The smelting process at Sapa Profiler AB in Sjunnen generates large quantities of waste heat which is absorbed by the cooling water when the aluminum is cooled down. This paper is the result of a Master’s Degree Project aiming to present the conditions for recycling the waste heat. The cooling water absorbs the heat from the aluminum at an average rate of 600 kW and the paper shows that it can be used to replace electrical power consumption for heating the production plant’s facilities. The total savings potential comes to 464 000 SEK/year which represents a yearly reduction of 10-420 tons in CO2 emissions. Measures were taken already during the ongoing project in order to improve the possibilities of recycling the waste heat, which is suffering from discontinuous flows and low temperatures. In the paper a model is presented of how relatively high temperatures and continuous flows can be attained with the help of a warm water tank. Once he continuous flow is created, the waste heat can be exchanged to a separate flow which serves to transport the waste heat to the local heat distribution systems. Despite the significant savings potential, the necessary investment of 3 650 000 SEK makes for a pay-back time of at least eight years.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:liu-67641 |
| Date | January 2011 |
| Creators | Hallberg, Björn |
| Publisher | Linköpings universitet, Energisystem |
| 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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