Heat transfer performance of pulsating heat pipe with zeotropic immiscible binary mixtures

Xu, Rong; Zhang, Chao; Chen, Hao; Wu, Qingping; Wang, Ruixiang

doi:10.1016/j.ijheatmasstransfer.2019.03.070

Cited by 53 publications

(14 citation statements)

References 22 publications

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“…Experiments was conducted by using a newly fabricated oscillating heat pipe setup consists of copper tubes, glass tube, silicon rubber tube, mica heater, condenser, K-type thermocouple, glass wool, data acquisition system, and heat control unit respectively. Acetone with four turns oscillating heat pipe was used to determine the thermal performance of the OHP system [25][26][27][28][29][30]. The physical and thermodynamic properties of Acetone (working fluid) is tabulated in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Assessment and Prediction of Heat Transfer Performance of Oscillating Heat Pipe using Acetone

Prashanth¹,

Madhu²,

Ramanarasimha³

et al. 2022

ARFMTS

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Heat pipe is a device to enhance the performance of heat transfer, in particular to transition phase change process. The present investigation is carried out to measure the thermal performance of a closed loop acetone filled oscillating heat pipe with four turns is fabricated and tested. The test was carried out for the inner diameter of 1.7 mm copper tube by varying the acetone of 50%, 60%, 70% and 80% filler ratio with a heat input of 15 W to 40 W in steps of 5 W has been considered. The results shows that 80% acetone filled OHP provides the better thermal performance with an average minimum temperature difference between condenser and evaporator by 6.03%, heat transfer coefficient increased by 77% and the thermal resistance decrease by 43% respectively. The mathematical modelling was developed to predict the performance of the heat transfer. The model clearly shows that the independent variables are statistically significant with a p-value of 0.05 and the uncertainty analysis between the experimental and predicted values are less than 10%.

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Section: Methodsmentioning

confidence: 99%

Assessment and Prediction of Heat Transfer Performance of Oscillating Heat Pipe using Acetone

Prashanth¹,

Madhu²,

Ramanarasimha³

et al. 2022

ARFMTS

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“…The heat energy is directly delivered by the oscillation motion of working fluids in PHP. The thermal performance of PHP varied from different parameters, which are the operation parameters (eg, inclination angle and filled ratio), 10,11 thermodynamics parameters (eg, working fluids and surfactant solution), 12‐24 and geometric parameters (eg, cross‐section shape, inner diameter, turns, and heat pipe materials) 25‐29 . Especially, it is much more worth to further discuss the effect of thermodynamic parameters on the heat transfer mechanism of PHP.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasonic on the enhancement of heat transfer for pulsating heat pipe

Zhang

Jiang

et al. 2021

Int J Energy Res

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Summary The pulsating heat pipe (PHP) has become one of the most promising devices to dramatically remove heat for electronic devices. This work focuses on the experimental investigation of ultrasonic on the enhancement of heat transfer of PHP, and further discusses this effect at the different working fluids. The results indicate that the external region of PHP exhibits more intense oscillation motion of working fluids than that of internal‐region. The heat transfer performance enhanced assisted with the ultrasonic at the heating power of 5 to 20 W but deteriorated at 25 W. For details, the heat transfer coefficient (HTC) increased 72.6%, and the internal and external start‐up times reduced 57.8% and 2.2%, respectively. Furthermore, the numerous vapors confirm that the ultrasonic cavitation would effectively accelerate the phase transition. Finally, it also discusses the couple effect between the ultrasonic and different working fluids on heat transfer coefficient. The maximum HTC of 1.85 is obtained at the heating power of 15 W for the PHP charged with acetone. In addition, the trend of HTC of PHP filled with acetone shows much more stable assisted with ultrasonic varying from the heating power inputs. Highlights The thermal performance was revealed by internal and external region of PHP The directly enhanced method of ultrasonic cavitation was introduced The novel index of the heat transfer coefficient (HTC) was proposed The couple effect ultrasonic on the enhancement of heat transfer was discussed with different working fluids

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“…Xu vd. [19] de-iyonize su ve HFE-7100'ün karıştırılmasıyla elde ettikleri zeotropik bir ikili karışımı, iş akışkanı olarak kullanmışlar ve farklı karışım oranları (4:1, 2:1, 1:1, 1:2 ve 1:4), eğim açıları (30 o -90 o ) ve ısıl yüklerde, düz plaka tipi atımlı ısı borusunun ısı transfer performansını incelemişlerdir. %50 olarak tek bir dolum oranında çalışmışlardır.…”

Section: Introductionunclassified

Düşük Dolum Oranında İkili Karışımlarla Yüklü Üniform Olmayan Atımlı Isı Borusunun Deneysel İncelenmesi

Markal

Varol

2021

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Bu çalışmada, düşük bir dolum oranında ikili karışımlarla yüklü, üniform olmayan kanal profiline sahip düz plakalı kapalı döngülü atımlı bir ısı borusunun ısıl performansı ve akış davranışı deneysel olarak incelenmiştir. Deneyler kapsamında iş akışkanı olarak, etanol (E) ve metanolün (M) farklı hacim oranları (E:M = 1:1, 1:2 ve 2:1) için elde edilen ikili karışımları kullanılmıştır. Dolum oranı %20 olarak sabit tutulmuş olup; 0 o , 45 o ve 90 o olmak üzere üç farklı eğim açısında çalışılmıştır. Akış davranışı yüksek hızlı kamera ile elde edilen eş zamanlı görüntüler üzerinden irdelenmiştir (saniyede 1000 görüntü). Yapılan çalışma sonucunda; karışım oranının çalışmaya başlama performansı üzerinde önemli bir etkiye sahip olduğu; artan metanol oranı ile ısıl performansın arttığı ve ısı borusunun, tüm karışım oranlarında, yer çekimi desteği olmadan da çalışabildiği belirlenmiştir. Isı transfer karakteristiklerinde artan eğim açısıyla iyileşme gözlemlenmiştir. Akış görüntüleri aracılığıyla, akış pasajları içerisindeki fiziksel olaylar tanımlanmıştır.

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Heat transfer performance of pulsating heat pipe with zeotropic immiscible binary mixtures

Cited by 53 publications

References 22 publications

Assessment and Prediction of Heat Transfer Performance of Oscillating Heat Pipe using Acetone

Assessment and Prediction of Heat Transfer Performance of Oscillating Heat Pipe using Acetone

Effect of ultrasonic on the enhancement of heat transfer for pulsating heat pipe

Düşük Dolum Oranında İkili Karışımlarla Yüklü Üniform Olmayan Atımlı Isı Borusunun Deneysel İncelenmesi

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