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Ackumulering av vattenburen kyla: Toppeffektsreduktion i kylanläggningar
University of Borås, Faculty of Textiles, Engineering and Business.
2014 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Liquid storage of cold : Reduction of peak cooling power in cooling applications (English)
Abstract [sv]

Kylanläggningar som förser kylabonnenter med kyla har många gånger problem medtoppeffekter. Dessa är kortvariga kylbehov som fordrar betydligt högre kyleffekter är normaltoch inträffar bland annat vid höga utetemperaturer. Installerade kylanläggningar är sällandimensionerade för att klara toppeffekter. Då toppeffekter inträffar kan t.ex. innertemperaturerhos en kylabonnent med komfortkyla därför stiga till oacceptabla nivåer. Detta examensarbetevisar att det är möjligt att konstruera kyllager med flytande vatten som kan medföra enminskning av fast årskostnad för kylanläggningar med fjärrkyla, eller undvika att installeradeffekt behöver utökas i kylanläggningar med egna kylmaskiner. Detta kan leda till möjligavinster ur miljö- och ekonomiaspekter. Detta är möjligt genom att kylenergin som behövsunder dygnet i förhand ackumuleras under tidpunkter då kylbehovet är lägre än denkylproducerande enhetens installerade effekt.

Abstract [en]

Chiller plants that provide loads with cooling are commonly exposed to cooling power peaks.These are short cooling demands that require significantly higher cooling powers thannormally and usually occur during high outdoor temperatures. Existing plants are rarelydimensioned to handle such high, short lived cooling demands. When cooling power needspeaks indoor temperature, for example in a comfort cooling system, can rise to unacceptablelevels. This thesis shows that it is possible to construct a cold storage for liquid water thatprovides the ability of decreasing yearly fixed cost for plants provided by district cooling or toavoid the need of increasing installed cooling power capacity in plants with local chillerswhile creating possible environmental- and economical profits. This is possible due to storingof cooling energy needed for the upcoming day during times of the present day when coolingneeds are lower than the cold generating units installed power.

Place, publisher, year, edition, pages
2014.
Keyword [sv]
Ackumulering av kyla, toppeffektsreduktion, fjärrkyla, korttidslagring av kyla, termiska lager, kylanläggningar
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hb:diva-231OAI: oai:DiVA.org:hb-231DiVA: diva2:825350
Subject / course
Energiteknik
Uppsok
Technology
Available from: 2015-07-03 Created: 2015-06-23 Last updated: 2015-07-03Bibliographically approved

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