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Ljudreducering av värmepump
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design.
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design.
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design.
2008 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

This degree project handles acoustic measurements of the heat pump EcoAir 107, made by Enertech CTC AB. The sound from the three sound sources of the heat pump, fan, compressor and four way valve, have been measured to find out how they affect the total sound level of the product.

Measures to attenuate the sound level have been developed and tested. By comparing these with the sound of the heat pump, in its original state, we have found out the measures which have best effects.

The best attenuating measures came to be: taped openings and holes around the compressor space, isolating the top and the bottom of the whole construction, support of the fan bottom part and shielding of the sound source with a screen at a distance of 110 mm

These measures have been tested together and an average attenuation of the total sound level with 3,9 dB have been accomplished. In the front of the fan where the continuous sound is the strongest, the attenuation was 4,7 dB.

This project is meant to be used as a guide by Enertech CTC AB:s during their future developing process.

Abstract [sv]

Detta examensarbete behandlar akustiska undersökningar på luftvärmepumpen EcoAir 107 från Enertech CTC AB. Ljudbilden över värmepumpens tre ljudkällor, fläkt, kompressor och fyrvägsventil, har mätts upp för att se hur dessa påverkar produktens totala ljudnivå. Åtgärder för att försöka dämpa ljudnivån har sedan tagits fram och testats. Genom att jämföra dessa med ljudbilden på värmepumpen i standardutförande har vi kommit fram till de åtgärder som fungerar bäst.

De bästa dämpningsåtgärderna visade sig vara: Tejpade lister och hål runt kompressorutrymmet, isolering i tak och botten av hela konstruktionen, stadgning av fläktutrymmets bottendel och avskärmning av ljudkällan med skärm på 110 mm avstånd.

Dessa åtgärder har testats tillsammans och en genomsnittlig sänkning på totala ljudnivån med 3,9 dB har åstadkommits. Fläktljudet rakt framifrån, som är det starkaste ihållande ljudet från värmepumpen, sänktes med 4,7 dB.

Detta arbete är tänkt att användas som hjälp vid Enertech CTC AB:s framtida utvecklingsarbete.

Place, publisher, year, edition, pages
2008. , p. 52
Keywords [en]
acoustics, heat pump, Sound, sound reduction, sound attenuation, Enertech CTC AB
Keywords [sv]
Ljud, ljudreducering, ljuddämpning, Enertech CTC AB, akustik, värmepump
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:vxu:diva-2114OAI: oai:DiVA.org:vxu-2114DiVA, id: diva2:206009
Uppsok
teknik
Supervisors
Examiners
Available from: 2008-06-12 Created: 2008-06-12 Last updated: 2010-03-10Bibliographically approved

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CiteExportLink to record
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