Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.5
3.2
Journals
Energies
Special Issues
Shallow Geothermal Energy 2022
energies-logo
Submit to Energies Review for Energies Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Shallow Geothermal Energy 2022

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H: Geo-Energy".

Deadline for manuscript submissions: closed (30 August 2022) | Viewed by 3285

Special Issue Editors

Prof. Dr. Javier F. Urchueguía

E-Mail Website
Guest Editor
School of Industrial Engineering, Polytechnic University of Valencia, Camino de Vera s/n, 46022 Valencia, Spain
Interests: renewable heating and cooling; heat pumps; shallow geothermal energy; green house gas emission quantification systems; governance tools for GHG reduction
Special Issues, Collections and Topics in MDPI journals
Dr. Borja Badenes

E-Mail Website
Guest Editor
Information and Communication Technologies versus Climate Change (ICTvsCC) ,Institute of Information Technologies and Communications(ITACA), Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 Valencia, Spain
Interests: geothermal energy; shallow geothermal energy; ground source heat pumps; thermal response test (TRT); energy efficiency; nZEB building; energy modeling; thermal modeling; hydrothermal modeling; geothermal heat pumps; cost-saving; geothermal drilling; thermal efficiency; thermal storage; thermal energy; borehole thermal store; phase change materials (PCM)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Guest Editor is delighted to invite you to submit contributions to a Special Issue of Energies on the subject area of “Shallow Geothermal Energy 2022”. Shallow geothermal technology, often termed ground source heat pumps (GSHP), is a renewable heating and cooling technology that offers a one-in-all approach to the urgent necessity of systems that are at the same time efficient, renewable, and highly integrable with other RES as well as within the existing electricity grid. In recent years, much research has been focused on critical areas to improve the cost, efficiency, and social acceptance of these systems, still finding serious barriers that hinder a more generalized adoption by different stakeholders. This Special Issue, thus, includes but is not necessarily limited to the following list of topics: 

  • Open and hybrid systems and integration with other renewable energy sources;
  • Integration in the built environment;
  • Advances in design of systems;
  • Thermal response testing;
  • Improvement in materials;
  • Advances in drilling and installation methods;
  • Mapping of resources;
  • Social acceptance;
  • Lifecycle cost analysis and other analytic methods.

I am looking forward to receiving your excellent work.

Prof. Dr. Javier F. Urchueguía
Dr. Borja Badenes
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • shallow geothermal energy
  • ground source heat pumps
  • thermal response testing
  • hybrid system
  • building integration
  • drilling
  • design software
  • analytic or numeric heat transfer analysis
  • life cycle analysis
  • exergy analysis
  • geothermal resource mapping
  • open loop systems
  • closed loop systems
  • social acceptance
  • material for pipes
  • grouting
  • phase change materials

Published Papers (2 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

13 pages, 1544 KiB  
Article
Thermal and Mechanical Improvement of Filling Mixture for Shallow Geothermal Systems by Recycling of Carbon Fiber Waste
by Giovanni Floridia, Salvatore Urso, Giuseppe Maria Belfiore and Marco Viccaro
Energies 2022, 15(16), 5806; https://0-doi-org.brum.beds.ac.uk/10.3390/en15165806 - 10 Aug 2022
Viewed by 1132
Abstract
The reuse of waste materials such as carbon fiber (CF) as filling additive for closed-loop vertical geothermal probes in shallow geothermal systems has been evaluated as a new grout mixture for the improvement of geothermal energy systems efficiency and a sustainable supply of [...] Read more.
The reuse of waste materials such as carbon fiber (CF) as filling additive for closed-loop vertical geothermal probes in shallow geothermal systems has been evaluated as a new grout mixture for the improvement of geothermal energy systems efficiency and a sustainable supply of raw materials from special waste. The study evaluates the improvement in both thermal exchange characteristics and mechanical properties of the filling grout for geothermal purposes through the addition of 5% of CF to standard (ST) materials currently on the market. Uniaxial and flexural tests investigating the material response after 14 and 28 days from sample preparation on samples of both standard and mixed grout material as well as non-stationary hot wire method were used to define the thermal conductivity for both the standard and innovative mixtures. The experimental analysis provides evidence for increasing the thermal conductivity by about 3.5% with respect to standard materials. Even the mechanical properties are better in the innovative mixture, being the compressive strength 187% higher and flexural strength 81% higher than standard materials. The obtained results become useful for the optimization of low enthalpy geothermal systems and mostly for the design of the vertical heat exchange system in terms of depth/number of installed probes. Principally, thermal conductivity improvements result in a reduction of about 24% of the geothermal exchanger’s length, affecting the economic advantages in the implementation of the entire system. A simple analysis of the reuse of CF waste shows the reduction of industrial waste and the simultaneous elimination of disposal costs, defining new perspectives for industrial waste management. This research provides essential elements for the development of a circular economy and is well integrated with the European challenges about the End of Waste process and reduction of environmental impact, suggesting new perspectives for economic development and sectorial work. Full article
(This article belongs to the Special Issue Shallow Geothermal Energy 2022)
►▼ Show Figures

Figure 1

19 pages, 10319 KiB  
Article
Estimating the Subsurface Thermal Conductivity and Its Uncertainty for Shallow Geothermal Energy Use—A Workflow and Geoportal Based on Publicly Available Data
by Elisa Heim, Marius Laska, Ralf Becker and Norbert Klitzsch
Energies 2022, 15(10), 3687; https://0-doi-org.brum.beds.ac.uk/10.3390/en15103687 - 18 May 2022
Cited by 1 | Viewed by 1595
Abstract
Ground-source heat pumps with borehole heat exchangers (BHE) are an efficient and sustainable option to heat and cool buildings. The design and performance of BHEs strongly depend on the thermal conductivity of the subsurface. Thus, the first step in BHE planning is often [...] Read more.
Ground-source heat pumps with borehole heat exchangers (BHE) are an efficient and sustainable option to heat and cool buildings. The design and performance of BHEs strongly depend on the thermal conductivity of the subsurface. Thus, the first step in BHE planning is often assisted by a map representing the thermal conductivity of a region created from existing data. Such estimates have high uncertainty, which is rarely quantified. In addition, different methods for estimating thermal conductivity are used, for example, by the German federal states, resulting in incomparable estimates. To enable a consistent thermal conductivity estimation across state or country borders, we present a workflow for automatically estimating the thermal conductivity and its uncertainty up to user-defined BHE lengths. Two methods, which assess the thermal conductivity on different scales, are developed. Both methods are (1) based on subsurface data types which are publicly available as open-web services, and (2) account for thermal conductivity uncertainty by estimating its lowest, mean, and maximum values. The first method uses raster data, e.g., of surface geology and depth to groundwater table, and provides a large-scale estimate of the thermal conductivity, with high uncertainty. The second method improves the estimation for a small, user-defined target area by calculating the thermal conductivity based on the available borehole data in that area. The presented approach’s novelty is a web-based geodata infrastructure that seamlessly connects data provision and calculation processes, with a geoportal as its central user interface. To demonstrate the approach, we use data from the federal state of Hamburg and compare the results of two target areas with the thermal conductivity estimation by the Geological Survey of Hamburg. Depending on the selected region, differences between the two estimates can be considerable (up to 1.2 W m−1 K−1). The differences are primarily due to the selection of the thermal property database and the consideration of wet and dry rock. The results emphasize the importance of considering and communicating uncertainty in geothermal potential estimates. Full article
(This article belongs to the Special Issue Shallow Geothermal Energy 2022)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-2
Back to TopTop