Energiatarbimise optimeerimine asula joogivee tootmisel
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Kuupäev
2015
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Valdavalt tagatakse linnade, asulate ja väiksemate üksuste joogivee varustus põhjavee
sügavamatesse kihtidesse rajatud puurkaevudega. Magistritöö eesmärgiks on küla joogivee
tootmise elektrienergia tarbimise optimeerimine. Puurkaevust pumbatakse joogivesi
süvaveepumba abil läbi veepuhastussüsteemi asula veevõrku. Töös on kirjeldatud kolme
süvaveepumba juhtimismeetodit:
1. Pumba otsekäivitus rõhulüliti juhtimisel.
2. Käivitamine sujuvkäivitiga rõhulüliti juhtimisel.
3. Juhtimine sagedusmuunduriga rõhuanduri tagasisidel.
Katseseeriate käigus analüüsiti süvaveepumba tööd, elektrienergia tarbimist, veekulu ja
elektrienergia erikulu erinevate juhtimismeetodite rakendamisel. Pumba elektriliste
parameetrite ja veekulu mõõtmiseks seati üles mõõtesüsteem ja viidi erinevate
juhtimismeetodite rakendamisel läbi katseseeriad. Andmete kogumiseks on kasutatud ka
eelnevalt üles seatud kaugjälgimissüsteemi. Uurimisobjektiks on Lõuna-Eestis Helme vallas
asuv puurkaevpumpla.
Arvutati erinevate juhtimismeetodite tunni keskmised erikulud kogu katseseeria kohta. Kõige
energiasäästlikum on pumba otsekäivitus, kuid arvestades tekkivat hüdraulilist lööki
torustikus ei ole selline juhtimismeetod soovitatav. Sujuvkäiviti kasutamisel saadud
elektrienergia sääst oli pea sama suur. Sagedusmuunduriga juhtimise eeliseks on stabiilne
rõhk veevarustussüsteemis, kuid töö vähese veetarbimisega perioodil rahalist säästu ei anna.
Veetarbimise suhteliselt suur muutus ööpäevas raskendab süvaveepumba töö optimeerimist.
Drinking water supply in cities, villages and rural areas are mostly based on groundwater. The main goal of the thesis is to optimize energy consumption in driven well drinking water production. Submersible pumps are used in driven wells for pumping water through filtration system into water supply network. To control submersible pump there are three studied methods: 1. Direct on line starting. 2. Controlling with soft starter. 3. Controlling with VFD (variable frequency drive). Test series were conducted to compare different submersible pump control methods. For that a measuring system was installed to measure water consumption and electrical parameters of the pump. SCADA (Supervisory Control and Data Acquisition) system that was installed prior to the test series for several objects in the area, was also used for data gathering. The object of study is Linna village pumping station in Helme parish, Estonia. As a result average specific electricity consumption was calculated for each hour of the test series. Most energy efficient control method was direct on line starting, but considering water hammering effect in pipeline it is not recommended. Controlling with soft starter was nearly as efficient. The benefit of using VFD is stable pressure in water supply system but in low water consumption periods it does not provide financial savings. Wide range of flow rate throughout the day makes the optimization of submersible pump difficult.
Drinking water supply in cities, villages and rural areas are mostly based on groundwater. The main goal of the thesis is to optimize energy consumption in driven well drinking water production. Submersible pumps are used in driven wells for pumping water through filtration system into water supply network. To control submersible pump there are three studied methods: 1. Direct on line starting. 2. Controlling with soft starter. 3. Controlling with VFD (variable frequency drive). Test series were conducted to compare different submersible pump control methods. For that a measuring system was installed to measure water consumption and electrical parameters of the pump. SCADA (Supervisory Control and Data Acquisition) system that was installed prior to the test series for several objects in the area, was also used for data gathering. The object of study is Linna village pumping station in Helme parish, Estonia. As a result average specific electricity consumption was calculated for each hour of the test series. Most energy efficient control method was direct on line starting, but considering water hammering effect in pipeline it is not recommended. Controlling with soft starter was nearly as efficient. The benefit of using VFD is stable pressure in water supply system but in low water consumption periods it does not provide financial savings. Wide range of flow rate throughout the day makes the optimization of submersible pump difficult.
Kirjeldus
Märksõnad
magistritööd, puurkaevud, pumbajaamad, veetõsteseadmed, elektrienergia erikulu