Eesti Maaülikooli Tehnikamaja soojussõlme automaatikasüsteemi juhtimissignaalide analüüs
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Kuupäev
2016
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Käesoleva bakalaureusetöö eesmärgiks on analüüsida Eesti Maaülikooli Tehnikamaja
soojussõlme tööd võrguvee tühiläbijooksu olukorras ning leida lahendusi, et kirjeldatud
juhtumid ei korduks. AS Tartu Keskkatlamaja töötaja poolt juhiti Eesti Maaülikooli
haldusosakonna tähelepanu olukorrale, kus katlamajja on Tehnikamaja soojussõlmest
suur hulk kuuma vett tagasi tulnud, ehk on toimunud võrguvee tühiläbijooksud.
Ajaperioodid, mil soojussõlmes võrguvee tühiläbijooksud toimusid, kattusid aegadega,
mil sooritati katelseadmete õppelaboris katseid akumulatsioonipaagi soojusenergia
suunamiseks Tehnikamaja kütteks.
Võrguvee tühiläbijooksu olukorra tekke põhjuste mõistmiseks tutvuti
automaatikaprojektiga, teostati katsed võrguvee tühiläbijooksu olukorra taasloomiseks,
jäädvustati antud olukordades temperatuuri ning reguleerventiilide asendite väärtused.
Teostatud katsete tulemusena selgus, et ajamiga reguleerventiile ei juhita vastavalt
projektis kirjeldatule. Reguleerventiilide ebaadekvaatne juhtimine põhjustabki
Tehnikamaja soojussõlmes võrguvee tühiläbijooksu. Võib kahtlustada, et
automaatikaprogrammi häälestus on puudulik. Probleemi tagajärgede eemaldamiseks on
antud töös toodud kolm lahendust ning ühte neist ka katseliselt kontrolliti. Käesoleva töö
põhjal on kergem teha järeldusi Eesti Maaülikooli Tehnikamaja soojussõlme automaatika
tööst ning võimalik teha vajalikke täiendusi, et tagada soojussõlme korrektne toimimine.
The aim of this thesis is to analyze the Estonian University of Life Sciences Building of Technology’s heat distribution units work, while district water short-flowing is happening and to find solutions to the situation. Estonian University of Life Sciences department of management was brought to attention by AS Tartu Keskkatlamaja, that large amount of hot water has came back from heat distribution unit in Building of Technology to the boiler house. Time periods, when district network water was short-flowing through the heat distribution unit, were similar to time periods when tests were performed in the boilers laboratory. To understand the situation better, tests were carried out to re-create the occurrence. The systems parameters were logged and later on analyzed to better understand the problem. Tests showed that actuators were not operated, like it is described in the automation project. Inadequate actuator management was the cause of district water short-flow in heat distribution unit. Author of this thesis suspects that the automation programs setup is incomplete and not according to the project. There are three proposed suggestions to fix the occurrence on hot water short-flow in the heat distribution unit and one of the proposed suggestion was also tested. On basis of this thesis, further modifications to the automatics program can be made.
The aim of this thesis is to analyze the Estonian University of Life Sciences Building of Technology’s heat distribution units work, while district water short-flowing is happening and to find solutions to the situation. Estonian University of Life Sciences department of management was brought to attention by AS Tartu Keskkatlamaja, that large amount of hot water has came back from heat distribution unit in Building of Technology to the boiler house. Time periods, when district network water was short-flowing through the heat distribution unit, were similar to time periods when tests were performed in the boilers laboratory. To understand the situation better, tests were carried out to re-create the occurrence. The systems parameters were logged and later on analyzed to better understand the problem. Tests showed that actuators were not operated, like it is described in the automation project. Inadequate actuator management was the cause of district water short-flow in heat distribution unit. Author of this thesis suspects that the automation programs setup is incomplete and not according to the project. There are three proposed suggestions to fix the occurrence on hot water short-flow in the heat distribution unit and one of the proposed suggestion was also tested. On basis of this thesis, further modifications to the automatics program can be made.
Kirjeldus
Märksõnad
Eesti Maaülikool. Tehnikamaja, soojustehnika, automaatikasüsteemid, bakalaureusetööd