Design and testing of fish drier system utilizing geothermal energy resource in Ie Suum, Aceh Besar

2016 ◽  
Author(s):  
Amir Zaki Mubarak ◽  
M. Ilham Maulana ◽  
Ahmad Syuhada
Keyword(s):  
Geothermal Energy ◽  
Energy Resource ◽  
Design And Testing

Analytical solution for estimating the influence of a pre-existing ground water flow on a geothermal heat production-injection well system

2011 ◽  
Vol 2 (1) ◽  
pp. 13-17
Author(s):  
I. David ◽  
M. Visescu
Keyword(s):  
Ground Water ◽  
Water Flow ◽  
Geothermal Energy ◽  
Flow Direction ◽  
Energy Resource ◽  
Hot Water ◽  
Injection Well ◽  
Production Well ◽  
Ground Water Flow ◽  
The Earth

Abstract Geothermal energy source is the heat from the Earth, which ranges from the shallow ground (the upper 100 m of the Earth) to the hot water and hot rock which is a few thousand meters beneath the Earth's surface. In both cases the so-called open systems for geothermal energy resource exploitation consist of a groundwater production well to supply heat energy and an injection well to return the cooled water, from the heat pump after the thermal energy transfer, in the underground. In the paper an analytical method for a rapid estimation of the ground water flow direction effect on the coupled production well and injection well system will be proposed. The method will be illustrated with solutions and images for representative flow directions respect to the axis of the production/injection well system.

scholarly journals Using open software to teach resource assessment of solar thermal and geothermal energy

2017 ◽  
Author(s):  
Alain Ulazia ◽  
Aitor Urresti ◽  
Alvaro Campos ◽  
Gabriel Ibarra-Berastegi ◽  
Mirari Antxustegi ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Geothermal Energy ◽  
Basque Country ◽  
Real Life ◽  
Energy Resource ◽  
Resource Assessment ◽  
Solar Thermal ◽  
System Modelling ◽  
Geothermal Resources ◽  
Life Problems

The students of the Faculties of Engineering of the Universitty of Basque Country (Gipuzkoa-Eibar and Bilbao) in the last years of their studies, before becoming engineers, have the opportunity to select a block of subjects intended to enhance their knowledge on renewable energy systems. One of these subjects is Solar Thermal and Geothermal energy. These subjects are devoted to assessing the renewable energy resource, and designing optimal systems. Apart from the transmission of good practices, the focus is practical and is based on hands-on computer real-life exercises, which involves not only intensive programming using high-level software, but also the spatial representation of results. To that purpose two main open source codes are used: Octave (https://www.gnu.org/software/octave/), and QGIS (https://www.qgis.org/). Students learn how to address real-life problems regarding the geographical representation of solar radiation and low temperature geothermal resources using QGIS, and solar thermal system modelling using Octave.

scholarly journals GEOTHERMAL ENERGY OF THE REPUBLIC OF SRPSKA AND HYDROCHEMICAL ASPECTS OF ITS EXPLORATION AND EXPLOITATION

2018 ◽  
Vol 4 (7) ◽  
Author(s):  
Andrijana Stevanović ◽  
Boban Jolović
Keyword(s):  
Renewable Energy ◽  
Geothermal Energy ◽  
Renewable Energy Sources ◽  
Energy Resource ◽  
Geothermal Gradient ◽  
Heat Pumps ◽  
Electricity Production ◽  
Thermal Waters ◽  
The Republic ◽  
Banja Luka

One of the most used renewable energy sources worldwide is geothermal energy. Itrepresents the heat, originated by natural processes happen in the Earth interior. The hot springsphenomena are the most frequent natural manifestation of geothermal activity.Geothermal potentiality of some area can be estimated based on geothermal gradient. Geothermalgradient is a conductive terrestrial parameter that represents the degree of increasing of the Earthtemperature vs. depth. It is usually expressed in ⁰C/m or ⁰C/km. Different areas have differentthermal gradients and thus different geothermal potential. Generally, higher geothermal gradientscorrespond to areas containing more geothermal energy.Geothermal characteristics of the territory of the Republic of Srpska are closely related to itscomplex geological setting. It is the reason why geothermal characteristics are different from areato area. Higher geothermal potentiality is recognised in the northern parts of the entity, in the firstorder in Semberija, Posavina and Banja Luka regions.The use of geothermal energy with different fluid temperatures can be considered throughthe Lindaldiagram, who firstly proposed acomprehensive scale with appropriate temperatures for differentuses. High temperature fluids are mostly used for electricity production and moderate and lowtemperature fluids for the direct use.Despite the fact that the territory of the Republic of Srpska hasfavourable geothermal properties, utilization of this kind of renewable energy resource isinadequate. Especially indicative are data about the use of geothermal energy by heat pumps (inbad sense) in comparison with praxis of developed countries.Chemical composition of thermal waters plays very important role and can be used in itsexploration stage, for analyses of possibility of its use and for prediction of exploitation effects, aswell. This kind of renewable energyresource, highly ecologically recommended, must be consideredmore seriously in the future in the Republic of Srpska. Furthermore, it must be put into the energystrategic documentsin appropriate manner.

Heat flow in the Garibaldi volcanic belt, a possible Canadian geothermal energy resource area

1981 ◽  
Vol 18 (2) ◽  
pp. 366-375 ◽  
Author(s):  
J. F. Lewis ◽  
Alan M. Jessop
Keyword(s):  
Heat Flow ◽  
Geothermal Energy ◽  
Thermal Conduction ◽  
Energy Resource ◽  
Volcanic Belt ◽  
Geothermal Reservoir ◽  
Energy Potential ◽  
Geothermal Heat ◽  
Groundwater Movement ◽  
Uplift And Erosion

The geothermal heat flow has been determined in four boreholes drilled within the area of the Garibaldi volcanic belt of southwestern British Columbia, Canada. The program was designed to investigate a suspected geothermal reservoir and the surrounding area as part of a continuing program of the Canadian Federal Government to assess the geothermal energy potential in western Canada.The measurements, after application of corrections for sediment diffraction, topography, Pleistocene thermal history, and uplift and erosion, fall into two distinct catagories. Three of the measurements, at distances greater than 10 km from Mt. Meager, have a mean of 79 mW m−2 with a standard deviation of 10 mW m−2, and the single measurement near Mt. Meager indicates a heat flux of 132 mW m−2. All these measurements are suspect to a certain degree because of groundwater movement at and around the measurement sites. The three distant observations are similar to others in the Cordilleran thermal zone, whereas the result at Mt. Meager appears to be anomalous. This pattern suggests that near the Mt. Meager area heat is being transported by means other than simple thermal conduction, consistent with other studies that indicate the presence of a geothermal reservoir of unknown size.

scholarly journals Thermal Performance Analyses of Multiborehole Ground Heat Exchangers

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
Wanjing Luo ◽  
Changfu Tang ◽  
Yin Feng ◽  
Pu Miao
Keyword(s):  
Thermal Performance ◽  
Heat Exchangers ◽  
Geothermal Energy ◽  
Greenhouse Gas Emission ◽  
Energy Resource ◽  
Thermal Dissipation ◽  
Uniform Heat Flux ◽  
Fluid Temperature ◽  
Cooling Mode ◽  
Ground Heat Exchangers

Geothermal energy known as a clean, renewable energy resource is widely available and reliable. Ground heat exchangers (GHEs) can assist the development of geothermal energy by reducing the capital cost and greenhouse gas emission. In this paper, a novel semianalytical method was developed to study the thermal performance of multiborehole ground heat exchangers (GHEs) with arbitrary configurations. By assuming a uniform inlet fluid temperature (UIFT), instead of uniform heat flux (UHF), the effects of thermal interference and the thermal performance difference between different boreholes can be examined. Simulation results indicate that the monthly average outlet fluid temperatures of GHEs will increase gradually while the annual cooling load of the GHEs is greater than the annual heating load. Besides, two mechanisms, the thermal dissipation and the heat storage effect, will determine the heat transfer underground, which can be further divided into four stages. Moreover, some boreholes will be malfunctioned; that is, boreholes can absorb heat from ground when the GHEs are under the cooling mode. However, as indicated by further investigations, this malfunction can be avoided by increasing borehole spacing.

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