scholarly journals Closed-Loop Systems for Geothermal Energy Exploitation from Hydrocarbon Wells: An Italian Case Study

2021 ◽  
Vol 11 (22) ◽  
pp. 10551
Author(s):  
Martina Gizzi
Keyword(s):  
Geothermal Energy ◽  
Food Industry ◽  
Closed Loop ◽  
Type Systems ◽  
Energy Resources ◽  
Working Fluid ◽  
Closed Loop Systems ◽  
Italian Case ◽  
Systems Models

Geothermal energy resources associated with disused hydrocarbon wells in Italian oilfields represent a considerable source of renewable energy. Using the information available on Italian hydrocarbon wells and on-field temperatures, two simplified closed-loop-type systems models were implemented in the Python environment and applied to a selected hydrocarbon well (Trecate4) located inside the Italian Villafortuna–Trecate field (Northwestern Italy). Considering the maximum extracted working fluid temperatures, Coaxial WBHE turned out to be a better performing technology than the U-tube version. The obtained outflow temperatures of the working fluid at the wellhead for Coaxial and U-tube WBHEs of 98.6 °C and 84 °C, respectively, are both potentially exploitable for ensuring a multi-variant and comprehensive use of the resource through its application in sectors such as the food industry, horticultural and flower fields.

An Improved Closed-Loop Heat Extraction Method From Geothermal Resources

2013 ◽  
Vol 135 (4) ◽  
Author(s):  
Arash Dahi Taleghani
Keyword(s):  
Contact Area ◽  
Geothermal Energy ◽  
Closed Loop ◽  
Produced Water ◽  
Heat Extraction ◽  
Working Fluid ◽  
Induced Earthquakes ◽  
Geothermal Resources ◽  
Major Mechanism ◽  
Pressure Changes

Disposal of produced water and induced earthquakes are two major issues that have endangered development of the geothermal energy as a renewable source of energy. To avoid these problems, circulation of a low-boiling working fluid in a closed loop has been proposed; however; since the major mechanism in this method for heat extraction is conduction rather than convection and additionally the heat conduction is limited to the wellbore surface. To overcome this shortcoming, the formation can be fractured with high conductivity material (for instance, silicon carbide ceramic proppants or cements with silane and silica fume as admixtures) to artificially increase the contact area between the “working fluid” and the reservoir. Our calculations show that fracturing increases the contact area by thousand times, additionally, the fracturing materials reinforce and stressed the formation, which reduce the risk of seismic activity due to temperature or pressure changes of the system during the production.

Material Demand Reduction and Closed-Loop Recycling Automotive Aluminium

MRS Advances ◽  
2018 ◽  
Vol 3 (25) ◽  
pp. 1393-1398 ◽  
Author(s):  
Philippa Horton ◽  
Julian Allwood ◽  
Paul Cassell ◽  
Christopher Edwards ◽  
Adrian Tautscher
Keyword(s):  
Production Process ◽  
Closed Loop ◽  
Aluminum Production ◽  
Efficient Production ◽  
Closed Loop Systems ◽  
Demand Reduction ◽  
Recycled Content ◽  
Recycle Aluminum ◽  
Material Utilization

ABSTRACTEnvironmentally aware automotive manufacturers recycle aluminum production scrap in closed-loop systems to generate environmental and financial savings. Further savings could be gained if material demand is reduced, through improving the material utilization of the production process. Since a more efficient production process generates less scrap, the opportunity for closed loop recycling reduces when material demand reduces. This paper investigates the interaction between material demand reduction and closed loop recycling for an aluminum intensive case-study vehicle. It identifies the greatest environmental and financial savings when both strategies are implemented together. It is shown that a ‘recycled content’ target does not capture these saving opportunities. It is recommended that automotive manufacturers set targets for both material utilization and scrap recovery, to simultaneously promote closed-loop recycling and material demand reduction.

scholarly journals Utilising Unused Energy Resources for Sustainable Heating and Cooling System in Buildings: A Case Study of Geothermal Energy and Water Sources in a University

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1836 ◽  
Author(s):  
Kwon Park ◽  
Seiyong Kim
Keyword(s):  
Geothermal Energy ◽  
Nuclear Power ◽  
Energy Savings ◽  
High Efficiency ◽  
Cooling System ◽  
Hot Water ◽  
Energy Resources ◽  
Heating And Cooling ◽  
Actual Use

Recently, Korea has become increasingly interested in unused, but possibly useful energy resources, due to the world-wide controversy over nuclear power and limitations in renewable energy production. Among these unused resources, the water that is produced in our surroundings is available as a potential energy source for heating, cooling and domestic hot water. This water is relatively stable on the supply side, available as a high-efficiency source in all seasons, and is continuously replenished without polluting the environment. This paper analyses the energy savings generated based on the actual use of a sustainable heating and cooling system that operates using the water escaping from a nearby building. The results indicate the value of protecting the environment as well as reducing energy consumption and associated costs.

Low-enthalpy geothermal energy resources in the Central Andes of Argentina: A case study of the Pismanta system

2021 ◽  
Author(s):  
Rodolfo O. Christiansen ◽  
Franco Clavel ◽  
Marcelo Gonzalez ◽  
Héctor P.A. García ◽  
Diana A. Ortiz ◽  
...  
Keyword(s):  
Geothermal Energy ◽  
Central Andes ◽  
Energy Resources

scholarly journals An Integrated Approach to Risk and Impacts of Geo-Resources Exploration and Exploitation

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4178
Author(s):  
Maria Vittoria Gargiulo ◽  
Alexander Garcia ◽  
Andrea Paulillo ◽  
Ortensia Amoroso ◽  
Ernesto Salzano ◽  
...  
Keyword(s):  
Geothermal Energy ◽  
Energy Production ◽  
Energy Resource ◽  
Integrated Approach ◽  
Energy Resources ◽  
Risk Assessments ◽  
Critical Importance ◽  
Exploration And Exploitation ◽  
Support Decision Making

Geo-resources are widely exploited in our society, with huge benefits for both economy and communities. Nevertheless, with benefits come risks and impacts. Understanding how such risks and impacts are intrinsically borne in a given project is of critical importance for both industry and society. In particular, it is crucial to distinguish between the specific impacts related to exploiting a given energy resource and those shared with the exploitation of other energy resources. A variety of different approaches can be used to identify and assess such risks and impacts. In particular, Life Cycle Assessment (LCA) and risk assessments (RAs) are the most commonly adopted. Although both are widely used to support decision making in environmental management, they are rarely used in combination perhaps because they have been developed by largely different groups of specialists. By analyzing the structure and the ratio of the two tools, we have developed an approach for combining and harmonizing LCA and MRA; the resulting protocol envisages building MRA upon LCA both qualitatively and quantitatively. We demonstrate the approach in a case study using a virtual site (based on a real one) for geothermal energy production.

scholarly journals Reuse of Decommissioned Hydrocarbon Wells in Italian Oilfields by Means of a Closed-Loop Geothermal System

2021 ◽  
Vol 11 (5) ◽  
pp. 2411 ◽  
Author(s):  
Martina Gizzi ◽  
Glenda Taddia ◽  
Stefano Lo Russo
Keyword(s):  
Geothermal Energy ◽  
Closed Loop ◽  
Oil And Gas ◽  
Current Knowledge ◽  
Sedimentary Basins ◽  
Working Fluid ◽  
Geothermal System ◽  
Fluid Temperature ◽  
Medium Temperature ◽  
Geothermal Resources

Geological and geophysical exploration campaigns have ascertained the coexistence of low to medium-temperature geothermal energy resources in the deepest regions of Italian sedimentary basins. As such, energy production based on the exploitation of available geothermal resources associated with disused deep oil and gas wells in Italian oilfields could represent a considerable source of renewable energy. This study used information available on Italian hydrocarbon wells and on-field temperatures to apply a simplified closed-loop coaxial Wellbore Heat Exchanger (WBHE) model to three different hydrocarbon wells located in different Italian oilfields (Villafortuna-Trecate, Val d’Agri field, Gela fields). From this study, the authors have highlighted the differences in the quantity of potentially extracted thermal energy from different analysed wells. Considering the maximum extracted working fluid temperature of 100 °C and imagining a cascading exploitation mode of the heat accumulated, for Villafortuna 1 WBHE was it possible to hypothesise a multi-variant and comprehensive use of the resource. This could be done using existing infrastructure, available technologies, and current knowledge.

METHOD OF SYNTHESIS OF CLOSED-LOOP SYSTEMS OF ACTIVE SHIELDING MAGNETIC FIELD OF POWER TRANSMISSION LINES

2016 ◽  
Vol 2016 (4) ◽  
pp. 8-10 ◽  
Author(s):  
B.I. Kuznetsov ◽  
◽  
A.N. Turenko ◽  
T.B. Nikitina ◽  
A.V. Voloshko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transmission Lines ◽  
Closed Loop ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Closed Loop Systems ◽  
Active Shielding
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