Made available in DSpace on 2015-05-08T14:59:44Z (GMT). No. of bitstreams: 1 Arquivototal.pdf: 5206307 bytes, checksum: 032db8e5ad423ee5a0fc6cfc786bd065 (MD5) Previous issue date: 2012-09-27 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The present study describes a theoretical and experimental analysis of the Prototype 01, this being an absorption refrigeration machine of simple effect with the pair water-lithium bromide as a working fluid and uses natural gas as an energy source for the steam generator, aiming the simulation of waste heat cogeneration. The unit has been developed and constantly improved in Rede Cooperativa de Pesquisa Norte/Nordeste do Gás Natural RECOGÁS-N/NE building present in Instituto de Energia Sustentável (IES) at the Universidade Federal da Paraíba. This unit has a carbon steel frame, using a stainless steel pipe. One goal of the study is an approximation of the results obtained experimentally in this study with the theoretical results for SANTOS (2005). In order to purpose validation was used Engineering Equation Solver (EES) software to obtain the properties, especially those inherent to the working fluid, using input data obtained experimentally. Still aims to expose inherent and unique aspects of an essentially experimental work, which will be addressed experimental methodology applied by the use of the materials used, the discussions regarding aspects of construction and operation of the unit, problems identified, interventions in the pilot plant and finally proposing solutions to some of the observed problems. / O presente estudo descreve uma análise teórico-experimental do Protótipo 01, este sendo uma máquina de refrigeração por absorção de simples efeito com o par água brometo de lítio como fluido de trabalho e que utiliza gás natural como fonte energética para o gerador de vapor, visando a simulação de cogeração de rejeitos térmicos. A unidade vem sendo desenvolvida e constantemente aperfeiçoada no prédio da Rede Cooperativa de Pesquisa Norte/Nordeste do Gás Natural RECOGÁS-N/NE, presente no Instituto de Energia Sustentável (IES) da Universidade Federal da Paraíba. Tal unidade possui uma estrutura de aço carbono, utilizando uma tubulação de aço inoxidável. Um dos objetivos do estudo visa uma aproximação dos resultados obtidos experimentalmente neste estudo com os resultados obtidos teoricamente por SANTOS (2005). Para efeito de validação, foi utilizado o software Engineering Equation Solver (EES) para a obtenção das propriedades, principalmente as inerentes ao fluido de trabalho, utilizando-se dados de entrada obtidos experimentalmente. Ainda visa-se expor aspectos inerentes e exclusivos de um trabalho essencialmente experimental, onde será abordada a metodologia experimental aplicada com o uso dos materiais utilizados, as discussões em relação aos aspectos construtivos e de funcionamento da unidade, problemas detectados, intervenções realizadas na unidade piloto e, por fim, a proposição de soluções de alguns dos problemas observados.

Made available in DSpace on 2015-05-08T14:59:46Z (GMT). No. of bitstreams: 1 ArquivoTotal.pdf: 3553755 bytes, checksum: 970cd8561fb907e2d361fd3f3d48f4ca (MD5) Previous issue date: 2013-08-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The present study presents a theoretical and experimental analysis of a cogeneration plant composed of one absorption chiller that uses technology NH3/H2O, a heat exchanger and a generator by natural gas. A thermodynamic model was developed in computational platform EES (Engineering Equation Solver) and it's based on ideal processes, information supplied by the engine manufacturer and the absorption chiller, as well as experimental results and literature. This work also aims to expose constructive characteristics, experimental methodology adopted, problems identified, interventions and the solutions adopted in the resolution of problems occurring. / O presente trabalho apresenta uma análise teórico-experimental de uma planta de cogeração, composta por um chiller de absorção que utiliza a tecnologia NH3/H2O, um recuperador de calor e um grupo gerador a gás natural. A modelagem termodinâmica foi desenvolvida na plataforma computacional EES (Engineering Equation Solver) e está embasada em processos ideais, dados fornecidos pelo fabricante do motor e do chiller de absorção, bem como em resultados experimentais e da literatura. Este trabalho visa também expor características construtivas, metodologia experimental adotada, problemas detectados, intervenções realizadas e as soluções adotadas na resolução dos problemas ocorridos.

Submitted by RENNER AUGUSTO TOLÊDO CAMPOS null (renneraugustocampos@gmail.com) on 2017-05-12T23:46:36Z No. of bitstreams: 1 Dissertação de Renner Campos - engenharia mecanica.pdf: 2528183 bytes, checksum: 3649363ab3dc4c5005953cf561fd4c6c (MD5) / Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-05-16T13:35:46Z (GMT) No. of bitstreams: 1 campos_rat_me_ilha.pdf: 2528183 bytes, checksum: 3649363ab3dc4c5005953cf561fd4c6c (MD5) / Made available in DSpace on 2017-05-16T13:35:46Z (GMT). No. of bitstreams: 1 campos_rat_me_ilha.pdf: 2528183 bytes, checksum: 3649363ab3dc4c5005953cf561fd4c6c (MD5) Previous issue date: 2017-03-23 / Sistemas de refrigeração são indispensáveis para o modo de vida do homem atual, porém o grande gasto energético, de fontes não renováveis, e os impactos ambientais, levam-nos a estudar e a pensar em outras fontes de energia, de preferência renováveis, e em outros ciclos de refrigeração com gasto energético menor. Este trabalho tem como objetivo a modelagem de um sistema de refrigeração por absorção de vapor para o conforto térmico de ambientes, verificando a viabilidade desse sistema de refrigeração para aplicação em salas de aula. No presente trabalho mostra-se o sistema de refrigeração como sendo umas das alternativas ao sistema de refrigeração por compressão de vapor, o qual possui um alto gasto energético. Para o funcionamento do sistema de refrigeração por absorção de vapor foi proposto a energia solar como fonte de energia térmica do gerador, pois em regiões como Rio Verde – GO (localizada na região de latitude 17°47’S e longitude 50°58’W, onde o clima tropical predomina em quase todos os meses do ano, com temperatura mínima de ~20 ° C e máxima de ~30 °C) o condicionamento do ambiente é imprescindível. Foi utilizado o software EES para a simulação e modelagem do sistema de absorção de vapor, baseado nas trocas de calor entre os componentes desse sistema, desprezando perdas energéticas e de pressões que ocorrem em um ciclo real de absorção de vapor. As simulações e resultados mostraram que, nessa região tropical, o clima é propício para o uso de energia solar e que sua transformação em energia térmica é suficiente para o funcionamento do gerador de um ciclo de absorção de vapor, viabilizando o conforto térmico do ambiente a ser refrigerado. / Cooling systems are indispensable for today's man's way of life, but the high energy expenditure from non-renewable sources and environmental impacts lead us to study and think about other sources of energy, preferably renewable, and in other refrigeration cycles with lower energy expenditure. The objective of this work is the modeling of a vapor absorption refrigeration system for the thermal comfort of environments, verifying the viability of this refrigeration system for application in classrooms. In the present work is shown the refrigeration system as one of the alternatives to the system of refrigeration by compression of steam, which has high energy expenditure. For the operation of the vapor absorption refrigeration system, solar energy was proposed as the generator's thermal energy source, since in regions such as Rio Verde - GO (located in latitude 17° 47' S and longitude 50° 58' W, where the tropical climate prevails in almost every month of the year, with a minimum temperature of ~ 20° C and maximum of ~ 30° C), the ambient air-conditioning is essential. EES software was used for the simulation and modeling of the vapor absorption system based on the heat exchanges between the components of this system, disregarding energy and pressures losses that occur in a real vapor absorption cycle. The simulations and results showed that, in this tropical region, the climate is favorable to use solar energy and its transformation into thermal energy is sufficient for the operation of the generator of a vapor absorption cycle, allowing the thermal comfort of the environment.

The diploma thesis aims to prepare a study of the cooling system of a multifunctional building with regard to climate change predicted until the middle of the 21st century. The work includes determining the heat load of refrigerated rooms and designing measures to reduce heat gains in the summer. Diploma thesis includes design of a cooling system with fan-coil units as end appliances with the necessary hydraulic calculations. A single-stage absorption cooling unit is used as the considered cooling source, to which a free cooling heat exchanger is assigned. The design of the cooling source includes the necessary hydraulic calculations and dimensioning of the system ensuring its functional operation. Part of the diploma thesis is drawing documentation of cooling technology and connection of fan-coil units.

LKAB behöver kyla till sina processer för att kunna förädla järnmalm. Ökad tillgång på elektronik och efterfrågan på komfortkyla breder ut sig i samhället idag, vilket leder till ett ökat kylbehov. Flertalet gamla kylanläggningar på LKAB i Kiruna börjar uppnå sin livslängd och behöver ersättas med nya maskiner och ny teknik. Då är utbyggnad av fjärrkylanätet som idag levererar kyla till KK4, KA3 och SAK-labb/kontor extra intressant. Istället för att ersätta gamla kylmaskiner i andra byggnader med nya kan man ansluta sig till de berörda fjärrkyalnätet. Det är ett nät där absorptionskylmaskiner och frikyla tillgodoser kylbehoven vilket även är ett bra val ur en miljömässig synpunkt då man nyttjar spillvärme. Idag klarar detta system av att leverera kyla till nuvarande kunder men frågan är hur mycket mer man kan ansluta till samma nät och vart begränsningarna ligger. Tittar man bara på kylmaskinerna ska man kunna ta ut 3MW kyla vilket är tre gånger så mycket som levereras idag. Begränsningarna ligger således inte där utan det är i de olika kretsarna till/från kylmaskinerna. I denna studie har mätvärden bakåt i tiden varit nödvändiga då endast frikyla använts under tidsperioden då detta examensarbete har utförts. Problem med loggning av data, felinställda givare och avsaknad av mätare har gjort att konkreta beräkningar uteblivit. Denna studie får ses som ett första steg mot en eventuell utökning av kylnätet. Konkreta förslag på hur man ska komma vidare för att kunna utnyttja nuvarande kylanläggnings hela potential tas upp i rapporten. Kan man i framtiden bygga ut fjärrkylnätet skulle man minska elanvändningen och underhållskostnaderna då man får ett färre antal kylmaskiner. / To refine iron ore products cooling is needed at LKAB. The increase of electronic devices and comfort cooling leads to higher cooling demands everywhere in society. Many old cooling machines soon are going to reach the end of their life span and needs to be replaced at LKAB in Kiruna. The development of the current district cooling grid is therefore interesting. Instead of replacing old machines in other buildings with new ones they can be connected to the existing grid. It is consisting of two absorption machines and free cooling and delivering cooling to the buildings KK4, KA3 and SAK-lab/office. The energy to the machines came from waste heat which is good for the efficiency and for the environment. Today the cooling system can manage the demands but how much can be connected to the grid in the future and where the limitations is for the current cooling system has yet no answer. The capacity of the absorption cooling is about 3MW and it is three times more than what is delivered today. So, the limitations are not the installed capacity but instead the different circuits in and out to the cooling machines. In this study previous measurements were important because only free cooling was used during this project. Problems with sensors, logging data and missing flowmeter made it impossible to do concrete calculations. Instead this study is a first step in the right direction to development of the district cooling system well as suggestions for future work. If the grid can be used to full potential the power consumption and the maintenance cost will decrease which is good for the environment and the economy.

Det här arbetets syfte är att ge förslag på ny kyllösning i en kommersiell fastighet. Den nuvarande lösningen innebär att kylan kommer ifrån tappkallvatten som spolas in i en värmeväxlare, den här lösningen är både dyr och har en negativ påverkan på vår miljö, fastighetsägaren är inte nöjd med detta och vill göra om systemet. Då det inte finns några direkta mätvärden från systemet förutom vattenförbrukningen så är effekt-och energibehovet en osäkerhet. Två driftfall har tagits fram där driftfall 1 och driftfall 2 har ett effektbehov på 80 kW respektive 130 kW. Utifrån driftfallen har effekt- och energiprofil tagits fram. Med hjälp av profilerna har en ny lösning tagits fram men med fyra olika metoder. Undersökningen tar upp lösningar med fjärrkyla, bergkyla, absorptionskyla och kompressorkyla. Fjärrkylan är idag inte ett möjligt alternativ då det fortfarande inte finns ett fjärrkylanät men diskussionerna pågår om ett sådant nät och på grund av detta är fjärrkyla med som en möjlig framtida lösning. Undersökningen visar att fjärrkyla inte är ett lönsamt alternativ, detta eftersom man behöver behålla nuvarande lösning fram till dess. Absorptionskyla är inte heller ett bra alternativ och det beror på det höga fjärrvärmepriset. Det visar sig att lösningen med bergkyla eller kompressorkyla är de bästa alternativen där en kompressordriven kylmaskin ses som den mest lönsammaste men ur en miljöaspekt är den det mindre bra även om den kylmaskin som används i denna undersökning använder sig av ett köldmedium med förhållandevis lågt GWP-värde. / This study’s purpose is to give suggestions of a new cooling system in a commercial building. The current system implies that the cooling come from tap cold water that flushes into a heat exchanger, this solution is both expensive and have a bad impact on the environment. The property owner isn’t satisfied with this and want to remake the system. There isn`t many measurement values that I can use to calculate the effect and energy needs for the building except the water consumption in the cooling system. Because of this uncertainty two cases have been used in this study. The first has an effect need of 80 kW and the other have an effect around 130 kW. From these two cases has an effect and energy profile been made from each of the two cases. With the profiles made, can a new solution be presented and in this study we have four different methods for the cooling system. An investigation has been made on district cooling, ground cooling, absorption cooling and compressor cooling. The district cooling isn`t possible today because it doesn’t exist but the local energy company having discussions about it and because of this, district cooling is a possible future solution. The study shows that to wait for a district cooling isn´t a profitable solution, neither is the solution with the absorption cooler, the absorption machine is being driven by district heat and the price is too high in Bollnäs. This study shows that ground cooling or compressor cooling are the best options in this case. The compressor cooling is the most profitable, but it has a downside in the environment perspective. All energy is based on electricity energy, and the refrigerant can affect the environment in a bad way if it´s a leak. But I should say that the cooling machine used in this study uses a refrigerant that has a relatively low GWP-value.

Garantir le confort thermique des bâtiments est directement lié à la consommation d'énergie. Dans les zones tropicales, les systèmes de refroidissement représentent l'un des postes les plus gourmands en énergie. Afin de réduire la consommation d'énergie mondiale, il est primordial d'améliorer l'efficacité de ces systèmes ou bien de développer de nouvelles méthodes de production de froid. Une installation de refroidissement solaire basé sur le cycle à absorption est une alternative pour réduire les émissions de gaz à effet de serre et la consommation d'électricité. Contrairement aux systèmes classiques de refroidissement à compression mécanique, la production de froid par absorption est un système complexe composé de plusieurs composants comme des panneaux solaires, un ballon de stockage, une tour de refroidissement et une machine à absorption. Outre le dimensionnement des composants, ce système complexe nécessite des actions de contrôle pour être efficace parce que la coordination entre le stockage d'eau chaude, la production et la consommation du froid est nécessaire. Le but de cette thèse est de proposer une structure producteur-consommateur d'énergie basée sur la commande prédictive (MPC). Le système de refroidissement par absorption solaire est considéré comme faisant partie de ce système de production-consommation d'énergie, le système de stockage d'eau chaude est le producteur et la machine à absorption qui distribue de l'eau froide au bâtiment est l'un des consommateurs. Pour que la structure de commande soit modulaire, la coordination entre les sous-systèmes est réalisée en utilisant une approche de partitionnement où des contrôleurs prédictifs locaux sont conçus pour chacun des sous-systèmes. Les contrôleurs des consommateurs calculent un ensemble de profils de demande d'énergie. Ces profils sont ensuite envoyés au contrôleur du producteur qui sélectionne le profil qui minimise le coût global. Dans une première partie, l'approche proposée est testée sur un modèle linéaire simplifié composé d'un producteur et plusieurs consommateurs. Dans une deuxième partie, un cas plus complexe est étudié. Un modèle simplifié d'un système de refroidissement à absorption est évaluée en utilisant l'outil de simulation TRNSYS. Le modèle de production n'est plus linéaire, il est décrit par un modèle non linéaire hybride qui augmente la complexité du problème d'optimisation. Les résultats des simulations montrent que la sous-optimalité induite par la méthode est faible. De plus, la performance de l'approche atteint les objectifs de commande tout en respectant les contraintes. / To guarantee thermal comfort in buildings is directly related to energy consumption. In tropical climates, cooling systems for buildings represent one of the largest energy consumers. Therefore, as energy consumption is a major concern around the world, it is important to improve the systems efficiency or seeking new methods of cooling production. A solar cooling installation based on the absorption cycle is an alternative to mitigate greenhouse gas emissions and electricity consumption. In contrast to conventional vapor-compression based cooling systems, the absorption cooling production involves a complex system composed of several components as collector panel, storage tank, cooling tower and absorption chiller. Besides the sizing of the components, this complex system requires control actions to be efficient as a coordination between hot water storage, cooling water production and consumption is necessary. The aim of this research is to propose a management approach for a production-consumption energy system based on Model Predictive Control (MPC). The solar absorption cooling system is seen as part of this production-consumption energy system where the hot water storage system is the producer and the chiller-building system is one of the consumers. In order to provide modularity to the control structure, the coordination between the subsystems is achieved by using a partitioning approach where local predictive controllers are developed for each of the subsystems. The consumer controllers compute a set of energy demand profiles sent to the producer controller which selects the profile that better minimize the global optimization cost. In a first part, the proposed approach is tested on a simplified linear model composed of one producer and several consumers. In a second part, a more complex case is studied. A simplified model of an absorption cooling system is evaluated using the simulation tool TRNSYS. The producer model is no longer linear, instead it is described by a nonlinear hybrid model which increases the complexity of the optimization problem. The simulations results show that the suboptimality induced by the method is low and the control strategy fulfills the objectives and constraints while giving good performances.

Garantir le confort thermique des bâtiments est directement lié à la consommation d'énergie. Dans les zones tropicales, les systèmes de refroidissement représentent l'un des postes les plus gourmands en énergie. Afin de réduire la consommation d'énergie mondiale, il est primordial d'améliorer l'efficacité de ces systèmes ou bien de développer de nouvelles méthodes de production de froid. Une installation de refroidissement solaire basé sur le cycle à absorption est une alternative pour réduire les émissions de gaz à effet de serre et la consommation d'électricité. Contrairement aux systèmes classiques de refroidissement à compression mécanique, la production de froid par absorption est un système complexe composé de plusieurs composants comme des panneaux solaires, un ballon de stockage, une tour de refroidissement et une machine à absorption. Outre le dimensionnement des composants, ce système complexe nécessite des actions de contrôle pour être efficace parce que la coordination entre le stockage d'eau chaude, la production et la consommation du froid est nécessaire. Le but de cette thèse est de proposer une structure producteur-consommateur d'énergie basée sur la commande prédictive (MPC). Le système de refroidissement par absorption solaire est considéré comme faisant partie de ce système de production-consommation d'énergie, le système de stockage d'eau chaude est le producteur et la machine à absorption qui distribue de l'eau froide au bâtiment est l'un des consommateurs. Pour que la structure de commande soit modulaire, la coordination entre les sous-systèmes est réalisée en utilisant une approche de partitionnement où des contrôleurs prédictifs locaux sont conçus pour chacun des sous-systèmes. Les contrôleurs des consommateurs calculent un ensemble de profils de demande d'énergie. Ces profils sont ensuite envoyés au contrôleur du producteur qui sélectionne le profil qui minimise le coût global. Dans une première partie, l'approche proposée est testée sur un modèle linéaire simplifié composé d'un producteur et plusieurs consommateurs. Dans une deuxième partie, un cas plus complexe est étudié. Un modèle simplifié d'un système de refroidissement à absorption est évaluée en utilisant l'outil de simulation TRNSYS. Le modèle de production n'est plus linéaire, il est décrit par un modèle non linéaire hybride qui augmente la complexité du problème d'optimisation. Les résultats des simulations montrent que la sous-optimalité induite par la méthode est faible. De plus, la performance de l'approche atteint les objectifs de commande tout en respectant les contraintes. / To guarantee thermal comfort in buildings is directly related to energy consumption. In tropical climates, cooling systems for buildings represent one of the largest energy consumers. Therefore, as energy consumption is a major concern around the world, it is important to improve the systems efficiency or seeking new methods of cooling production. A solar cooling installation based on the absorption cycle is an alternative to mitigate greenhouse gas emissions and electricity consumption. In contrast to conventional vapor-compression based cooling systems, the absorption cooling production involves a complex system composed of several components as collector panel, storage tank, cooling tower and absorption chiller. Besides the sizing of the components, this complex system requires control actions to be efficient as a coordination between hot water storage, cooling water production and consumption is necessary. The aim of this research is to propose a management approach for a production-consumption energy system based on Model Predictive Control (MPC). The solar absorption cooling system is seen as part of this production-consumption energy system where the hot water storage system is the producer and the chiller-building system is one of the consumers. In order to provide modularity to the control structure, the coordination between the subsystems is achieved by using a partitioning approach where local predictive controllers are developed for each of the subsystems. The consumer controllers compute a set of energy demand profiles sent to the producer controller which selects the profile that better minimize the global optimization cost. In a first part, the proposed approach is tested on a simplified linear model composed of one producer and several consumers. In a second part, a more complex case is studied. A simplified model of an absorption cooling system is evaluated using the simulation tool TRNSYS. The producer model is no longer linear, instead it is described by a nonlinear hybrid model which increases the complexity of the optimization problem. The simulations results show that the suboptimality induced by the method is low and the control strategy fulfills the objectives and constraints while giving good performances.

Master thesis deals with the utilization of waste heat from Nova Mosilana company. Theoretical part of this work is focused on the waste heat description (heat, heat quantity, heat temperature/quality, composition of waste stream) in which a considerable energy potential is hidden. The other parts describe waste heat technology, especially heat pumps, Organic Rankine Cycle (ORC) and system absorption cooling. Some of the technologies described in the theoretical part are used in the design of the more efficient existing waste heat utilization, especifically power and cold production.

Kyla produceras med ett antal helt skilda metoder. Denna rapport och fallstudie tar hänsyn till fyra metoder för kylning, kompressordriven-, absorptions-, fri-, och fjärrkyla. En del i problematiken är att systemen har mycket olika tekniska utformningar och krav på fastigheten, så som geografi och närhet till stora tekniska system som fjärrvärme och fjärrkyla. Kylsystemen jämfördes för att finna vilket kylsystem som var lämpligast samt vilket som hade den mest gynnsamma taxeringen för fastigheten. Kylsystemens lämplighet bedömdes framförallt efter underhållsbehov, men även storlek och ljudnivå. Fastigheten som utgör examensarbetets studieobjekt har ett kylbehov på 150 kW, vilket attribueras ett bageri, restaurang, kontor samt kylbänkar m.fl. Dessa har ett kylbehov under framförallt fyra sommarmånader, där kylbänkar m.fl även har ett kylbehov under resterande året. Flera studier har gjorts och pekar på att kylbehovet i framtiden kommer att öka, även om en exakt prognos inte kan ges. Det är även tydligt att alla de ovan nämnda kylsystemslösningarna har en roll att spela framöver. Examensarbetet har framförallt använt sig av en litteraturstudie för att besvara frågeställningarna. För litteraturstudien användes hemsidor som Discovery och ScienceDirect. För att beräkna energiförbrukning, drifttider och total kostnad så har Microsoft Excel använts. Framförallt för kylproduktion med kompressor, där det givna referensaggregatet har fyra olika driftfall beroende på kylbehov, varav ett är kylproduktion med frikyla. För att vikta frikylans andel har klimatdata från SMHI (2020) använts. Programmet har även använts för att sammanställa de tabeller och figurer som presenteras i resultatet. Prisförslag har givits efter personliga kommunikation per e-mail och telefonintervjuer med energiproducenter och tillverkare av kylaggregat. Resultatet visade att fjärrkyla var det för studieobjektet mest lönsamma alternativet, det står även för det system som är lämpligast då det är helt underhållsfritt för kunden. Anledningen till dess lönsamhet tillskrevs framförallt dess låga investeringskostnad. Att använda Gavleån för ren frikyla visade sig inte vara möjligt då temperaturen i ån är för hög sommartid. Även absorptionskyla visade sig vara olämpligt för studieobjektet då temperaturen i det lokala fjärrvärmenätet är för låg samtidigt som investeringskostnaden blivit hög. För absorptionskyla hade ett extra system behövts installeras, vilket rapporten inte kunnat prissätta. Rapporten visar däremot att metoden att producera kyla med absorptionsaggregat har potential att under rätt förutsättningar ersätta kompressorkyla. Detta för att minska dels belastningen på elnätet samt som ett sätt att minska CO2-utsläpp globalt, genom export av elektricitet till Europa. Detta arbete visar att dagens teknik är begränsad men att framtida teknik visar sig ha potential. Rapporten fann även att vidare arbete med vinning kunnat utföras för att identifiera absorptionskylas expansionspotential. / Cooling is produced with several completely differentiated methods. This report and case study considers four different methods of cooling, vapor-compression-, absorption-, free- and district cooling. A part of the problem is that the systems have vastly different technical configuration and requirement of a facility, such as geography and vicinity to other big technical system such as district cooling and district heating. The cooling systems are compared to find the method that is most suitable and has the most beneficial assessment. The different methods suitablitiy was graded based on, noise level, size and required maintenance. The facility that constitutes this thesis study has a cooling demand of 150kW, which is attributed to a bakery, a restaurant, an office and cooling benches etc. These have a cooling demand during four summer months, where cooling benches etc also have a demand during the rest of the year. Multiple studies showcase and point out that the cooling demand will grow in the future, even if a precise prognosis is not made. It is also clear that these above-mentioned cooling systems have a continuing role to play going forward. This thesis has foremostly used a literature review to answer the research questions. For the review webpages such as Discovery and ScienceDirect was used. To calculate the energy consumption, running hours and total yearly cost Microsoft Excel was used. Especially when cool produced with the compressor unit. The reference unit has four different operating modes depending on the cooling demand, one of the modes is production with free cooling. To value the share and impact that free cooling has, Microsoft Excel is used in combination with statistical data from SMHI (2020). Microsoft Excel is also used to compile the tables and figures in the “results” section. The pricing published in this report is based on personal communications per e-mail and phone interviews with energy producers and manufacturers of different cooling units. The result of the thesis show that district cooling is the most beneficial solution for cooling the facility. As well as the most suitable system since it is completely maintenance free for a customer. The reason for its profitability is attributed to its low investment cost. Using the nearby river for free cooling was deemed impossible because of its high temperature during the summers. Using absorption cooling was also considered unsuitable for the case object because of the low temperature in the local district heating network during summer times, as well as the high investment cost required because of it. To make absorption cooling suitable an additional system for cooling the processes would have to be installed, which this report has not been able to price.