Dissertations / Theses on the topic 'Energiförbrukning'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Energiförbrukning.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Fareby, Albin, and Kajsa Olofsson. "Energiförbrukning vid dataöverföring med LoRa : Datastorleken och överföringsfrekvensens ömsesidiga inverkan på energiförbrukningen." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Datateknik och informatik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-47441.
Full textThis project aims to research the energy consumption required to run a circuit using LoRa for wireless communication. The energy consumption is calculated by taking the independent variables for the data set, and the number of transmissions per day into account. The study aims to research which one of these parameters affects the energy consumption the most and what the most energy efficient ratio between them are. A measuring device was developed by programming a development board and installing it in a chassis. The development board (NUCLEO-L037R) has an attachable expansion board for LoRa-communication (SX1272MB2DAS LoRa RF). A code library was downloaded in order to run the board and then modified to suit the research. In the study, one experiment was performed in order to obtain the time required for a transmission, depending on the size of the data sets. The calculated time intervals were then used in a physical formula, to calculate the theoretical energy consumption for each case. The results show that increasing the number of transmissions per day requires more energy than increasing the size of the data set. The results of this study could be used as a complementary guide for making decisions regarding how data is going to be transmitted using LoRa as a means of communication. The study only investigated the energy consumption on the development board NUCLEO-L037RZ including the expansion board SX1272MB2DAS LoRa RF. Even so, the result should be applicable on other LoRa products as well.
Bohman, Lennart. "Energiförbrukning vid havspaddling." Thesis, Linnéuniversitetet, Institutionen för naturvetenskap, NV, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-11081.
Full textThe aim of this study was to examine energy consumption when sea kayaking. The energy consumption was examined at rest and at two different speeds (4 and 7 km/h respectively), first with an empty and then with a packed kayak (20 kg). Moreover, the kayaks’ passive drag in the water was measured in order to examine how this was influenced by the speed through the water. The study was implemented in a group of paddlers with even gender distribution but with varying age and experience. In the first part of the experiment, we measured the participants’ heart frequency, oxygen uptake and carbon dioxide production during gradually increased work load in a kayakergometer. For each test subject correlation curves were constructed from the recorded heart rate and oxygen uptake. Based on the persons heart rate during paddling, oxygen uptake was calculated using the individual regression equation which was calculated in the first part of the experiment. When paddling at 4 km/h with an unpacked kayak, the oxygen uptake was measured to 5 ml/kg/min. At 7 km/h, it increased significantly to 11.5 ml/kg/min (p< 0.05). Paddling with a packed kayak oxygen consumption increased to 6.5 ml/kg/min at 4 km/h and significantly to14.5 ml/kg/min at 7 km/h. If energy consumption is calculated on the basis of oxygen uptake for a person weighing 75 kg, at 4 km/h this corresponds to a consumption of 450 kJ (107.4 kcal/h) when kayaking with an unpacked kayak and 585 kJ (139.8 kcal/h) with a packed ditto. At 7 km/h, energy consumption was calculated to 1080 kJ (258 kcal/h) (empty kayak) and 1350 kJ (322 kcal/h) (packed kayak). The passive drag increased exponentially with increased speed.
Ståhl, Sanna. "Energiförbrukning på gårdsbiogasanläggningar." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10112.
Full textA farm biogas plant has several large internal energy consumers. Previous research has shown that the energy for only mixing in a biogas plant may reach 1% of the biogas energy content which is extremely high. A mixing study was performed where data specific stirring power (W/m3) and energy consumption (kWh/day) has been obtained from real cases and then compared against each other. Correlation between larger reactor volumes and higher energy consumption per day for agitation could be. While connections between smaller plants and higher specific stirring power (W/m3) could also be. A digester heating demand is theoretically at around 33% for thermophilic processes and 20% for mesophilic processes of the theoretical energy output for a plant with a digester of 750 m3. A planned facility with reactor volume of approximately 3000 m3 and specific stirring power at 22 W/m3, should have a higher electricity demand per year than 100 000 kWh/year.
Nilsson, Joakim, and Edison Gashi. "Energiförbrukning för Cisco 3560." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-12309.
Full textEriksson, Stephanopoulos Antonios. "Komfortkylsystems installationskostnader och energiförbrukning i kontor." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-58967.
Full textOn behalf of Creanova AB this master thesis has been implemented in the autumn 2010. The aim with the project was to analyze how installation and energy costs for comfort cooling in office buildings depends on different design conditions. The conditions that have been examined is particularly the design indoor temperature, but also sun protection in terms of louvers and blinds as well as LED lighting. All the varied parameters have been simulated in four different directions with both CAV (Constant Air Volume) systems with conventional baffle and VAV (Variable Air Volume) systems with active diffuser TTD-160 from Lindinvent. The calculations for the office have been simulated in climate simulation program IDA ICE 4.0. After that two different solutions were developed for the office, one with CAV ventilation and one with VAV ventilation. Finally installation cost of each simulation and its energy consumption was calculated. The calculations show that the installation costs for an office space will increase by about 50% when the design indoor temperature is lowered from 26 to 22 ° C for the CAV system with supply air baffle. The corresponding figure for the VAV system with inlet diffuser is about 40%. Energy costs for air conditioning and heating will increase by about 114% for the CAV system and approximately 127% for VAV solution in which the same design temperature drop is implemented. By attaching different types of sunscreen on the office window, the need for comfort cooling for offices with south, east, or west facade is greatly reduced, which is clearly reflected in the costs for both installation and energy. To attach sunscreen on offices with north facades are not necessary, because the solar radiation on north facades is already very low. The installation costs for the VAV solution has proven to be about 10-15% lower than the CAV solution with the same conditions and energy costs for the VAV solution is between 20-27% lower than for the CAV solution But designing VAV systems are not always appropriate, since the ducts and installations take up more space because of the ventilation ducts increased size. When very exclusive buildings are constructed the ventilation ducts increased shaft area may lead to that the lost rental income is greater than the savings that the lower energy consumption generates.
Danielson, Jenny. "Kostintag, energiförbrukning och kroppssammansättning hos orienterare." Thesis, Umeå universitet, Institutionen för kostvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-90333.
Full textAbstract Background Orienteering is an endurance sport where pace and intensity varies and differs from regular endurance running since it also includes hilly terrain and a cognitive component. The performance of orienteers can therefore be assumed to be more dependent on dietary composition than ordinary runners. There is currently insufficient research on body composition, energy expenditure and food intake of orienteers. Objective The aim of the study was to examine body composition, energy expenditure and dietary intake in orienteers and compare this with their needs and the recommendations and requirements for orienteers to perform optimally in their sport. Methods The study included 18 orienteers, 9 men and 9 women between 16 and 29 years, from just below the elite level to the elite level in orienteering. Body composition was investigated with Bodpod and bioimpedance. For three days, including two days of training and one day of rest the energy expenditure was investigated by activity monitors and an activity diary and dietary intake with a three-day weighed food record. Results The male participants had a body fat percentage of 11, 4 ± 4, 4 % and female at 26, 2 ±4, 5 %. Energy expenditure for male participants was 3804 ±451 kcal and for female participants 2963 ± 391 kcal. Energy intake was 3233 ±564 kcal for men and 2384 ± 428 kcal for women. Intake of protein was 1.6 g / kg body weight and intake of carbohydrates was 4.8 g / kg body weight. Average fat intake was 32 energy percent. The majority of participants had higher energy expenditure than their energy intake. Conclusion The study demonstrates a negative energy balance of the majority of participants. Many participants would be able to increase the intake of carbohydrates and fluids in order to optimize their performance. The amount of protein and fat was good in relation to the recommendations.
Hilberts, Samuel. "Energideklaration och energiförbrukning för småhus och flerbostadshus." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96303.
Full textEnergi börjar nuförtiden bli ett allt hetare samtalsämne, inte bara i Sverige utan i hela Europa. Inom EU har man tagit fram ett direktiv 2002/91/EG om byggnaders energiprestanda och genom detta ställt krav på sina medlemsländer att redovisa byggnaders energianvändning. I Sverige har det tagits fram en lag (SFS 2006:985) om energideklaration för byggnader som kräver att fastighetsägare ska redovisa vilken energianvändning som deras byggnader har. Viktigt att beakta är att denna lag inte omfattar alla byggnader och att det största undantaget gäller alla industribyggnader. Rapporten syftar till att bringa klarhet i vad den nya lagen om energideklaration för byggnader och dess tillhörande föreskrifter kommer att innebära i stort och för Riksbyggens del. Dessutom görs energiberäkningar vars syfte är att kunna jämföra Riksbyggens byggnader med de nya krav och normer som kommer. Utöver energideklarationens betydelse för byggnader och fastighetsägare samt energiberäkningar kommer Boverkets Byggregler (BBR) gällande energi att beaktas. Från och med 1:e juli i år kommer nya regler i BBR att träda i kraft och min uppgift har varit att utreda hur dessa påverkar kraven på effektiv energianvändning i nya byggnader. De energiberäkningar som gjorts har klart visat att Riksbyggens byggnader klarar de nya krav som finns med god marginal. Det finns ett uppenbart syfte med den nya lagen om energideklaration för byggnader och det är att få upp allmänhetens ögon för den ökande energianvändningen. Vid samtal med olika företag visar det sig att många känner till den nya lagen men att den upplevs som väldigt oklar då direktiv för hur den ska kunna följas först kommit på senare tid.
Huss, Linda, and Angelica Berggren. "ENERGIANVÄNDNING : Beräknad kontra verklig energiförbrukning i enfamiljshus." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Byggnadsteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-28038.
Full textSvensson, Mattias. "Analys av energiförbrukning, Akzo Nobel Functional Chemicals AB." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-59024.
Full textBucht, Caroline, and Joanna Korhonen. "Kommunikation och kunskap för minskad energiförbrukning under produktionsfasen." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Byggnadsteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-40205.
Full textPurpose: The study addresses energy consumption in the production phase and focuses on how communication about energy consumption can reduce it. Most focus is currently on reducing the energy consumption of a building during the operation phase, while there is a lack of focus on the energy consumption in the production phase. One of the biggest difficulties with sustainable development in the construction industry is that each project is unique, making it difficult for parties involved to learn from previous experiences and share knowledge between different projects and actors, thereby increasing the importance of a working communication. The aim of this study is therefore to reduce the environmental impact of the construction phase concerning energy consumption, by improving communication between parties involved. Method: This study is performed as a case study for a specific project at one of the largest construction and property development companies in Sweden. Methods to answer the questions of the study and gather empirical data are literature studies, document analysis and interviews with parties involved in the production phase. Findings: Since most of the communication is handled centrally and there is an uncertainty about whose responsibility the environmental issue is during a project, it becomes a personalized question and depending on the personal interest for the environment and sustainability is for the people involved. The results show that there is currently a lack of focus on the energy consumption during the production phase. The drying of the concrete structure is the phase with the highest energy consumption and therefore has the greatest potential for reducing its carbon dioxide emissions. Implications: The study shows that personal interest for the environment, prioritization and allocation of resources can reduce energy consumption during a project. By including this in the QHSE-coordinator's tasks, implies in addressing the issue and energy savings can be made. Limitations: The study is limited to major contractors and only studies the energy consumption from the work stages foundation, framing and lock up in the production phase of a site-built concrete frame. The study does not therefore consider the energy consumption of the temporary factory. Respondents to the interviews have been selected based on expertise and involvement in energy efficiency at the construction site.
Heijel, Marcus, Johan Lind, and Martin Svensson. "Energiförbrukning i bostadsrättsföreningar - Faktorerna bakom variationer i halländska bostadsrättsföreningar." Thesis, Halmstad University, School of Business and Engineering (SET), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-761.
Full textEnergiförbrukning är ett väldigt omdiskuterat ämne då den i hög grad är kopplad till den
globala uppvärmningen. Bostäder och lokaler står för cirka 35 procent av den totala
energianvändningen i Sverige. Fastigheter kan ha olika egenskaper vilket medför att
energiförbrukningen skiljer sig markant beroende på hur fastigheten är uppbyggd. Vår
problemformulering lyder:
– Vilka är de avgörande faktorerna som gör att energiförbrukningen i bostadsrättsföreningar
varierar?
Syftet med denna uppsats är beskriva samt förklara de mest betydande faktorer som påverkar
energiförbrukningen i bostadsrättsföreningar. Vi har använt oss av en kvalitativ ansats för att
besvara vår problemformulering. Sex bostadsrättsföreningar har studerats med olika
uppbyggnad och struktur för att få en så objektiv analys som möjligt. Vi har valt att intervjua
driftansvarig, förvaltare och ordförande i respektive bostadsrättsförening för att få så
uttömmande svar som möjligt. Vi har funnit ett flertal samband av de faktorer som studerats,
vilket har svarat på vår problemformulering i vår forskning. De största faktorerna som
påverkar energiförbrukningen kan indelas i två kategorier direkta och indirekta faktorer. De
direkta faktorerna är uppvärmningssystem, ventilation och klimatskärm och de indirekta
innefattar struktur, organisation och information. Sedan finns det även andra mindre faktorer
som påverkar men dessa har vi valt att inte belysa i denna uppsats. Resultatet som vi har
kommit fram till är att det finns vissa faktorer som påverkar mer än andra och ofta är det en
kombination av olika faktorer som ger den bästa lösningen för energieffektivisering. Exempel
som visar på detta är passivhusen som knappt behöver någon tillförd energi alls. Passivhusen
drivs enbart av värme från personer, elektriska apparater och instrålad sol dvs. hus utan
värmesystem. På detta sätt blir husen nästan självuppvärmda.
Al, agedi Bilal, and Maytham Ibrahim. "Energiförbrukning och utsläpp av koldioxid vid byggande av väg." Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-9492.
Full textMarkförstärkning i ett vägbygge kan göras på olika sätt. I detta examensarbete jämför vi två av dessa metoder, nämligen massutskiftningsmetoden och användning av kalkcementpelare ur energi- och miljösynpunkt. För att jämföra dessa två metoder togs fram ett excelbaserat räkneverktyg där resultatet av energiförbrukningen fås i kWh och koldioxidemissioner i ton CO2. Denna jämförelse gjordes för ett specifikt vägprojekt som använde massutskiftningsmetoden för vägunderbyggnaden. Det som ingick i beräkningen var schaktning, fyllning, krossning, sprängning, transporter och kalkcementpelare. För denna uträkning användes data från både entreprenörer som var med i projektet och företag som hade dokumenterade data.
Metoden som förbrukade minst energi och som släppte ut minst koldioxidemissioner var massutskiftningsmetoden. Det som gjorde att kalkcementpelare till en sämre metod var den höga energiförbrukningen som krävdes för tillverkningen av kalk och cement. Det som krävde mest energi i tillverkningsprocessen var ugnar där höga temperaturer krävdes.
Skillnaden mellan utskiftningsmetoden och kalkcementpelare i objektet var att i massutskiftningsmetoden krävdes urgrävningar för att schakta bort jordmaterial med dålig hållfasthet och ersätta det med bergmaterial med hög hållfasthet. I denna metod går energi åt till schaktning, fyllning och transport. Medan förstärkningsmetoden med kalkcementpelare förbrukar energi för tillverkning, transport och installation. Eftersom metoden går ut på att vägbyggnaden ska vila på pelarna genom att borra ner dessa i marken istället för att schakta bort stora volymer och transportera dem till fyllningen så är det lätt att tro att kalkcementpelare sparar energi genom att minska massförflyttning och långa transporter. Resultatet av detta examensarbete har visat motsatsen.
Jannung, Johan. "Undersökning av energiförbrukning och konceptutveckling av mer energisnåla frukostmaskiner." Thesis, KTH, Maskinkonstruktion (Inst.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99208.
Full textKarim, Ali A. J., and Abbas Mahmoudi. "En teoretisk studie i reducering av energiförbrukning i Irak." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18803.
Full textUppsatsnivå: C
Edvardsson, Ida, and Ida Martinsson. "Jämförelse mellan beräknad och verklig energiförbrukning på Östra Lugnet." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-53581.
Full textNilsson, Philip. "Energiförbrukning för spårväxelvärme : Före och efter installation av ÖVV." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70869.
Full textLundström, Jussara. "Energiförbrukning för olika stommaterial under produktionsfasen av ett flerbostadshus." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-132945.
Full textFor a long time the focus of energy efficiency in building constructions has mainly been focused on its operational phase, as previous studies show that the operational phase accounts for 85 percent of a building’s total energy consumption during its lifetime, estimated at 50 to 100 years, the production phase is estimated to account for 15 percent. By only accounting for the climate impact from buildings during the operational phase, has led to energy consumption shifting in phase, resulting in an increased share of the total energy distribution in the production phase. This thesis aims to highlight the issue of the energy consumption during the construction phase, by mapping how much energy is consumed on the spot in the production stage to build an apartment building located in Umeå. In this thesis three different framing materials has been examined and analyzed; in situ concrete, steel combined with precast concrete and wood. In order to implement the project, the main focus has been on a reference object, Kvarteret Sjörået in Tomtebo in Umeå, which includes three buildings of four floors each, where only one compartment of one of the buildings has been examined. The study of this thesis begins with determining the energy-consuming steps for each framing materials, followed by calculating the energy consumption of these frame materials. During the project contacts have been taken with various stakeholders from the construction industry in addition to simulations performed in the program TorkaS and a variety of adoption has been made. Regarding the amounts of material assumed consumption in this study a basis has been taken in the previous thesis Life cycle analysis with a focus on energy use during the manufacturing phase – a comparison of frame materials by Mi Von Ahn. The result obtained for the reference object shows that the difference in energy consumption between the studied frame materials is high during the production phase of the reference object. The result further shows that in situ concrete frame is the most energy consuming alternative during the construction phase due to need of large fans that is consuming a lot of energy. When it comes to prefabricated frame materials the energy consumption is largely due to the need for cranes where one important aspect is the weight of the elements. In addition cranes use electricity depending on the elements weight and depending on the lifting speed. Wood was most advantageous in this study, because of its light weight body. Important to note is that the results of this study are based on a specific reference object, which means that the results may be different depending on many factors, for example the choice of system limits.
Prins, Elisabeth. "Kartering och analys av energiförbrukning hos PM5 vid Edet Bruk." Thesis, University West, Department of Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-366.
Full textNilsson, Ann-Sofie, and Jonas Olsson. "Framtagning av nytt mätsystem för mätning av energiförbrukning i mikrovågsugnar." Thesis, Linköping University, Department of Science and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2052.
Full textThe report describes a measuring method for analysis of energy consumption measurement in microwave ovens. Concurrently that the awareness of the environment evolves the demands are growing for more power saving products. This is also counting within the Home Appliance business, which is Whirlpools business area. Whirlpool is therefore interested of launching microwave ovens with documented low power consumption. To be able to implement this, both asserted measuring equipment, that fulfils all demands, and a standard procedure is required. Asthis is a comparatively new business area within microwave oven production, there is no definite standard to follow. There is however a proposal developed by CENELEC.
The report describes the suggested measuring method and analyses and evaluates it. Proposal is also given on how to refine the measuring method and evolve it further. The developed measuring equipment is carefully described in the report. The software to the measuring equipment has been developed using National Instrument’s LabVIEW®. LabVIEW® is a powerful and comparatively easy-to-use tool often used when developing measuring systems. The developed hardware’s main task is to detect which heating element (grill, forced air, microwaves) that is active in the microwave oven. This is very useful when verifying programs for cooking in the oven.
Eventually it is the authors hope that the system will be used within Whirlpool, and also be developed further.
Arvidsson, Erik. "Energiförbrukning för putsade, odränerade träregelväggar i fuktigt respektive torrt tillstånd." Thesis, Örebro University, School of Science and Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-7861.
Full textIn recent years, moisture damages have been noticed in rendered, undrained stud walls. The design is built on the principle one-stage tightening which means that there is no air gap in the construction. The damages have occurred when water has permeated through the rendering in leaking connections and fittings for windows, doors, canopies, balconies, terraces and awnings. Behind the plaster carrier, which consists of either polystyrene or rigid mineral wool, plasterboard has often been used as a wind protection barrier. In many cases the wind protection barrier and the underlying wooden studs have been exposed to mould and in some cases even rot. It has been shown that damp in the structure is difficult to dry out.
The aim of the thesis has been to examine how the energy consumption is affected when this type of construction is damp, partly because energy is required to dry up damp, partly because the insulation ability for a material decreases when it is affected by moisture.
Previous research and relevant literature has been used in this thesis, to provide: A comprehensive picture of the problem, an explanation for the calculations used and an understanding of the conclusions drawn.
The energy consumption has been calculated for 1 m2 wall area on two types of wall designs. The calculations have been performed in both dry and damp condition. To calculate the energy consumption in damp condition, three different types of calculation models have been used in three different ways. Since no measurements have been made, the calculations are to some extent based on assumed values.
The amount of damp that have entered the structure has, according to the calculation models used, been shown to produce small differences in energy consumption compared to the dry structure. The main problem for these types of walls seems instead to be the growth of microorganisms. Nevertheless, the microorganisms seem not to have affected the indoor environment in any significant manner.
Tjällskog, David. "Optimering av ultraljudssändare- och mottagare avseende räckvidd, strålningsvinkel och energiförbrukning." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-90581.
Full textEmbedded Systems Lab vid Umeå universitet är involverade i ett forskningsprojekt där syftet är att undersöka kors beteende då de utfordras inne i ett stall. Varje ko behöver kunna positions-bestämmas med en noggrannhet på ca 50 cm, och eftersom GPS-teknik inte fungerar tillfreds-ställande i inomhusmiljöer behöver ett ”inomhus positioneringssystem” utvecklas. Embedded Systems Lab har tagit fram ett system som använder IR-ljus och radio för att bestämma positionen för en ”rörlig enhet” i ett rum, men systemet kräver omfattande infrastruktur och är dessutom dyrt, varför ett alternativt system som använder ultraljud och radio utreds. I detta examensarbete undersöks ultraljudssändares- och mottagares räckvidd, strålningsvinkel och strömförbrukning som en förstudie inför utvecklingen av ett inomhus positioneringssystem med ultraljud. Tre olika typer av drivsteg för sändaren har testats och olika förstärkning på mottagaren. I rapporten beskrivs även effekten av antalet utsända ultraljudscykler, påverkan av ”skuggning” av ultraljudssignalen samt skillnader mellan olika frekvenser på ultraljudet.
Karim, Mokhalad. "MÄTUTRUSTNING OCH METODIK FÖR MÄTNING AV ENERGIFÖRBRUKNING PÅ BATTERIDRIVNA STRÖMSNÅLA APPARATER." Thesis, Jönköping University, JTH, Computer and Electrical Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-12214.
Full textDetta examensarbete har utförts på Saab Training Systems (STS) AB i Huskvarna. Arbetet handlar om metodik och utrustning för mätning av ström och energiförbrukning på Saabs batteridrivna apparater, nämligen SAT och SAAD.
Nuvarande mätutrustning klarar inte av de tekniska kraven som STS ställer. Därför behövs det ett instrument eller en metod som generellt kan mäta energiförbrukningen på Saabs batteridrivna enheter. Problemet är att strömmen till apparaterna varierar kraftigt från några mikroampere till flera hundra milliampere i en väldigt kort tidsperiod.
Arbetet har genomförts som en teoretisk utredning men innehåller också praktiska mätningar på Saabs SAT och SAAD för att undersöka vilka svårigheter som kan uppstå vid mätning. Dessutom har två förslag på lösningar presenterats. Det mest lovande av förslagen är baserat på en logaritmisk förstärkare. Detta förslag har även verifierats praktiskt med ett testkort (prototyp).
Testkretskortet kan delas upp i två delar. Den första delen innehåller en linjär förstärkare som känner av strömmen som går igenom en avkänningsresistor. Test av den delen av kortet visade att den fungerade enligt specifikationen, och det var att förstärka signalen med den förstärkningsfaktor som bestämts och att kunna mäta med oscilloskop på plussidan av testobjektet.
Den andra delen innehåller en logaritmisk förstärkare som komprimerar stordynamiksignaler. Test av denna del av kortet visade att förstärkaren var olämplig för ändamålet, eftersom den inte klarade av att förstärka små signaler.
Idén att använda logaritmisk förstärkare är dock ett bra alternativ, givet att en lämplig förstärkare används.
Kinnunen, Aleksi, and Emil Ljungemyr. "Modell för energiåtgång vid cykling : Cykelvägars geometri och påverkan påcyklistens energiförbrukning." Thesis, KTH, Transportplanering, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275761.
Full textSandberg, Erika, and Teodor Tapper. "Energianalys komplett biogassystem : En sammanställande analys av en gårdsbaserad biogasanläggnings energiförbrukning." Thesis, KTH, Energiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276429.
Full textCommercial biogas facilities often tend to have a relative low efficiency and low profitability, resulting in the worldwide biogas potential not being utilized to its full extent. Consequently, since autumn 2014, Innovationsverket in Gamelby has in collaboration with KTH analysed the potential of a farm-based biogas system compared to the energy efficiency of today’s equivalents. The company International Micro Biogas AB was started, and patents has been granted. This essay aims to conduct a comprehensive energy analysis of a small-scale farm-based biogas facility based on its main components, which has been performed by evaluating preceding master theses and project assignments conducted by the collaboration between Innovationsverket and KTH, with the goal of compiling information from these and creating the comprehensive system. The energy data of the main components were analysed, and calculations were conducted in Microsoft Excel. An Excel spreadsheet were one can insert essential farm data to calculate the yearly energy expenditure of a biogas facility has been created. This study was conducted with the intention of utilizing 200 cows as the essential data and the collection of the energy components output resulted in a yearly energy consumption of 385 MWh. The new farm-based biogas facility has displayed great potential, from an energy consumption perspective, and could with high probability become self-sufficient if an optimization of the system were conducted.
Berggrén, Erik, and Edward Lunqe. "Byggfuktens inverkan på energiförbrukning : En studie i energiförluster på grund av byggfukt." Thesis, KTH, Byggvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174276.
Full textEnergy efficiency and low energy houses are today important factors within the building sector. What’s often forgotten, and with little or no research available, is how building moisture affect energy consumption. The intention of the thesis is to increase the knowledge of building moistures consequence’s by investigating how large the energy is to dehydrate concrete structures and also to investigate if it should be taken in account by environmental certification when buildings are certified. All material and medium strives to be in moisture equilibrium with its environment. For building materials to dehydrate into equilibrium with its environment evaporation is required. Because evaporation makes the ambient temperature lower the energy consumption for heating increases. In the thesis the moisture calculation software’s KFX03 and WUFI Pro 5.3 are used to calculate the water quantity of dehydration and when it occurs in concrete structures. A fact sheet was programmed, in Excel, for fast and simple energy calculations of dehydration in a building. To estimate the quantity of heated concrete in new buildings three newly produced buildings where studied. The result shows that the energy for dehydrations increased a buildings heating by approximately 5 %, correspondent to roughly 2.5 years of consumption. The work indicates that building moisture has a relatively high impact on a buildings heating, when taking the different condition during construction and living in consideration. Therefore the current environment and energy certification systems should in greater regards focus on energy consumption during construction. To be able to better answer in which extent the drying of building moisture affects energy consumption comparisons should be done in concrete with different water-cement ratio and energy calculation to estimate energy losses during construction. Thus to answer how big effect a buildings construction phase has on the environment and thereby how big significance this phase should have on environment certifications.
Henriksson, Lisa. "Gräs från våtmark som additiv i bränslepellets : Effekter på pelletskvalitet och energiförbrukning." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-47122.
Full textDen globala uppvärmningen är en påverkande faktor gällande dagens energiutveckling. Europeiska unionens krav på mer förnyelsebar energi är därtill en anledning till det ökade intresset för bioenergi. Pelletsmarknaden har sjufaldigt ökat globalt det senaste decenniet med tidvis ansträngd resursmarknad som följd. Träspån anses komma bli en bristvara i framtiden och aktörer ser sig redan om efter alternativa råvaror. Olika typer av gräs som till exempel rörflen har visat sig ha stor potential. I denna studie testas ett våtmarksgräs som additiv i bränslepellets, med 0,5, 1, 1,5, och 1,9% inblandning. Pelletsproduktion samt tester gjordes i pilotanläggningen på Karlstads universitet, avdelningen för miljö-, och energisystem. Energiförbrukning, fukthalt, hållfasthet och bulkdensitet är några av de variabler som testades. Pellets med våtmarksgräs jämfördes med ett referensprov med endast granspån samt ett prov med ett vanligt förekommande additiv (potatisstärkelse 1%). Kvalitén på pellets bedömdes utifrån den europeiska standarden. Resultatet visade att den specifika elförbrukningen minskade med 14% när 2% våtmarksgräs adderades, en del av den minskningen kan bero på det ökade produktionsflödet jämfört med referensprovet. De positiva effekter på specifik elförbrukning som 1% potatisstärkelse resulterade i, visade våtmarksgräs 1% liknande effekt. Detta indikerar smörjande egenskaper hos våtmarksgräset. En orsak kan vara den höga halt extrakt, såsom vaxer, som många örtartade växter består av. Dessa har i tidigare studier setts minska friktionen i pressen vilket reducerar elförbrukningen. Pellets med våtmarksgräs som additiv klarade inte de Europeiska kraven på hållfasthet. En låg fukthalt och närvaron av extrakt kan ha medfört svaga gränslager i pellets och därmed påverkat hållfastheten negativt. En svag trend visade på förbättring av hållfastheten vid högre andelar våtmarksgräs. Den varierande storleken på partiklar som sampelleteras kan ha bidragit till detta. Fukthalten är godkänd enligt den europeiska standarden men under det optimala 8%. Detta trots en relativt hög uppmätt fukthalt innan pressen. En högre fukthalt i samband med pressning hade troligen höjt kvaliteten generellt. Förslag till vidare studier är att utföra tester med större variation på mängden våtmarksgräs, för att få ett tydligare resultat. Extraktivens beteende i samband med andra varierande parametrar som exempelvis fukthalt, borde studeras närmare för att kunna bedöma våtmarksgräsets möjligheter som additiv. För en hållbar utveckling av förnybar energi är det viktigt att säkerställa den framtida råvarumarknaden för pellets. Fortsatta studier bör göras för att bidra till utvecklingen av alternativa råvaror i samband med pelletsproduktion.
Eriksson, Elin, and Emelie Hansson. "Minskning av energiförbrukningen : I ett flerbostadshus från miljonprogrammet." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Byggnadsteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-14218.
Full textPehrson, Robert. "Förslag till nytt energimätningssystem på Volvo Aero Corporation i Trollhättan." Thesis, University West, Department of Technology, Mathematics and Computer Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-367.
Full textHedkvist, Karin, and Gegerfelt Rebecca von. "Passivhuset i det långa loppet : - hur påverkar brukarens kunskap energiförbrukningen?" Thesis, KTH, Byggvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102375.
Full textWistrand, Matilda. "Byggnadsutformningens inverkan på energianalysen : En jämförande utvärdering av två energisimuleringsprogram." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-173450.
Full textMalmgren, My, and Nils Lindvall. "Hållbar produktion : En analys av energiförbrukning och avfall för minskad miljöpåverkan inom växellådsmontering." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79174.
Full textScania is a part of the Traton Group and is world leading within sustainable transports. The master thesis was performed at the transmission assembly at Scania in Södertälje, where the headquarters for research and development also is located. In Södertälje, production units for chassi, engine, and transmission are located. At Scania's transmission assembly gearboxes and axles are assembled, tested and painted before leaving the area. The project focused on gearbox assembly and the related equipment and processes. Scania's transmission assembly faces several challenges connected to the future and in order to continue their vision of being the leader within sustainable transports, new steps needs to be taken towards a more sustainable production environment. The project aims to look over the production conditions and equipment of the transmission assembly and how these can be improved regarding sustainability. By finding areas with high environmental impact and energy consumption, solutions can be developed and recommendations can be made. If implemented, this would contribute to a reduction in the environmental impact of the transmission assembly. The project began with a theoretical reference frame. The theoretical reference frame included theory and information regarding the project's purpose and the areas of investigation. The theoretical reference frame focused on sustainable development, environmental impact as well as energy and waste. Thereon, a current state analysis was conducted in order to identify the most critical areas of investigation from a sustainability perspective. The most critical areas of investigation consisted of heat and electricity consumption as well as energy recovery of non-hazardous waste. In order to identify relevant solutions to the critical areas, a literature study was conducted. The results from the literature study was analyzed with respect to ecological and economic sustainability. The solutions were compared via a decision matrix to produce a final recommendation. The decision matrix that was used was based on ecological and economic sustainability. In the matrix, the different solutions were compared with regards to carbon dioxide equivalents from an ecological perspective and with regards to the payback time from an economic perspective. The solution that was presented as the final recommendation from an energy perspective was sensible heat storage. The final recommendation in order to reduce the environmental impact from waste was a ''right from me'' system.
Paramio, Emilio, and Pontus Erstrand. "UNDERSÖKNING AV ENERGIFÖRBRUKNING I ETT FLERBOSTADSPASSIVHUS : En fallstudie på ETC hyreshus i Västerås." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-49591.
Full textWong, Arne. "Sojamjöl som tillsats vid produktion av träpellets : Effekt på pelletskvalitet, miljöförstöring och energiförbrukning." Thesis, Karlstads universitet, Fakulteten för teknik- och naturvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-28793.
Full textKlar, Henrik. "Energideklarationen : Uppfyller energideklarationen sitt syfte?" Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-220902.
Full textCarlsson, Emil, and Elin Svensson. "Skillnad i energiförbrukning vid byte från CAV-system till VAV-system i en kontorsbyggnad." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-35635.
Full textSainio, Berntsson Petter, and Adam Ahlgren. "En studie av två olika 32-bitars adderarstrukturer : Kompromisser mellan hastighet, energiförbrukning och area." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Data- och elektroteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31271.
Full textKillström, Karolina, and Gustav Mossberg. "Funktionell kapacitet hos barn med övervikt i relation till kroppssammansättning, energiförbrukning och självskattade överviktsproblem." Thesis, Uppsala universitet, Fysioterapi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-373642.
Full textBackground: Overweight is an increasing problem in today’s society. Approximately 20-25% of all 10-year old’s in Sweden are considered overweight and 3% are considered obese. There are few studies that show how the physical capacity in children with overweight can affect their perception of the overweight as an issue. Aim: The aim of this study was to investigate the correlation between physical capacity, energy cost, body composition and the child’s rating of their overweight as a problem Method: Retrospective study of data from admittance tests at Akademiska barnsjukhuset. Regression analysis of variables to study correlation. Subjects aged 7-17 with available data from Six-minute walk test, Physiological cost index, caliper measurements and rating of overweight as a problem. 58 subjects were studied. Results: There was no correlation between physical capacity, the child’s rating of their overweight as a problem and energy cost. A negative correlation was found between physical fitness and the body fat percentage (r=-0,55. p=0,03). Conclusion: The correlation between physical capacity and body fat percentage is consistent with previous studies. Other methods should be considered in future studies to better understand the underlying factors of the children’s rating of their overweight as a problem.
Christopher, Magnusson. "Förbättrat inomhusklimat med lägre energiförbrukning i öppet kontorslandskap : Ventilationens påverkan på inomhusklimatet och termisk komfort." Thesis, Högskolan i Gävle, Avdelningen för byggnadsteknik, energisystem och miljövetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30414.
Full textFinné, Hans, and Christer Sjöberg. "Stig-Helmer vs Gunde Svan : en studie om energiförbrukningen vid turåkning på skidor." Thesis, Swedish School of Sport and Health Sciences, GIH, Department of Sport and Health Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:gih:diva-268.
Full textSyfte och frågeställningar
Syftet med studien var att undersöka energiförbrukningen under en veckas turåkning i de svenska fjällen. För att få svar på syftet används frågeställningarna:
- Skiljer sig den aeroba energiförbrukningen vid turåkning mellan vana respektive ovana skidåkare?
- Skiljer sig den aeroba energiförbrukningen vid turåkning mellan kvinnor och män?
Metod
För att ta reda på hur mycket energi som förbrukas vid arbete användes mätning med pulsklockor då detta är möjligt att genomföra i fjällmiljö. Den metod som i allmänhet används för beräkning av energiförbrukning vid arbete är mätning av syreupptagningen. Under en fjälltur är det emellertid inte praktiskt möjligt att mäta syreupptagningen. För att lösa detta problem utrustade vi samtliga försökspersoner med pulsklockor utifrån vetskapen att hjärtfrekvensen under arbete med stora muskelgrupper är approximativt linjärt proportionell mot syreupptagningen.
Förhållandet mellan hjärtfrekvens och syreupptagning är individuellt och bestämdes på laboratorium. Försökspersonerna genomförde därför ett kombinerat submaximalt och maximalt cykeltest på Laboratoriet för tillämpad idrottsvetenskap på GIH före fjällturen.
I studien deltog 21 studenter från GIH, 10 kvinnor och 11 män. Medelåldern var 29,0 år, medelvikten 75,1 kg och medellängden 176,7 cm. Försökspersonerna delades in efter vana (11 st) och ovana (10 st).
Resultat
Som mått på energiförbrukningen används i studien den relativa syreupptagningen, d v s hur stor del av maximala syreupptagningsförmågan som utnyttjas.
Medelvärdet för energiförbrukningen för de vana skidåkarna var 34,3 % ± 6,4 % och för de ovana 41,7 % ± 8,8 %. För kvinnor var medelvärdet 42,6 % ± 6,5 % och för män 34,3 % ±8,2 %.
Slutsats
Studien visar att det finns tendenser till skillnader i energiförbrukning beroende på skidvana och kön.
Andersson, Camilla, and Helen Gunnarsson. "Klimatpåverkan vid vägbyggnad -beroende av vald konstruktion." Thesis, Halmstad University, School of Business and Engineering (SET), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2609.
Full textIt’s a fact that the climate is affected by the vehicle that runs on the worlds roads. But the
construction of the road itself is rarely thought of as a climate threat. Svevia and the Swedish road
administration have opposite views of how the construction of roads should be carried thru. It’s
the difference between those two construction methods that is the base in our thesis.
The amount of energy use or the emissions are not analyzed for neither the Swedish road
administrations nor Svevias construction models. Our thesis has compared these two models of
constructing a road to evaluate what affects the climate the least. In other words which material
and which construction model that is best to use to reduce the impact on the climate.
We have calculated the total amount of carbon dioxide and energy use for road models in different
traffic classes. To do this we designed a calculation tool that calculates on the total amount of
MWh used and the total amount of tons carbon dioxide emitted during the construction of a road.
This calculation tool could even in the future be used to calculate energy use and emissions from
new types of construction models.
The results for the construction models we calculated is that Svevias construction models have a
tendency to have some less emissions of carbon dioxide and demand somewhat less energy than
the Swedish road administration construction models. A difference also shows between different
traffic classes. Traffic class low gives considerably fewer emissions and demands less energy use
than traffic class high.
Hall, Axel. "Energioptimering av F21s restaurangbyggnad." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66634.
Full textLagerstedt, Linda. "Passive Houses - a study in why it is not built more." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-102750.
Full textDaka, Festim, and Stefan Trinh. "Mobilapplikationer : användarens syn på energiförbrukningen." Thesis, Högskolan i Borås, Institutionen Handels- och IT-högskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17408.
Full textJohansson, Emelie. "Energideklarationen, vinst eller förlust för ägare av äldre småhus?" Thesis, Växjö University, School of Technology and Design, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1540.
Full textDen nya lagen (SFS 2006:985) om energideklarering av bostäder trädde i kraft den 1 oktober 2006.
I denna deklaration ska byggnaders energiförbrukning anges och vilka åtgärder som rekommenderas för att minska byggnadens energianvändning. Vad händer då med äldre hus, som har dåligt isolerade väggar, tak, grund och i många fall även äldre fönster som inte på långa vägar kommer upp i dagens energisparande krav.
I äldre hus är det främst transmissionsförlusterna som står för energiåtgången och i denna rapport görs beräkningar för ett hus byggt 1959 i Växjö. I rapporten framgår det vad man tjänar på att tilläggsisolera och byta fönster samt hur många år det tar innan man har tjänat in på förbättringen av klimatskalet. Det ges även en inblick i vad man bör tänka på om man tilläggsisolerar med avseende på kondensrisk inne i byggnadsdelarna.
October 1st, 2006 a new law (SFS 2006:985) was given effect. The purpose of this law is to confirm a buildings’ specific energy consumption by showing an energy declaration. The declaration shows how much energy the specific building consume and what kind of measures that can be recommended to reduce the energy consumption.
In this diploma work, Ihave tried to answer the question: What happens to older buildings that have a high transmission loss through walls, attic and foundation caused by thin insulation and bad windows?
The calculations for this report are based on a dwelling house build in 1959. The main task has been to find out what the cost will be and how much money the owner will save by following the recommendations in the report – that is to add insulation material to the construction and to replace the windows.
It has to be taken into consideration before making any changes to the house that there might be an increase in humidity in sections of the construction if you make the climate shell thicker and more compact.
Börjeson, Simon, and Philippe Ghawi. "Energieffektiv Linjesjöfart Till Och Från Gotland." Thesis, KTH, Marina system, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102082.
Full textReje, Alexandra, and Alexander Renaudin. "Elanvändningen av Twitch : Hur mycket energi behövs för att överföra data under en stream?" Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277953.
Full textWith the growth of e-sport and online gaming, it has become increasingly popular to watch streaming of computer games. As streaming requires large amounts of data to be transferred, there is a cost of energy which has been relatively unexplored in academia. The purpose of this study is to investigate the use of electricity in networks caused by streaming. Focusing on the platform Twitch and the game League of Legends, measurements of data usage were carried out for different resolutions available to the viewer. These measurements were then converted to effect with the help of different estimations of the energy consumption in networks as well as the analysis of these estimations that has been done in existing scholarly work. The study finds that energy usage in networks has the same order of magnitude as the average electricity consumption of a user’s unit and network equipment. Furthermore, existing gaps in knowledge were demonstrated, therefore, future research can lead to better estimations and a more holistic view of the energy consumption of streaming.
Arlestrand, Oscar. "Energieffektivisering av kvalmgasåtervinning vid Barilla i Filipstad : Energikartläggning och åtgärdsförslag för en lägre energiförbrukning på Västra fabriken." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36311.
Full textThe EU aims to have a 20% lower power consumption compared to the forecasted usage by 2020 (EU-upplysningen 2014). A company that strives to reduce its power consumption is Barilla in Filipstad who conducts a bakery industry where Wasa crisp bread is manufactured. The baking stage is usually where most energy is required for bakery industries and could account for 66% of the total energy usage (Therkelsen et. al in 2014). To reduce this energy usage, Barilla uses a heat recovery system which extracts some of the energy in the fume gases[1] which are sucked out of the ovens in the baking step. This is accomplished by showering the hot gases with a colder fluid in a scrubber, which then heats up and can be transferred by a heat exchanger to the local heating systems at the factory. The extracted energy replaces energy needs from the plant's electric boiler or oil furnaces. They call this process fume gas recycling and it provides a major part of the annual energy demand. If it was possible to obtain more energy from the fume gases before they leave the chimneys, a more sustainable production of bread be could be achieved due to the lower energy usage of both oil and electricity. The objective of this study was to investigate whether the fume gas recycling on two of the plant's production lines work can be more efficient from an energy and environmental point of view. The results of the study show that there are several measures that would allow the fume gas recycling to give more energy compared to the current configuration. This would mean lower operating costs for Barilla but also a reduction of fuel demands and carbon emissions seen from a broader energy perspective. By introducing a heat exchanger between the scrubber water at production line 18 and the local heating system VS6, operating cost would be reduced with 1488 kSEK/year. If account is taken to the amount of oil that Barilla doesn’t need to burn and if the released electricity that is no longer required is seen as electricity at the margin. A total of 3765 MWh fuel/year and 1261 tonnes CO2/year could be reduced with this measure. By using the present value method the lifetime cost was calculated to 18,27 MSEK. This means that investment costs should be less than this value in order to provide greater or equal revenue than expenditure. The study was done by conducting a survey of all energy and mass transport that the two fume gas recycling systems include. A dynamic model was created based on these balances by using SIMULINK software. The model was configured so that the calculated energy needs from electricity and oil furnaces was the same as the statistics on energy use from 2014. The capability to simulate the effects of introducing seven different individual actions and six combinations of these were also added to this model. The study illustrates that there are good investment opportunities in order to achieve a more sustainable production of bread. Sensitivity analyses that were implemented in the study show, however, that the validity of the results is affected by a majority of the evaluated data. Input data in the form of averages based on logged values and more information about the components used in the system are required to obtain results that are to be considered more precise than educated guesses. [1] Fume gases is a generic term for the water vapor that is driven out, the air that is used to carry the water vapour and the carbon dioxide produced during the baking process.
Karlsson, Ida, and Malin Kelemit. "Utveckling av regler för bedömning av Energisparutmaningen." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-19428.
Full textCarlsson, Johan. "Androidapplikationer : Effektivisering ur ett energiperspektiv." Thesis, Högskolan i Skövde, Institutionen för kommunikation och information, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5033.
Full textEriksson, Emelie. "Resursanvändning vid snötillverkning : En jämförelse av energi- och vattenförbrukningen vid snötillverkning med olika snökanoner." Thesis, Mittuniversitetet, Institutionen för teknik och hållbar utveckling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-25538.
Full text