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Driftoptimering av kyl- och frysanläggning: En analys av en kaskadprocess med partiell förångning
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Studien är utförd åt Freezing Food Småland Öland AB. Syftet med undersökningen var att ge förslag på åtgärder som minskar anläggningens energibehov samt att beräkna återbetalningstid för åtgärder. Genom användningen av simuleringsprogramvara tillsammans med data från praktiska mätningar så testades olika förändringar i anläggningen.

Studien resulterade i förslag på en höjning av frysrumstemperaturen och temperaturen i LTB1. Dessa åtgärder höjer anläggningens köldfaktor och minskar energibehovet. Förslag för att få bukt på istillväxten är att isolera av komponenter så som rör och ventiler. Isolering ger en energibesparing och en minskad risk för korrosion. Genom belastningstester framkom det att kompressorerna arbetar ofördelaktigt så förslag på lämpliga driftområden togs fram för att öka verkningsgraden och minska underhållskostnaderna och energibehovet. Anläggningen visade sig vara väl dimensionerad mot transmissionsförluster men att golvvärmen står för en oproportionerligt stor del av förlusterna i förhållande till dess yta. 

Abstract [en]

The study is conducted for Freezing Food Småland Öland AB. The purpose of the study was to propose measures to decrease the facility’s energy demand and to calculate the payback time for these suggestions. By means of using simulation software along with data from practical measurements different configurations in the facility were tested.

The study resulted in suggestions consisting of an increase of the temperature in the freezing room and the temperature in LTB1.Those suggestions increases the facilities COP and decreases the energy consumption. Proposals to curb the ice growth are the insulation of components such as pipes and valves. Insulation results in a small decrease in energy demand but greatly increases the accessibility and also decreases the risk of corrosion. Through load tests conducted on the compressors it showed that the compressors were not driven in the optimal load range, suggestions were made for operation in a more favourable load range. Thus increasing the efficiency and cutting the maintenance costs. From the results it is shown that the facility is well built and dimensioned against thermal transmission. Though it turned out that the floor heating accounts for a disproportionate amount of the thermal transmission. 

Place, publisher, year, edition, pages
2016. , 27 p.
Keyword [en]
Energy optimization, Operational optimization, Cooling storage, Freezing storage, Freezing room, Blast freezer, Cooling circuit, Screw compressor, Coefficient of performance, COP, Industrial refrigeration
Keyword [sv]
Energioptimering, Driftoptimering, Kyllager, Fryslager, Frysrum, Frystunnel, Kylkrets, Skruvkompressor, Köldfaktor, Energibesparing
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-52367OAI: oai:DiVA.org:lnu-52367DiVA: diva2:925890
External cooperation
Freezing Food Småland Öland AB
Educational program
Marine Engineering Programme (4 years) with onboard practical training placement, 180 credits
Supervisors
Examiners
Available from: 2016-05-04 Created: 2016-05-03 Last updated: 2016-05-04Bibliographically approved

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Holmgren, RobinHallenberg, Dante
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CiteExportLink to record
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