Indirect solar receiver development for the thermal extraction of H2O(v) from lunar regolith: Heat and mass transfer modeling

Schieber, Garrett L.; Jones, Brant M.; Orlando, Thomas M.; Loutzenhiser, Peter G.

doi:10.1016/j.actaastro.2021.09.020

Cited by 9 publications

(4 citation statements)

References 38 publications

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“…The pore‐filling fraction F can be defined as (Reiss, 2018):

F=\frac{{V}_{i}}{{V}_{dry}\phi }=\frac{{\rho }_{dry}\left(\frac{1}{1-{C}_{i}}-1\right)}{\phi {\rho }_{i}}

where V i and V dry are the volume ratio of ice and dry regolith, respectively, ρ i is the density of ice. And the porosity ϕ of the regolith is calculated as (Schieber et al., 2022):

\phi =1-\left(\frac{{\rho }_{dry,b}}{{\rho }_{dry}}+\frac{{\rho }_{i,b}}{{\rho }_{i}}\right)

with the particle density of the dry regolith ρ dry = 3,240 kg/m 3 (Heiken et al, 1991), and the density of ice ρ i = 916.7 kg/m 3 (Petrenko & Whitworth, 1999).…”

Section: Methodsmentioning

confidence: 99%

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Oven Design for In‐Situ Thermal Extraction of Volatiles From Lunar Regolith

Ruan,

Yang,

Hao

et al. 2024

Earth and Space Science

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Extracting volatiles from lunar regolith for analysis or utilization is one of the most important aspects of future lunar exploration. However, the low thermal conductivity of lunar regolith poses a challenge. Here, we conduct simulations to analyze the heat and mass transfer processes within the sample inside the oven. We identify three main factors affecting oven heat‐up rate: water ice content (WIC) in the regolith, oven diameter, and power supply. Taking these factors into account, we devise an oven design and apply it to three case studies: (a) assessing water ice and isotopic composition in Permanently Shadowed Regions, akin to Chang'e‐7 mini‐fly probe missions; (b) measuring noble gases, as Chang'e‐7 and Luna‐27 landers; and (c) large‐scale in‐situ resources utilization (ISRU). The simulation results indicate that water ice can be extracted using sufficiently high heating power without issues. However, the complete extraction of noble gases is challenging and may require alternative heating methods. For ISRU purposes, large ovens can be subdivided into smaller ones by adding internal structures, for example, honeycomb, to improve the heat‐up rate by at least 1.5 times. Additionally, we find that the oven can serve as a scientific payload for WIC measurement using the heating curve. A flowchart of this new WIC measurement method is provided, offering an alternative method to mass spectrometry or spectroscopy measurements.

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“…The pore‐filling fraction F can be defined as (Reiss, 2018):

F=\frac{{V}_{i}}{{V}_{dry}\phi }=\frac{{\rho }_{dry}\left(\frac{1}{1-{C}_{i}}-1\right)}{\phi {\rho }_{i}}

where V i and V dry are the volume ratio of ice and dry regolith, respectively, ρ i is the density of ice. And the porosity ϕ of the regolith is calculated as (Schieber et al., 2022):

\phi =1-\left(\frac{{\rho }_{dry,b}}{{\rho }_{dry}}+\frac{{\rho }_{i,b}}{{\rho }_{i}}\right)

with the particle density of the dry regolith ρ dry = 3,240 kg/m 3 (Heiken et al, 1991), and the density of ice ρ i = 916.7 kg/m 3 (Petrenko & Whitworth, 1999).…”

Section: Methodsmentioning

confidence: 99%

“…where V i and V dry are the volume ratio of ice and dry regolith, respectively, ρ i is the density of ice. And the porosity ϕ of the regolith is calculated as (Schieber et al, 2022):…”

Section: Thermal Conductivity Modelmentioning

confidence: 99%

Oven Design for In‐Situ Thermal Extraction of Volatiles From Lunar Regolith

Ruan,

Yang,

Hao

et al. 2024

Earth and Space Science

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“…Therefore, thermal mining methods were proposed. 27,[90][91][92][93] As illustrated in Figure 3A, the conducted sunlight or other 16,160,161 heat sources heats ices to sublimate or evaporate, which is then collected by a cold trap device.…”

Section: Extraterrestrial In Situ Resource Utilization Technology Wat...mentioning

confidence: 99%

“…26 At present, thermal mining based on solar energy to produce oxygen has been widely favored. 27 However, water ice resources exist in the permanent shadows of craters in the south-polar region of the moon. How to guide sunlight to exploit it through photothermal conversion is a vital issue in current research.…”

Section: Introductionmentioning

confidence: 99%