Matematički model plinske turbine u TETO Sisak

master's thesis

• Title (english): Mathematical model of power plant Sisak gas turbine
• Author: Nikola Krmelić
• Mentor: Mislav Čehil (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2016-12-08, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

U ovom radu izrađen je matematički model plinske turbine novog bloka TETO Sisak. Model je izrađen u programskom jeziku Visual Basic, odnosno njegovoj inačici Microsoft Visual Basic for Applications (VBA), kako bi se ubrzalo vrijeme proračuna modela i izbjeglo ručno izvođenje brojnih iteracija. Model je napisan pomoću osnova iz termodinamike i teorije turbostrojeva, a parametri modela podešeni prema podacima proizvođača plinske turbine. Raznim koeficijentima i korekcijskim krivuljama poboljšan je matematički model i proračun plinske turbine u području smanjenih opterećenja.

Razmotren je utjecaj temperature, relativne vlažnosti i tlaka okolišnjeg zraka na postrojenje plinske turbine upravo zbog korištenja okolišnjeg zraka za izgaranje goriva u komori izgaranja plinske turbine. Rezultati modela dani su za različita opterećenja plinske turbine, promjenu temperature, relativne vlažnosti i tlaka zraka. U modelu su zanemarena ograničenja snage postrojenja (uloga regulacijskog sustava) kako bi se razmotrio stvarni utjecaj različitih parametara na postrojenje plinske turbine. Područja prekoračenja maksimalno dopuštene snage postrojenja opisana su kao nedopuštena područja rada, gdje regulacijski sustav igra ulogu u zaštiti postrojenja od ulaska u takva područja.

Osim matematičkog modela i rezultata proračuna u ovom radu opisano je postrojenje TETO Sisak, dan je kratki pregled povijesnog razvoja plinskih turbina i njihove prednosti. Kako je plinska turbina bloka C TETO Sisak dio kombiniranog kogeneracijskog postrojenja, ukratko su opisani kombinirani procesi i kogeneracija te uloga plinske turbine u istima.

Abstract (english)

In this paper a mathematical model of the gas turbine, which is the part of the new CHP power plant “TETO Sisak”, is developed. The model is created in Visual Basic, actually in its version Microsoft Visual Basic for Applications (VBA), to decrease computing time and avoid manually performing of numerous iterations. The model is created using the basics of thermodynamics and turbomachinery theory, where model parameters are set by the manufacturer’s data. Mathematical model and calculation of the gas turbine partial loads are improved with various coefficients and correction curves.

Effects of the air temperature, relative humidity and atmospheric pressure changes on gas turbine operation are discussed because the ambient air is used for fuel combustion in the combustion chamber of the gas turbine. Calculation results are given for different loads of the gas turbine, and for different air temperatures, relative humidities and pressures. In the model limits in power of the plant are ignored (the role of the control system) in order to consider the real effect of various parameters on the gas turbines operation. Gas turbine loads at lower air temperatures when power exceed the maximum allowed power of the plant are described as unallowed loads and control system prevents operation in such loads.

Except the mathematical model and calculation results, in this tesis is description of the CHP plant Sisak, also there is a short overview of the historical development of gas turbines and gas turbine advantages. Since the gas turbine of the new CHP plant Sisak is a part of a combined cycle cogeneration plant, briefly are described the combined processes, cogeneration and the role of the gas turbine in cogeneration.

• Keywords: termoenergetska postrojenja; kombinirani ciklus; kogeneracija; plinska turbina; matematički model
• Keywords (english): power plants; combined cycle; cogeneration; gas turbine; mathematical model
• Language: croatian
• URN:NBN: urn:nbn:hr:235:124524
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-22 18:06:23