Heat collection characteristics of nanofluids in direct absorption solar collector with built-in rotors
As for the uneven heating of the working medium in direct absorption solar collector (DASC),this paper proposed the method of optimizing the flow pattern in DASC by inserting combined rotors into the collector tube to improve the heat collection performance. The working medium used in this paper is...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-01-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23011747 |
| _version_ | 1797356867159064576 |
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| author | Haowei Li Xiahua Zuo Dailing Zhang Hongyuan Yin Weimin Yang Hua Yan Fenghua Zhang Zhiwei Jiao Ying An |
| author_facet | Haowei Li Xiahua Zuo Dailing Zhang Hongyuan Yin Weimin Yang Hua Yan Fenghua Zhang Zhiwei Jiao Ying An |
| author_sort | Haowei Li |
| collection | DOAJ |
| description | As for the uneven heating of the working medium in direct absorption solar collector (DASC),this paper proposed the method of optimizing the flow pattern in DASC by inserting combined rotors into the collector tube to improve the heat collection performance. The working medium used in this paper is Chinese ink nanofluid. The heat collection performance of the collector was studied, and the enhanced mechanism was explained through simulations. Results demonstrated that inserting rotors improved the temperature rise rate in the circuit, and the temperature of the medium after inserting rotors increased by about 56 % compared with that before inserting rotors when the mass fraction of nanoparticles was 0.2 %. In some cases, a small number of rotors can achieve an enhancement effect similar to that of enormous rotors, and improve the economic performance of the system. The numerical simulation results showed that the high-temperature medium in the plain tube is concentrated near the light side, while the medium in the centre and backlight side of the tube cannot easily absorb solar radiation. After rotors were inserted into the tube, the back-side and light-side media were displaced and mixed by the turbulence of rotors, which can improve heat collection. |
| first_indexed | 2024-03-08T14:36:05Z |
| format | Article |
| id | doaj.art-4591db26568440d6a3a50bcb205f7ca3 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-08T14:36:05Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-4591db26568440d6a3a50bcb205f7ca32024-01-12T04:56:44ZengElsevierCase Studies in Thermal Engineering2214-157X2024-01-0153103868Heat collection characteristics of nanofluids in direct absorption solar collector with built-in rotorsHaowei Li0Xiahua Zuo1Dailing Zhang2Hongyuan Yin3Weimin Yang4Hua Yan5Fenghua Zhang6Zhiwei Jiao7Ying An8College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, ChinaGuangzhou Institute of Energy Conversion, Chinese Academy of Sciences (CAS), Guangzhou, 510640, Guangdong, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, ChinaCollege of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China; Corresponding author.As for the uneven heating of the working medium in direct absorption solar collector (DASC),this paper proposed the method of optimizing the flow pattern in DASC by inserting combined rotors into the collector tube to improve the heat collection performance. The working medium used in this paper is Chinese ink nanofluid. The heat collection performance of the collector was studied, and the enhanced mechanism was explained through simulations. Results demonstrated that inserting rotors improved the temperature rise rate in the circuit, and the temperature of the medium after inserting rotors increased by about 56 % compared with that before inserting rotors when the mass fraction of nanoparticles was 0.2 %. In some cases, a small number of rotors can achieve an enhancement effect similar to that of enormous rotors, and improve the economic performance of the system. The numerical simulation results showed that the high-temperature medium in the plain tube is concentrated near the light side, while the medium in the centre and backlight side of the tube cannot easily absorb solar radiation. After rotors were inserted into the tube, the back-side and light-side media were displaced and mixed by the turbulence of rotors, which can improve heat collection.http://www.sciencedirect.com/science/article/pii/S2214157X23011747Combined rotorsDirect absorption solar collectorNanofluidsHeat collection characteristics |
| spellingShingle | Haowei Li Xiahua Zuo Dailing Zhang Hongyuan Yin Weimin Yang Hua Yan Fenghua Zhang Zhiwei Jiao Ying An Heat collection characteristics of nanofluids in direct absorption solar collector with built-in rotors Case Studies in Thermal Engineering Combined rotors Direct absorption solar collector Nanofluids Heat collection characteristics |
| title | Heat collection characteristics of nanofluids in direct absorption solar collector with built-in rotors |
| title_full | Heat collection characteristics of nanofluids in direct absorption solar collector with built-in rotors |
| title_fullStr | Heat collection characteristics of nanofluids in direct absorption solar collector with built-in rotors |
| title_full_unstemmed | Heat collection characteristics of nanofluids in direct absorption solar collector with built-in rotors |
| title_short | Heat collection characteristics of nanofluids in direct absorption solar collector with built-in rotors |
| title_sort | heat collection characteristics of nanofluids in direct absorption solar collector with built in rotors |
| topic | Combined rotors Direct absorption solar collector Nanofluids Heat collection characteristics |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23011747 |
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