Low enthalpy heat recovery potential from coal mine discharges in the South Wales Coalfield

Farr, Gareth; Sadasivam, Sivachidambaram; Manju, .; Watson, Ian; Thomas, Hywel Rhys; Tucker, D.G.

doi:10.1016/j.coal.2016.05.008

Cited by 46 publications

(35 citation statements)

References 16 publications

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“…Moreover, the uranium, molybdenum, tin, silver or flooded quarry were all listed as an energy source. In the more recent work from 2016, [13] enumerates 28 such systems, of which 57% are coal mines. Significant theoretical and academic studies were carried out to estimate the thermal potential of mine water in flooded coal mines [14][15][16][17].…”

Section: Mine Waters As a Source Of Energymentioning

confidence: 99%

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Possibilities for using mine waters in the context of the construction of heat energy clusters in Poland

Woźniak

Pactwa

2019

Energ Sustain Soc

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Background: Non-renewable energy continues to remain the main link in energy production in Poland. At the end of 2016, fossil fuels (hard coal and lignite) accounted for around 82% of gross domestic energy production. Reducing the share of fossil fuels in renewable energy sources in the overall energy mix is a long-term process. An example of solutions for the use of renewable energy sources as one of the key elements of sustainable development, ensuring rational, economical, ecological and social effects is the application of heat from mine waters for the production of thermal energy. The work estimates the current national energy balance in the country and describes the role of fossil fuels in the context of the issue of low emissions. Political transformation and accession to the European Union (EU) have contributed to greater care for natural environment. Poland, while being obliged to comply with the European guidelines, monitors the state of atmospheric air pollution and takes measures to improve its condition. Research issues presented in the article are addressed in the socio-environmental context. Methods: The method of reviewing scientific articles on the subject was used in the course of research task implementation (leading to the creation of a sustainable energy node or the idea of use of mine water). In addition, an analysis was carried out of the existing energy clusters in order to catch up with the standards of the European Union. Results: The analysis of world and national literature shows potential of using energy from the mining waters of active and closed mining plants. The authors propose the introduction of a precise term regarding mining potential as a thermal energy cluster. The opportunity to change the image of mines as polluters consists in using their potential beyond their main activity profile. Furthermore, the use of the hidden potential of mines signifies prolonging the life of an enterprise and thus, as its consequence, sustaining jobs and developing the region. Conclusions: The analyses presented in the article indicate the possibility of thermal energy production from mine waters not as an alternative but as an addition to the existing solutions, especially for the local needs.

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Section: Mine Waters As a Source Of Energymentioning

confidence: 99%

“…Flooded coal mines in the UK are a potential source of energy (with low temperature) due to their availability throughout the UK. Water from the flooded coal mines is ideal for use for heating, which can greatly help in achieving the goal of acquiring 12% RES for the country (for 2016, it was about 1%) [13].…”

Section: Mine Waters As a Source Of Energymentioning

confidence: 99%

Possibilities for using mine waters in the context of the construction of heat energy clusters in Poland

Woźniak

Pactwa

2019

Energ Sustain Soc

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“…In the UK, however, the few operational mine water heat pump schemes are either at a pilot stage or at a very modest scale (not exceeding several tens of kW thermal output): Shettleston, Glasgow, and Lumphinnans, Fife (Banks et al 2009), Dawdon, County Durham (Watson 2012;Bailey et al 2013), Caphouse mining museum, near Wakefield (Athresh et al 2016;Burnside et al 2016a;Banks et al 2017) Markham, near Bolsover (Athresh et al 2015;Burnside et al 2016b;Banks et al 2017), and Cefn Coed, Crynant, South Wales (Farr et al 2016). …”

Section: Introductionmentioning

confidence: 99%

A combined pumping test and heat extraction/recirculation trial in an abandoned haematite ore mine shaft, Egremont, Cumbria, UK

Banks

Steven²,

Berry

et al. 2017

Sustain. Water Resour. Manag.

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A pumping test at rates of up to 50 L s -1 was carried out in the 256 m-deep Florence Shaft of the Beckermet-Winscales-Florence haematite ore mine in Cumbria, UK, between 8th January and 25th March 2015. Drawdowns in mine water level did not exceed 4 m and the entire interconnected mine complex behaved as a single reservoir. Pumping did, however, induce drawdowns of around 1 m in the St. Bees Sandstone aquifer overlying the Carboniferous Limestone host rock. During a second phase of the pumping test, a proportion of the 11.3-12°C mine water was directed through a heat pump, which extracted up to 103 kW heat from the water and recirculated it back to the top of the shaft. Provided that an issue with elevated arsenic concentrations (20-30 lg L -1 ) can be resolved, the Florence mine could provide not only a valuable resource of high-quality water for industrial or even potable uses, it could also provide several hundred to several thousand kW of ground sourced heating and/or cooling, if a suitable demand can be identified. The ultimate constraint would be potential hydraulic impacts on the overlying St Bees Sandstone aquifer. The practice of recirculating thermally spent water in the Florence Shaft produced only a rather modest additional thermal benefit.

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“…Interest in the renewable heat energy potential of UK mine workings has seen a recent resurgence (e.g. Bailey et al 2016;Farr et al 2016). Feasibility studies of the potential of abandoned coal mine workings have been funded in Scotland (Harnmeijer et al 2012) and Wales (Department for Business Energy & Industrial Strategy 2018) and pilot schemes have been installed at two former collieries in England (Banks et al 2019).…”

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confidence: 99%

Coupled hydraulic and mechanical model of surface uplift due to mine water rebound: implications for mine water heating and cooling schemes

Todd

McDermott

Harris

et al. 2019

SJG

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In order to establish sustainable heat loading (heat removal and storage) in abandoned flooded mine workings it is important to understand the geomechanical impact of the cyclical heat loading caused by fluid injection and extraction. This is particularly important where significantly more thermal loading is planned than naturally occurs. A simple calculation shows that the sustainable geothermal heat flux from abandoned coal mines can provide less than a tenth of Scotland's annual domestic heating demand. Any heat removal greater than the natural heat flux will lead to heat mining unless heat storage options are also considered.As a first step, a steady-state, fully saturated, 2D coupled hydromechanical model of a generalized section of pillar-and-stall workings has been created. Mine water rebound was modelled by increasing the hydrostatic pressure sequentially, in line with monitored mine water-level data from Midlothian, Scotland. The modelled uplift to water-level rise ratio of 1.4 mm m −1 is of the same order of magnitude (1 mm m −1 ) as that observed through interferometric synthetic aperture radar (InSAR) data in the coalfield due to mine water rebound. The modelled magnitude of shear stress at the pillar corners, as a result of horizontal and vertical displacement, is shown to increase linearly with water level. Mine heat systems are expected to cause smaller changes in pressure than those modelled but the results provide initial implications on the potential geomechanical impacts of mine water heat schemes which abstract or inject water and heat into pillar-and-stall coal mine workings.

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Low enthalpy heat recovery potential from coal mine discharges in the South Wales Coalfield

Cited by 46 publications

References 16 publications

Possibilities for using mine waters in the context of the construction of heat energy clusters in Poland

Possibilities for using mine waters in the context of the construction of heat energy clusters in Poland

A combined pumping test and heat extraction/recirculation trial in an abandoned haematite ore mine shaft, Egremont, Cumbria, UK

Coupled hydraulic and mechanical model of surface uplift due to mine water rebound: implications for mine water heating and cooling schemes

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