Dissertations / Theses on the topic 'Bergvärme'
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Back, Natalii. "Bergvärme som energikälla." Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-712.
Full text2008-05-26
Bedrock heat as an energy source
The sun has warmed up the bedrock and this heat can be used for warming up houses. Approximately 100 – 200 meters down in the bedrock the temperature of the heat is stable. This is a source of energy that can be used by installing a heat pump system. The ground source heat pumps are low maintenance and can last for many years. There is also a pollution risk for the groundwater and therefore the wells in the area. Before the ground source heat pump can be installed the municipality need to give permission, according to the environmental code. To install the system without permission is a crime against the environmental code. A requirement when applying for permission to install the heat pump system is to get the neighbours to agree with the place for the bore hole. The neighbour can appeal against the environmental and health authorities’ decision to give permission to install the ground source heat pump system. However there needs to be more research done regarding the environmental effects that may occur in the future, if the ground source heatpump system continues to increase as rapidly as today.
Grenbäck, Albin. "Utredning av potentiell installation av bergvärme." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160551.
Full textEn bostadsrättsförening i Umeå kommun har under längre tid varit intresserade av att sänka kostnaderna för uppvärmningen av fastigheten. Fastigheten består totalt av 4 byggnader där 3 är flerbostadshus med totalt 36 lägenheter och en kontorsbyggnad. Bostadsrättsföreningen var intresserade av att veta vad en installation av bergvärme skulle kosta och hur lång payback-tid det resulterar i. Genom att rita upp fastigheten i Revit med hjälp av ritningar kunde klimatskärmens skikt och drift av ventilation sammanställas för att beräkna energiförlusterna. Den interna värmegenereringen beräknades med hjälp av schablonvärden. Med de totala värmeförlusterna och den interna värmegenereringen kunde det årliga energibehovet beräknas med hjälp av varaktighetsdiagram. När det årliga energibehovet var känt jämfördes det med den årliga fjärrvärmeanvändningen och programmet Nibe Dim användes för att välja ut tre olika alternativ. Billigaste installationen av bergvärme visar att av de tre alternativ som presenteras skulle det innebära en investeringskostnad på 1 800 000 kr med en besparing på 75 000 kr/år. Återbetalningstiden för investeringen blir emellertid så hög som 24 år.
Acar, Yalda, and Karina Skrobic. "Småhuset – val av bergvärme, fjärrvärme eller pellets." Thesis, KTH, Byggnadsteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-103015.
Full textFreij, Erik, and Stefan Östangård. "Valet mellan bergvärme och lufvärmepumpar i Sverige." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-30614.
Full textRådmark, Rasmus. "Förstudie för konvertering till bergvärme vid Gällivare Sjukhus." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-78653.
Full textGeothermal energy is an alternative that more and more companies choose when it comes to cooling and heating properties, but so far most of the geothermal facilities in Sweden are small-scale. The hospital in Gällivare use district heating and this master thesis is a pilot study to convert from district heating to geothermal energy. The cost for the district heating in Gällivare is one of the highest in Norrbotten and has not increased or decreased the past few years. The mean temperature in Gällivare is low which means that the hospital has a high heat demand but a low cooling requirement. This pilot study analyses three scenarios to convert to geothermal heating system with the possibility to cover the cooling requirement as well. These scenarios are configured to cover 100% of the cooling requirement but different heating demands of 100% for Scenario 1, 50% for Scenario 2a and 40% for Scenario 2b. To cover this demand, Earth Energy Designer 4.1 and Microsoft Excel are used to configure the heating system and to do the comparison between the scenarios. The cooling requirement is calculated based on the outside temperature in Gällivare and the equipment used in the hospital. A simulation was made in IDA-ICE to analyze the cooling requirement for the ventilation and for the people inside the hospital. A comparison between the scenarios was made using the LCC (Life Cycle Cost) method. The LCC was made with a 20 years lifetime on the heating system. In addition, the environmental impact in the form of carbon dioxide emissions is calculated for the different scenarios during the estimated lifespan. The sizes on the heating systems in the different scenarios varies in both the number of boreholes and the depth on the boreholes, which was reflected in the result. Investment cost for the heating system varies between 18 071 tkr for Scenario 2b which covers 40% of the demand and 53 272 tkr for Scenario 1 which covers 100 %. Scenario 2b proves to be the most profitable solution with a payback time of 15 years while Scenario 1 and 2a got a payback time of over 20 years. From an environmental aspect Scenario 1 is the best option with a decreased usage of carbon dioxide of 42 739 tons over 20 years.
Josefsson, Maria. "Optimering och utvärdering av bergvärme kombinerat med fjärrvärme." Thesis, Luleå tekniska universitet, Energivetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-81181.
Full textIn 2017, two years after the housing association Backadalen made an investment in geothermal heat for 20% of its apartments in Hisingen Gothenburg, a pilot project called Smart Heat was started. The purpose of Smart Heat is to operate boreholes and heat pumps in the most cost-effecient way possible. This means that the cheap heat that is available in the summer is stored as geothermal energy and used during the coldest part of the year with the help of heat pumps. This report looks at how an optimal Smart Heat installation can provide the best profitablility. This thesis is limited to a temperature in the boreholes at 5 to 40 degrees and only deals with investments in heat pumps and boreholes. A system design was drawn up and then optimized on given input using linear programming in MATLAB. This optimization was then used in the program Earth Energy Design to simulate the temperature and derive borehole layer size. Three different configurations of power and capacity of borehole systems were selected and investigated. The number of boreholes were 252, 187 and 91, which covers 90%, 66% and 35%, respectively, of the total heat demand from November to April, excluding the hot water requirement. The operating benefit, i.e. the difference between using only district heating and combining district heating and boreholes, was 1.55, 1.12 and 0.58 million SEK. The investment cost, whereof 67% consisted of the heat pump cost, was 46, 34 and 17 million SEK, giving a payback time of around 50 years at a discount rate of 2% for all three configurations. The conclusion is that an installation like Smart Heat with limited temperatures in the boreholes is not by itself economically feasible. On the other hand, an investment in boreholes and heat pumps should be compared with other energy sources and further investigated in the development of areas without already functioning district heating networks or other renewable heat sources. Economically, the cost of a heat pump impacts the result the most. Some options for reducing the cost of such an investment is through a higher temperature in the boerholes and a lower supply temperature to the houses. By changing these temperatures, the heatpump will be less necessary to the system. For the three different scenarios in this report, the power balance of the district heating system would not be adversely affected. Finally, geothermal heat combined with district heating is a solution that should be investigated further and which can be an important part of achieving a higher amount of renewable energy in the energy market.
Johansson, Alexander. "Energikartläggning av Benzeliusskolan : Med investeringskalkyl för installation av bergvärme." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70263.
Full textLundberg, Daniel. "Bergvärme och solenergi i flerbostadshus : En förstudie över Kv. Uppfarten." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105107.
Full textLindberg, Alexander. "Jämförelse av fjärrvärme och bergvärme, kompletterad med solceller i Helsingborg." Thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-34923.
Full textOlsson, Victor. "Applikationer med värmepumpar : En jämförelse mellan bergvärme- och luft/vattenvärmepumpar." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10728.
Full textThe client of this thesis lacked a basis for comparison of geothermal heat pumps and air/water heat pumps in two unique projects. This thesis will provide an updated picture of the differences in operations and finance between the heat pumps for both current and future decisions of projects. This study presents a theoretical review of the heat pump's function, history and efficiency based on literature studies in these subjects. One of the facilities is an indoor pool in Oslo, whose dimensioning of heat source are presented in this work. A result of calculations show that a heat extraction from the bedrock is possible throughout the year if the active depth is sufficient. Awitar, which is a new research facility built by the Swedish Technical Research Institute, SP, is this works second facility. Profitability calculations for both projects make the basses for the results of investment in the geothermal heat pump and air/water heat pump. Annuity, which is the annual cost of an investment, turned out to differ very little between the heat pumps at both facilities. The heat pumps for the indoor pool have both the annuity of about 16 thousand SEK/year and Awitar annuities are about 111 thousand SEK/year. The initial investment value for the geothermal and the air/water heat pump to the indoor pool amounts to 295 thousand SEK and 120 thousand SEK, respectively, and for Awitar, 485 thousand SEK and 175 thousand SEK, respectively.
Ahlgren, Josef, Stefan Andersson, and Johannes Klintenheim. "Uppvärmning och miljöpåverkan : -en jämförelse mellan fjärrvärme och bergvärme i villa." Thesis, Jönköping University, JTH, Civil Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1491.
Full textMany of todays studies show that district heating is one of the betteralternatives as heating source because of its low environmental load.
The energy source is often leftovers from other processes producing energy or waste, like garbage or chips.
Electricity in combination with geothermal heating is another heating system that has increased sharply during the last years, and also this system decreases the discharges that have negative affects
on the environment compared to several other heating methods.
This report aims to, concentrated towards these two different heating systems, estimate the amounts of discharges they indirect cause and how the environment is affected.
We have calculated the mean value for discharges of carbon dioxide, nitrogen oxide, sulphur oxide and dust generated from electrical power used in Sweden.
Through interviews and research we have gained data for the same substances that district heating based on combustion of garbage and biofuel generates.
We have also in cooperation with a housing company chosen a building we see representative for many of the new single-family houses built in Sweden today.
Based on its shape and appearance we theoretically created three alternatives of the same house, each of them with climate screens different from each other.
Together with the amounts of discharged environmental affecting substances, these houses were the base for our calculations and studies when investigating the different heating sources environmental effect.
The results have thereafter been analyzed and discussed from different angles.
Henriksen, Theodor. "Energisimulering av ett nordsvenskt plusenergihus med kombination av bergvärme och solceller." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-35985.
Full textThe interest in low-energy-houses has risen in recent years as the energy usage around the globe is constantly increasing, resulting in ever-increasing amounts of greenhouse gases in the atmosphere. In this project, the energy consumption of a building in a northern area of Sweden, Gnarp, with an Atemp of 716m2 was simulated using IDA indoor Climate and Energy (IDA ICE) and WINSUN. The building has two floors and is comprised of eight apartments. It is heated using geothermal heating since it is not located close enough to a district heating area. The goal of the simulation was to determine if this building is an energy-plus-house, whereby a PV-system mounted on the rooftop allows for the energy production-value of the building to be higher than the energy-usage. The theoretical results of the simulation show that this building is indeed an energy-plus-house since the PV-system is generating more energy than the yearly usage of the building. This simulation shows that it is possible to build an energy-plus-house in northern areas of Sweden where temperatures are highly variable and can go below -30°C during winter season. It indicates a yearly electricity-production of over 26 700 kWh/year and a usage of approximately 16 400 kWh/year, where the domestic hot water accounts for the highest usage of electricity. This means that the building generates an electricity surplus of approximately 10 300 kWh/year. The building is well isolated and has well placed windows for heat generation via the sun. It includes an effective heat pump, an FTX-system, and solar panels on the roof which gives the opportunity for an energy-production that is larger than the energy-usage, which in turn gives the opportunity for an energy-plus-house classification. The heating, domestic hot water, and the building electricity were all considered when calculating the estimation of the energy-quality of the property. The PV-system generates more energy during the summer, which results in an overproduction of electricity at certain times of the year. The extra electricity produced can be sold to the electric utility.
Nilsson, Mathias. "Energieffektivisernade åtgärder med fokus på värmesystem : Installation av bergvärme och dess lönsamhet." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-173660.
Full textDue to high heating costs, the municipality of Lycksele wants to investigate the economic aspects of investing in geothermal heating for a property that houses healthcare and care operations. The property is located outside urban area Lycksele, which excludes district heating as an alternative. At present, the property is heated by means of an air-based floor heating system of the type Legalett, which is heated by electric heaters. The main purpose of the project is to determine if a change of heating system from electrical heating to geothermal heating is a good alternative for the municipality to invest in. By conducting a profitability analysis, the profitability of the action of investing in geothermal heating will be investigated with the hope that the report will be able to help the municipality make decisions regarding these types of actions in the future. By compiling property data collected with the help of the property department of Lycksele municipality, the property's heating needs could be determined and the geothermal heating system dimensioned. An inverter-controlled ground heat pump was chosen to cover 100% of the energy demand, which means a virtually non-existent need for peak heat. Costs for, among other things, drilling of geothermal heat, the procurement of heat pumps and new water-borne heaters were calculated and formed the basis for the profitability analysis carried out. Two alternative investment options were made where the difference were the heat emitters. Option 1 includes geothermal heating and adaptation of existing underfloor heating system, while option 2 includes geothermal heating and costs for a new radiator system. The estimate of the cost of investing in a new radiator system was made to provide an alternative that could counteract some of the problems experienced with the existing underfloor heating system. The profitability of the two alternatives was estimated using the net present value method and the payback method. The result of the calculations meant that the cost of drilling for the geothermal heat amounted to about SEK 785,000, to which the cost of a heat pump is added, the reference pump's value was SEK 166,000. The price of new units for the Legalett system was SEK 14200 per unit. The estimate of the cost of the conversion to a radiator system amounted to SEK 1.05 million. This means total investment costs of just under SEK 1.4 million for option 1 and about SEK 2 million for option 2. The lower energy consumption made possible by the geothermal heating was estimated to amount to approximately SEK 227,000 per year in economic savings, which means that the payback time for the two alternatives' basic investments is 6.02 years for options 1 and 8.8 years for option 2. Since the boreholes have a longer lifespan than the heat pump it was estimated that the heat pump will need to be replaced twice during the entire lifespan of the investment. The net present value of the two alternatives amounted to approximately SEK 3.4 million for alternative 1, while for alternative 2 it amounted to approximately SEK 2.7 million over the entire lifespan of the investment. Both the present value method and the payback method indicate that the investment should be profitable as the net present values for both alternatives are positive and the payback time is less than 20% of the estimated lifespan of the investment. The alternative that provides the best profitability is option 1, which is due to the lower investment cost when adapting the existing system.
Kohnechian, Sahand, and Almén Erik Nikkanen. "Uppvärmningssystem - En analys av valmöjligheter för småhus." Thesis, KTH, Byggvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102367.
Full textLeo, Greger. "Möjliga alternativ för att ersätta direktverkande el i flerbostadshus." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-15301.
Full textWahlén, Sofia. "Bergkyla och bergvärmeutredning för industrilokalen Rödbergsmyran 5 i Umeå, Västerbotten." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-86321.
Full textJonsson, Björn. "Utvärdering av ett större bergvärmesystem i en flerbostadsfastighet som har konverterats från fjärrvärme." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-159361.
Full textCarlsson, Johan, and Patric Blomberg. "Geoenergi : En studie på Nyköpings lassarets möjlighet till fri-värme/kyla m.h.a. ett borrhålslager." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-16471.
Full textSterner, Annica. "Konvertering från direktverkande el i kommersiella lokaler : Ekonomisk och hållbar utveckling." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36469.
Full textByggnader i världen står för 40 % av den totala energianvändningen. Klimatförändringar får allt större betydelse, men få är villiga att dra ner på sin levnadsstandard eller få högre kostnader för förändringarna. Genom att energieffektivisera det befintliga fastighetsbeståndet ges de största vinsterna ekonomiskt och miljömässigt. Fastighetsbolaget Klövern AB förvaltar 46 fastigheter i Karlstad Kommun. Uppvärmning är den största utgiften av de totala driftskostnaderna för fastigheter. Stigande energipriser ökar behovet för Klövern AB att energieffektivisera och utreda alternativa värmekällor. Rapportens syfte är att undersöka alternativa värmekällor för Hammaren 21, en av Klöverns fastigheter som idag har direktverkande el. Ett nytt system utreds ur en ekonomisk och hållbarhetsmässig aspekt. Målet är att kunna presentera ett resultat som kan användas som beslutsunderlag hos Klövern AB. Den ekonomiska analysen sker genom att beräkna totalkostnaden över 20 år med en LCC (LifeCycleCost) i nuvärde, vilket innebär att summan räkas om till dagens penningvärde. Denna beräkning utförs med tre möjliga scenarier, där kalkylränta, inflation och prisökning på energi varieras utifrån ett normalfall, som anses som det mest troliga, samt låg- och hög prisutveckling. Hållbarhetsaspekten analyserar koldioxidpåverkan samt resursåtgång med avseende på MWh bränsle. Fastigheternas totala energibehov för värme är 228 000 kWh/år vilket motsvarar 117 kWh/m2. Kostnaden för uppvärmning och tappvarmvatten är 204 000 kr/ år. Fjärrvärme har en lägre investeringskostnad och en högre årskostnad jämfört med bergvärme, där det omvända gäller. Det mest ekonomiskt lönsamma valet är att installera bergvärme, med en värmepump per fastighet. Detta ger en årlig besparing på 75 % av driftskostnaderna, och total kostnadsbesparing under 20 år mellan 800 000 och 2 700 000 kr. Bergvärmen kan även utnyttjas till att kyla lokalerna. Installation av fjärrvärme ger en årlig besparing av driftkostnaderna på 39 % och en total kostnadsbesparing över 20 år mellan 780 000 kr och 1 830 000 kr. Pay-off för fjärrvärme är 4 år och för bergvärme 7 år. Fjärrvärme är bästa valet ur en hållbarhetsaspekt. Fjärrvärme ger ett minskat koldioxidutsläpp på 203 ton CO2/år och en minskad resursåtgång på 481 MWh bränsle. Motsvarande siffror för bergvärme är 173 ton CO2/år respektive 421 MWh bränsle.
Turesson, Mikael. "Ventilation och värmekällor en fallstudie för två skolor i Bodens kommun." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65502.
Full textRagnarsson, Julia, and Therese Derevall. "Vilket uppvärmningssystem lämpar sig bäst i framtida stadsdelar med låg energianvändning? : En studie av fjärrvärme, bergvärme och solvärme." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-34119.
Full textAndersson, Frida, and André Sahlsten. "Studie av åtgärder för att öka värmefaktorn för bergvärme till en villa : Genom forcerad konvektion över värmekälla samt flödesoptimering i borrhålskrets." Thesis, KTH, Energiteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148056.
Full textThis report contains a study of a downhole heat exchanger and it’s . The system has two boreholes connected by a by-pass valve which makes it possible to vary the flow in the boreholes and the heat exchanger. In addition to that the radiators have radiator fans installed underneath them. These radiator fans will contribute to an increase in the heat transfer between radiator and room. Measurements of the heat transfer have been done both with and without the radiator fans operational. The flow in the boreholes was kept constant to measure the impact on the energy taken from the boreholes. To measure the type of flow in the boreholes which gave the highest, two different operating cases were tested, one with laminar flow and one with turbulent flow. This to examine how the type of flow impacts the heat transfer between the ground and heat carrier fluids and by that determine in which case the highest is obtained. The result shows that a greater is obtained when the radiator fans are operating than when they are not, and that a turbulent flow gives a higher than a laminar flow. To obtain the highest possible value for the case with operating radiator fans should be combined with case for turbulent flow.
Sjödin, Anton, and Rasmus Hagman. "Geoanläggning i Nya Krokslätt – Beskrivning och utvärdering av driften." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-14980.
Full textWhen demands are made for more renewable energy sources, the geoenergy technology has been developed gradually to provide heating and cooling in the various sectors with the bedrocks properties and heat pumps. Since the housing and real estate sector accounted for about 40% of Sweden's total final energy use in 2015, opportunities for the development of geo-plants can reduce environmental impact while reducing energy useage as well as costs. At the request of Husvärden AB, the geo-plant called Mediacentralen was built in the Nya Krokslätt area in Mölndal. Three refrigeration heat pump in the plant provides the area with cooling and heating all year round. Mediacentralen houses a large number of components that are vital for maintaining the operation of both cooling and heating operations. The purpose of this work is to illustrate and describe how a larger geothermal-plant in New Krokslätt works, as well as investigate how the operation has been and if there are improvements to perform. By obtaining measurement values from the plant and processing them with various software, analyzes of individual components as well as the general operations can be performed.During the course of the work no concrete problems have been encountered in the operation of the Mediacentral. On the other hand, it has been found that the collection of the measurement data is insufficient and that the improvement possibilities were aggrivated by this. The difference in operating time between two of refrigeration heat pumps is 3000 hours since the commissioning of the facility 2015 indicates errors in the measurement value logging, as the measurement of energy use and capacity shows the opposite. Even the heat factor of the refrigeration heat pump, the measure that provides their efficiency, differs significantly from month to month, giving an indication that something can be improved in the long run.
Sedin, Marcus. "VVS-projekteringsförslag på LSS-bostad." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-121943.
Full textWesterberg, Elin. "Sänkt energiförbrukning med byte av energisystem eller energieffektivisering : Ekonomisk analys av fjärrvärme, bergvärme och luft-vatten värmepump i äldre fastigheter kontra energieffektiviseringsåtgärder." Thesis, Mittuniversitetet, Avdelningen för kemiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-31030.
Full textDistrict heating is the dominant heating method for apartment buildings in Sweden, and its competitor is the heat pumps that have become increasingly efficient and have a better impact on the market. At the same time, the government has set the 2020 targets in order to reduce and improve Sweden's energy use. As the housing sector accounts for almost 40 percent of Sweden's total energy use, the report's purpose is to study how energy consumption for older homes can be reduced by changing energy systems or by maintaining an existing district heating system, but performing energy efficiency measures. The energy systems studied in this report are district heating, geothermal heat and air-water heat pump. The data used in the report has been largely collected from a apartment building located in Vingåker, owned by Sjötorps hus AB. In order for the results to be more general, two example houses have also been studied; A small house and a larger apartment building. The result of the study shows that the biggest cost of district heating is in operation, and thus this option is also the most expensive for the two major houses. However, both investment costs and maintenance costs are significantly higher for heat pumps and vary depending on where in the country they are to be installed, unexpected downtime and breakdowns. The result also shows that it is not profitable for a small house to switch from an existing district heating system to a heat pump. The conclusion is that energy efficiency should be the first option to reduce the energy consumption of a property, especially as the stock of older houses will increase. No matter how little the energy consumption for the newly built houses are, the older houses will be the largest part of Sweden's total housing stock. The fact that the heat pump uses less energy is no long-term solution to energy efficiency. Instead, energy efficiency actions should be the first option when the desire is reduced energy consumption.
Persson, Joakim. "Fjärrvärmens livscykelkostnad för småhusägare i Örebro kommun : En jämförande studie av nya föreslagna fjärrvärmelösningar och deras potential att öka fjärrvärmens konkurrenskraft gentemot bergvärme." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270047.
Full textLarson, Karl. "Energiberäkning och utvärdering av valbara värmekällor för skolbyggnad vid Miljöbyggnadskrav." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-377242.
Full textHöglund, Magnus, and Martin Olsson. "Återladdning av bergvärmekonfiguration vid samfälligheten Ängsbacken." Thesis, Linköping University, Energy Systems, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54379.
Full textUnder detta projekt har vi tittat på hur man kan återladda en bergvärmekonfiguration med lågtempererade solfångare. Projektet utfördes åt Newsec Energy i Stockholm vars kund samfälligheten Ängsbacken ville minska andelen tillskottsenergi som utgörs av olja till sin bergvärmeanläggning. En utredning av anläggningen gjordes av Newsec Energy som visade att berget kylts ned och att anläggningens borrhål varit underdimensionerade. Vi fick uppdraget att utveckla en systemlösning med lågtempererade solfångare.
Walde, Fredrik. "Metod för analys av elförbrukning i hushåll." Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-6098.
Full textStrandberg, Mattias. "Kombinerad uppvärmning av fastighet och kylning av isplan : Fallstudie med termisk analys av Innertavle bygdegård." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-148364.
Full textWith an ever increasing energy consumption in the world, there is a dire need for a conversion of the worlds energy systems, where energy efficient solutions and using the maximum potential of the energy sources are paramount. Urbanization has led to an increased focus on large cities, with bigger systems for joint production. However, smaller cities and communities also require sustainable energy solutions. In these conditions, geothermal heat pumps has a great potential to cover the need for heating in the residential sector. A heat pump can provide heating and cooling at the same time, and when the heating requirement is being fulfilled the cooling can be used for other purposes, and as such use more of the systems available potential. This thesis work has implemented a case-study approach, and evaluates the possibility of adding shallow horizontal ground heat collector pipes to a vertical ground heat exchanger system, with the purpose of cooling an outdoor ice rink. The thesis explores what conditions are required to successfully apply the concept to the existing property Innertavle bygdegård, with a 600 m2 large adjacent field which in the winter time is used as an ice rink. The method used in the thesis is simulating the shallow horizontal ground system in Comsol Multiphysics®v.5.3a. In addition to this, a dimensioning of the borehole heat exchanger is performed. The thesis work has been performed in association with Sweco Systems for Energilösningar Norrland.The results of the study show that cooling of the ice rink requires a refrigerant with a minimum temperature of -4 to -6°C, and a heat extraction of more than 150 W/m2 from the ground. Using the available heat load from the house the system can keep an ice rink of between 30 and 60 m2 under freezing temperature. If the system is optimized for cooling of the ice rink the refrigerant only has to be -4 to-2°C, and the cooling load just over 50 W/m2, to sufficiently cool the ice surface. In addition, a modification of the operating time can reduce the cooling need so that the optimized system can cool a ice surface the size of 100 m2. The borehole is calculated to require an active length of 390 - 415 m depending on the diameter of the borehole. The conclusion of the results is that a combined system with a ground source heat pump with simultaneous cooling of an ice rink not can be recommended for the examined case.
Fredriksson, Victor, and Bane Gluhajic. "Heating systems in small houses : A comparison between geothermal heating and district heating." Thesis, KTH, Byggteknik och design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253799.
Full textFjärrvärme och bergvärme är idag två etablerade värmesystem som ofta ställs mot varandra. Syftet med det här arbetet är att redogöra vilka faktorer som påverkar valet av värmesystem under projekteringsstadiet och vilka kostnaderna som finns för respektive system. I arbetet har en typisk husmodel tagits fram och använts som grund för jämförelsen av båda systemen. Jämförelsen har dels gjorts i form av energiberäkningar i energiberäkningsprogrammet BV2 där värmebehov och myndighetskrav på energiprestanda har jämförts i olika geografiska områden i Sverige. Vidare har kostnadsberäkningar genomförts utifrån energiberäkningarnas resultat där investeringskostnader och årliga kostnader har ställts mot varandra. Resultatet av arbetet visar hur måttet på energiprestanda skiljer sig från den faktiska mängden köpt energi på grund ut av geografiska förhållanden. I de södra delarna i Sverige där den geografiska korrigeringsfaktorn understiger 0 straffas konsumenter genom att primärenergitalet höjs, till skillnad mot de norra delarna där primärenergitalet istället sänks. Utifrån kostnadsberäkningarna kan man dra slutsatsen att fjärrvärme, när den finns tillgänglig, är mer ekonomiskt fördelaktigt på kort sikt. Bergvärme å andra sidan är ett mer lönsamt alternativ på lång sikt.
Ek, Ella, Linnéa Hallgren, Victoria Runnäs, Gabriella Corbee, Moa Sandberg, and Tove Engvall. "Borra för bergkyla : Kloridhaltens påverkan på grundvattnet i Sunnersta." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-384479.
Full textSTUNS Energy Stories
Östman, Albin, and Rickard Eriksson. "Optimal uppvärmningsmetod för villor i Stockholmsförort." Thesis, KTH, Byggteknik och design, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215315.
Full textWhen choosing a heating system for a house it is important to weigh in the different prosand cons, because every system is good in its own way. Which heating system may be ofinterest, depending on the conditions of the house and its requirements?This thesis will compare district heating, geothermal heating and exhaust air heating on aspecific brand new house. The result will base on the heating systems costs, lifetime,maintenance and environmental impact.The result has proven that for this particular house, the exhaust air heating pump hasbeen dominant in the calculations performed.
Wernqvist, Jonas, and Kalle Cedervall. "Jämförelse av central och lokal uppvärmning av mindre bostadsrättsförening." Thesis, KTH, Byggteknik och design, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215429.
Full textToday, when the housing industry is growing faster than in a long time energy house holding is becoming more important for every day. Economic and environmental interests from house owners, when it comes to increasing energy prices and energy house holding, both leads to a more conscious house building. This includes the buildings U-value, energy smart installations and other energy saving arrangements.This examination paper has been written for Bjerking to investigate the possibility to centralize the heating in a housing society of several semi-detached houses instead of heating them locally with the standard solution, an exhaust air heat pump per apartment.This examination paper includes a few calculations of energy losses and life cycle costs for the different heating systems. It also includes a bit of statistic for different types of heating in Sweden.It has ended in cost calculations that can be used when thinking about and planning to build semi-detached houses with central heating.
Westin, Rasmus. "Värmeöverföring i bergvärmesystem : En numerisk analys av den ringformade koaxiala borrhålsvärmeväxlaren." Thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176915.
Full textEl-Homsi, Patric, and Bramstedt Fredrik. "Energikartläggning av ett bostadshus från 2016." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-76686.
Full textThe building in this survey was completed in October 2016 and is located at Kvarnvägen 31 in Gemla. The purpose of the study is to map the energy consumption and determine whether the installation of solar collectors is beneficial or not. The goal is to map the energy use in the building, report improvement measures and analyse the technical installations. The qualitative methods consisted of a study visit, site visits, review of drawings and an ocular survey of the building with a thermal camera. In order to calculate and analyse the building´s energy use, modelling of the building envelope components and technical installations were performed in VIP-Energy. The results of the energy survey shows that the calculated energy use for the building is similar to the projected energy use and the energy declaration places the building in energy class B. Many factors are of significant importance in optimizing solar collectors such as inclination angle, orientation and installation type. Having solar collectors installed proved to be beneficial both in terms of energy and cost if they are connected as proposed. HSB FTX is theoretically advantageous for both preheating of supply air and defrosting of the building's ventilation system. The enhancement proposals are to adjust the inclination angle of the solar collectors and to reconnect the heat input obtained from the solar collectors.
Hilbert, Wiman Sara. "Energibesparing med bergvärmepump och värmeväxlare : Månadsvisa beräkningar för ett nytt och ett äldre småhus i Västerås samt en jämförelse mot kraven för nära-nollenergibyggnader." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-54259.
Full textLehtonen, Joakim. "Energikartläggning av förskola : Underlag för energieffektiviseringsåtgärder av byggnaden Metreven samt fördjupning avseende potential för uppfyllande av Boverkets krav gällande nära- nollenergibyggnad." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-49029.
Full textPenttilä, Jens. "Temperaturzoner för lagring av värmeenergi i cirkulärt borrhålsfält." Thesis, KTH, Energiteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128951.
Full textDen termiska responsen för ett borrhålsfält beskrivs ofta med den dimensionslösa responsfunktionen kallad gfunktion.Responsfunktionen togs först fram som en numerisk lösning med SBM (Superposition Borehole Model).En analytisk metod, FLS (Finite Line Source) är också accepterad för framtagandet av g‐funktioner. I det här arbetetundersöks förutsättningarna att numeriskt ta fram g‐funktioner för cirkulära borrhålsfält genom att använda detkommersiella simuleringsprogrammet COMSOL Multiphysics. Den numeriska metoden är flexibel och kananvändas för alla typer av borrhålsgeometrier. Metoden att använda COMSOL valideras delvis genom att jämföraresultatet för ett kvadratiskt borrhålsfält innehållande 36 borrhål (6x6) med lösningar framtagna med FLS och meddimensioneringsprogrammet EED (Earth Energy Designer). Det senare har sin grund i Eskilsons SBM, ett av deförsta arbeten där begreppet g‐funktion introducerades. När metoden att använda COMSOL verifierats, jämförsden kvadratiska borrhålsmodellen med en cirkulär borrhålskonfiguration, upprättad med samma metod,innehållande 3 koncentriska ringar om vardera 6, 12, 18 borrhål. Slutligen undersöks hur den termiska responsenpåverkas då borrhålen i ett cirkulärt borrhålsfält kopplas samman och grupperas i radiella zoner med olika termiskalaster.
SEEC Scandinavian Energy Efficiency Co.
Ebrahim, Mila. "Performance Evaluation of a Photovoltaic/Thermal (PVT) Collector with Numerical Modelling." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302122.
Full textEn panel med kombinerad teknik av både solceller och termisk solfångare (PVT) kan producera både elektricitet och värme samtidigt. Forskning har visat att det kan finnas flera fördelar med att integrera PVT-paneler med ett bergvärmesystem, eftersom det mjliggör lagring av termisk energi över året. Dessutom leder ett sådant system till lägre drifttemperaturer som kan öka PVT-panelens effektivitet och livslängd. Syftet med studien är att presentera den elektriska och termiska prestandan av en PVT-panel utvecklat av Solhybrid i Småland AB för olika driftförhållanden som kan uppstå på grund av olika väderförhållanden och inlopps-temperaturer när panelerna är kopplade till ett bergvärmesystem. Vidare utvärderas prestandan för denna panel med ASHRAEmetoden (standard 93-2003), för att möjliggöra jämförelse med andra PVT-paneler. Modelleringsverktyget som använts i studien är mjukvaran COMSOL Multiphysics, som använder finita elementmetoden för att lösa partiella differentialekvationer i värmeöverförings-och flödesproblem. Baserat på prestandakurvorna som presenteras i resultatet, är den termiska och elektriska verkningsgraden approximativt 48.0-53.4% respektive 19.0-19.2% för en reducerad temperatur med värdet noll, en solstrålning mellan 800-1000 W/m2, för en massflödeshastighet på 0.026 kg/sm2 som beslutades som den mest lämpliga för att öka den termiska prestandan. Resultaten resulterade i en värmeavledningsfaktor (FR) och total värmeförlustkoefficient (UL) på 0.56-0.62 respektive 53.4-53.5 W/m2 K. Resultaten på PVT-panelens prestanda under olika väderförhållanden visar att vattnets inloppstemperatur kan påverka drifttiden och mängden termisk energi som kan extraheras under året avsevärt, speciellt i nordiskt klimat. För att bedöma korrektheten i resultaten och den skapade modellen rekommenderas experimentell testning av den studerade PVT-panelen.
Åslund, David. "PVT-panelernas plats i samhället : En vidareutveckling av Evertechs ETX-paneler." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-138788.
Full textGoblirsch, Amanda, Banaz Izat, and Rintanen Melinda Österblad. "Jämförelse av värmekällor : Byte av värmekälla i ett småhus ur ett energi-, ekonomi- och klimatperspektiv." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-55435.
Full textAndersson, Sara. "Energisparåtgärder i samband med påbyggnad av nya bostäder : En fallstudie av Röda längan i IDA ICE." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-122069.
Full textAs older buildings in our housing stock are in increasing need of extensive renovations, it further enhances our social requirements. It is then needed alongside with renovations to find whole measures that yields energy savings which also is financially profitable. In this report, we examine the possible energy savings alongside with the profitability of the energy measures connected with extensions of new housing on top of an existing housing. The current heating system of the building is replaced with geothermal heating, which is also working through to the ventilation system. Thereafter the building is extended with three new floors. The report also evaluates if an extension of new housing in the individual case is to be seen as an extension or a reconstruction, together with the demands of which are put on an altered building in accordance to PBL and BBR. With the help of the computational energy software IDA ICE, the affect from the different energy measures could be studied. The yearly economical savings was then compared to the cost of the different measures. The measures were deemed profitable if the value of the yearly savings exceeded the initial cost. For the specific case, the measures of energy savings gave an considerable improvement for the extension, both in energy but also in the economical sense. The investment of the extensions is to be seen payed via sales of apartments, and the payback on the actions taken on the existing building is estimated to within 10 to 15 years. for the individual case the possible yearly energy savings, after completed measures, is upwards of 74 percent, which translates to 130 kWh/m2 per year. This report also states that, in specific case, extensions of new housing is to be seen as an extensions and that four geothermal heating pumps are enough to reach sufficient energy savings together with economical profitability.
Öhlund, Martin. "Ekonomisk Optimering av Systemtemperaturer i Radiatorsystem." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176210.
Full textThe choice of temperatures in heating systems has long been a question for debate in Sweden. For the design engineer, the choice of system temperatures in a heating system has a decisive impact on the cost and in order to stay competitive on the market it is crucial to design the heating system as cost effective as possible. Historically the system temperature in Swedish heating systems has been 80/60 but today we see that the most common temperatures are 55/45. During the 1960´s Östen Sandberg became the leading advocate for a new type of heating system using a low flow principle (LF) for heat distribution. The LF principle requires a larger temperatur difference between the supply and return temperatures for the adequate heating. Advocates of the LF principle claims that large energy savings are possible if an exsisting high flow heating system (HF) undergoes an adjustment to a LF heating system. The question is how accurate is this claim? This article shows many advantages with the nowadays common 55/45-HFsystem. A 55/45-HFsystem has relatively low investment costs in comparison with other types of heating systems. Another advantage is the fact that the 55/45-HFsystem is compatible with both district heating and geothermal heat pump heating systems which makes this radiator system suitable as a standardized system. The most economical radiator system is the 80/60-HFsystem, which has a lower investment cost for both radiators and piping in comparison with a 55/45-HFsystem. The claim that LFsystems and the associated LF principle could result in a reduced energy cost for the heating system was not supported. This article shows that the energy savings that comes from the LF principle is negligible in comparison with the heating systems total energy cost. The LF principle could however reduce the risk of an uneven heating distribution in the building due to a more unpredictable regulation of the flow through the radiators. LFsystem disadvantage is an general overall larger investment cost in comparison with a HFsystem.