Design and Verification of a Deep Rock Corer with Retaining the In Situ Temperature
Deep rock is always under high-temperature conditions. However, traditional coring methods generally have no thermal insulation design, which introduces large deviations in the guidance required for resource mining. Thus, a thermal insulation design that utilizes active and passive thermal insulatio...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8894286 |
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| _version_ | 1832560327930150912 |
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| author | Zhiqiang He Heping Xie Mingzhong Gao Ling Chen Bo Yu Yunqi Hu Jianping Yang |
| author_facet | Zhiqiang He Heping Xie Mingzhong Gao Ling Chen Bo Yu Yunqi Hu Jianping Yang |
| author_sort | Zhiqiang He |
| collection | DOAJ |
| description | Deep rock is always under high-temperature conditions. However, traditional coring methods generally have no thermal insulation design, which introduces large deviations in the guidance required for resource mining. Thus, a thermal insulation design that utilizes active and passive thermal insulation was proposed for deep rock corers. The rationale behind the active thermal insulation scheme was to maintain the in situ core temperature through electric heating that was controlled by using a proportional-integral-derivative (PID) chip. Graphene heating material could be used as a heating material for active thermal insulation through testing. In regard to the passive thermal insulation scheme, we conducted insulation and microscopic and insulation effectiveness tests for hollow glass microsphere (HGM) composites and SiO2 aerogels. Results showed that the #1 HGM composite (C1) had an excellent thermal insulation performance (3 mm thick C1 can insulate to 82.6°C), high reflectivity (90.02%), and wide applicability. Therefore, C1 could be used as a passive insulation material in deep rock corers. Moreover, a heat transfer model that considered multiple heat dissipation surfaces was established, which can provide theoretical guidance for engineering applications. Finally, a verification test of the integrated active and passive thermal insulation system (graphene heating material and C1) was carried out. Results showed that the insulating effect could be increased by 13.3%; thus, the feasibility of the integrated thermal insulation system was verified. The abovementioned design scheme and test results provide research basis and guidance for the development of thermally insulated deep rock coring equipment. |
| format | Article |
| id | doaj-art-8fa696ee47db4a179a96ffb6c5335cd1 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-8fa696ee47db4a179a96ffb6c5335cd12025-02-03T01:27:54ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88942868894286Design and Verification of a Deep Rock Corer with Retaining the In Situ TemperatureZhiqiang He0Heping Xie1Mingzhong Gao2Ling Chen3Bo Yu4Yunqi Hu5Jianping Yang6State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, ChinaSchool of Mechanical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Mechanical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Mechanical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Polymer Science and Engineering, Sichuan University, Chengdu 610065, ChinaDeep rock is always under high-temperature conditions. However, traditional coring methods generally have no thermal insulation design, which introduces large deviations in the guidance required for resource mining. Thus, a thermal insulation design that utilizes active and passive thermal insulation was proposed for deep rock corers. The rationale behind the active thermal insulation scheme was to maintain the in situ core temperature through electric heating that was controlled by using a proportional-integral-derivative (PID) chip. Graphene heating material could be used as a heating material for active thermal insulation through testing. In regard to the passive thermal insulation scheme, we conducted insulation and microscopic and insulation effectiveness tests for hollow glass microsphere (HGM) composites and SiO2 aerogels. Results showed that the #1 HGM composite (C1) had an excellent thermal insulation performance (3 mm thick C1 can insulate to 82.6°C), high reflectivity (90.02%), and wide applicability. Therefore, C1 could be used as a passive insulation material in deep rock corers. Moreover, a heat transfer model that considered multiple heat dissipation surfaces was established, which can provide theoretical guidance for engineering applications. Finally, a verification test of the integrated active and passive thermal insulation system (graphene heating material and C1) was carried out. Results showed that the insulating effect could be increased by 13.3%; thus, the feasibility of the integrated thermal insulation system was verified. The abovementioned design scheme and test results provide research basis and guidance for the development of thermally insulated deep rock coring equipment.http://dx.doi.org/10.1155/2020/8894286 |
| spellingShingle | Zhiqiang He Heping Xie Mingzhong Gao Ling Chen Bo Yu Yunqi Hu Jianping Yang Design and Verification of a Deep Rock Corer with Retaining the In Situ Temperature Advances in Civil Engineering |
| title | Design and Verification of a Deep Rock Corer with Retaining the In Situ Temperature |
| title_full | Design and Verification of a Deep Rock Corer with Retaining the In Situ Temperature |
| title_fullStr | Design and Verification of a Deep Rock Corer with Retaining the In Situ Temperature |
| title_full_unstemmed | Design and Verification of a Deep Rock Corer with Retaining the In Situ Temperature |
| title_short | Design and Verification of a Deep Rock Corer with Retaining the In Situ Temperature |
| title_sort | design and verification of a deep rock corer with retaining the in situ temperature |
| url | http://dx.doi.org/10.1155/2020/8894286 |
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