Fristående energiförsörjning av transportband
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Sandvik Process Systems, SPS, in Sandviken produces steel belt conveyors used in a wide variety of industries over the world. The conveyors are used totransport products in different stages of the production. The aim of this project was to investigate the possibilities to run a steel belt conveyor off grid, powered by a renewable energy source. This would make the conveyor suitable for customers located where the electrical grid is insufficient or for customers valuing green energy. SPS desired a mobile prototype enabling them to bring the system to exhibition fairs. Optimal power system was dimensioned theoretically before a prototype of the system was built at SPS in Sandviken. The prototype was used to verify the results from the simulations. The initial literature study resulted in three energy systems suitable for operation of a conveyor; a) PV powerb) Wind powerc) Genious Stirling engineAs for the operation of the conveyor in Sandviken, wind power was not evaluated as an alternative since there were no data available for wind speeds closer than 40 km from the location of the prototype. This resulted in unreliable simulations complicating the dimensioning of the system.The Genious Stirling engine was also excluded as an option for the prototype since SPS has no production delivering waste heat at desired temperature. Operating the conveyor with the engine would require an annual supply of 1,3 ton pellets which also requires a flue gas tube. This would complicate the transportation of the prototype to exhibition at indoor fairs. Therefore, PV power system was evaluated as the final power system for the prototype in Sandviken. The result of the simulations showed that a system of 10 kW PV power together with 1 200 Ah batteries at 24 V would be enough to supply the conveyor with power for nonstop operation in Sandviken. These PV modules would have a total area of 63,2 m2. To facilitate the transportation to fairs the final system was 1 kW PV power with 400 Ah batteries at 24 V. The total module area of this system was 6,3 m2. The system would supply the conveyor with power at 67% of the year, roughly the total demand April to September. The modules were placed with a tilt of approximately 60° to reduce the risk of snow covering the panels during the winter.Measuring equipment was installed to the prototype logging the production of the PV modules and the power supply to the conveyor. To draw any conclusions of the performance of the prototype it is required to log data over a long time, at least a year. By doing so it is possible to verify the results of the simulations.
Place, publisher, year, edition, pages
2014. , 46 p.
IdentifiersURN: urn:nbn:se:ltu:diva-55888Local ID: cb1da5d2-bbee-4ba5-90da-af4bd94fcf28OAI: oai:DiVA.org:ltu-55888DiVA: diva2:1029272
Subject / course
Student thesis, at least 30 credits
Sustainable Energy Engineering, master's level
Validerat; 20141023 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved