Investigation on Heat Transfer Performance of Rotating Heat Pipe Grinding Wheel in Dry Profile Grinding

The use of fluid in grinding enhances heat exchange at the contact zone and reduces grinding temperature. However, the massive use of fluid can cause negative influences on environment and machining cost. In this paper, a novel method of reducing grinding temperature based on heat pipe technology is proposed. One new heat pipe grinding wheel and its heat transfer principle are briefly introduced. A heat transfer mathematical model is established to calculate equivalent thermal conductivity of heat pipe grinding wheel. Compared with the wheel without heat pipe, heat transfer effect of heat pipe grinding wheel is presented, and the influences of heat flux input, cooling condition, wheel speed, and liquid film thickness on heat transfer performance are investigated. Furthermore, dry grinding experiments with two different wheels are conducted to verify the cooling effectiveness on grinding temperature. The results show that thermal conductivity of the wheel with heat pipe can be greatly improved compared to the one without heat pipe; heat transfer performance of heat pipe grinding wheel can change with different grinding conditions; meanwhile, grinding temperatures can be significantly decreased by 50% in dry grinding compared with the wheel without heat pipe.

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Effect of Processing Parameters on Heat Transfer Performance of the Heat-Pipe Grinding Wheel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.217-219.2480 ◽

2012 ◽

Vol 217-219 ◽

pp. 2480-2483

Author(s):

Ke Ma ◽

Yu Can Fu ◽

Hong Jun Xu ◽

Jun He

Keyword(s):

Heat Transfer ◽

Heat Pipe ◽

Heat Transfer Performance ◽

Processing Parameters ◽

Grinding Wheel ◽

Transfer Performance ◽

Filling Rate ◽

Great Role ◽

Transfer Experiment ◽

Rotating Speed

Heat transfer performance of the heat-pipe grinding wheel (HPGW) is mainly depended on the heat pipe in the wheel. In this paper, a basal body of HPGW was developed and a heat transfer experiment was performed to study the effect of the parameters of the heat pipe such as liquid filling ratio and rotating speed on the heat transfer performance of the HPGW. Results show that the heat transfer performance decreases if the liquid filling rate is too large or too small under the same heat source intensity and the optimal liquid filling rate is about 35% of the volume inside the heat pipe. The heat transfer performance of the HPGW is enhanced with the increasing of the rotating speed. The analysis of the results also shows that the heat pipe in the HPGW can play a great role on enhancing the heat transfer in the grinding zone with suitable processing parameters.

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Heat Transfer Performance of an Axially Rotating Heat Pipe for Cooling of Grinding

Energies ◽

10.3390/en13215745 ◽

2020 ◽

Vol 13 (21) ◽

pp. 5745

Author(s):

Jiajia Chen ◽

Huafei Jiang ◽

Yucan Fu ◽

Ning Qian

Keyword(s):

Heat Transfer ◽

Heat Flux ◽

Heat Pipe ◽

Rotational Speed ◽

Heat Transfer Performance ◽

Simulation Method ◽

Filling Ratio ◽

Grinding Wheel ◽

Good Prospect ◽

Transfer Performance

Coolants are widely used to dissipate grinding heat in conventional grinding. This process, however, is not satisfactory as coolants often lose efficacy in grinding due to film boiling and can result in adverse health and environment effects. The present paper put forward the concept of a rotating heat pipe grinding wheel, attempting to reduce or eliminate the coolant amount and realize green machining. The heat transfer performance of rotating heat pipe grinding wheel was studied by using volume of fluid method in ANSYS/FLUENT. The influence of the input heat flux, filling ratio and rotational speed were investigated by a simulation method. Results show that the appropriate heat flux range for the rotating heat pipe grinding wheel was from 2000 to 100,000 W/m2, the ideal filling ratio was 50% and the rise of the rotational speed turned out to weaken the heat transfer coefficient. Finally, dry grinding experiments on Ti-6Al-4V were performed and the temperatures in both the rotating heat pipe and the grinding contact zone were monitored. The new designed rotating heat pipe grinding wheel showed a good prospect for application to green grinding of difficult-to-cut materials.

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Testing algorithm for heat transfer performance of nanofluid-filled heat pipe based on neural network

Open Physics ◽

10.1515/phys-2020-0170 ◽

2020 ◽

Vol 18 (1) ◽

pp. 751-760

Author(s):

Lei Lei

Keyword(s):

Neural Network ◽

Heat Transfer ◽

Heat Pipe ◽

Heat Transfer Performance ◽

Volume Fraction ◽

Heat Pipes ◽

Transfer Performance ◽

Analysis Model ◽

Accurate Analysis ◽

Testing Algorithm

AbstractTraditional testing algorithm based on pattern matching is impossible to effectively analyze the heat transfer performance of heat pipes filled with different concentrations of nanofluids, so the testing algorithm for heat transfer performance of a nanofluidic heat pipe based on neural network is proposed. Nanofluids are obtained by weighing, preparing, stirring, standing and shaking using dichotomy. Based on this, the heat transfer performance analysis model of the nanofluidic heat pipe based on artificial neural network is constructed, which is applied to the analysis of heat transfer performance of nanofluidic heat pipes to achieve accurate analysis. The experimental results show that the proposed algorithm can effectively analyze the heat transfer performance of heat pipes under different concentrations of nanofluids, and the heat transfer performance of heat pipes is best when the volume fraction of nanofluids is 0.15%.

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Influence of inclination angle on heat transfer performance of heat pipe radiator with an array of pulsating condensers

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2021.116847 ◽

2021 ◽

Vol 191 ◽

pp. 116847

Author(s):

Guowei Xiahou ◽

Shun Zhang ◽

Rui Ma ◽

Junjie Zhang ◽

Yecong He

Keyword(s):

Heat Transfer ◽

Heat Pipe ◽

Inclination Angle ◽

Heat Transfer Performance ◽

Transfer Performance

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Heat transfer performance of polytetrafluoroethylene oscillating heat pipe with water, ethanol, and acetone as working fluids

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2018.08.133 ◽

2019 ◽

Vol 131 ◽

pp. 109-120 ◽

Cited By ~ 11

Author(s):

Tingting Hao ◽

Hongbin Ma ◽

Xuehu Ma

Keyword(s):

Heat Transfer ◽

Heat Pipe ◽

Heat Transfer Performance ◽

Transfer Performance ◽

Working Fluids ◽

Oscillating Heat Pipe

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Experimental Study on Heat Pipe Radiator in Cooling Electronic Apparatus

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.197.216 ◽

2012 ◽

Vol 197 ◽

pp. 216-220

Author(s):

Zhong Chao Zhao ◽

Rui Ye ◽

Gen Ming Zhou

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Heat Pipe ◽

Heat Dissipation ◽

Heat Transfer Performance ◽

Electronic Device ◽

Transfer Performance ◽

Air Velocity ◽

Electronic Apparatus ◽

Operational Temperature

To solve the cooling problem in modern electronic device, a kind of heat pipe radiator was designed and manufactured in this paper. The heat transfer performance of heat pipe radiator and its relationship with air velocity were investigated by experimental method. The experimental results show that the heat pipe radiator can meet the temperature requirement of electronic device with the power range from 40W to 160W. To keep the operational temperature of electronic device with power of 160W under 75°C，the air velocity should be keep at 1.7m/s. The heat dissipation performance of heat pipe radiator was enhanced with the air velocity increased from 0.2m/s to 1.7m/s.for the electronic equipment with power of 160W.

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Effect of Sintering Temperature Curve in Wick Manufactured for Loop Heat Pipe with Flat Evaporator

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.595.24 ◽

2014 ◽

Vol 595 ◽

pp. 24-29 ◽

Cited By ~ 3

Author(s):

Shen Chun Wu ◽

Kuei Chi Lo ◽

Jia Ruei Chen ◽

Chen Yu Chung ◽

Weie Jhih Lin ◽

...

Keyword(s):

Heat Transfer ◽

Heat Pipe ◽

Heat Transfer Performance ◽

Sintering Temperature ◽

Temperature Curve ◽

Loop Heat Pipe ◽

Transfer Performance ◽

Total Thermal Resistance ◽

Flat Evaporator ◽

Increasing Temperature

This paper specifically addresses the effect of the sintering temperature curve in manufacturing nickel powder capillary structure (wick) for a loop heat pipe (LHP) with flat evaporator. The sintering temperature curve is composed of three regions: a region of increasing temperature, a region of constant temperature, and a region of decreasing temperature. The most important region is the increasing temperature region, as the rate of temperature increase directly affects the performance of the wick.When the slope of the region of increasing temperature is 0.8 (equivalent to 8 OC/min), the structure of the manufactured wick is complete, with the best heat transfer performance result. Experimental resultsshowed that the optimal heat transfer performance is 160W, the minimal total thermal resistance is approximately 0.43OC/W, and the heat flux is 17W/cm2; the optimal wick manufactured has an effective pore radius of 5.2 μm, a permeability of 5.9×10-13m2, and a porosity of 64%.

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