Development of a novel vapor compression refrigeration system (VCRS) for permafrost cooling

Hu, Tianliang; Liu, Jiankun; Chang, Jian; Zhang, Hao

doi:10.1016/j.coldregions.2020.103173

Cited by 13 publications

(5 citation statements)

References 52 publications

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“…Transportation infrastructure. Considering the impact of climate warming, transportation infrastructure built on thaw sensitive permafrost should be protected, either by cooling the underlying permafrost or by considering pre-thawing to adapt and mitigate the impact of climate warming 40,124,[126][127][128] (FIG. 6).…”

Section: Mitigation Methodsmentioning

confidence: 99%

Impacts of permafrost degradation on infrastructure

Hjort

Streletskiy

Doré

et al. 2022

Nat Rev Earth Environ

265

102

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Degradation of permafrost damages infrastructure and can jeopardize the sustainable development of polar and high-altitude regions. Warming and thawing of ice-rich permafrost is related to several natural hazards, which can pose a serious threat to the integrity of constructions and the economy. In this Review, we explore the extent and costs of observed and predicted infrastructure damages, and methods to mitigate adverse consequences of permafrost degradation. We also present the diversity of permafrost hazards and problems associated with construction and development in permafrost areas.Finally, we highlight seven topics to support sustainable infrastructure in the future. The observed damages are substantial and cumulative problems of infrastructure can be exacerbated owing to the increasing human activity in permafrost areas and climate change.It has been estimated that from one-third to more than half of critical circumpolar infrastructure could be at risk by mid-century. Permafrost degradation-related infrastructure costs could rise to tens of billion US dollars by the second half of the century.To successfully manage with climate change effects in permafrost areas a better understanding is needed about which constructions are likely to be affected by permafrost degradation. Especially, mitigation measures are needed to secure existing infrastructure and future development projects. Key points• Operational infrastructure is critical for sustainable development of Arctic and highaltitude communities, but the integrity of constructions is jeopardized by degrading permafrost.• The extent of observed damages is substantial (up to tens of percentages of infrastructure elements) and is likely to increase with climate warming.• From one-third to more than 50% of fundamental circumpolar infrastructure is at risk by mid-century.• Engineering solutions to mitigate the effects of degrading permafrost exist but their economic cost is high at regional scales.• There is a need to quantify the economic impacts of climate change on infrastructure and occurrence of permafrost-related infrastructure failure across the permafrost areas.• Future development projects should conduct local-scale infrastructure risk assessments and apply mitigation measures to avoid detrimental effects on constructions, socioeconomic activities, and ecosystems in permafrost areas under rapidly changing climatic conditions.

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Section: Mitigation Methodsmentioning

confidence: 99%

Impacts of permafrost degradation on infrastructure

Hjort

Streletskiy

Doré

et al. 2022

Nat Rev Earth Environ

265

102

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“…The difference between the temperature of the evaporation chamber and the evaporation temperature of the refrigerant is more considerable. Furthermore, the working efficiency of the refrigeration system is higher [28,29]. As a consequence, the temperature of the drilling fluid drops rapidly.…”

Section: Effect Of Insulation Layer Thickness On Freezing Time and The Temperature Of Drilling Fluidmentioning

confidence: 99%

“…Therefore, the temperature drops rapidly. The inner wall temperature drops with time, and the refrigeration efficiency decreases [28,29]. Consequently, the inner wall temperature drops slowly with the increase of time.…”

Section: Relationship Between the Inner Wall Temperature And Timementioning

confidence: 99%

Experimental Study on the Insulation Layer Thickness of a Novel Ice Coring Device in Loose Sandstone-Type Uranium Deposits

Huang

Peng

et al. 2021

Energies

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The target strata of sandstone-type uranium deposits are usually located in the fragile and loose strata, which makes it difficult to obtain core samples; consequently, a novel ice coring device for loose sandstone-type uranium deposits is proposed to solve this problem. Experiments proved that the artificial sample can replace the natural sample, and the coring method has high reliability. Ensuring the allegro formation of an ice valve with a given cold source is critical for this coring system, and reducing the loss of cold energy with help of insulation layer is one of the methods to speed up the formation of ice valve. Since the diameter of the drill tool is limited by its working scenario, the thickness of insulation layer is limited to ensure the size of core. Therefore, this paper conducted laboratory experiments of the insulation layer with different thicknesses to study the effect of the insulation layer on the formation of the sand–ice valve. Results show that the insulation layer can reduce the loss of cold energy during the freezing process and significantly affect the formation time of the sand–ice valve. When the thickness of the aerogel insulation layer is 2 mm, the freezing time is 44% shorter than that without insulation layer. According to the tests, the novel ice coring device is expected to solve the coring problem in loose sandstone-type uranium deposits.

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“…Efficiency applications in refrigeration systems, the compressor working fluid or refrigerant is generally intervened. 4,5 This major practice area of cooling technologies and the fact that existing cooling systems generate high levels of energy consumption and environmental emissions have encouraged researchers to find new efficiency methods. During the past years, a number of experimental studies have been done to get to know the performance of cooling systems and find ways to enhance them from different perspectives.…”

Section: Introductionmentioning

confidence: 99%

An effective strategy for decreased energy consumption by using Fe₃O₄ + CeO₂ @ POE in Cooling system

Akkaya

2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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With a view to decreasing the energy consumption in cooling systems, many different methods have been used at the present time. One of these methods is the addition of solid nanoparticles to the compressor lubricant in order to increase the heat transfer surface. In this context, single and hybrid nanolubricants have been prepared by adding nano-sized iron (II, III) oxide (Fe3O4) and cerium oxide (CeO2) hybrid nanoparticles into polyol ester (POE) at different mass ratios by weight. 0.3% and 0.6% by weight of single Fe3O4 and hybrid Fe3O4 + CeO2 nanoparticles were added to this colloidal suspension separately. In addition, a 0.3% volume fraction of the surfactant triton X-100 (TX-100) was added to each suspension to avoid folliculations in nanolubricants. An experimental study was conducted under two different mass fraction single and hybrid nanolubricant to compressor section of the cooling system, respectively. The maximum improvement in coefficient of performance (COP) and the decrease in compressor work were found to be as 11.84% and 16.73%, respectively, when the hybrid nanolubricant was used as compressor lubricant.

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Development of a novel vapor compression refrigeration system (VCRS) for permafrost cooling

Cited by 13 publications

References 52 publications

Impacts of permafrost degradation on infrastructure

Impacts of permafrost degradation on infrastructure

Experimental Study on the Insulation Layer Thickness of a Novel Ice Coring Device in Loose Sandstone-Type Uranium Deposits

An effective strategy for decreased energy consumption by using Fe₃O₄ + CeO₂ @ POE in Cooling system

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Development of a novel vapor compression refrigeration system (VCRS) for permafrost cooling

Cited by 13 publications

References 52 publications

Impacts of permafrost degradation on infrastructure

Impacts of permafrost degradation on infrastructure

Experimental Study on the Insulation Layer Thickness of a Novel Ice Coring Device in Loose Sandstone-Type Uranium Deposits

An effective strategy for decreased energy consumption by using Fe3O4 + CeO2 @ POE in Cooling system

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Product

Resources

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An effective strategy for decreased energy consumption by using Fe₃O₄ + CeO₂ @ POE in Cooling system