Volvo Trucks in Umeå use large amounts of compressed air and the air compressors at Volvo use large amounts of energy every year. The majority of the energy supplied to the compressors goes to heat losses cooled to the Ume River and groundwater. The purpose of this project was to develop a new heat recovery system where a larger part of the compressor heat is used and various suggestions for optimizations on the compressed air system. Lack of digital control systems on the compressed air system has led to various operating problems and difficulties in diagnosing them while making optimizations difficult. The absence of logged data led to lack of various critical compressor data that instead had to be estimated with different calculation methods. The report resulted in a number of measures that were proposed, such as an investment in a variable speed drive compressor with heat recovery to the district heating system, various operating optimizations and a reworking of the current heat recovery system. The heat recovery systems showed to have great saving potential with a short payback period. The heat recovery systems that were developed in the project was to recycle heat from a new air compressor to the return line on the district heating at a station inside the factory and a heat exchange on three current compressors towards a nearby district heating line. It was thus possible to show significant reductions in the amount of purchased district heating and energy costs without affecting other processes. An outdated compressed air system showed higher future costs due to increased service costs and a future need for renovations on compressors. This means that Volvo probably would have reduced costs by investing in a new air compressor.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:umu-160431 |
| Date | January 2019 |
| Creators | Fjellstedt, Johan |
| Publisher | Umeå universitet, Institutionen för tillämpad fysik och elektronik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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