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Energikartläggning av Renovas anläggning i Sävenäs, Göteborg
University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
2017 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Energy audit of Renova’s plant in Sävenäs, Gothenburg (English)
Abstract [sv]

Renova hade behov av att utföra en energikartläggning på avfallskraftvärmeverket i Sävenäs. Syftet med detta examensarbete var att hjälpa till i den fullständiga energikartläggningen och komma med förslag på elenergibesparing. Under examensarbetet studerades endast elenergi.

Energimätningarna utfördes med två instrument från Chauvin Arnoux. Instrumenten som användes heter CA 8335 och CA PEL103. Objekt som mättes i anläggningen var värmare och motorer som driver fläktar och pumpar. De delar av anläggningen som mättes upp under examensarbetets tid var Panna 5 och de gemensamma laster som används för samtliga förbränningspannor. Anläggningens driftförhållanden varierar sällan och därför beslutades att göra dygnsmätningar.

Projektledaren bestämde att minst 80 procent av varje ställverks aktiva effekt skulle mätas upp för att få en godkänd nivå i energikartläggningen. Metoden för mätningarna var att starta på den största effektförbrukaren och arbeta sig ner mot den minsta effektförbrukaren. Mätningarna pågick i samma ställverk tills minst 80 procent av ställverkets aktiva effekt var uppmätt. Därefter fortsatte mätningarna i ett nytt ställverk. Parallellt med mätprocessen pågick analys av mätdata för att hitta möjliga förslag på elenergibesparing.

Under det här examensarbetet mättes 2576,6 kW utav 9500 kW upp, detta motsvarade 27,1 procent av hela anläggningens elenergiförbrukning. Utav den uppmätta medeleffekten gick 1097,5 kW till pumpar, 957,7 kW till fläktar, 90 kW till värmare och 431,4 kW till övrigt.

En energibesparing för MFL537-05 redovisas i form av ett förändrat driftmönster med hjälp av en frekvensomriktare. Objektet valdes eftersom fläkten inte drevs på ett effektivt sätt. Förändringen i driftmönstret skulle bespara cirka 50 MWh/år och 18 000 kr/år. Detta motsvarar 0,07 procent av anläggningens totala energiförbrukning på 74 200 MWh/år.

Abstract [en]

Renova had to perform an energy audit on their waste-to-energy plant at Sävenäs. The purpose of this thesis was to assist in the full energy audit and come up with proposals on how to make electric energy savings. Only electric energy was studied during this thesis.

Energy measurements were performed with two instruments from Chauvin Arnoux. Instruments used are called CA 8335 and CA PEL103. Objects that were measured in the plant were heaters as well as fans and pumps driven by motors. The parts of the plant that were measured during the work was Boiler 5 and the common loads that are used for all boilers. The plant’s operating conditions rarely change and therefore it was decided to make daily measurements.

The project manager decided that at least 80 percent of each switchgears active power should be measured to get an acceptable level in the energy audit. The method used during the measurements was to start on the largest power consumer and then work down to the smallest power consumer. The measurements took place in the same switchgear until 80 percent of the switchgears active power was measured. Afterwards the measurements continued in a new switchgear. Previous data were analyzed while the new measurements went on. The analysis was made in order to find possible proposals on how to make electrical energy savings.

During this work 2576.6 kW were measured out of totally 9500 kW. This measured power corresponds to 27.1 percent of the plant’s total electric energy consumption. 1097.5 kW was consumed by pumps, 957.7 kW was consumed by fans, 90 kW was consumed by heaters and 431.4 kW was consumed by other objects not included in any of the previously mentioned categories.

One proposal was presented for object MFL537-05. The proposal was to use an frequency converter to change the objects operating pattern. The change in the objects operating pattern would save approximately 50 MWh/year and 18 000 SEK/year, which equals 0.07 percent of the plants total energy consumption. The plants total energy consumption is 74 200 MWh/year.

Place, publisher, year, edition, pages
2017. , 54 p.
Keyword [sv]
Energi, kartläggning
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:hv:diva-10783Local ID: EXM505OAI: oai:DiVA.org:hv-10783DiVA: diva2:1079006
Subject / course
Electrotechnology
Educational program
Elkraft
Supervisors
Examiners
Available from: 2017-03-13 Created: 2017-03-07 Last updated: 2017-03-23Bibliographically approved

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