Non-Contact Monitoring on the Flow Status inside a Pulsating Heat Pipe
The paper presents a concept of thermal-to-electrical energy conversion by using the oscillatory motion of magnetic fluid slugs which has potential to be applied in the field of sensors. A pulsating heat pipe (PHP) is introduced to produce vapor-magnetic fluid plug–slug flow in a snake-shaped capill...
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doaj-040559eda1c044cdb6bdefe1467e298a2020-11-25T03:53:17ZengMDPI AGSensors1424-82202020-10-01205955595510.3390/s20205955Non-Contact Monitoring on the Flow Status inside a Pulsating Heat PipeYang Chen0Yongqing He1Xiaoqin Zhu2School of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, ChinaSchool of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, ChinaSchool of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, ChinaThe paper presents a concept of thermal-to-electrical energy conversion by using the oscillatory motion of magnetic fluid slugs which has potential to be applied in the field of sensors. A pulsating heat pipe (PHP) is introduced to produce vapor-magnetic fluid plug–slug flow in a snake-shaped capillary tube. As the magnetic fluid is magnetized by the permanent magnet, the slugs of magnetic fluid passing through the copper coils make the magnetic flux vary and produce the electromotive force. The peak values of induced voltage observed in our tests are from 0.1 mV to 4.4 mV. The effects of the slug velocity, heat input and magnetic particle volume concentration on the electromotive force are discussed. Furthermore, a theoretical model considering the fluid velocity of the working fluid, the inner radius of the PHP and the contact angle between the working fluid and the pipe wall is established. At the same time, the theoretical and experimental results are compared, and the influences of tube inner radius, working fluid velocity and contact angle on the induced electromotive force are analyzed.https://www.mdpi.com/1424-8220/20/20/5955pulsating heat pipeelectromagneticsmagnetic fluidsmagnetism theorysensors |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yang Chen Yongqing He Xiaoqin Zhu |
spellingShingle |
Yang Chen Yongqing He Xiaoqin Zhu Non-Contact Monitoring on the Flow Status inside a Pulsating Heat Pipe Sensors pulsating heat pipe electromagnetics magnetic fluids magnetism theory sensors |
author_facet |
Yang Chen Yongqing He Xiaoqin Zhu |
author_sort |
Yang Chen |
title |
Non-Contact Monitoring on the Flow Status inside a Pulsating Heat Pipe |
title_short |
Non-Contact Monitoring on the Flow Status inside a Pulsating Heat Pipe |
title_full |
Non-Contact Monitoring on the Flow Status inside a Pulsating Heat Pipe |
title_fullStr |
Non-Contact Monitoring on the Flow Status inside a Pulsating Heat Pipe |
title_full_unstemmed |
Non-Contact Monitoring on the Flow Status inside a Pulsating Heat Pipe |
title_sort |
non-contact monitoring on the flow status inside a pulsating heat pipe |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2020-10-01 |
description |
The paper presents a concept of thermal-to-electrical energy conversion by using the oscillatory motion of magnetic fluid slugs which has potential to be applied in the field of sensors. A pulsating heat pipe (PHP) is introduced to produce vapor-magnetic fluid plug–slug flow in a snake-shaped capillary tube. As the magnetic fluid is magnetized by the permanent magnet, the slugs of magnetic fluid passing through the copper coils make the magnetic flux vary and produce the electromotive force. The peak values of induced voltage observed in our tests are from 0.1 mV to 4.4 mV. The effects of the slug velocity, heat input and magnetic particle volume concentration on the electromotive force are discussed. Furthermore, a theoretical model considering the fluid velocity of the working fluid, the inner radius of the PHP and the contact angle between the working fluid and the pipe wall is established. At the same time, the theoretical and experimental results are compared, and the influences of tube inner radius, working fluid velocity and contact angle on the induced electromotive force are analyzed. |
topic |
pulsating heat pipe electromagnetics magnetic fluids magnetism theory sensors |
url |
https://www.mdpi.com/1424-8220/20/20/5955 |
work_keys_str_mv |
AT yangchen noncontactmonitoringontheflowstatusinsideapulsatingheatpipe AT yongqinghe noncontactmonitoringontheflowstatusinsideapulsatingheatpipe AT xiaoqinzhu noncontactmonitoringontheflowstatusinsideapulsatingheatpipe |
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