Dissertations / Theses on the topic 'Frånluftsvärmepump'
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Nyman, Elin. "En frånluftsvärmepumps inverkan på ett fjärrvärmesystem : Jämförelse mellan byggnad med fjärrvärme och byggnad med kombination av frånluftsvärmepump och fjärrvärme." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-43621.
Full textIt has become more and more common to combine district heating with an exhaust air heat pump in Sweden, especially in multi-family dwellings. One reason that the exhaust air heat pumps are becoming more common is Boverket's rules on the amount of energy a dwelling can purchase, which today favors the exhaust air heat pumps. Another reason is that property owners want to reduce their energy costs by taking advantage of the energy from the exhaust air in the house, that otherwise would be lost. The work has been performed on behalf of WSP Process in Karlstad. The aim has been to provide a better understanding of how the connection of an exhaust air heat pump affects an existing district heating system in a multi-family dwelling in the municipality of Karlstad. This is seen from both the property owner's and the district heating supplier's perspective, focusing on energy and economy. A comparison has been made between two, in terms of size and energy use, equivalent multi-family dwellings in the municipality of Karlstad. One dwelling has exhaust air heat pump combined with district heating as heat source, while the other dwelling is heated only by district heating. Data for the two buildings have been used together with calculations to produce the results. It turned out that with an exhaust air heat pump installed, 49 MWh per year was saved in energy use. On an annual basis the two multi-family dwellings today uses just above and just below 200 MWh of heating energy each, which makes 49 MWh a huge energy save. The property owner's energy costs are 16 % higher for the dwelling with exhaust air heat pump and district heating in combination compared to the dwelling with only district heating, calculated over a period of 15 years. For the district heating supplier, the combination of the exhaust air heat pump and district heating raises the return temperature significantly (cooling deteriorates) in the district heating network. This is partly because the exhaust air heat pump is connected to the radiator system's return-side. To avoid the bad cooling, the exhaust air heat pump should instead be installed on the radiator system's forward conduit, which is a proposal that has been described in the report. The efficiency of heat transfer is better for the dwelling only supplied by district heating; 16,3 m3 heating water is pumped per MWh of sold district heating. This is compared to 19,1 m3 per MWh for the home with exhaust air heat pump and district heating in combination. This means that it is more profitable for the district heating supplier to sell district heat to the home supplied only by district heating that has higher heat transfer efficiency.
Ali, Rony. "Värmeåtervinning - styrning för frånluftsvärmepump i flerbostadshus." Thesis, Högskolan i Gävle, Avdelningen för elektroteknik, matematik och naturvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30041.
Full textBerglund, Beatrice. "Analys av dimensionerande temperaturer från värmeåtervinningsbatteri till frånluftsvärmepump." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-59065.
Full textThere are a large number of houses that have no heat recovery in the ventilation systems at present. There is an option to install heat recovery batteries to the exhaust air ducts that is connected to heat pumps in order to meet energy reduction targets for 2020 and 2050. The purpose of this project has been to investigate how energy consumption and annual cost depends on the design temperatures of the heat recovery battery. The parameters that have been investigated are normal variations of: - Exhaust air temperature - The moisture content in the exhaust air - Exhaust air flow over battery - Liquid flow over battery The overall coefficient of performance (COP) of the system has been studied for heat pumps with or without variable speed. The efficiency has also been investigated when solar panels are connected to the system. Two batteries have been simulated, a traditional battery from Luvata and one needle pipe battery from Retermia. The two heat pumps which have been investigated are one heat pump from IVT and one industrial heat pump with speed control from Kylma. Calculations and simulations have been made in the program Coils and Microsoft Excel. The cases that have been investigated are:Case 1: Luvata battery connected to Kylma heat pumpCase 2: Retermia battery connected to Kylma heat pumpCase 3: Luvata battery connected to IVT heat pump A comparison of annual costs for heating water with a heat pump system or with district heating was made. The results from the calculations for the batteries show that the Luvata battery can absorb more heat than the Retermia battery in most cases, because of its higher temperature efficiency, about 81 % compared to 71 %. The COP for Kylma were shown between 3.9 and 4.1 and for IVT between 2.6 and 2.8. Case 1 and case 2 will have the best options with a total COP of about 3.8 for every parameter variation, while case 3 gives a total COP of about 2.5 for every parameter variation, when the total COP of the system were calculated. In the calculations of which case that is most profitable the answer is case 2, with an annual cost divided by the produced thermal energy about 390 kr/MWh compared to the case where a district heating exchanger were installed about 640 kr/MWh. The total COP and the annual costs can be concluded that case 2, when Retermia battery is connected to a Kylma heat pump, is the best option based on the calculations that has been performed.
Wennberg, Tim. "Fjärrvärme och frånluftsvärmepump : Systemets lönsamhet och primärenergitalets inverkan." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29713.
Full textThe combination of district heating and exhaust air heat pump (EAHP) has become increasingly common in Sweden. This combined heating system is well suited for reducing energy use in existing buildings with mechanical exhaust air ventilation that lacks heat recovery. However, an EAHP installation can lead to higher return temperatures in the district heating network. In order to promote district heating use during the summer, the district heating supplier use seasonal varying price models in which the district heating price varies during some of the year. By shutting down EAHP in summer and only using district heating, there is a potential cost saving as the district heating price is at its lowest. This cost saving is investigated based on various types of district heating tariffs, electricity grid charges and electricity prices. It is also examined how Boverket's rules for calculating primary energy affects this type of heating system. Typical price models for district heating have been investigated. The energy use for six fictitious multi-dwelling buildings around the country has also been made. For each building, the energy use was calculated from three cases. For the reference case, Case 1, only district heating is used, for Case 2 EAHP is used for both heating and domestic hot water and Case 3 is as Case 2 fixed EAHP does not cover domestic hot water requirements and is switched off during the summer period. The energy consumption is calculated over a year and the energy cost is compared between the cases. In Case 2 and Case 3, the total energy costs for the buildings are between 61–75% and 67–78% of the energy costs in Case 1, respectively. However, between Case 2- and 3, there is no clear saving trend despite all the locations having a seasonally varying district heating price. The fact that no saving trend arises shows that the cost of each heat unit delivered from FVP in the summer is about the same as each heating unit of district heating. This is because a high COP (coefficient of performance) is used, which makes it very cost-effective to buy electricity. With a lower COP, shutdown of EAHP benefits summer time. Based on the calculated energy use, the primary energy and the specific energy use are calculated for all buildings. In most cases, the primary energy number is larger than the specific energy use, as the electricity consumption is going to be larger with primary energy. In Luleå, on the other hand, the energy-area ratio is greater than the primary energy number, even when using an EAHP.
Jakobsson, Oskar, and Max Green. "Jämförelse av frånluftsvärmepumpar." Thesis, Linnéuniversitetet, Institutionen för bygg- och energiteknik (BE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27101.
Full textFör att nå EU:s miljömål utförs många olika energieffektiviseringsåtgärder runt om i Sverige. I bostads och fastighetssektorn är ett exempel på en åtgärd installation av frånluftsvärmepumpar som återvinner värme i frånluften på fastigheterna och därmed sänker andelen inköpt energi. Den upptagna värmen kan användas för uppvärmning av radiatorer och tappvatten. Denna rapport syftar till att utvärdera och jämföra tre olika frånluftvärmepumpsystem med avseende på COP, täckningsgrad och kostnadsbesparing. Studien avgränsades till att endast beröra flerbostadshus.Teoriavsnittet beskriver de olika omständigheter och faktorer som påverkar en byggnads energibalans. Vidare beskrivs frånluftsvärmepumparnas funktion, begränsningar och fördelar gällande energibesparingar.Det första systemet finns på Västergatan 21 i Växjö och använder sig av återcirkulation av frånluften för att öka luftflödet genom värmepumpen. Det andra systemet på Toras väg i Karlskrona använder ett luftflöde som är en mix av från- och uteluft. Det sista systemet på Södra järnvägsgatan i Växjö använder endast ett rent frånluftsflöde.COP-verkningsgraden för de olika installationerna var 1,89 för Toras väg (genomsnitt), mellan 3,14 och 3,47 för Västergatan samt 3,80 för S. järnvägsgatan för respektive period. Täckningsgraden för installationerna låg i intervallet 56,3 – 91,0 % och kostnadsbesparingen var mellan 4 900 kr till 8 600 kr per månad för den observerade perioden.
Niklasson, Edvin, and Albin Coster. "Frånluftsvärmepumpens möjligheter i flerbostadshus." Thesis, Högskolan i Halmstad, Energiteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-22548.
Full textCizmeli, Claudia. "En jämförelse ur energisynpunkt mellan roterande värmeväxlare och frånluftsvärmepump i universitetsbyggnad." Thesis, KTH, Byggteknik och design, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128525.
Full textTo meet the renovated KTH building’s future requirements, the existing ventilation system will be replaced. Two different possible heat recovery systems have been compared in regards of district heating. The existing system of water coil heat exchanger has low heat recovery efficiency and Akademiska Hus wishes for a system with higher heat recovery. A rotating heat exchanger and exhaust air heat pump have been compared in regards of heating the supply air. At times when heat recoveries from these systems are not sufficient, the district heating will be in use. In the calculations five rotating heat exchangers and varying number of exhaust air heat pumps have been compared. Through this varying results will occur and the district heating demand will increase/decrease the fewer/more pumps that are taken into account. The exhaust air heat pumps are assumed to be both constant and down going. At the constant use of exhaust air heat pumps the results show that (when in maximum occupancy) the district heating demand with five rotating heat exchangers is lower than when using the five (or fewer) exhaust air heat pumps. During probable occupancy the district heating demand with five rotating heat exchangers is lower than when using two (or fewer) exhaust air heat pumps. The district heating demand is lower when using rotating heat exchangers than the “down going” numbers of exhaust air heat pumps. Only office- and apartment building acquired heating systems have been compared due to the high air flows. The selection of manufacturer of these systems may affect the district heating demand.
Nordenström, Erik. "Värmesystem i flerbostadshus: Kombinera fjärrvärme med frånluftsvärmepump : För ekonomisk och hållbar utveckling." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-48228.
Full textThe overall aim of the current EU strategy Sustainable Development is to identify and develop measures to ensure that quality of life can be constantly improved, both for present and future generations. A part of the strategy is the climate targets which in the first phase extend to 2020. Its Member States shall then have reduced both their energy use and greenhouse gas emissions by 20 %. In Sweden the residential and service sector stands for 40 % of the country's energy use, they have themselves set the target to 25 % savings. New policies and improved energy efficiency will lead to completion. An important area of development is the heating of buildings, which accounts for 60 % of the sector's energy use. A large part of the housing stock is considered to have an energy savings potential of 20-50 %. Next to the improvement of the building envelope, the selection of heating system is of great importance. More than 90 % of delivered heat energy to the apartment blocks in Sweden comes from district heating. By supplementing district heating with exhaust air heat pumps, the building's energy efficiency can be increased and building owners can make a financial gain in the reduced amount of purchased energy. District heating distributers have responded to this development by changing their subscriptions, making the heating system oversized much of the year, thereby the heat pump becomes more or less redundant. In this case study, the heating system of an apartment building in the town of Grums (Sweden) is of interest. The exhaust air heat pump was already installed before the district heating subscription was changed. The new district heating subscription implicates that property owners have to choose which maximum base effect they can get delivered all year round. An investigation is necessary to ensure that the selected option provides a stable and low cost at different temperature. From the property owner's perspective, the problem is of economic nature. This study however, concentrates on the combination of district heating with heat pumps seen from the energy use and sustainability aspect. Is the heating system working in the best way today, or it is possible to find alternative modes that work better? The target with this study is to find an operational mode that primarily will reduce fuel use by 25%, secondary will lower carbon dioxide generation and cut life-cycle cost of the heat pump and thirdly will reduce the amount of purchased energy. These targets must be achieved within the annual outside temperature of 5-7 ºC. Currently the exhaust air heat pump is used as basic heat, warming up radiators and domestic hot water while district heating covers the deficit of the house's heating demand. Current operating mode is compared with two alternatives. Option 1 involves a change of the heat pump, to one with more power, district heating will heat the domestic hot water and will continuously work as a backup for the heat pump. In Option 2, the operation mode is altered to optimize use of the district heating base effect, the heat pump runs only when the selected base effect does not cover the heating demand. Apart from that the heat pump is replaced in the first case, no reinstallation is required for these options. Study calculations are made by using Microsoft Excel and duration diagrams. The results shows that none of the options reach the targets completely, however, Option 1 is closer considering that the primary goal (saving resources) is reached in part. The study shows that heating systems in apartment buildings, similar to the reference object, can be adjusted as well as the choice of base effect (district heating) in order to successfully reduce environmental effects and/or achieve financial gain. Increased use of district heating indirectly reduces carbon dioxide generation but increases resource use. Replacement of exhaust air heat pump reduces purchased energy which leads to reduced use of resources and better economy, however, will increase electricity consumption, which gives a marginal addition contribution of carbon dioxide generation.
Holmqvist, Patrik, and Arvid Fasth. "Energiåtervinning med frånluftsvärmepump i flerbostadshus : Simulering av ventilationsförluster och potentiell besparing, Spättan 1." Thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-86230.
Full textSvanqvist, Christian. "Inkopplingsalternativ för frånluftsvärmepumpar : Analys av flerbostadshus i Kungälv." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-66448.
Full textBlomqvist, Mattias. "Energianalys av flerbostadsfastighet : Lämpliga åtgärder för att minska byggnadens energianvändning." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10287.
Full textKlang, Kristoffer. "Energianalys av ett flerbostadshus med kombinerad fjärrvärme och frånluftsvärmepump : Åtgärdsförslag på energi- och kostnadsbesparingar för fastigheten Sicklaön 173:1, Stockholm." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-19887.
Full textKarlberg, Madeleine. "Uppvärmning med fjärrvärme och frånluftsvärmepump i småhus : En energi-, miljö- och kostnadsanalys för bostadsområdet Lindbacka i Gävle." Thesis, Uppsala universitet, Institutionen för samhällsbyggnad och industriell teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-440906.
Full textGustafsson, Olle, and Johan Karlsson. "Resurseffektiv energieffektivisering av flerbostadshus : Frånluftsvärmepumpar i kombination med fjärrvärme." Thesis, Linköpings universitet, Energisystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119214.
Full textErson, Jakob. "Att spara på värme : Energieffektiviseringar i fjärrvärmeanslutna flerbostadshus från miljonprogrammet i Uppsala." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-300689.
Full textDjärv, Oskar. "Åtgärdsplan för energieffektiviseringav ett flerbostadshus från 1940-talet : En fallstudie av Vindelgatan 15 i Ludvika." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-263240.
Full textSjöström, Caroline. "Uppvärmning av nybyggda villor - med solfångare och pellets." Thesis, Jönköping University, JTH, Civil Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-12492.
Full textBoverket har från och med januari 2010 skärpt energikraven vid nybyggnation. De nya kraven har tillsammans med stigande energipriser och ett ökat miljömedvetande i samhället, satt fokus på att bygga täta och välisolerade hus. Detta beskrivs i arbetets inledning. Samtidigt bör husets uppvärmning och ventilation vara energieffektiv och förnybara energikällor användas, som solenergi och biobränslen. Syftet med rapporten är att analysera om solfångare i kombination med en pelletspanna eller -kamin är ett bra alternativ för uppvärmning av nybyggda villor från VärsåsVillan AB. I rapporten diskuteras detta ur ett miljö-, drifts- och ekonomiskt perspektiv.
Solfångare levererar gratis värme utan miljöpåverkan under drift. Mina beräkningar visar att de kan täcka 30 % av uppvärmningsbehovet i ett lågenergihus. Med stigande energipriser lönar sig solfångare i längden.
Pellets är ett förädlat biobränsle med högt energivärde, som med modern utrustning bör betraktas som ett klimatsmart alternativ för småskalig uppvärmning. Solfångare och pellets är en bra kombination både miljö- och driftmässigt. Under sommarhalvåret svarar solfångarna för ca 90 % av uppvärmningen, vilket innebär att pannan eller kaminen stängs av. Under vinterhalvåret blir pelletseldningen effektivare, vilket ger en renare förbränning än under sommaren.
Som bas i ett sol-pelletssystem används en 300-750 liters tekniktank, med en elpatron som reserv. Detta ger ett flexibelt system, där gratisenergin från solfångarna utnyttjas i första hand. Även under vår- och höstmånaderna kan värmetillskottet från solfångarna bli relativt stort.
Fyra av VärsåsVillans kataloghus valdes till en studie. Husens energianvändning med ett sol-pelletssystem, respektive nya frånluftsvärmepumpen Nibe F750, har beräknats och jämförts. Eftersom nybyggda hus i regel inte har något pannrum är en vattenmantlad kamin ett bra alternativ. Efter påfyllning fungerar den helautomatiskt som en panna, samtidigt som den skapar en trivsam inomhusmiljö.
Beräkningarna visar att de studerade husen uppfyller energikraven (BBR) med god marginal om de värms med ett sol-pelletssystem. Om en ventilationsvärmeväxlare installeras sänks behovet av köpt energi med 20-30 kWh/m² och år. Slutsatsen är att ett flexibelt uppvärmningssystem och ett effektivt ventilationssystem ger en energisnål och miljövänlig totallösning, både idag och med tanke på framtidens osäkra energipriser. Solfångare och en vattenmantlad kamin är tillsammans med en ventilationsvärmeväxlare därför en intressant lösning i lågenergihus, framförallt på landsbygden. I tätbebyggda områden är fjärrvärme och solfångare ett lika bra uppvärmningsalternativ.
Sol-pelletssystem kan i dagsläget inte konkurrera med frånluftsvärmepumpen ekonomiskt. Investeringskostnaden är betydligt högre, medan driftskostnaderna blir likvärdiga. Samtidigt är frånluftsvärmepumpen ett bekvämare alternativ, vilket gör den till ett attraktivt val för uppvärmning av nybyggda villor.
From January 2010, the National Housing Board has tightened the energy requirements to new buildings in Sweden. The new requirements have together with rising energy prices and an increased environmental awareness in the community, put focus on building tight and well-insulated houses. This is described in the report’s introduction. At the same time heating and ventilation need to be energy efficient and renewable energy sources ought to be used, as solar energy and bio-fuels. The aim of the report is to analyse if solar panels and pellet is a good combination to heat newly built one-family houses from VärsåsVillan AB. The report discusses this from an environmental, operational and economic perspective.
Solar panels produce free heat without environmental impact during operation. The calculations show that they can cover 30 % of the heating needs in a low energy house. With rising energy prices, solar panels are profitable in the long run.
Pellet is a processed bio-fuel with a high energy content, as with modern equipment is considered as a climate-smart option for small-scale heating. Solar panels and pellet is a good combination, both environmentally and operationally. During the summer half, the solar panels answers for 90 % of the heating needs, which means that a boiler or stove during this time is not in use. In the winter pellet heating becomes more efficient, resulting in less emissions than in summer.
The base in a solar-pellet system is a technique tank at 300-750 litres, with an electric heater as backup. This provides a flexible system, using the free energy from the solar panels at first. Even during spring and autumn, solar panels can give a relative large contribution of heat.
Four of VärsåsVillan’s houses were selected to a study. The houses’ energy use with a solar-pellet system and a new exhaust air heat pump, Nibe F750, has been calculated and compared. As new houses usually do not have a boiler room, a water-jacketed stove is a good solution. After loading with pellet, it works fully automatic as a boiler, while creating a pleasant indoor environment.
The calculations show that the studied houses will meet the energy requirements (in BBR) with a good margin, when they are heated with a solar-pellet system. If a ventilation heat exchanger also is installed, the need for purchased energy is reduced with 20-30 kWh/m² and year. The conclusion is that a flexible heating system and an efficient ventilation system provides an energy efficient and environmentally friendly total solution, both today and in view of future uncertain energy prices. Solar panels and a water-jacketed stove is together with a ventilation heat exchanger, therefore an interesting solution for low energy houses, especially in rural areas. In urban areas, district heating and solar panels is an equally good alternative.
Today, a solar-pellet system cannot compete economically with the exhaust air heat pump. The investment cost is considerably higher, while the operating costs will be equivalent. The exhaust air heat pump is also a more comfortable alternative, which makes it to an attractive choice for heating of newly built one-family houses.
Säker, Robin. "Lönsamheten för energiåtervinning i ventilation Kv. Bordsgossen : Undersökning kring lönsamheten av att installera energiåtervinning i ett 60-tals flerbostadshus." Thesis, Högskolan i Gävle, Energisystem, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-24045.
Full textSince the oil crisis in the 1970’s the western world has sought to find energy-efficient methods for heating in real estate. In the EU, the housing sector accounts for about 40% of the total energy demand, and the single largest part of man's ecological footprint is carbon dioxide emissions, primarily through the use of fossil fuels in which the energy sector has historically accounted for a large part of its emissions. Oil has in the terms of heating almost entirely been phased out and over the last 30 years the ventilations development has seen a great deal of progress where the market constantly strives for better efficiency and environmentally friendly techniques. The industry has managed to almost at full extent to remove fossil fuels as a source of heating for housing. On the ventilation side, the technique has come so far that systems start returning from large complex systems to the simpler systems that is optimized, for example, exhaust air heat pumps (EHAP). Exhaust air heat pumps are expected have a good future ahead where the efficiency of the pumps, the so-called COP-value (coefficient of performance), is predicted to be doubled. Kv. Bordsgossen is a multi-family house in central part of the city of Gävle and consists of five houses divided into 53 apartments and on the ground floor consists of offices and retail premises. The property, which dates back to 1963, has no energy recovery and the property owner, Svedinger Fastigheter wants to change this. This report has investigated whether there is profitability for a exhaust air heat pump in the property's apartments, as well as the profitability of heat exchanger for the property's garage as well as for the premises that accommodate the company Arkitektkopia. The result shows that, at the estimated installation cost, there is a good economy in installing exhaust air heat pump in the property as well as installing heat exchanger in the part inhabited by Arkitektkopia, and in the facilities garage. What the property owner needs to take into consideration is that the estimated installation costs necessarily isn’t correct, but should be considered as a direction point. Svedinger Fastigheter also needs to keep an eye on the possible flow rate that the local district heating distributor is considering applying. Should it be applied it is predicted to have a huge impact on the economical earnings in energy efficient technology. Furthermore, the ventilation is in needs of a adjustment and if the property owner decides to move on with a window change it will affect the property's thermal comfort and energy needs.
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.
Edström, Johan, and Samuel Hammar. "Framtagning av beräkningsmodell för uppvärmningssystem : med fokus på kombinationen fjärrvärme och frånluftsvärmepumpar." Thesis, Högskolan Väst, Avdelningen för maskinteknik och naturvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-9834.
Full textAs a result of the EU's environmental 2020 goal, the Swedish government and municipal boards has put up internal goals to reduce energy consumption. EU 2020 goal aims to reduce energy consumption in Europe by 20 percent by the year 2020 from that the target was set in 2010. At the municipal level, this has meant that private but mainly public housing properties have been required to review their energy use. The work in this report is based on one of the savings measures that have been taken, which is to supplement existing district heating systems with exhaust air heat pumps. The project aims to develop a calculation model for evaluation and computation for this type of system. To create a reliable basis for decisions, efforts were made to produce just calculations. Existing computational models are focused on economic factors and thus takes little consideration of technological aspects and environmental factors. The aim of the work has been to create a computational model which more closely reflects the real situation and demonstrates a more informative decision basis. The work began with a literature review which included relevant research and basic facts about exhaust air heat pumps and district heating systems. The calculation model has been developed continuously during the project in which new functions and new information constantly has been added. The project has resulted in a working computational model which includes many more parameters than previous reviewed models. Together with the client three sub goals were set up for the model, these were: To intuitively present information and data. To create a transparent structure which is simple to follow. To create a flow through the model, which follows a desired work process. These goals are considered to have been fulfilled in the developed calculation model, however, it's possible to further develop this model. The model could, for example, be supplemented with more automated optimization calculations and be adjusted to handle other kinds of heating systems.
Bengtsdottir, Fanney, and Norrman Christel Hagerup. "Att bygga energisnålt med olika ventilationssystem." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-76634.
Full textA ventilation system in a building provides sufficient amount of fresh air and create a negative pressure to reduce moisture-related problems. Today several ventilation systems, some with different energy recovery, are available and those inherence different features and limitations. This study examines differences between exhaust air ventilation without heat recovery (F), exhaust air heat pump (FVP) and exhaust and supply air ventilation with a rotating heat exchanger (FTX) in nearly zero-energy houses. Three single-family houses in Kronoberg County were strategically chosen for the data collection, measurements, interviews and calculations to evaluate and compare their system’s performances in terms of thermal comfort, air circulation, heat recovery effects, energy use and financial attractiveness. The results show that the criteria for thermal comfort are satisfied and the specific energy consumption are within the current requirements in all these houses. Under the period of investigation, the house without heat recovery requires minimum quantity of electricity for ventilation system where as the house with FVP is the most energy efficient. Also, the house with an FVP shows to be the most cost-efficient with lowest accumulated costs. The results are limited for a specific outdoor climate during the studied period. Therefore, examinations over a longer term in different contexts are recommended for a more comprehensive view.
LEFFLER, OSCAR, and NASSIF MANSOUR. "A Study of Energy Saving Actions in Older Buildings in Sweden." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240673.
Full textModern teknik inom energibesparing blir allt mer mognare, lättare att implementera och finansiellt lönsamt. Både den europeiska unionen och den svenska regeringen har direktiv med mål för energibesparing för år 2020 och 2030. Här spelar byggnader en viktig roll, då byggnader står för ca 40 % av den totala energianvändningen i Europa. Att bygga nya, nära noll energi byggnader är för närvarande väldigt populärt. Men i ett land som Sverige, där majoriteten av alla byggnader är äldre byggnader, kommer majoriteten av energianvändningen fortfarande från dessa. Därav finns det stora incitament till att genomföra energieffektiviserande åtgärder på äldre byggnader i Sverige. Från tidigare studier och intervjuer med energikonsulter kan det fastslås att energibesparande åtgärder ej genomförs i den grad som det är möjligt. Målet med denna rapport är att utröna varför det är så samt vilka huvudsakliga hinder som kan relateras till energibesparing i äldre byggnader. För att få en överblick av den befintliga situationen samt hur olika intressenter ser på denna fråga genomfördes en fallstudie bestående av åtta intervjuer med energikonsulter och fastighetsägare. Resultaten från studien pekade på att det finns en vilja bland fastighetsägare att gå vidare med energibesparande åtgärder. På senare tid har även en förståelse vuxit fram bland fastighetsägare där man inser att det även finns stora finansiella incitament med att implementera energibesparande åtgärder på äldre byggnader. Detta har dock ännu ej lett till att energibesparande åtgärder genomförts på en majoritet av befintliga byggnader. En anledning till detta är att varje byggnad måste hanteras individuellt då alla har olika förutsättningar och därmed lämpar sig för olika energibesparande lösningar. Andra faktorer inkluderar teknisk och ekonomisk kunskapsbrist bland vissa fastighetsägare, långsamma beslutsprocesser och ägarstrukturer. Studien nyttjar teorier relaterade till beslutsfattning för att ge läsaren en överblick av den befintliga situationen kring energibesparing i Sverige. I tillägg bidrar studien till den teoretiska litteraturen om beslutsfattning.