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Electrification of valve system
KTH, School of Industrial Engineering and Management (ITM).
KTH, School of Industrial Engineering and Management (ITM).
2019 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Elkonvertering av ventilsystem (Swedish)
Abstract [en]

This report is going to investigate the possibility to save energy by converting a valve opening mechanism in a waste disposal system from a pneumatic system to an electric system. To power the system, which mainly consists of an electric actuator and a valve control module, a solar panel system was designed. The valve system was controlled by the lightweight messaging protocol MQTT.

To be able to choose an electric actuator the needed force was measured and data regarding maximal stroke was taken from the data sheet of the existing setup.

For developing an optimal solar panel system a program was written in Google Spreadsheet. The program takes input regarding power, cycles, solar panel system specifications and environmental factors. The output from the program is energy consumption for the system, specification for solar charger, solar panel setup and charge data.

The result was that the solar panel system needed to consists of four 12 V VRLA batteries with a capacity of 90 Ah each and four solar panels with a rated power of 300 W each. The solar charger must be able to handle 900 W and provide an output current of 25,5 A to fulfil the demands.

The new electric actuator will consume four times less energy than the old pneumatic actuator. Most of the energy savings are consequences of reduced energy consumption at idle of the system.

A demonstarator was built to test the system.

Abstract [sv]

Den här rapporten kommer att undersöka möjligheten att spara energi genom att konvertera ett ventilöppningsmekanism i ett avfallshanteringssystem från ett pneumatiskt system till ett elektriskt system. För att driva systemet, som främst består av en elektrisk aktuator och en ventil styrenhet, ska ett solcellssystem designas. Ventilsystemet ska styras med hjälp lättviktsmeddelandeprotokollet MQTT.

För att kunna välja en aktuator mättes den behövda kraften och data angående maximal slaglängd togs från databladet på den nuvarande konstruktionen.

För att utveckla ett optimalt solcellssystem skrevs ett program i Google Kalkylark. Programmet använder energi, cykler, solcellssystem och miljöfaktorer som indata. Som utdata ges energiförbrukning hos systemet, specifikation för solcellsregulator, solpaneler och laddningsdata.

Resultatet var att det solcellssystem som behövs bestå av fyra 12 V VRLA batterier med en kapacitet på 90 Ah var och fyra solpaneler med en nominell effekt på 300 W vardera. Solcellssregulatorn behöver kunna hantera 900 W och generera en ström på 25,5 A.

Den nya elektriska aktuatorn kommer förbruka fyra gånger så lite energi jämfört med den gamla pneumatiska aktuatorn. Den största delen av energibesparingarna är en konsekvens av minskad energiförbrukning av systemet i vila.

En prototyp byggdes för att testa systemet.

Place, publisher, year, edition, pages
2019. , p. 51
Series
TRITA-ITM-EX ; 2019:20
Keywords [en]
Mechatronics, Actuator, Solar system, MQTT, Valve control
Keywords [sv]
Mekatronik, Aktuator, Solcellssystem, MQTT, Ventilstyrning
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-264516OAI: oai:DiVA.org:kth-264516DiVA, id: diva2:1373920
Supervisors
Examiners
Available from: 2019-11-28 Created: 2019-11-28 Last updated: 2019-11-28Bibliographically approved

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