This work suggests a new multiple ejector refrigeration cycle operated by an NGL Recovery Plant's waste heat as a replacement to the mechanical compression refrigeration cycle. This will result in significant power reduction and CO2 emission reduction. / Typical NGL plant compresses its feed to a high pressure (3040 kPa). The feed gas compressors’ discharge reaches approximately 150 OC. After that, the feed is cooled by three-stage propane vapour compression refrigeration cycle. This paper examines various options for thermal power cooling in such plants in order to eliminate part of the propane chilling system. Since most of the new plants are located in desert climates, typical designs based on absorption refrigeration are not very efficient. Design proposed in this work employs ejector refrigeration and it is based on 45 OC air as a cooling media (summer conditions in hot climates). Performance factor has been defined as the total cooling provided by the refrigeration system over the total cooling required in the 1st cooling stage of the NGL Recovery Plant. Cooling based on a single N-pentane ejector cycle with N-pentane has COP of 0.342 and performance factor (ƞ) of 0.842. Multistage ejector N-pentane refrigeration system has COP of 0.714 and performance factor (ƞ) of 1.053. For a typical 750 Million scf/d NGL plant, the new design saves $12 Millions in capital costs and $1.5 in annual electricity cost. / Thesis / Master of Applied Science (MASc)

District heating (DH) is of great significance for the Nordic countries due to the high heat demand especially in the winter. In Finland, 40% of heat was generated by fossil fuels in DH system, and DH sector emits 10% of the total emissions. The Finnish government aims to achieve carbon neutrality as the national goal by 2035. This study aims to evaluate the decarbonization objectives of each city (i.e. Helsinki capital city, Espoo and Vantaa) in the Helsinki metropolitan area and their influences on DH oper-ation from 2010 to 2030 by energyPRO. A model of a joint DH system with the interconnec-tions between Helsinki-Espoo and Helsinki-Vantaa is developed, in order to describe the whole Helsinki metropolitan area DH under the decarbonization objectives. The study pro-vides a least-cost DH operation solution while matching the supply and demand conditions. The optimum performance of the DH is simulated considering different operation strategies (technical aspect), operation expenditures (economic aspect), CO2 emission (environmental aspect). The results are presented from 2010 to 2030 in five years intervals. From the technological option, heat pump has great potential operating in DH in the Helsinki metropolitan area, it will be turned from peak load producer to the baseload heat producer. Instead, heat pro-duced by combined heat and power plants (CHPs) will not be dominant in DH system in the future year. Waste incineration power plant in Vantaa will increase the total annual opera-tion time to about 7000h, it will export more heat to Helsinki city when heat transmission is allowed. From the economic aspect, average heat production cost will decrease with more biomass penetration and heat recovery technology implemented in the future year. Natural gas may appear less profitable with higher CO2 prices after phasing out the coal. About cli-mate change impact, CO2 emission has an 88% reduction in 2030 compared with 2010. / Fjärrvärme (DH) har stor betydelse för de nordiska länderna på grund av det höga värmebe-hovet, särskilt på vintern. I Finland genererades 40% av värmen, i DH-systemet av fossila bränslen och DH-sektorn släpper ut 10% av de totala utsläppen. Finlands regering strävar efter att uppnå koldioxidneutralitet som ett nationellt mål år 2035. Denna studie syftar till att utvärdera målen för koldioxidutsläpp för varje stad i Helsingfors storstadsområde (d.v.s. Helsingfors huvudstad, Esbo och Vanda) och deras påverkan på DH-drift från 2010 till 2030 av energyPRO. En modell av ett gemensamt DH-system med sammankopplingarna mellan Helsingfors-Esbo och Helsingfors-Vanda utvecklas för att beskriva hela Helsingfors storstadsregions DH under målen för koldioxidutsläpp. Studien ger en billig DH-driftslösning samtidigt som utbud och efterfrågan stämmer överens. Den optimala prestandan för DH simuleras med beaktande av olika driftsstrategier (teknisk aspekt), driftskostnader (ekonomisk aspekt), CO2-utsläpp (miljöaspekt). Resultaten presenteras från 2010 till 2030 i femårsintervaller. Från det tekniska alternativet har värmepumpen en stor potential i DH i huvudstadsregionen, den kommer att förvandlas från topplastproducent till baslastvärmeproducent. Istället kommer värme som produceras av kraftvärmeverk inte vara dominerande I DH-systemet under det kommande året. Avfallsförbränningsanläggningen i Vanda kommer att öka den totala årliga drifttiden till cirka 7000 timmar, den kommer att exportera mer värme till Helsingfors när överföringen tillåts. Ur ekonomisk aspect kommer den genomsnittliga värmeproduktionskostnaden att minska i takt med större penetration av biomass samt värmeåtervinningsteknik som imple-menteras under det kommande året. Naturgas kan verka mindre lönsamt med högre koldi-oxidpris efter att kolet fasats ut. Vad gäller klimatförändringarnas påverkan så minskar koldioxidutsläppen med 90% år 2030 jämfört med 2010.

Wind energy technologies are considered to be among the most promising types of renewable energy sources, which have since attracted broad considerations through recent years due to the soaring oil prices and the growing concerns over climate change and energy security. In Kuwait, rapid industrialisation, population growth and increasing water desalination are resulting in high energy demand growth, increasing the concern of oil diminishing as a main source of energy and the climate change caused by CO2 emissions from fossil fuel based energy. These demands and challenges compelled governments to embark on a diversification strategy to meet growing energy demand and support continued economic growth. Kuwait looked for alternative forms of energy by assessing potential renewable energy resources, including wind and sun. Kuwait is attempting to use and invest in renewable energy due to the fluctuating price of oil, diminishing reserves, the rapid increase in population, the high consumption of electricity and the environment protection. In this research, wind energy will be investigated as an attractive source of energy in Kuwait.

It is very likely that human being is contributing to the process of global warming. Industrial activities such as cement production are among the largest sources of human-induced greenhouse gas emissions. Therefore, there are ongoing efforts to reduce the CO2 emissions attributed to the cement production. In order to be able to systematically identify, classify, and evaluate the most effective, applicable, and feasible CO2 improvement measures, it is essential to have an assessment framework, which has an environmental management perspective. Such a framework should be able to cover the widest range of potential CO2 improvement measures, therefore it has to have a wide system perspective and consider all material, and energy flows within the industry as useful resources. The first part of this thesis uses the concepts of Industrial Ecology and Industrial Symbiosis as the supporting theoretical concepts for developing such assessment framework. The framework has semi-qualitative approach for assessing different measures and is developed in two parts: (1) generic and (2) site-specific assessment. The first part considers general aspects of the measures such as level of Industrial Symbiosis (i.e. complexity of business approach), the potential of each measure for reducing CO2 emissions, and their technological maturity. The second part assesses the feasibility of the measures regarding the conditions of a specific cement producing system. Aspects such as organizational applicability, technical and infrastructural applicability, and the existing level of implementation of each measure are considered. In the second part of this thesis, the developed framework is applied on a selected cement production system which is a cluster composed of three cement plants in Germany (owned by CEMEX) referred to as the Cluster West. The result of the assessment provides insights about the state-of-the-art of CO2 improvement measures in cement industry in general and also demonstrates which of these measures are most (or least) suited for development in the Cluster West. The production system of the Cluster West has effectively applied CO2 improvement measures in areas such as producing blended cement products, using alternative fuels (and renewable fuels) for clinker production. In addition, its clinker production (the Kollenbach plant that is part of the Cluster West) has relatively good energy efficiency. According to the results of the assessment, CO2 improvement measures such as co-generation (producing electricity from excess heat of the plant), using renewable fuels, using alternative materials for clinker production, and increasing the usage of alternative fuels are among the most applicable choices for further implementation. / In relation with LIU-CEMEX Indsutrial Ecology project (2011)

This research studies the relationships in Electric Energy Consumption, Carbon Dioxide Emission and Theil Index in Brazil. The period of analysis includes annual data from 1980 to 2011 in a total of 31 observations. The series presented order of integration equal one with the presence of cointegration thus to measure these influences we used a vector error correction model (VEC). By Function Impulse Response (FIR) and Variance Decomposition Analysis (ADV) we observed how each variable behaves to an abrupt change. To analyze the behavior of variables, methods of vector autoregressive (VAR) and residues control charts were used. The VAR modeling revealed that there is a significant interrelationship among the variables under study, thus showing that there is a short-term relationship between these variables. As for the residues control chart to individual measures, a problem in the original variables was avoided tha were the the autocorrelation, and showed that all variables had a period of instability and also enabled the identification of this period. The emission of carbon dioxide and Theil Index are determining factors in the explanation of environmental impacts as well as the development of the country. The variance decomposition indicates that the carbon dioxide emission is primarily responsible for mainly caused damage to the environment. / Esta pesquisa estudou as relações existentes no Consumo de Energia Elétrica, Emissão de Dióxido de Carbono e Índice de Theil no Brasil. O período de análise se refere a dados anuais de 1980 a 2011 perfazendo um total de 31 observações do Brasil. As séries apresentaram ordem de integração igual a um com a presença de cointegração, assim, para mensurar essas influências foi utilizado um modelo de Vetor de Correção de Erros (VEC). Por meio da Função Impulso Resposta (FIR) e Análise de Decomposição da Variância (ADV) foi possível verificar como cada variável se comporta a uma mudança abrupta. Para analisar o comportamento das variáveis, foram utilizadas as metodologias de vetores auto regressivos (VAR) e gráficos de controle de resíduos. Já a modelagem VAR revelou que há um inter-relacionamento significativo entre as variáveis em estudo, mostrando assim que há uma relação de curto prazo entre estas variáveis. Quanto aos gráficos de controle de medidas individuais aos resíduos, contornou-se um problema presente nas variáveis originais que era o de autocorrelação, e mostrou-se que todas as variáveis apresentaram um período de instabilidade o que também possibilitou a identificação deste período. A Emissão de Dióxido de Carbono e o Índice de Theil são fatores determinantes na explicação dos impactos ambientais, assim como no desenvolvimento do país. A decomposição da variância indica que a Emissão de Dióxido de Carbono é o principal responsável pelos danos causados principalmente ao meio ambiente.

Made available in DSpace on 2016-12-23T14:37:30Z (GMT). No. of bitstreams: 1 Lucas Contarato Pilon.pdf: 1648966 bytes, checksum: cac40ef638ed16eaccc0afa53f321565 (MD5) Previous issue date: 2013-02-28 / Diante da necessidade de obter informações sobre o cultivo de cafeeiros arborizados, o objetivo do trabalho é avaliar a relação dos atributos químicos, físicos e os componentes da matéria orgânica do solo sob cultivo de café consorciado com diferentes espécies arbóreas, comparativamente ao café cultivado a pleno sol, tendo como referência uma área sob floresta. O trabalho foi conduzido em sistemas de produção de café, numa propriedade familiar, município de Nova Venécia - ES. O solo da área é um ARGISSOLO AMARELO Distrocoeso típico, cultivado com café conilon consorciado com árvores, nos seguintes sistemas de uso e manejo: 1) café sem consórcio (pleno sol), 2) café consorciado com nim (Azadirachta indica), 3) café consorciado com cedro australiano (Cedrela fissilis) e 4) café consorciado com teca (Tectona grandis). Foi utilizado um solo de área florestal, como referência. A amostragem do solo foi realizada nas seguintes profundidades: 0,0 0,05; 0,05 0,10; 0,10 0,20; e 0,20 0,40 m, avaliando-se atributos químicos (pH, P, K, Ca, Mg, Al, H+Al, N, C total, C ext em água, C biomassa microbiana e emissão de CO2) e físicos do solo (granulometria, densidade do solo e de partículas, porosidade total, macro e microporosidade, estabilidade de agregados, resistência do solo à penetração e umidade do solo). A avaliação do carbono solúvel (C ext) e do carbono da biomassa microbiana do solo (CBMS) foi realizada em duas épocas (março e setembro/2012) nas profundidades de 0,0 0,05 e 0,05 0,10 m; já a emissão de CO2 foi medida na mesma época que, na presença e ausência de serapilheira. Os resultados experimentais mostram que os sistemas de uso e manejo apresentam comportamento diferenciado para grande parte dos atributos estudados. O solo florestal apresenta maiores teores e estoques de carbono orgânico total e nitrogênio total, 19,8 e 1,99 Mg ha-1 respectivamente, além de maior teor de carbono na biomassa microbiana (518,8 μg g-1 solo em março e 364,8 μg g-1 solo em setembro). Os atributos dos solos sob cafeeiros consorciados, de maneira geral, não diferem do solo sob cafeeiro a pleno sol, exceção feita para os atributos Mg, N e o C ext, C-BMS, quociente microbiano (qMic) na duas épocas de coleta, os quais são superiores nos consórcios agroflorestais, e o quociente metabólico (qCO2) inferior, denotando maior estabilidade dos cafeeiros arborizados. O café a pleno sol mostra-se um agroecossitema mais perturbado com maior qCO2 (1,81 μg CO2 C-BMS-1 h-1 em março e 2,44 μg CO2 C-BMS-1 h-1 em setembro). A proteção do solo ocasionada pelo sombreamento das árvores e a deposição de serapilheira influencia principalmente os atributos biológicos estudados, favorecendo um maior equilíbrio nos cafeeiros arborizados. Com relação aos atributos físicos, o consórcio proporciona menor densidade do solo, maior porosidade total e macroporosidade do solo, diferindo do café a pleno sol. Os cafeeiros consorciados se diferem somente na agregação do solo. A resistência do solo à penetração é influenciada pela umidade do solo, com destaque para o café a pleno sol que apresenta valores mais baixos desse atributo, em função da irrigação, que eleva a umidade do solo. O estudo numa condição de Argissolo coeso, mostra que 5 anos de implantação de sistemas arborizados são suficiente para apresentar pequenas mudanças nos atributos estudados, no entanto para atributos de alta sensibilidade, como os biológicos, são suficientes para apresentar mudanças mais consistentes dos sistemas de uso e manejo / Faced with the need for information on the coffee agroforestry systems, the objective is to evaluate the relationship of the chemical, physical and components of soil organic matter under coffee intercropping with different tree species, compared to the full-sun coffee with an area under forest like reference. The research was conducted in coffee production systems, a family farm, in Nova Venécia city - ES. The soil is an YELLOW ULTISOL Distrocohesive typical, with shadow coffee plantation, the following different land use systems and management: 1) coffee full (full-sun), 2) coffee intercropped with neem (Azadirachta indica), 3) coffee intercropped with Australian cedar (Cedrela fissilis) and 4) coffee intercropped with Teca (Tectona grandis). It was used a soil of forest area, as a reference. Soil sampling was conducted in the following depths: 0.0-0.05, 0.05-0.10; 0.10-0.20, and 0.20-0.40 m, evaluating chemical soil attributes ( pH, P, K, Ca, Mg, Al, H + Al, total nitrogen (TN), total organic carbon (TOC), water-soluble carbon (WSC), soil microbial biomass carbon (SMBC) and soil CO2 emission and physical soil attributes (particle size, bulk density, total porosity, macroporosity, microporosity and soil resistance penetration), was collected and characterization of accumulated litter. The evaluation of soluble carbon (soluble C) and soil microbial biomass carbon (SMBC) was held twice a year (March and september/2012) at depths from 0.0-0.05 and 0.05-0, 10 m, the soil CO2 emission was measured at the same times, in the presence and absence of litter. The experimental results show that the use and management systems were characterized for most attributes researched. The forest soil has higher levels of stocks and TOC and TN, 19.8 and 1.99 Mg ha-1 respectively, and the higher SMBC (518.8 mg g-1 soil in March and 364, 8 mg g-1 soil in September). The soil under shadow coffee, in general, do not differ from full-sun coffee, except for the attributes Mg, N and soluble C, SMBC, microbial quotient (QMIC) at both harvests, which are higher in agroforestry systems, and attributes TOC/ soluble C and metabolic quotient (qCO2) lower values, indicating greater stability of shadow coffee systems. The full-sun coffee shows more disturbed agroecosystem with high qCO2 (1.81 μg CO2 CBMS-1 h-1in March and 2.44 μg CO2 CBMS-1 h-1 in September). The protection of soil caused by shading from trees and litterfall influences the biological attributes primarily, favoring a greater balance in shadow coffee. Relative to physical attributes, the intercropped provides a lower bulk density, higher total porosity and macroporosity, differing full-sun coffee. The shadow coffee up differs only in soil aggregation. The soil resistance penetration is influenced by soil moisture, especially for full-sun coffee which shows lower values of this attribute, depending on irrigation management, which increase soil moisture. The study provides a ULTISOL cohesive, shows that 5 years of systems implementation, are enough to present small changes in the attributes studied, however high sensitivity to attributes such as biological changes are sufficient to represent most consistent use and management systems

Kyoto University (京都大学) / 0048 / 新制・課程博士 / 博士(工学) / 甲第16790号 / 工博第3511号 / 新制||工||1531(附属図書館) / 29465 / 京都大学大学院工学研究科都市環境工学専攻 / (主査)教授 松岡 譲, 教授 米田 稔, 准教授 倉田 学児 / 学位規則第4条第1項該当

To reduce fossil fuel consumption and carbon emission in the building sector, renewable and low carbon energy technologies are integrated in building energy systems to supply all or part of the building energy demand. In this research, an optimal supervisory controller is designed to optimize the operational cost and the CO2 emission of the integrated energy systems. For this purpose, the building energy system is defined and its boundary, components (subsystems), inputs and outputs are identified. Then a mathematical model of the components is obtained. For mathematical modelling of the energy system, a unified modelling method is used. With this method, many different building energy systems can be modelled uniformly. Two approaches are used; multi-period optimization and hybrid model predictive control. In both approaches the optimization problem is deterministic, so that at each time step the energy consumption of the building, and the available renewable energy are perfectly predicted for the prediction horizon. The controller is simulated in three different applications. In the first application the controller is used for a system consisting of a micro-combined heat and power system with an auxiliary boiler and a hot water storage tank. In this application the controller reduces the operational cost and CO2 emission by 7.31 percent and 5.19 percent respectively, with respect to the heat led operation. In the second application the controller is used to control a farm electrification system consisting of PV panels, a diesel generator and a battery bank. In this application the operational cost with respect to the common load following strategy is reduced by 3.8 percent. In the third application the controller is used to control a hybrid off-grid power system consisting of PV panels, a battery bank, an electrolyzer, a hydrogen storage tank and a fuel cell. In this application the controller maximizes the total stored energies in the battery bank and the hydrogen storage tank.

Dans le contexte du réchauffement climatique global, les institutions académiques et internationales comme GIEC et de nombreux pays ont proposé des objectifs de réduction des émissions de CO2. L'objectif de cette thèse est d'évaluer ces objectifs gouvernementaux en les comparants avec les objectifs globaux à l'aide de différentes méthodes d'allocations lesquelles correspondent à différents principes d'équité en matière d'émissions carbones.Afin d'évaluer les feuilles de route technologique permettant d'obtenir les réductions d'émission de CO2 nécessaires, un modèle qualifié de flexible est proposé à destination des décideurs. Notre modèle permet d'éviter les opérations informatiques complexes et peut être personnalisé en fonction de différents besoins. Les simulations sont réalisées jusqu'à l'horizon 2050 lequel est souvent considéré comme un pivot dans les habitudes de consommation d'énergies notamment. Dans cette thèse, des feuilles de route technologique pour les différents objectifs gouvernementaux en matières d'émissions de CO2 sont étudiées pour trois pays : la Chine, la France et les États-Unis. Le modèle couvre les principaux secteurs responsables des émissions de CO2 et étudie l'influence de différentes technologies sur le mix énergétique. Diverses méthodes et approches sont utilisées dans notre modélisation. L'identité IPAT est utilisée pour la décomposition des émissions dans les secteurs de l'énergie. Le modèle STIRPAT permet quant à lui d'évaluer l'évolution des émissions de CO2 dans les scénarios Business-as-Usual. Le modèle SVR est utilisé dans le cadre des projections de production d'électricité. Enfin, l'indice de Theil est employé pour mesurer les inégalités d'émissions de CO2 par tête. A la différence des modèles plus classiques en économie de l'énergie, notre modèle propose des feuilles de route technologiques selon différents critères, comme par exemple avec le développement « équilibré » de la technologie entre les secteurs, ou le critère de disponibilité des ressources énergétiques. Par ailleurs, l'équité carbone, avec la convergence des technologies dans les secteurs à long terme, peut être mise en œuvre dans notre modèle et joue, dans ce cas, comme une contrainte supplémentaire dans l'optimisation multi-objectifs.Nos résultats montrent que les objectifs gouvernementaux en France et aux États-Unis sont « très stricts » car, pour les atteindre, tous les secteurs doivent réaliser des efforts importants de réduction de CO2. En revanche, l'objectif gouvernemental de la Chine s'avère « plus facile » à réaliser car les progrès dans les technologies qui sont nécessaires sont moins exigeants.Plus précisément, si on prévoit que le mix énergétique reste inchangé en Chine et aux États-Unis, le CSC deviendra indispensable dans le secteur de l'énergie. Pour la France, 80% des voitures devront être remplacées par des véhicules électriques afin d'atteindre son objectif en matière de CO2.Toutefois, en considérant l'équité carbone entre secteurs, la combustion du charbon est censée être réduite de deux tiers en Chine et devra être pratiquement éliminée aux États-Unis. Par contre, le gaz peut être encouragé dans son utilisation dans le secteur de l'énergie en particulier aux États-Unis. Concernant le secteur du transport, plus de 60 % des véhicules doivent être remplacés par des véhicules électriques en Chine. Cette part serait d'environ 90 % en France et aux États-Unis.Enfin, la sensibilité des paramètres du modèle a été testée pour simulations, à chaque étape du travail, et pour toutes les roadmaps technologiques. Les résultats des tests de sensibilité montrent que la production d'électricité et l'intensité d'émissions sont les deux paramètres dont l'influence est la plus importante sur les émissions futures de CO2. Ainsi l'amélioration de l'efficacité de la combustion du charbon et de l'efficacité énergétique de l'électricité joueront un rôle central dans la réductions des émissions de CO2. / In the context of global warming, academic institutes, international institutions such as the IPCC, and governments of numerous countries have proposed global objectives of reducing CO2 emissions and announced national targets. The purpose of this thesis is to assess the governmental targets in comparing with the global objectives of various allocation methods, which correspond to different carbon equity principles.In order to evaluate the technology roadmaps which are necessary to achieve these reductions of CO2 emissions, a flexible modeling framework is proposed for policy makers. Our sectoral model avoids the complex computing operations. It can be customized according to different requirements and situations. We simulate the model up to the horizon 2050, which is often seen as a turning point in energy use patterns worldwide – forced by the probable decline in hydrocarbons extraction.In the thesis, the technology roadmaps for the governmental targets on CO2 emissions are studied for three typical countries: China, France, and the United States. The model covers the sectors responsible for the greatest part of CO2 emissions: power, transport, residence and industry sector, in studying the impacts of the principle energy technologies, such as energy mix, Carbon Capture and Storage (CCS), electric vehicles and energy efficiency.Various methods and approaches are used in our modeling. IPAT identity - which assumes the environment Impact is the results of Population, Affluence and Technology - is employed in the power sector emission decomposition. Besides STIRPAT - for Stochastic Impacts by Regression on Population, Affluence and Technology - model is used for the projection of CO2 emissions in the Business-as-Usual scenario. Then SVR - for Support Vector Regression - is used to forecast electricity production. Finally, the Theil index is employed as the measurement of per capita CO2 emission inequality. Different from classic cost-effective energy system models, our model provides the technology pathways for different criteria, such as balanced development of energy technology across sectors, availability of energy resources, etc. Besides, the carbon equity is employed as one of the constraints in the multi-objective optimization, under the consideration of the convergence of technologies in sectors in the long-term.Our results show that the governmental targets in France and the United States prove very strict, as they require all sectors to make large efforts in reducing CO2 emissions. In contrast, the governmental target in China seems more easily achievable, as the necessary advances of technologies are less demanding. More precisely: if the energy mix is expected to be kept unchanged in China and in the United States of America, the CCS prove indispensable in the power sector. In France, 80% of automobiles are required to be changed into electric vehicles, in order to get the target of CO2 emissions.However, under the sectoral carbon equity consideration, coal combustion is projected to be reduced by two thirds in China, and it will have to be almost eliminated in the United States to achieve their CO2 reduction target. But gas is encouraged to be used in the power sector, especially in the United States. Regarding the transport sector, more than 60% of vehicles should be replaced to electric vehicles in China, and this share will be about up to 90% in France and the United States.Finally the sensitivity of parameters in the model is tested for a robust simulation, at each step of the work, and for all technology roadmaps. The results of the sensitivity tests show that electricity production and the emission intensity of production are the two parameters with the most important influence on CO2 emissions. Thus improving the efficiency of coal combustion and the energy efficiency of electricity will play an important role in the CO2 emission reductions.

Introduction: The world is facing an economic crisis that has led to high energy prices in the EU. These high energy prices have been a contributing factor to the challenging economic situation in Sweden, affecting businesses, industries, and households. EU countries have limited access to energy and rely mostly on imports. The key objective is to reduce these costs through the utilization of renewable energy resources. Geothermal ventilation, in particular, is an efficient and promising source. However, this system has not yet been implemented in Sweden. The aim of this study is to investigate and analyze the effectiveness of horizontal ground geothermal ventilation systems in the context of Swedish conditions.Method: This study includes quantitative and qualitative data from a case study. Data collection involved literature study, interviews with various stakeholders, and simulations using Ansys software to analyze air flows and temperature conditions.Results: This section presents the results of a comprehensive study on basic geothermal ventilation in villas, carried out in accordance with Swedish environmental regulations. Interviews with representatives from ventilation companies and Jönköping municipality showed mixed opinions about the system's potential. While some expressed interest and approval due to energy savings and environmental adaptation, others had concerns about profitability and cost-effectiveness. Testing the system's efficiency using thermal exchange simulation software showed lower-than-expectedresults, indicating the need for further improvements. However, despite its lower efficiency, the geothermal ventilation system was still considered an environmentally friendly alternative to conventional methods, helping to reduce the environmental impact of the construction industry.Analysis: Ground geothermal ventilation system meets Swedish environmental standards and contributes to energy savings in new buildings. Although the system meets the standards, further improvements are needed to increase efficiency. Requirements and prerequisites include the right insulation classes and specially manufactured ground pipes. Implementation in villas can be challenging due to costs and heat delivery. Despite this, the system improves indoor air quality and reduces energy consumption, even if the temperature differences may be smaller than expected.Discussion: In this chapter, the results and conclusions from the study are discussed. Despite limited research on the subject, the study shows that shallow geothermal ventilation has potential, but there are challenges and limitations for implementation in Swedish villas. The method choice of literature review and qualitative interviews was appropriate to achieve the purpose, but more participants and research are needed to increase validity and reliability. Recommendations are given for further research in the area.