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Academic literature on the topic 'Energianalys'
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Dissertations / Theses on the topic "Energianalys"
Bengtsson, Conny. "Energianalys av luftbehandling." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-15234.
Full textElectricity consumption for ventilation has increased by 40% since 1990 in Sweden. Ventilation is an environmental villain since inquiries indicates that the electricity consumption for ventilation system fans can be much reduced. Reduction of electricity consumption for ventilation purposes can be achieved through e.g. the exchange of fan motors to EC motors or to fans with backward curved blades and direct drive. Such measures can provide reduced power consumption by up to 50 % in some applications. The ventilation fans in Sweden consume 12.3 TWh each year. Today Sweden has 175 000 ventilation systems with too high consumption of electricity and no heat recycling. According to the Swedish Energy Agency the ventilation sector has a large potential for savings and the energy consumption for ventilation could be lowered by 30 % (3,5 TWh), which roughly corresponds to the total annual wind power production in Sweden. The Analytical tool developed in this thesis work is designed to be user friendly and is thought to be an aid when evaluating functionality and efficiency in air treatment system. The tool analyzes data from measurements and produces key ratios which are then compared with given key ratios and standard guidelines. The Analysis tool was tested on one reference object and functioned as intended, but may at this stage be considered as a prototype that can be further developed. Specific training will be required before using the analysis tool with consideration to electrical safety and accuracy of measurement. This thesis work aims at evaluating the potential savings within air treatment systems in energy efficient buildings, and to develop a calculation tool to meet the demand that is likely to arise from property owners who want to save energy.
Månsson, Markus, and Peter Wahlgren. "Energianalys på Volvo Aero." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11688.
Full textDetta examensarbete har genomförts på Volvo Aero i Trollhättan och består av tre delar: en kartläggning av processventilationens uppbyggnad på ett antal utvalda maskiner och beräkning av dess energiåtgång, en jämförelse ur energieffektivitetssynpunkt mellan ett nyutvecklat maskinkoncept som kallas MultiTask-Cell och traditionell tillverkning, sist har en tomgångsanalys gjorts i verkstaden för att identifiera vad som använder elenergi då ingen produktion sker.
För att kunna genomföra uppgifterna har mätningar av elanvändningen gjorts på både maskinnivå och transformatorer, detta för att kunna beräkna energianvändning på utvalda maskiner och även få en helhetssyn över verkstadens energianvändning. Det har även gjorts datainsamling och intervjuer för att få grepp över processventilationens funktion och uppbyggnad.
Det finns två varianter på processluften, ett där konstant relativt högt luftflöde används och ett när man genom varvtalsreglering av fläkten använder ett lägre grundflöde som forceras en viss tid vid spindelstopp. Ur energisynpunkt är metoden med grundflöde och forcering att föredra då det leder till både mindre energiförluster genom processluften och en stor minskning av fläktens elbehov. Det har även räknats ut en teoretisk energibesparing vid införande av värmeåtervinning för två maskingrupperingar.
Jämförelsen mellan MultiTask-cellen och traditionella maskiner har gjorts genom att mäta den energi det krävs för att tillverka en detalj för respektive tillverkningssätt. MultiTask-cellen visade sig använda cirka 25 % mindre energi än de traditionella maskinerna för tillverkning av samma typ av detalj.
Tomgångsanalysen visar på ett högt effektuttag även då det ej sker någon produktion på Volvo Aero. Detta beror till stor del på att maskinerna har en relativt hög tomgångsförbrukning. Denna krävs för att hålla maskinen varm vilket ger en så problemfri uppstart som möjligt. Att byta ut allmänbelysningens armatur till nyare och modernare skulle årligen ge en betydande energibesparing.
Beckne, Petter, and Eric Palander. "Energianalys av nybyggt trygghetsboende." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-76520.
Full textAfter 2045, greenhouse gases should be reduced to a zero level according to the Swedish parliament. Energy use in Sweden from residential and service sector is 40 % of the country´s total energy use. The study is based on an energy analysis of a multi-family building in Ronneby. The building is a trygghetsboende, which means unique living conditions for the residens. Actual energy use in the building is about 25 % higher than projected energy use. The main purpose of the study is to make energy calculations to match better with real specific energy use. The study is based on energy simulations, thermography and interviews of residents´ airing habits. Results from the simulations based on actual data, show an expected energy use similar to the measured values. Differences between the simulations depend on the unique conditions in the building, input data for ventilation and the building envelope elements. The conclusion is that living habits of residents in buildings have a decisive role in the buildings energy use.
Bringner, Martin. "Energianalys av Lavalverkstaden : Siemens Industrial Turbomachinery." Thesis, Linköping University, Energy Systems, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-52124.
Full textDet svenska elpriset har under de senaste åren stigit kraftigt vilket inneburit avsevärt högre energikostnader för många företag. Siemens Industrial Turbomachinery i Finspång är en av dessa och har under en längre tid sett hur energianvändningen ökar för varje år, framförallt på grund av en allt intensivare produktion. Företaget vill därför se över energianvändningen i verksamheten. En energikartläggning och åtgärdsförslag av den största produktionsbyggnaden på området, Lavalverkstaden, är ett steg i den riktningen.
Energikartläggningen har i grunden baserats på mätningar för att få en översiktlig bild över hur energianvändningen ser ut. Det sker genom att dela in energianvändningen i enhetsprocesser. Med mätningarna som stöd har också åtgärdsförslag identifierats och till viss del har det varit möjligt att kvantifiera besparingspotentialen. Investeringskostnaden är beräknad för de två största investeringarna, i övriga åtgärder är bara hänsyn tagen till besparingen.
Resultatet visar att det finns stora möjligheter att energieffektivisera verksamheten. Byte till ny allmänbelysning och ny tryckluftskompressor är de åtgärder som kräver störst investeringar men som också ger störst besparingar. LCC-analyser visar i båda fallen stor lönsamhet och investeringarna är betalda inom fyra respektive sex år. För övrigt föreslås bland annat konvertering, styrning av belysning och reducerad tomgång. Till följd av åtgärderna kan totalt 1,6 Mkr sparas genom reducering av
- 1 540 MWh el (-13 %)
- 733 MWh fjärrvärme (-15 %)
- 261 MWh fjärrkyla (-12 %)
Förutom de åtgärder som kan konkretiseras just nu finns en stor potential på lång sikt. Genom att fokusera mer på energianvändningen i det dagliga arbetet och ersätta energikrävande utrustning mot energieffektivare alternativ kan företagets energianvändning reduceras även framöver. Bland annat finns förslag i rapporten på vad som bör finnas med i inköpsrutiner för att främja inköp av energieffektiv utrustning.
In recent years the Swedish electricity price has risen sharply, which resulted in significantly higher energy costs for the companies. Siemens Industrial Turbomachinery in Finspång is one of those companies and for a long time they have seen how the energy usage is increasing every year, mainly due to an increased production. Therefore the company wants to investigate the energy usage and make an energy analysis of Laval workshop, the biggest production plant of the company.
The energy analysis is fundamentally based on measurements to get an overview of the energy usage of the plant. By dividing those in support and production processes, possibilities to energy efficiency measures have been identified and the savings potential quantified. The investment cost is quantified for the two largest investments, in other energy efficiency measures only the saving is taken into account.
The conclusion is that there are great possibilities to increase energy efficiency. A change of general illumination and a new air compressor calls for the greatest investments but also provides the greatest savings. LCC-analysis shows in both cases high profitability and investments are payed back within four and six years respectively. Moreover, a conversion, reduced lighting and idling losses is suggested. Due to the proposed actions, savings of totally 1.6 million SEK a year can be made by reducing
- 1537 MWh (-13 %) of electricity
- 733 MWh (-15 %) of district heating
- 261 MWh (-12 %) of district cooling
In addition to the energy efficiency measures that can be concretized there is a great potential to reduce the energy use also in longer term by focusing more of energy use in daily work. By adding routines when purchasing, energy efficient equipment can be promoted and energy use will be reduced even more.
Corrigox, Adam. "Energianalys av rörledning med överhettad vattenånga." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-33165.
Full textHeat transfer is an important physical phenomenon with many different industrial applications, where the transport of a fluid in a pipe is an important part. The main mechanism of heat transfer in flowing or stagnant fluids is convection. A better knowledge and understanding of the underlying physics would imply that the design of the systems could be optimized in order to obtain an economic process by minimizing energy losses and cost of materials. A steam turbine in a power plant produces electricity by superheated steam flowing through the turbine. The superheated steam is then transported from the turbine into a pipeline to be used for heating processes in a nearby pulp mill. In this work, an energy analysis was carried out on the pipeline with superheated steam in order to determine the temperature distribution. The choice of material in the pipeline is dependent on pressure and temperature, and with a lack of knowledge of the temperature distribution along the pipe, the construction could be unnecessarily costly. A mathematical model was set up with the energy balances acting on the pipeline. An analytical calculation was carried out to analyze how much the heat loss from the pipe is and how much the temperature of the steam decreases. A dynamic model was then built in Simulink to simulate the accumulation of heat in the pipe and the insulation over time, and the mass flow of cooling water. A literature study of the vaporization of the cooling water was carried out to find the parameters that affect evaporation and thus is important in determining the time it takes until all have vaporized. The results of the calculations show that the temperature drop of the superheated steam in the flow direction becomes very small. This is because the energy content of the flowing steam is very large compared to the heat loss through the pipe wall. The result from the dynamic simulation shows that the insulation has a larger time constant compared to steel pipe. This is presented in the form of the step response. The choice of material will be affected by the position of the desuperheater. In this system the desuperheater is not optimally placed since it is about 42 m after the inlet of the turbine. It would therefore be possible to place it closer to the turbine and then switch to a cheaper lower strength material.
Blomqvist, Camilla. "Jämförande klimat- och energianalys av tunneldrivningsmetoder." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297794.
Full textA new metro line of eight kilometers will be built in Stockholm between Älvsjö and Fridhemsplan, where WSP has been commissioned to carry out a location work that is an initial stage in the project. As part of the location investigation, it is included to choose which tunnel driving method is to be used for the tunnel operation, where conventional tunneling with drilling and blasting is compared with full- face-boring with a tunnel boring machine. This thesis is a comparison between the two tunneling methods where the investigated parameters are climate impact in the form of greenhouse gas emissions and energy use in the form of primary energy and energy for processes. The methods were investigated through a limited life cycle analysis that included the construction of the metro and a limited part of the use phase. The results showed that for tunneling in hard rock without weakness zones, which is the most advantageous, conventional tunneling performs better from a climate perspective, while the methods have almost the same energy use. The resources with the largest contribution were concrete, shotcrete, rock shafts and rock mass transport. A sensitivity analysis was performed to test the methods' sensitivity to changes in input data and conditions. For geological changes where the section was assumed to consist of a water passage with weakness zones, the tunnel boring machine performed best for both parameters. With changes in the form of increased grouting of cement, conventional tunneling showed the greatest sensitivity, but the order of magnitude did not change compared with the standard scenario. Furthermore, it was tested how the methods reacted to the inclusion of reinvestment, in the form of repairs of drainage mat and shotcrete, where the results showed that conventional tunneling had the greatest sensitivity, but even here the magnitude remained the same. In addition, measures were identified whose emission factors could be used to calculate potential climate impact reduction for the two tunneling methods. The measures with the greatest reduction potential included, among other things, electrification, hybridization, carbon dioxide storage and the use of biofuel and biochar. This scenario showed that by 2045 it is possible to reduce the climate impact by 97.6 percent for-face-boring and 87 percent for conventional tunneling. The implementation of the measures resulted in the full-face-boring having the lowest climate impact from 2035 onwards. Recommendations for further studies are to include more sustainability parameters but also to design goals that limit energy use to a sustainable level, in the same way that there are climate neutrality goals. It is also recommended to focus on the resources that did not show as high a reduction potential, more specifically drainage mats and explosives. There is great potential for reducing their climate impact, but it is probably a matter of time, costs and risks within it is implemented. It may also be interesting to examine the processes that were excluded from the life cycle, especially regarding the work machines such as the tunnel boring machine.
Patsonen, Joakim, and Jonas Johansson. "Energianalys av studentbostäder : -Kv. Gråstenen i Halmstad." Thesis, Halmstad University, School of Business and Engineering (SET), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-5182.
Full textDetta examensarbete är en energianalys av Studentboendet på Nyhemsgatan, Kv. Gråstenen Halmstad, i samarbete med Halmstads Fastighets AB.
Fastigheterna är byggda 1997 och är till antalet 11 stycken med sammanlagt 385 lägenheter, avsedda för studenter under den tid de studerar i staden. I var och ett av de 11 husen finns för gemensamt bruk ett allrum samt ett större kök där studenter kan samlas om så önskas och på entréplan finns en tvättstuga tillgänglig.
En analys genomfördes genom att studera konstruktionsritningar, ventilation, värme och vattensystem samt att beräkningar på fastigheterna utfördes i datorprogrammen, VIP+ och Isover Energi vilka sedan analyserades. Med hjälp av termografering påvisar vi här köldbryggor vid fönster samt vid anslutningen vägg och vindsbjälklag.
Till sist tog vi fram åtgärdsförslag som vi rekommenderar för att sänka energiförbrukningen. Bland dessa åtgärdsförslag kan nämnas installation av frånluftsvärmepump samt en översyn av duschanordningarna.
Som sammanfattning kan sägas att byggnaderna är i ett gott skick men med höga energiförbrukningar där möjlighet till besparingar finns.
Carlander, Nathalie, and Sara Vagiström. "Energianalys och förbättringsåtgärder : Axel Dahlströms Torg 3." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10752.
Full textZayton, Hedro Gabriel, and Nagra Jaspreet Singh. "Energianalys av äldre flerbostadshus : Kvarter Kommissionären i Mariestad." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-765.
Full textThis bachelor thesis does an energy analysis of six multi-family houses. The properties are located in the housing block called Kommissionären and are owned by Mariehus AB. This company manages and develops renting apartments and make sure that their residents feel good in their properties. The purpose of this diploma work is to help the company analyze their properties from both an energy and a building technical point of view. The purpose is to study energy usages and energy losses. This proposes a couple of steps to reduce and improve the energy efficiency in the houses. The six houses were built between in the 1940´-s and the 1960’-s and are in need of refurbishment to become more energy efficient. The reason is large energy losses through different parts of climate shell. Regarding ventilation, a lot of energy is lost annually which, through simple measures, can be saved. In summary, the six multi-family houses are in fairly good condition considering their age, but that there is still potential for saving energy due to the high energy losses.
Östanbäck, Kristian. "Energianalys av fastigheten Björnen : Kvarteret Björnen i Mariestad." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-806.
Full textThis report is covering an energy analysis of the property Björnen, Mariestad. The report willcover aspects assumed to have a critical impact on the energy use of this property in particular.Examples on how produce documentation and analysis of existing documentation is covered.Missing documentation or badly organized one can cause major problems in an energy analysis.This problem is sought to be partially eliminated through this report.One purpose of this report is to declare possible profits that may be the result of proposed energyefficiency actions regarding this property. Actions such as renovation. The central purpose,however, is to create an understanding of how this property in particular is using the energydelivered to it. A survey of how the property is functioning in these aspects with appurtenantstatistics and analysis are covered. This should act as a base of thought to consider for possibleactions taken with this property in the future.