strujanja kapljevine koji se rješava
numeričkom metodom karakteristika. Na kraju su dani rezultati u kojima su uspoređene
nestacionarne pojave za više različitih vremena otvaranja kuglastog ventila čija je promjena
koeficijenta lokalnog gubitka poznata. Ti rezultati pokazuju da se za različita vremena
otvaranja ventila tijekom puštanja vrelovoda u rad ne pojavljuju pulsacije tlaka koje bi mogle
biti opasne za rad i funkcionalnost vrelovoda.

Abstract (english)

In the work, transient phenomena occurring during the commissioning of a heating network
segment were analyzed. A description of the network components that are put into operation,
along with the commissioning protocol of the section, was provided, and a mathematical
model of unsteady fluid flow was derived, solved using the method of characteristics. Finally,
the results were presented, comparing unsteady phenomena for various times of opening the
ball valve, whose change in the coefficient of local mechanical loss is known. These results
indicate that for different valve opening times during the commissioning of the heating
network, pressure pulsations that could be dangerous for the operation and functionality of
the network do not occur.

• Keywords: Prijelazne pojave; Vrelovod; Metoda karakteristika; Vrijeme otvaranja ventila; Piezometrička visina
• Keywords (english): Transient phenomena; Hot water pipe; Method of characteristics; Valve opening time; Piezometric height
• Language: croatian
• URN:NBN: urn:nbn:hr:235:332366
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-09-25 09:20:32