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Academic literature on the topic 'Energiförbrukning'
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Dissertations / Theses on the topic "Energiförbrukning"
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.
Books on the topic "Energiförbrukning"
India, GCC and the Global Energy Regime: Exploring Interdependence and Outlook for Collaboration. Academic Foundation, 2007.
Find full textGold, Russell. Boom: How Fracking Ignited the American Energy Revolution and Changed the World. Simon & Schuster, 2014.
Find full textThe boom: How fracking ignited the American energy revolution and changed the world. Simon & Schuster, 2014.
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