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Geothermal Energy - DOAJ

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Last Updated: 11 January 2023

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Deliverable Wellhead Temperature—A Feasibility Study of Converting Abandoned Oil/Gas Wells to Geothermal Energy Wells

In local geological conditions, it is highly recommended to investigate the possibility of turning abandoned oil/gas wells into geothermal energy production wells. This model simulates a hot transfer from the geothermal zone through the wellbore to the surface wellhead, considering pipe and wellbore insulation. The temperature of the returning fluid is much closer to that of the injected fluid without pipe insulation, according to reports. Pipe insulation can raise the temperature of the returning fluid by a significant degree. The deliverable fluid temperature can be increased from 30 °C to 124 °C in a system with a thermal conductivity of insulation pipe Kp = 0. 3 W/m-C. Increasing the length of the horizontal wellbore in the geothermal zone from 2000 m to 8000 m will raise the temperature of the returning fluid from 148 °C to 159 u00b0C.

Source link: https://doi.org/10.3390/su15010729


Fifth-Generation District Heating and Cooling Networks Based on Shallow Geothermal Energy: A review and Possible Solutions for Mediterranean Europe

This paper includes a comprehensive review of scientific findings, legislative frameworks, technological advancements, and industry trends pertaining to the integration of shallow geothermal energy technologies into modern 5th-generation district heating and cooling networks. In this sense, decarbonization of the heating and cooling industry is a key component in the energy transition puzzle, keeping global warming below the critical threshold of 1. 5 %u00b0C by the next century. Moreover, the Ukraine war has heightened urgency to bring an end to fossil fuel dependence. Since SGE's potential contribution to the decarbonization of the heating and cooling industry is largely untapped in Europe, this synergistic effect represents a potential improvement. In comparison to the majority of Europe, a special focus on Mediterranean countries is set, where SGE systems and DHC networks of any sort are particularly poor in deployment.

Source link: https://doi.org/10.3390/en16010147


The situation analysis of hot dry rock geothermal energy development in China-based on structural equation modeling

The 2030 and 2060 goals in China include lowering the use of fossil fuels and increasing the amount of renewable energy in primary energy. This paper quantitatively investigates the factors that influence dry hot rock formation and use, beginning with resources, climate, industry, and manufacturing technologies, as well as effective use of technology. Then questionnaire survey, which was based on these five elements, was developed and sent by email to geothermal energy specialists in universities and research institutions based on these five principles. The results show that climate, market, and development techniques have significant impacts on dry hot rocks, particularly in dry hot rocks, while resources and effective use of technology have negligible effects on dry hot rocks. Lastly, some measures to encourage the growth of dry hot rocks in China are suggested.

Source link: https://doi.org/10.1016/j.heliyon.2022.e12123


Trends and prospects of geothermal energy as an alternative source of power: A comprehensive review

The world has capitalized on numerous renewable energy sources by expanding its energy infrastructure mainly focused on solar, biomass, and hydrogen. However, geothermal energies have yet to be developed on a large scale, with reports from 62 wells in various regions of the world ranging from 20. 8 o/km to 48. 7 u00b0C/km. According to new reports, Bangladesh also has a significant potential for geothermal energy. This report also includes a case study, which also includes the possibility of geothermal energy for Bangladesh.

Source link: https://doi.org/10.1016/j.heliyon.2022.e11836


Forecasting Installation Capacity for the Top 10 Countries Utilizing Geothermal Energy by 2030

For energy decision-makers, geothermal energy installation is highly recommended, allowing them to quickly identify new capacity units, update existing energy policies and plans, expand future infrastructure, and satisfy consumer load requirements. Data from 2000 to 2021 were used for each country's geothermal energy installation capacity in order to create a model that can accurately predict the annual geothermal energy consumption capacity by 2030. The IGM model estimated the capacity of geothermal energy installations for the next nine years from a small dataset of 22 data points, with one point denoting one year.

Source link: https://doi.org/10.3390/thermo2040023


Estimating Geothermal Energy Resource Potential within Jema’a Local Government Area of Kaduna State, Nigeria

The geothermal energy resource potential in Jema State, N. . . . ia, was estimated using aeromagnetic data from Jemau2019a, sheet No. 188. The study area is sandwiched between latitude and N, as well as longitude and E. The gridded data generated a complete magnetic intensity map of the area. The Residual map was obtained by excluding the regional field from the TMI, which was divided into 36 blocks for spectral analysis. From the gradient of a high wave number portion of the power spectrum, the depth to the magnetic source was found to the top of the magnetic source. To obtain the depth to the bottom of the magnetic source, the values for depth were calculated using the values for depth to bottom of the magnetic source. Z_0 and Z_t were used to obtain the depth to bottom of the magnetic source. The geothermal gradient values were calculated by dividing by Z_B, but the heat flow values were obtained by multiplying dT/dZ by the constant k.

Source link: https://doi.org/10.47514/phyaccess.2022.2.1.011


A data-driven approach to low-enthalpy shallow geothermal energy extraction: A case study on indoor heating for precision agriculture applications

Shallow geothermal energy systems provide space heating and cooling with a high rate of success. An experimental phase was conducted to determine the effect of soil water content variations on the soil temperature in 0. 75 m, 1. 5 m, 2. 25 m, and 3. 0 m. Field testing was carried out using two probes, one exposed and the other covered with a polyethylene sheet to determine the effect soil moisture content variations exerted over the soil temperature. Enough heat extraction capacity was estimated by modeling a buried pipe system based on the temperature profile established. Based on actual operation data provided by the owners, the computed available heat flow was used to simulate the performance of a geothermal heat pumping system for greenhouse heating. The results show that shallower layers of the ground can provide optimal thermal requirements for immediate thermal requirements, while a 2. 5 m loop with the same width can meet 90% of the same demand, with a variation in availability ranging from 10% to 20%, depending on the severity of surface conditions. In addition, from the initial data review, it was found that controlling the agronomic values, which are related to indoor agriculture, improves the physical aspect of greenhouse energy management, opening the way to more flexible thermal solutions tailored to various operating conditions.

Source link: https://doi.org/10.1016/j.csite.2022.102578


Thermodynamic Performance of Geothermal Energy Cascade Utilization for Combined Heating and Power Based on Organic Rankine Cycle and Vapor Compression Cycle

When the combined heating and power system for energy cascade utilization came into being, a large population and rapid urbanization have both greatly increased heating demand. However, the study on condensing heat, the finding of the coupling law between power generation and heating supply, and the effect of heat source parameters on thermo-economic results are still inadequate. The increase of the volume flow will increase the power generation and heating supply quantity of the device, according to the test results, and an optimal evaporation temperature range of 130 – 140 °C is found to optimize the system's performance. Although there is a mutual exclusivity between the net power output of the system and the heating demand quantity, it should be appropriately allocated based on the actual needs of engineers in engineering applications.

Source link: https://doi.org/10.3390/en15197294


Review and investigations on geothermal energy extraction from abandoned petroleum wells

Abstract: Geothermal energy is a renewable and renewable energy source that can be used in electricity generation, space heating/cooling, and other industrial applications. All make the geothermal energy a major contributor to global energy production in an environmentally friendly manner. The expensive investment costs of geothermal wells are one of the main points of geothermal exploration's unethical sourcesu2019 exploration. It's a novel idea to use abandoned petroleum wells for geothermal extraction. Well temperature profiles can tell how much heat can be transferred and produced from the wells. A literature review has been done in this paper to investigate the current applications of geothermal energy extraction using abandoned petroleum wells. The case report by Then illustrates the importance of working fluids, wellbore architecture, and organizational parameters in geothermal energy production.

Source link: https://doi.org/10.1007/s13202-018-0535-3


The Use of Geothermal Energy to Heating Crops under Cover: A Case Study of Poland

The use of geothermal water in greenhouse gardening is the most modern method of farming; it allows the production cycle to be carried out year after decreasing energy costs, as well as lowering energy costs. The heat demand for modern greenhouse constructions was determined in this paper, which was based on simple heat transfer relationships. The estimated annual heat demand ranged from 11. 05 to 12. 46 TJ, depending on the type of unit of greenhouse area analysed. The analysis was determined based on information regarding the geothermal energy potential in Poland, so investment costs and payback times were determined for the analysed locations based on reports on the geothermal energy potential in Poland.

Source link: https://doi.org/10.3390/en14092618

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions