scholarly journals Climate factors influencing effective use of geothermal resources in SE Poland: the Lublin trough

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Bartłomiej Ciapała ◽  
Jakub Jurasz ◽  
Mirosław Janowski ◽  
Beata Kępińska
Keyword(s):  
District Heating ◽  
Climate Factors ◽  
Ramp Rate ◽  
Geothermal Heat ◽  
Geothermal Resources ◽  
Se Poland ◽  
Heat Demand ◽  
Effective Use ◽  
Financial Issues ◽  
Main Factor

AbstractAlthough geothermal resources are practically independent of climate factors, those factors significantly condition the potential use of the Earth’s natural heat resources. Unlike all the other factors limiting or facilitating the use of geothermal heat (like receivers’ temperature expectation, financial issues or local regulations), climate factors remain immovable. Thus, climate remains the main factor influencing the effective use of geothermal resources. Volumes of sold energy, typical capacity factors and rapid changes in heat demand may all influence the financial and technological performance of an investment. In the current paper, climate factors are translated into heat demand based on historical data (meteorological and district heating logs) by means of a dedicated artificial neural network, and analysed in terms of possible constraints and facilitators that might affect the effective use of geothermal energy. The results of ANN simulation indicate that average and typical operation is expected without any turbulences, yet about 10% of operating hours may require additional technical measures, like peak source support, smart management and buffers in order to limit pumping ramp rate. With appropriate dimensioning and exploitation, capacity factors as high as 60% are available, proving the potential for financially and environmentally effective use of geothermal resources.

scholarly journals Correction to: Climate factors influencing effective use of geothermal resources in SE Poland: the Lublin trough

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Bartłomiej Ciapała ◽  
Jakub Jurasz ◽  
Mirosław Janowski ◽  
Beata Kępińska
Keyword(s):  
Climate Factors ◽  
Geothermal Resources ◽  
Se Poland ◽  
Factors Influencing ◽  
Effective Use

scholarly journals The Potential of Wind Power-Supported Geothermal District Heating Systems—Model Results for a Location in Warsaw (Poland)

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3706 ◽  
Author(s):  
Ciapała ◽  
Jurasz ◽  
Kies
Keyword(s):  
Energy Source ◽  
Heat Source ◽  
Wind Power ◽  
Thermal Energy ◽  
District Heating ◽  
Distribution Networks ◽  
Weather Data ◽  
Geothermal Heat ◽  
District Heating System ◽  
Heat Demand

Geothermal heat is considered a sustainable energy source with significant global potential. Together with heat distribution networks, it can provide clean thermal energy to individual and commercial consumers. However, peaks in heat demand can require additional peaking sources at times. In this paper, we investigated how wind turbines can act as a peak energy source for a geothermal district heating system. We studied a model consisting of a geothermal heat source, a heat storage and wind power generator using historical weather data of Warsaw (Poland) and showed that wind power could increase the renewable share to supply a considerable heat demand compared to a geothermal heat source alone. The results indicate that wind power can be a suitable complement for a geothermal heat source to provide energy for heating. It is shown that a theoretical geo-wind-thermal storage based district heating network supplying 1000 m2, which requires 100 W/m2 at an outdoor temperature of −20 °C should have the following parameters: 4.8 MWh of thermal energy storage capacity, 45 kW of geothermal capacity and 5 kW of wind capacity. Such a system would ensure minimal wind curtailment, high utilization of geothermal source and high reliability of supply.

The UK Geoenergy Observatory in Glasgow, Scotland: a New Facility for Mine Water Geothermal Research

2020 ◽  
Author(s):  
Alison Monaghan ◽  
Vanessa Starcher ◽  
Hugh Barron ◽  
Corinna Abesser ◽  
Brighid O Dochartaigh ◽  
...  
Keyword(s):  
Environmental Impacts ◽  
Mine Water ◽  
Geothermal Energy ◽  
Scientific Evidence ◽  
District Heating ◽  
Research Field ◽  
Geothermal Heat ◽  
British Geological Survey ◽  
Geothermal Resources ◽  
The Uk

<p>Mine water geothermal heat production and storage can provide a decarbonised source of energy for space heating and cooling, however the large resource potential has yet to be exploited widely. Besides economic, regulatory and licensing barriers, the geoscientific uncertainties remain significant. A lack of detailed understanding of thermal and hydrogeological subsurface conditions and processes, resource sustainability, and the potential impacts on the subsurface-to-surface environmental impacts have so far hampered a more widespread development of this resource.</p><p>The British Geological Survey (BGS) is in the final stages of constructing the Glasgow Geothermal Energy Research Field Site on behalf of the Natural Environment Research Council with UK Government funding. As one of the two new UK Geoenergy Observatories, the Glasgow site will facilitate collaborative research to improve our understanding of subsurface processes and change. It will provide scientific infrastructure for investigating the shallow, low-temperature coal mine water geothermal energy resources available in abandoned and flooded mine workings at depths of around 50-90 m below the eastern parts of the city.</p><p>The Glasgow site was chosen due to its commonalities with other parts of the UK and beyond in terms of its coal mining history, geology and legacy of industrial land use. Mine water geothermal resources in these settings could provide sufficient heat for community-scale district heating networks.</p><p>The research infrastructure comprises arrays of mine water and environmental baseline boreholes for characterisation and monitoring, and the boreholes are instrumented with permanent geophysical sensors. Here we report on interim results from drilling the environmental baseline and mine water boreholes, and opportunities for research and innovation.</p><p>Continuous monitoring and regular sampling data will be provided for the science community to examine a dynamic subsurface geo-, hydro- and bio-sphere. The facility will also provide opportunities for researchers to undertake their own experiments, with the aim of producing high-quality scientific evidence to reduce uncertainty on mine heat energy systems and understand their environmental impacts, for schemes across the UK and beyond.</p>

scholarly journals Geospatial Analysis of the Building Heat Demand and Distribution Losses in a District Heating Network

2016 ◽  
Vol 5 (12) ◽  
pp. 219 ◽  
Author(s):  
Tobias Törnros ◽  
Bernd Resch ◽  
Matthias Rupp ◽  
Hartmut Gündra
Keyword(s):  
District Heating ◽  
Geospatial Analysis ◽  
Heat Demand ◽  
Building Heat

scholarly journals Estimating the Geothermal Electricity Generation Potential of Sedimentary Basins Using genGEO (The Generalizable GEOthermal Techno-Economic Simulator)

2021 ◽  
Author(s):  
Benjamin Adams ◽  
Jonathan Ogland-Hand ◽  
Jeffrey M. Bielicki ◽  
Philipp Schädle ◽  
Martin Saar
Keyword(s):  
Electricity Generation ◽  
Power Plants ◽  
Sedimentary Basin ◽  
Sedimentary Basins ◽  
Heat Extraction ◽  
Subsurface Water ◽  
Geothermal Heat ◽  
Geothermal Resources ◽  
Geothermal Power ◽  
Economic Tools

<p><b>Abstract</b></p><p>Sedimentary basins are ubiquitous, naturally porous and permeable, and the geothermal heat in these basins can be extracted with geologic water or CO<sub>2</sub> and used to generate electricity. Despite this, the broad potential that these formations may have for electricity generation is unknown. Here we investigate this potential, which required the creation of the <u>gen</u>eralizable <u>GEO</u>thermal techno-economic simulator (genGEO). genGEO is built with only publicly available data and uses five standalone, but integrated, models that directly simulate all components of geothermal power plants to estimate electricity generation and cost. As a result of this structure, genGEO, or a portion of it, can be applied or extended to study any geothermal power technology. In contrast, the current techno-economic tools for geothermal power plants rely on characterizations of unpublished ASPEN results and are thus not generalizable enough to be applied to sedimentary basin geothermal power plants which use subsurface CO<sub>2</sub>.</p> <p>In this study, we present genGEO as open-source software, validate it with industry data, and compare its estimates to other geothermal techno-economic tools. We then apply genGEO to sedimentary basin geothermal resources and find that using CO<sub>2</sub> as a subsurface heat extraction fluid compared to water decreases the cost of geothermal electricity across most geologic conditions that are representative of sedimentary basins. Using genGEO results and p50 geologic data, we produce supply curves for sedimentary basin geothermal power plants in the U.S., which suggests that there is present-day potential to profitably increase the capacity of geothermal power by ~10% using water as the subsurface heat extraction fluid. More capacity is available at lower cost when CO<sub>2</sub> is used as the subsurface fluid, but realizing this capacity requires geologically storing between ~2 and ~7 MtCO<sub>2</sub>/MW<sub>e</sub>. But developing sedimentary basin resources in the short-term using subsurface water may not eliminate options for CO₂-based power plants in the long-term because the least-cost order of sedimentary basins is not the same for both CO<sub>2</sub> and water. With sufficient geologic CO<sub>2</sub> storage, developing sedimentary basins using CO<sub>2</sub>- and water-based power plants may be able to proceed in parallel.</p>

Thermodynamic Analysis of Minimum Extraction Ratio for Coal-Fired CHP Plants

2014 ◽  
Vol 472 ◽  
pp. 1052-1056
Author(s):  
Chun Hui Liao ◽  
Zhi Gang Zhou ◽  
Jia Ning Zhao
Keyword(s):  
Energy Efficiency ◽  
Thermodynamic Analysis ◽  
District Heating ◽  
Combined Heat And Power ◽  
Exergy Efficiency ◽  
Extraction Ratio ◽  
Dual Purpose ◽  
Heat Demand ◽  
Chp System ◽  
Minimum Heat

For evaluating the performance of combined heat and power district heating (CHP-DH) system, some thermodynamic indicators of CHP system, include energy efficiency, exergy efficiency, RPES and RAI, are introduced in this paper. Based on two condensed and heating dual purpose plants, the values of these indicators are calculated with different extraction ratio. The results show that RAI and RPES are more reasonable to be used to assess CHP-DH system and there is a minimum extraction ratio for each unit, which is 0.4 for given plants in this paper, to keep CHP-DH beneficial compared with separate heat and power (SHP) system. Besides, the minimum heat demand of CHP-DH system should be larger than the supplied heat correspond to minimum extraction ratio.

scholarly journals The GRETA project: the contribution of near-surface geothermal energy for the energetic self-sufficiency of Alpine regions

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Alessandro Casasso ◽  
Bruno Piga ◽  
Rajandrea Sethi ◽  
Joerg Prestor ◽  
Simona Pestotnik ◽  
...  
Keyword(s):  
Geothermal Energy ◽  
Primary Energy ◽  
Economic Activities ◽  
Geothermal Heat ◽  
Geothermal Resources ◽  
Near Surface ◽  
Alpine Regions ◽  
Heating And Cooling ◽  
Geothermal Heat Pump ◽  
Alpine Space

The Alpine regions are deeply involved in the challenge set by climate change, which is a threat for their environment and for important economic activities such as tourism. The heating and cooling of buildings account for a major share of the total primary energy consumption in Europe, and hence the energy policies should focus on this sector to achieve the greenhouse gas reduction targets set by international agreements. Geothermal heat pump is one of the least carbon-intensive technologies for the heating and cooling of buildings. It exploits the heat stored within the ground, a local renewable energy source which is widely available across the Alpine territory. Nevertheless, it has been little considered by European policies and cooperation projects. GRETA (near-surface Geothermal REsources in the Territory of the Alpine space) is a cooperation project funded by the EU INTERREG-Alpine Space program, aiming at demonstrating the potential of shallow geothermal energy and to foster its integration into energy planning instruments. It started in December 2015 and will last three years, involving 12 partners from Italy, France, Switzerland, Germany, Austria, and Slovenia. In this paper, the project is presented, along with the results of the first year of work.

Economic aspects of the use of deep geothermal heat in district heating in Poland

2015 ◽  
Vol 49 ◽  
pp. 29-40 ◽  
Author(s):  
Maciej Huculak ◽  
Wojciech Jarczewski ◽  
Magdalena Dej
Keyword(s):  
District Heating ◽  
Economic Aspects ◽  
Geothermal Heat

scholarly journals Tracking Australian Hajj Pilgrims’ Health Behavior before, during and after Hajj, and the Effective Use of Preventive Measures in Reducing Hajj-Related Illness: A Cohort Study

Pharmacy ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 78
Author(s):  
Amani Salem Alqahtani ◽  
Mohamed Tashani ◽  
Anita Elizabeth Heywood ◽  
Abdulrahman Bader S. Almohammed ◽  
Robert Booy ◽  
...  
Keyword(s):  
Cohort Study ◽  
Hand Hygiene ◽  
Preventive Measures ◽  
Plain Water ◽  
Travel Agents ◽  
Runny Nose ◽  
Preventative Measures ◽  
Effective Use ◽  
Main Factor

This study assessed Australian Hajj pilgrims’ knowledge, attitude and practices throughout their Hajj journey to understand their health behaviors, use of preventative measures and development of illness symptoms. A prospective cohort study with data collection at three phases (before, during and after Hajj) was conducted among Australian pilgrims between August and December 2015. Baseline data were collected from 421 pilgrims before Hajj, with 391 providing follow-up data during Hajj and 300 after their home return. Most participants (78% [329/421]) received one or more recommended vaccines; travel agents’ advice was the main factor affecting vaccination uptake. Most participants (69% [270/391]) practiced hand hygiene with soap and sanitizers frequently, followed by disposable handkerchief use (36% [139/391]) and washing hands with water only (28% [111/391]). During Hajj 74% (288/391) of participants reported one or more illness symptoms, 86% (248/288) of these symptoms were respiratory. Cough was less often reported among pilgrims who received vaccinations, cleaned their hands with soap or alcoholic hand rubs, while a runny nose was less common among those who frequently washed their hands with plain water but was more common among those who used facemasks. This study reveals that most Australian Hajj pilgrims complied with key preventative measures, and that tour group operators’ advice played an important role in compliance. Pilgrims who were vaccinated and practiced hand hygiene were less likely to report infection symptoms.

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