Pretočni sistemi z dinamiko prvega in drugega reda

Kučič, Andrej (author), Cerar, Janez (mentor)

Cilj diplomskega dela je pripraviti poskus s področja seznanjanja s sistemi dinamike prvega in drugega reda, ki bi ga pri laboratorijskih vajah študenti lahko izvedli samostojno. Poskus bi moral biti ponovljiv ter izbran tako, da bi si študenti lahko čim lažje predstavljali vplive parametrov na odziv eksperimentalnega sistema. Zaželeno je, da bi bilo ujemanje med teoretično napovedjo, ki sledi iz nastavitev parametrov pri poskusu, čim boljše. Izidi poskusa bi se tako morali čimbolj ujemati z napovedmi teorije dinamike sistemov prvega in drugega reda. Za dosego tega cilja je bilo potrebno najti primerne pogoje in določiti najbolj ustrezne parametre, ki dobro ponazarjajo razliko med dinamiko sistemov prvega in drugega reda. Kot nazoren eksperimentalen sistem, ki ustreza tem zahtevam, smo identificirali sistem dveh zaporedno povezanih čaš (posod), v katerih je zagotovljeno dobro mešanje tekočine v čašah, skozi čaši pa se pretaka raztopina elektrolita. Spreminjanje koncentracije elektrolita pri spremembi sestave tekočine, ki vteka v sistem, smo spremljali konduktometrično. Ujemanje med eksperimentalnimi rezultati ter teoretičnimi napovedmi smo pri poskusih prikazali grafično.

• Language: Slovenian
• Keywords: pretočni sistemi, električna prevodnost, raztopina soli
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2020
• PID: 20.500.12556/RUL-119684
• COBISS.SI-ID: 32310019
• Publication date in RUL: 10.09.2020

Secondary language

• Language: English
• Title: Continuous-flow systems with the dynamic response of the first and the second order

Abstract

The objective of this diploma work is setting up an experiment that would demonstrate the dynamic response of the first and of the second order in continuous-flow systems. Additionally, such an experiment should be simple enough to be independently carried out by students. The experiment should give predictable responses which can be predicted in advance by strong relation between the values of physically meaningful parameters and the influence of this parameters on the outcome of the experiment. It is preferred that the experimental results quantitatively match to the theoretical predictions calculated upon the values of the crucial parameters measured at the beginning of the experiment. As a suitable experimental system meeting the given criteria we have identified a system consisted of two consecutively connected beakers whose content is efficiently stirred during the constant flow of the electrolyte solution through the system and exposed to a step change of the concentration of electrolyte solution flowing through the system. Time depended electrolyte concentration in each of two beakers is monitored by measuring conductivity of electrolyte solution. The agreement of experimental results and theoretical prediction is shown on graphs.

• Keywords: continuous-flow systems, electrical conductivity, salt solution