Simulating thermal pollution caused by a hypothetical groundwater heat pump system under different climate, operation and hydrogeological conditions

Gunawardhana, Luminda Niroshana; Kazama, So; Al-Rawas, Ghazi

doi:10.1186/s40517-015-0037-1

Cited by 6 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, although advances have been made in the development of models to establish the appropriate operational details (including reinjection rates and timings) in different site conditions to minimise the impact of shallow geothermal energy systems on subsurface temperatures (Vienken et al, 2019), this does not obviate the need for an assessment of the particular site conditions of shallow geothermal energy systems. In particular, account needs to be taken of any particular ecological sensitivities and the potential need for post installation monitoring (Gunawardhana et al, 2015). Careful consideration therefore needs to be given to where to strike the balance between regulatory control and minimising the bureaucratic burden on the industry and regulator.…”

Section: Recommendationsmentioning

confidence: 99%

The role of regulation in geothermal energy in the UK

McClean

Pedersen

2023

Energy Policy

View full text Add to dashboard Cite

Section: Recommendationsmentioning

confidence: 99%

The role of regulation in geothermal energy in the UK

McClean

Pedersen

2023

Energy Policy

View full text Add to dashboard Cite

“…This enables the calculation of parameter variations in a fraction of the time needed for numerical simulations. For this purpose, numerical models were calculated in OGS and a proxy model was trained from the results using the technique of Gaussian process regression (GPy, 2014;Stone, 2011). A detailed description of this method can be found, e.g.…”

Section: Sensitivity Analysismentioning

confidence: 99%

Global Sensitivity Analysis and Uncertainty Quantification for Design Parameters of Shallow Geothermal Systems

Richter,

Lubashevsky,

Randow

et al. 2023

Preprint

View full text Add to dashboard Cite

To improve the design process of geothermal systems, it is important to know which design parameters particularly affect the performance of the system. This article presents investigations on design parameters for borehole heat exchangers in the shallow subsurface. The study is based on numerical simulations with a double U-tube borehole heat exchanger and approximated models obtained using machine learning. As a result of the global sensitivity analysis, relevant parameters are identified and their respective influence on the performance of a borehole heat exchanger is compared. For example, according to this analysis, the three parameters with the highest sensitivity are: the initial temperature, the heat demand and the share of the borehole heat exchanger that is surrounded by groundwater flow. Finally, the effects of uncertainties in the parameters identified as relevant for the design of a borehole heat exchanger are considered in an uncertainty quantification for a fictitious site. Uncertainties for regulatory compliance with respect to temperature limits as well as a large probability of oversizing the system were identified for the considered example. The results of the exemplary uncertainty quantification indicate that it has the potential to be a useful tool for planning practice.

show abstract

“…This is also connected with the horizontal transport of thermal pollution, which may occur as more and more ground-and water-sourced installations are developed. Such a situation has been described by several authors [15][16][17]. Therefore, a proper simulation of thermal plumes is crucial for integrated special planning in the case of dense geothermal use in cities [18].…”

Section: Introductionmentioning

confidence: 96%

Upgrading a District Heating System by Means of the Integration of Modular Heat Pumps, Geothermal Waters, and PVs for Resilient and Sustainable Urban Energy

et al. 2021

View full text Add to dashboard Cite

Krakow has an extensive district heating network, which is approximately 900 km long. It is the second largest city in terms of the number of inhabitants in Poland, resulting in a high demand for energy—for both heating and cooling. The district heating of the city is based on coal. The paper presents the conception of using the available renewable sources to integrate them into the city’s heating system, increasing the flexibility of the system and its decentralization. An innovative solution of the use of hybrid, modular heat pumps with power dependent on the needs of customers in a given location and combining them with geothermal waters and photovoltaics is presented. The potential of deep geothermal waters is based on two reservoirs built of carbonate rocks, namely Devonian and Upper Jurassic, which mainly consist of dolomite and limestone. The theoretical potential of water intake equal to the nominal heating capacity of a geothermal installation is estimated at 3.3 and 2.0 MW, respectively. Shallow geothermal energy potential varies within the city, reflecting the complex geological structure of the city. Apart from typical borehole heat exchangers (BHEs), the shallower water levels may represent a significant potential source for both heating and cooling by means of water heat pumps. For the heating network, it has been proposed to use modular heat pumps with hybrid sources, which will allow for the flexible development of the network in places previously unavailable or unprofitable. In the case of balancing production and demand, a photovoltaic installation can be an effective and sufficient source of electricity that will cover the annual electricity demand generated by the heat pump installation, when it is used for both heating and cooling. The alternating demand of facilities for heating and cooling energy, caused by changes in the seasons, suggests potential for using seasonal cold and heat storage.

show abstract

Simulating thermal pollution caused by a hypothetical groundwater heat pump system under different climate, operation and hydrogeological conditions

Cited by 6 publications

References 23 publications

The role of regulation in geothermal energy in the UK

The role of regulation in geothermal energy in the UK

Global Sensitivity Analysis and Uncertainty Quantification for Design Parameters of Shallow Geothermal Systems

Upgrading a District Heating System by Means of the Integration of Modular Heat Pumps, Geothermal Waters, and PVs for Resilient and Sustainable Urban Energy

Contact Info

Product

Resources

About