Price Of Fuels Research Articles

Techno-economic Analysis of Biogas Conversion to Liquid Hydrocarbon Fuels through Production of Lean-Hydrogen Syngas

Large-scale biogas plants are a viable source of CH4 and CO2 to be converted efficiently into high-value products. Specifically, production of liquid hydrocarbons can enhance the availability of green fuels while achieving significant CO2 reductions on site. In this study, the production of liquid hydrocarbons is simulated by dry reforming of biogas into lean-hydrogen syngas, further converted in CO hydrogenation and oligomerization reactors. The process was modeled by using CHEMCAD based on published experimental results with the projected feed composition. A high molar feed ratio of CO2/CH4 (>1.7) was set for the reformer to minimize steam requirement while avoiding carbon formation and reaching an optimal H2 to CO molar ratio (0.7). Two options were techno-economically evaluated based on a biogas plant with a capacity of 5000 N m3/h that produces between 13.8 and 15.7 million liters per year of blending stock for transportation fuels. The economics of the process depends mainly on the cost and availability of the biogas. The minimum selling price of the liquid fuels is $1.47/L and $1.37/L for options 1 (once-through conversion of syngas to liquid fuels) and 2 (recycle of tail gas from oligomerization reactor), respectively, and can be significantly reduced in case the biogas throughput is increased to >20 000 N m3/h. Recycling of the tail gas (option 2) yielded higher productivity, resulting in higher carbon yield (77.9% on the basis of methane) and energy efficiency (67.1%). The economic viability of the process can be improved by implementing CO2 tax or other incentives to reduce capital investment. It provides a potential route for efficient conversion of biogas into liquid hydrocarbons to meet the increased demand for renewable fuels as blending stock in the transportation sector while improving the sustainability of the plant.

Optimization of diesel engine performance and emissions with biodiesel-diesel blends and EGR using response surface methodology (RSM)

The rising price of conventional liquid fuels and increasing pollution drive research into alternate bio-fuels. In the present study, waste cooking soybean oil (WSCO) was collected from local restaurants and food processing industries. The 92% biodiesel yield was obtained by using a homogeneous transesterification process. A detailed experimental and analytical study of the engine performance and emissions with binary fuel blends of WSCO biodiesel and ultra-low sulfur diesel (ULSD) has been performed using response surface methodology. Binary blends were prepared by adding 20–35 v.% of WSCO to ULSD; experiments were carried out at 0–15% EGR. To analyze the effects of input variables on BSFC, BTE, smoke, NOx, CO, and HC, regression models were developed and confirmed to be statistically significant. The binary blend of B35 with 15% EGR (B35EGR15) showed the maximum desirability (0.928). The model's adequacy was validated by a confirmation test with an error in prediction below 6%. For blend B35EGR15, BSFC was increased by 6.61% and BTE was reduced by 5.30% for B35EGR15 as compared to ULSDEGR0 (ULSD at 0% EGR). Smoke and NOx emissions were decreased by 19.09% and 59.04%, while CO and HC emissions were increased by 17.54% and 11.76%, as compared to ULSDEGR0. The economic analysis showed that the operation cost was reduced by 23.34% for B35EGR15 as compared to ULSDEGR0. The B35EGR15 blend can be used in existing diesel engines with no engine modifications.

The territorial ordering for the diversification of the electrical system. case study: Isla de la Juventud

In the year 1882 when the first power plant designed by Thomas Edison began operations in Wisconsin, United States, the price of fuels was little more than symbolic and there was no knowledge about the environmental damage caused by the energy exploitation of fossil fuels. Currently the situation is completely different, with an unstable and expensive oil price, as well as an environmental awareness forged in the consequences of the over-exploitation of natural resources, the structuring of a sustainable energy matrix constitutes a challenge that is sustained in the use of renewable energies available territorially. For this, it will be necessary to bring the techniques and tools of territorial planning closer to the tasks of energy development, on the basis of achieving adequate planning of the space for the use of the endogenous energy resources of the territories. The objective of the work consists of proposing the application of a methodology for the study of the application of renewable sources, starting from determining the viable physical areas for their introduction, applying techniques of land use planning through a GIS. The Isla de la Juventud is a special municipality of the island of Cuba with significant renewable potential, however, the limitations inherited from traditional development models restricts the sustainable development of the territory from being achieved. In the period from 2010 to 2014, two projects were carried out to contribute to the diversification of the energy matrix, through the application of a territorial energy development model. This article takes up the main results of these projects, considering that they are currently valid. In this sense, an analysis of the energy matrix on the Isla de la Juventud was carried out at present and the projections until 2030, from a perspective of land use planning; with the aim that can get constituted as a guide for organization and planning of the integrative process of the renewable energies, in the diversifying process of the energetic matrix of Cuba.

Exploration of Various Microbial Systems for the Biofuel Production

Fuels on a broad scale are divided into two categories based on their renewability, i.e., renewable and non-renewable. The increasing scarcity, prices of fossil fuels, and the constantly increasing level of CO2 in the environment have led to an immediate need to investigate alternative fuels. Microorganisms are extensively being used for the generation of biofuels. The qualities of E. coli to be accessible to culture and maintenance have made it stand out among the microbes. Their ability to metabolize pentoses further draws it near to being used for biofuel production. Fermentative bacteria, particularly the class clostridia (obligate anaerobe), have been successful hydrogen producers. Dark fermentation employed by clostridia has dual advantages, i.e., production of biohydrogen and waste reduction since clostridia can utilize a broad range of substrates, including organic wastes. Moreover, the application of metabolic engineering can provide additional processes to clostridia required for the efficient production of biobutanol. The review further explores the two yeast systems, conventional and non-conventional systems. Synthetic biology tools have explored the traditional system, which comprises Saccharomyces cerevisiae for commercial purposes. The non-conventional yeast system has several advantages over the conventional ones, like ethanol tolerance, thermotolerance, inhibitor tolerance, and genetic diversity. However, the application of synthetic biology tools is still being explored in microbes like E. coli, Clostridia species, Saccharomyces cerevisiae, and Yarrowia lipolytica. The review also incorporates excellent commercial strain features like economical fuel tolerance, inhibitor tolerance, and thermotolerance control on redox balance and yield increases. The main focus is to bridge the gap between lab-scale production and commercialization.

An economic and environmental assessment of biofuel produced via microwave-assisted catalytic pyrolysis of forest residues

The conversion of forest residues into biofuels will enhance the decarbonization of the transportation sector and help the world reach its net-zero targets. Microwave-assisted catalytic pyrolysis (MACP) is an emerging thermo-catalytic conversion technology which, when coupled with low-carbon electricity, will result in negative emissions. The work described here assessed the economic feasibility and environmental impact of a novel MACP system for co-production of upgraded biofuel and high-quality biochar from forest residues. The cradle-to-gate (CTG) carbon intensity of MACP biofuel ranged from −57.3 to 27.4 g CO2-eq/MJ respectively when using either low-carbon electricity or carbon-intense electricity. Compared to petroleum fuels, a 43% to 162% reduction of GHG emissions could be achieved depending on electricity mix and methods to treat biochar co-product. The use of electricity to produce MACP biofuel as compared to directly charge electric vehicles was justified as a preferred use based on the finding that the advanced utilization of waste biomass via MACP could contribute significantly to GHG reduction of transportation fuel without sacrificing the travel distance of vehicles. The minimum selling price (MSP) of MACP biofuel was $1.02/L in the absence of any policy support and could be reduced to a comparable price of petroleum fuels at $0.53/L or increased to $1.32/L depending on the co-product revenue from biochar’s higher or lower-value applications. MACP biofuel could also be priced competitively with petroleum fuels by as early as 2026 under the planned carbon tax schedule in Canada. This co-production of upgraded biofuel and value-added biochar could bring flexibility to the biorefinery to seek the highest possible economic and environmental benefits facing the changing market and policy.

Economic and environmental analysis of algal biorefinery for the production of renewable fuels and co-product

• Techno-economic and life cycle analysis of spirulina-based algal biorefinery is developed. • A minimum selling price (MSP) and GHG emissions are calculated for various pathways. • MSP of renewable fuels is found in the range of US$ 2.5/GGE - $3.94/GGE for various pathways. • GHG emission is found in the range of −59.2 - 147.4 g CO 2-eq /MJ for various pathways. The present study involves techno-economic and life cycle analysis of the production of renewable fuels with co-product from Spirulina platensis using hydrothermal liquefaction method (HTL). In the baseline pathway, the production of renewable fuels from HTL of spirulina is considered along with the utilisation of HTL aqueous phase being recycled back to the algal cultivation system. Various other pathways such as the utilisation of aqueous phase from HTL by catalytic hydrothermal gasification (CHG) and anaerobic digestion (AD) and the production of co-product of C-Phycocyanin (C-PC) (food grade pigment) from the spirulina are studied. Mass and energy balances of the various pathways are conducted using process engineering data available in the literature. It is found that the minimum selling price (MSP) of renewable fuels for the baseline pathway is 3.94 US$/GGE, whereas other pathways show 3.81 US$/GGE, 3.97 US$/GGE, and 2.5US$/GGE for CHG, AD, and C-PC extraction pathways, respectively. A global warming potential of total GHG emissions shows −59.2 g CO 2-eq /MJ, −20.2 g CO 2-eq /MJ, −49.2CO 2-eq /MJ, and 147.4 g CO 2-eq /MJ for baseline, CHG, AD, and C-PC extraction pathways, respectively. These values match with the literature. Further, the sensitivity study is conducted to obtain the most important parameters which are influences the MSP of renewable fuels.

Household Ability of Expenditures on Electricity and Energy Resources in the Countries That Joined the EU after 2004

The purpose of the following article is to present the situation of the energy market from a household perspective between 2010 and 2020 in selected EU countries (the group of member states which joined EU after 2004). The selected countries when joining the EU had similar economic indicators and to some extent were similar in other macro-economic situations (personal income, unemployment rate, GDP level and annual growth). This article analyzes the past and current situation of the household ability expenditure on electricity and energy resources (petrol—eurosuper 95 and diesel and natural gas), taking into account price, tax conditions and the real possibility to purchase the analyzed energy sources (based on annual net salaries). The paper includes the conclusions and prospects for the future. The main objective of the study is to determine the ability amount of expenditure on electricity, natural gas and liquid fuels by household in the countries that joined the European Union after 2004. The specific objectives of the work include: the evolution of retail prices of energy sources in those countries and prices of electricity, natural gas and liquid fuels—petrol and diesel oil—in the research period from 2010 to 2020. The element that influences the final price, as assessed in this paper, is the share of taxes and compulsory charges imposed by the EU countries covered in this study. The result of the study presented inter alia that energy consumption structure did not change significantly, electricity prices were steadily growing in the countries under assessment, the use of liquid fuels—petrol and diesel oil—in the countries under study, grew over the study period. Furthermore, prices of fuel fluctuated over the period from 2010 to 2020 and during the COVID-19 pandemic, which broke out in March 2020, but did not cause any significant changes in the prices of energy carriers in the analyzed period, apart from the declines in the prices of eurosuper 95 and diesel.

Data Intelligence in Public Transportation: Sustainable and Equitable Solutions to Urban Modals in Strategic Digital City Subproject

Transport infrastructure investments must be linked to the public transport demand strategically. User behavior and decision-making process bring several possible alternative transportation options due to a series of factors that define it. Municipalities must manage these factors to promote equal and sustainable transport solutions through urban infrastructure, public transport competitiveness, and attractiveness, and fossil fuels use and pricing policy. The research objective is to determine these factors to monitor and use them for citizens’ benefit by means of analytical tools and methods to gain a superior knowledge of reality with a focus on improving investments and services in an agile and efficient manner. Methodologically, the number of passengers of main Curitiba’s (Brazil) bus rapid transit (BRT) lines is operated in two linear regression models combined with the number of private vehicles, public transport fare, and fuel price for the period between January/2010 and December/2019. Research analysis indicates direct causal relationships between the studied factors and that the necessary data for decision-making is available in the government information systems. In conclusion, urban management and strategic digital city project can be more balanced and assertive in transport infrastructure investments and citizen services provision.

Optimal sizing of smart hybrid renewable energy system using different optimization algorithms

Hybrid renewable energy (HRE) sources have become a popular alternative in isolated and rural locations; because of the increased prices of fossil fuels and their CO2 emissions. This paper investigates the application of recent optimization methods to dedicate the optimal configuration of HRE sources. These HRE sources comprise photovoltaic (PV) panels, wind turbines (WT) with a battery storage system (BSS), and backup diesel generators (DGs). The cost function for the optimization problem has been chosen to be the cost of energy (COE) and the loss of power supply probability of the HRE system. The main function of the optimization algorithms is to minimize this cost function. However, the optimal configuration cannot be accomplished without fulfilling the system reliability and operational constraints. Salp swarm algorithms (SSA), the grey wolf optimizer (GWO), and the improved grey wolf optimizer (IGWO) were employed as optimization techniques. To assess the efficacy of these optimization techniques, they were applied using MATLAB simulation. A comparison of their outcomes was conducted in order to determine which technique was the most effective. Furthermore, a statistical study was carried out to determine the performance stability of each optimization strategy. The results revealed the optimal variables, including the number of PVs, WTs, battery banks (BBs) and the capacity of DGs. Over the course of a year, the optimized configuration was put to the test against a study of its capital and fuel expenses. IGWO showed the best performance among the three techniques, while the statistical results prove the robustness of the SSA algorithm.

Feasibility and optimal sizing analysis of stand-alone hybrid energy systems coupled with various battery technologies: A case study of Pelee Island

Selection of the best component arrangement and sizing measurement for hybrid energy systems (HES) is vital to provide a reliable, consistent, and cost-effective energy supply. This study investigates a techno-economic feasibility analysis of stand-alone HES on Western side of Pelee Island, Canada, whose load is 2426 kWh/day. Several hybridization cases, including diesel (DG), wind (WT), and solar (PV) energy generation, coupled with converters (CNV) and four different battery-electric storage technologies, are explored for technical and economic suitability. The battery architectures involve Scenario I: 1 kWh Lead Acid (LA), Scenario II: 1 kWh Li-Ion, Scenario III: 100 kWh Li-Ion, and Scenario IV: 2.5 kWh PowerSafe (SBS). The results favored the Scenario II solution: 152 kW PV module, 200 kW DG, 190 kW CNV when integrated with 853 kWh Li-Ion battery which has the lowest NPC and LCOE by $3.67M and 0.321$/kWh, respectively. Fuel price and solar irradiance of LA-based systems are more sensitive to renewable fraction and less sensitive to LCOE.1 kWh Li-Ion battery-based hybrid options maintain their lowest LCOE and NPC over variation of fuel price, irradiance, and required load. Unmet load comparison reveals that PV/WT/DG/100 kWh Li-Ion and PV/WT/2.5 kWh SBS, respectively, are the most and least reliable hybrid cases. When comparing storage throughput, it is expected that 100 kWh Li-Ion batteries would be more efficient and have a longer service life than 2.5 kWh SBS batteries.

Factors affecting fisher decisions: The case of the inshore fishery for European sea bass (Dicentrarchus labrax).

Fishery management relies on forecasts of fish abundance over time and space, on scales of months and kilometres. While much research has focussed on the drivers of fish populations, there has been less investigation of the decisions made day-to-day by fishers and their subsequent impact on fishing pressure. Studies that focus on the fisher decisions of smaller vessels may be particularly important due to the prevalence of smaller vessels in many fisheries and their potential vulnerability to bad weather and economic change. Here we outline a methodology with which to identify the factors affecting fisher decisions and success as well as quantifying their effects. We analyse first the decision of when to leave port, and then the success of the fishing trip. Fisher behaviour is here analysed in terms of the decisions taken by fishers in response to bio-physical and socio-economic changes and to illustrate our method, we describe its application to the under 10-meter fleet targeting sea bass in the UK. We document the effects of wave height and show with increasing wave height fewer vessels left port to go fishing. The decision to leave port was only substantially affected by time of high tide at one of the four ports investigated. We measured the success of fishing trips by the landings of sea bass (kg) per metre of vessel length. Fishing success was lower when wave height was greater and when fish price had increased relative to the previous trip. Fuel price was unimportant, but a large proportion of the variation in success was explained by variation between individual vessels, presumably due to variation in skipper ability or technical restrictions due to vessel characteristics. The results are discussed in the context of management of sea bass and other small-scale inshore fisheries.

Characterization of Load Centers for Electric Vehicles Based on Simulation of Urban Vehicular Traffic Using Geo-Referenced Environments

The current desire for people to reduce the environmental impact of their current lifestyle, as well as the variation in the prices of fossil fuels, has materialized in a rising trend for electric vehicles (EV). These vehicles are increasingly making inroads in the automotive market and positively contributing to reducing environmental pollution by greenhouse gas emissions; therefore, they improve energy efficiency. For the success of this innovation, it is necessary to correctly identify the effective places where the charging centers for electric vehicles (CCEV) will be placed, which will contribute significantly to its development, allowing us to guarantee the autonomy of electric vehicles with a charging supply. Thus, the present work proposes a vehicle traffic simulation process using the “SUMO” simulator interface. The study’s objective is to locate sites for electric vehicle charging centers or stations, taking as the primary variable the vehicular traffic that has a strong relationship with this type of research. Consequently, the study evaluates the existing resources in geo-referenced scenarios and has analyzed the vehicular flow considering the distances of the routes. As follows, the simulation becomes a tool to recommend the location and quantity of CCEV, guaranteeing users a nearby place where they can charge their vehicle and thus achieve adequate autonomy.

Enhancement of Fermentable Sugars Obtained from<i> Amorphophallus</i> Spp. Tuber for Bioethanol Production by Optimizing Temperature and Pretreatment Concentration

Biofuels have been regaining popularity due to the increasing price of non-renewable fuels and the higher carbon dioxide emissions. Biofuels are manufactured from plant products and are mainly composed of lignocellulose and starch materials. This investigation aims to produce increased fermentable sugars for enhanced bioethanol production from tubers procured from northern Thailand. Varying concentrations of H2SO4 is used to pretreat the tubers. Before hydrolyzing with cellulase enzymes, the tubers were chopped into small pieces (1-2 cm), dried in a solar oven, powdered. The obtained results confirmed that the fermentable/ reducing sugar content of Amorphophallus spp. (suweg) tuber increased from 2.6 g/L to 19.01 g/L after enzymatic hydrolysis. The enzymes act as an excellent way to speed up the hydrolysis process. The theoretical potential of bioethanol production was calculated under ideal conditions, with the highest bioethanol concentration obtained is 9.69 ± 0.12 g/L at 0.4 % H2SO4 (pretreatment conc.) and 75 °C. The enhanced fermentable sugars obtained from starchy tubers may be utilized for bioethanol production to overcome depleting fossil fuels.

End Fuel Prices and Their Drivers in the Czech Republic

This paper deals with understanding drivers influencing the end price of fuels in the Czech Republic and ramifications for relevant companies. Its aim is to provide a comprehensive understanding of all relevant elements that have been influencing end prices of gasoline and diesel during last 8 years, understand their leverage and uncover which of those were the most important for this development. These are then researched using mainly graphical analysis and statistical tools. The delivery is that both prices of gasoline and diesel are highly correlated with the price development of crude oil and the prices of their respective commoditized barges expressed in the nominal value of CZK. It was also discovered that there are visible tendencies for asymmetrical pricing reaction and reaction lags, which could serve as a basis for a follow-up work. We also tried to examine the level in which Czech crown as a national currency provides cushion against up and down swings in commodity markets. Based on these findings several conclusive recommendations for relevant companies were built and delivered.

The distributional implications of the impact of fuel price increases on inflation

This paper investigates the response of consumer price inflation to changes in domestic fuel prices, looking at the different categories of the overall consumer price index (CPI). We then combine household survey data with the CPI components to construct a CPI index for the poorest and richest income quintiles with the view to assess the distributional impact of the pass-through. To undertake this analysis, the paper provides an update to the Global Monthly Retail Fuel Price Database, expanding the product coverage to premium and regular fuels, the time dimension to December 2020, and the sample to 190 countries. Three key findings stand out. First, the response of inflation to gasoline price shocks is smaller, but more persistent and broad-based in developing economies than in advanced economies. Second, we show that past studies using crude oil prices instead of retail fuel prices to estimate the pass-through to inflation significantly underestimate it. Third, while the purchasing power of all households declines as fuel prices increase, the distributional impact is progressive. But the progressivity phases out within 6 months after the shock in advanced economies, whereas it persists beyond a year in developing countries.

Performance analysis of a solar dryer integrated with thermal energy storage using PCM-Al2O3 nanofluids.

Solar energy will assist in lowering the price of fossil fuels. The current research is based on a study of a solar dryer with thermal storage that uses water and waste engine oil as the working medium at flow rates of 0.035, 0.045, and 0.065l/s. A parabolic trough collector was used to collect heat, which was then stored in a thermal energy storage device. The system consisted of rectangular boxes containing stearic acid phase change materials with 0.3vol % Al2O3 nanofluids, which stored heat for the waste engine oil medium is 0.33 times that of the water medium at a rate of flow of 0.035l/s which was also higher than the flow rates of 0.045 and 0.065l/s. The parabolic trough reflected solar radiation to the receiver, and the heat was collected in the storage medium before being forced into circulation and transferred to the solar dryer. At a flow rate of 0.035l/s, the energy output of the solar dryer's waste engine oil medium and water was determined to be roughly 12.4, 14, and 15.1, and 9.8, 10.5, and 11.5 times lower than the crops output of groundnut, ginger, and turmeric, respectively. The energy output in the storage tank and the drying of groundnut, ginger, and turmeric crops with water and waste engine oil medium at varied flow rates of 0.035, 0.045, and 0.065l/s were studied. Finally, depending on the findings of the tests, this research could be useful in agriculture, notably in the drying of vegetables.

Background, reality and prospects for LNG

The article discusses the main aspects of using LNG as a motor fuel for Russian heavy trucks. Collected and analyzed data of prices for various motor fuels over the past ten years. Two methods are proposed for calculating the projected retail price of LNG at the Cryo-filling station. The forecast values of the cost of motor fuels by 2030 have been obtained. An assessment of the environmental effect from the use of LNG as a motor fuel, adjusted for possible methane leaks into the atmosphere, is presented. Keywords liquefied methane, heavy trucks, the cost of LNG, ecology transport, methane leaks

Сравнительный анализ энергетических показателей судовой электростанции на базе классических дизель-генераторных установок и электростанции с дизель-генераторной установкой переменной частоты вращения

The article highlights an important scientific and technical problem: increasing the operation efficiency of the diesel generator power plants. One of the possible solutions of the problem is developing the diesel generators that operate in a variable speed mode with shared loads on the power plant. Introducing such diesel power plants into practice in recent decades has become possible due to the necessary converting semiconductor equipment, as well as a significant increase in prices for hydrocarbon fuels and objectively formulated requirements to improve the environmental performance of technical complexes. There is presented a comparative analysis of the energy efficiency of two power plants: with classic diesel generators and with a variable speed diesel generator. It has been proposed to compare the energy efficiency of the power plants by calculating the specific and absolute fuel consumption. The method of determining parameters of fuel consumption is considered. The method is based on using a multi-parameter characteristic of a diesel engine and the values of the efficiency ratios of the elements of the power equipment of plants. The results of calculating the specific fuel consumption of the power plants when changing the load power subject to the operating mode of the generators are presented. The results confirm the energy efficiency of the power plant with a variable speed diesel generator. Efficiency is increased due to saving the hydrocarbon fuels. The maximal savings correspond to the power plant operation under the load 20% less than the nominal.

Integration of Solar Process Heat in Industries: A Review

Industrial manufacturing approaches are associated with processing materials that consume a significant amount of thermal energy, termed as industrial process heat. Industrial sectors consume a substantial amount of energy for process heating over a wide range of temperatures (up to 400 °C) from agriculture, HVAC to power plants. However, the intensive industrial application of fossil fuels causes unfavorable environmental effects that cannot be ignored. To address this issue, green energy sources have manifested their potential as economical and pollution-free energy sources. Nevertheless, the adoption of solar industrial process heating systems is still limited due to a lack of knowledge in the design/installation aspects, reluctance to experience the technical/infrastructural changes, low price of fossil fuels, and lack of relative incentives. For successful solar process heat integration in industries, a proper understanding of the associated design factors is essential. This paper comprehensively reviews the integration strategies of solar industrial process heating systems, appraisal of the integration points, different aspects of solar collectors, installed thermal power, and thermal storage volume covering case studies, reports and reviews. The integration aspects of solar process heat, findings, and obstacles of several projects from the literature are also highlighted. Finally, the integration locations of SHIP systems are compared for different industrial sectors to find out the most used integration point for a certain sector and operation. It was found that for the food, beverage, and agriculture sector, 51% of solar process heat integration occurs at the supply level and 27.3% at the process-level.

Production and Economic Assessment of Synthetic Fuels in Agriculture—A Case Study from Northern Germany

A climate-friendly and CO2-neutral energy supply for agricultural farms is the subject of investigation of this study. The supply concerns the internal economy (buildings and animal husbandry) as well as the production of synthetic fuels for outdoor work (cultivation of the fields). This energy is in demand with many customers, e.g., the dairy cooperative Arla Foods, whose goal is the production of cow’s milk with net-zero CO2 emissions by the year 2050. The operational energy system considered here included renewable electricity generation, covering electricity consumption in the cowshed, battery storage for times without electricity generation, the production of synthetic fuels and feeding into the public power grid. Fluctuations depending on the day and the season were taken into account for electricity at 15-min intervals and for fuel per calendar week for one year. The aim was to determine the necessary capacities of renewable energy (RE) generation systems and production systems for synthetic fuel, as well as an economic evaluation with the calculation of the energy costs per kWh and the break-evens for the capital expenses (CapEx). Two different scenarios were developed using the example of a survey dairy farm with an annual electricity consumption of approximately 80,000 kWh in the cowshed and an annual diesel consumption of 35,000 L, corresponding to 350,000 kWh for field work. To ensure the energy supply, Scenario 1 required a photovoltaic system (PV) on the roof with an output of 125 kWp, a 250 kW small wind turbine, a battery with a storage capacity of 2 kWh and synthetic fuel production with an output of 210 kW. Scenario 2 required a 200 kWp PV system on the roof and a 520 kWp PV system in the open fields, a battery with a 105 kWh storage capacity and a synthetic fuel production facility with an output of 385 kW to cover the farm’s energy needs. The results showed that a farm’s own electricity production is currently profitable; however, a farm’s production of synthetic fuel still has comparatively high costs and therefore is not yet profitable. Further technical advances, rising prices of fossil fuels and economies of scale, e.g., larger cooperatively-operated plants, could help new technology to make a breakthrough.