Thermal Soil Radon Mitigation

2021 ◽  
Author(s):  
Francisco Arias ◽  
Salvador De Las Heras
Keyword(s):  
Diffusion Coefficient ◽  
Thermal Energy ◽  
Diffusion Coefficients ◽  
Solar Thermal ◽  
Dimensional Model ◽  
Solar Thermal Energy ◽  
Cold Regions ◽  
One Dimensional ◽  
Soil Radon ◽  
Mitigation Technique

Abstract In this work consideration is given to the possibility for thermal soil radon mitigation. It is known that the diffusion coefficient of radon through minerals and rocks have are characterized by Arrhenius linear plots increasing inasmuch that temperature increases. For the case of rocks, for example, it was observed that a mild heating -less than 100$^o$C, translates into a radon release which can be enhanced by 100 to 1000 times than the normal release at STP. Therefore, it is reasonable to think that if soil is deliberately heated -for example, harnessing solar thermal energy, it is reasonable to think that it could be possible to pump radon from soil because the radon atoms will escape preferentially from cold regions (low diffusion coefficient) toward hot regions (high diffusion coefficients) where a radon sink is located. Utilizing a simplified two-group thermal one-dimensional model an expression was derived which allows a first assessment on this new mitigation technique

scholarly journals The use of underground thermal gradients as technique for soil radon mitigation

2021 ◽  
Author(s):  
Francisco J. Arias ◽  
Salvador De Las Heras
Keyword(s):  
Diffusion Coefficient ◽  
Diffusion Coefficients ◽  
Thermal Gradient ◽  
Short Note ◽  
Point Of View ◽  
Thermal Gradients ◽  
Theoretical Point ◽  
Cold Regions ◽  
Standard Temperature ◽  
Soil Radon

Diffusion coefficients of radon through minerals and rocks are characterised by Arrhenius linear plots, i.e., increasing with temperature. It has been observed, for example, that rocks with a mild heating (<100°C) translate into a radon release that can be enhanced 100–1,000 times than the normal release at STP (Standard Temperature Pressure (STP). Therefore, it is reasonable to think that if the soil is deliberately heated creating a thermal gradient, it could be possible, at least from a theoretical point of view, to thermally pump radon from soil because the radon atoms will escape preferentially from cold regions (low diffusion coefficient) towards hot regions (high diffusion coefficients) if a radon sink is located. In this short note, this approach for soil radon removal is investigated.

Pyrazolium Phase Change Materials for Solar-Thermal and Wind Energy Storage

2019 ◽  
Author(s):  
Karolina Matuszek ◽  
R. Vijayaraghavan ◽  
Craig Forsyth ◽  
Surianarayanan Mahadevan ◽  
Mega Kar ◽  
...  
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
High Efficiency ◽  
Scale Up ◽  
Solar Thermal ◽  
Energy Storage Materials ◽  
Solar Thermal Energy ◽  
Storage Materials

Renewable energy has the ultimate capacity to resolve the environmental and scarcity challenges of the world’s energy supplies. However, both the utility of these sources and the economics of their implementation are strongly limited by their intermittent nature; inexpensive means of energy storage therefore needs to be part of the design. Distributed thermal energy storage is surprisingly underdeveloped in this context, in part due to the lack of advanced storage materials. Here, we describe a novel family of thermal energy storage materials based on pyrazolium cation, that operate in the 100-220°C temperature range, offering safe, inexpensive capacity, opening new pathways for high efficiency collection and storage of both solar-thermal energy, as well as excess wind power. We probe the molecular origins of the high thermal energy storage capacity of these ionic materials and demonstrate extended cycling that provides a basis for further scale up and development.

An oil shale recovery system powered by solar thermal energy

Energy ◽  
2021 ◽  
Vol 225 ◽  
pp. 120096
Author(s):  
Hongjuan Hou ◽  
Qiongjie Du ◽  
Chang Huang ◽  
Le Zhang ◽  
Eric Hu
Keyword(s):  
Thermal Energy ◽  
Oil Shale ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Recovery System ◽  
Shale Recovery
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