The Effects of Gravity on the Pressure Drop and Heat Transfer Characteristics of Steam in Microchannels: An Experimental Study
Experiments were carried out to investigate the pressure drop and heat transfer behaviors of a microchannel condenser. The effects of gravity on the condensation of steam in the microchannels were investigated for both horizontal and vertical cases. For the experimental results, the pressure drop of...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-07-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/13/14/3575 |
| _version_ | 1797562729711534080 |
|---|---|
| author | Minhhung Doan Thanhtrung Dang Xuanvien Nguyen |
| author_facet | Minhhung Doan Thanhtrung Dang Xuanvien Nguyen |
| author_sort | Minhhung Doan |
| collection | DOAJ |
| description | Experiments were carried out to investigate the pressure drop and heat transfer behaviors of a microchannel condenser. The effects of gravity on the condensation of steam in the microchannels were investigated for both horizontal and vertical cases. For the experimental results, the pressure drop of vertical microchannels in the condenser is lower than for horizontal microchannels. In the case of the horizontal microchannel, as the mass flow rate of steam increases from 0.01 g·s<sup>−1</sup> to 0.06 g·s<sup>−1</sup>, the pressure drop increases from 1.5 kPa to 50 kPa, respectively. While the mass flow rate of steam in the vertical microchannel case increases from 0.01 g·s<sup>−1</sup> to 0.06 g·s<sup>−1</sup>, the pressure drop increases from 2.0 kPa to 44 kPa, respectively. This clearly indicates that the gravitational acceleration affects the pressure drop. The pressure drop of the vertical microchannel is lower than that obtained from the horizontal microchannel. In addition, the capacity of the condenser is the same in both cases. This leads to the performance index obtained from the vertical microchannel condenser being higher than that obtained from the horizontal microchannel condenser. These results are important contributions to the research on the condensation of steam in microchannels. |
| first_indexed | 2024-03-10T18:33:05Z |
| format | Article |
| id | doaj.art-ee32783f4c80493faa421672ad7e9331 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T18:33:05Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-ee32783f4c80493faa421672ad7e93312023-11-20T06:29:24ZengMDPI AGEnergies1996-10732020-07-011314357510.3390/en13143575The Effects of Gravity on the Pressure Drop and Heat Transfer Characteristics of Steam in Microchannels: An Experimental StudyMinhhung Doan0Thanhtrung Dang1Xuanvien Nguyen2Department of Thermal Engineering, HCMC University of Technology and Education, Ho Chi Minh City 700000, VietnamDepartment of Thermal Engineering, HCMC University of Technology and Education, Ho Chi Minh City 700000, VietnamDepartment of Thermal Engineering, HCMC University of Technology and Education, Ho Chi Minh City 700000, VietnamExperiments were carried out to investigate the pressure drop and heat transfer behaviors of a microchannel condenser. The effects of gravity on the condensation of steam in the microchannels were investigated for both horizontal and vertical cases. For the experimental results, the pressure drop of vertical microchannels in the condenser is lower than for horizontal microchannels. In the case of the horizontal microchannel, as the mass flow rate of steam increases from 0.01 g·s<sup>−1</sup> to 0.06 g·s<sup>−1</sup>, the pressure drop increases from 1.5 kPa to 50 kPa, respectively. While the mass flow rate of steam in the vertical microchannel case increases from 0.01 g·s<sup>−1</sup> to 0.06 g·s<sup>−1</sup>, the pressure drop increases from 2.0 kPa to 44 kPa, respectively. This clearly indicates that the gravitational acceleration affects the pressure drop. The pressure drop of the vertical microchannel is lower than that obtained from the horizontal microchannel. In addition, the capacity of the condenser is the same in both cases. This leads to the performance index obtained from the vertical microchannel condenser being higher than that obtained from the horizontal microchannel condenser. These results are important contributions to the research on the condensation of steam in microchannels.https://www.mdpi.com/1996-1073/13/14/3575heat transfercooling watermicrochannelpressure dropcondenser |
| spellingShingle | Minhhung Doan Thanhtrung Dang Xuanvien Nguyen The Effects of Gravity on the Pressure Drop and Heat Transfer Characteristics of Steam in Microchannels: An Experimental Study Energies heat transfer cooling water microchannel pressure drop condenser |
| title | The Effects of Gravity on the Pressure Drop and Heat Transfer Characteristics of Steam in Microchannels: An Experimental Study |
| title_full | The Effects of Gravity on the Pressure Drop and Heat Transfer Characteristics of Steam in Microchannels: An Experimental Study |
| title_fullStr | The Effects of Gravity on the Pressure Drop and Heat Transfer Characteristics of Steam in Microchannels: An Experimental Study |
| title_full_unstemmed | The Effects of Gravity on the Pressure Drop and Heat Transfer Characteristics of Steam in Microchannels: An Experimental Study |
| title_short | The Effects of Gravity on the Pressure Drop and Heat Transfer Characteristics of Steam in Microchannels: An Experimental Study |
| title_sort | effects of gravity on the pressure drop and heat transfer characteristics of steam in microchannels an experimental study |
| topic | heat transfer cooling water microchannel pressure drop condenser |
| url | https://www.mdpi.com/1996-1073/13/14/3575 |
| work_keys_str_mv | AT minhhungdoan theeffectsofgravityonthepressuredropandheattransfercharacteristicsofsteaminmicrochannelsanexperimentalstudy AT thanhtrungdang theeffectsofgravityonthepressuredropandheattransfercharacteristicsofsteaminmicrochannelsanexperimentalstudy AT xuanviennguyen theeffectsofgravityonthepressuredropandheattransfercharacteristicsofsteaminmicrochannelsanexperimentalstudy AT minhhungdoan effectsofgravityonthepressuredropandheattransfercharacteristicsofsteaminmicrochannelsanexperimentalstudy AT thanhtrungdang effectsofgravityonthepressuredropandheattransfercharacteristicsofsteaminmicrochannelsanexperimentalstudy AT xuanviennguyen effectsofgravityonthepressuredropandheattransfercharacteristicsofsteaminmicrochannelsanexperimentalstudy |