Studies on the processing of nickel base porous wicks for capillary pumped loop for thermal management of spacecrafts

Mishra, Deepak; Saravanan, T.; Khanra, G.P.; Girikumar, S.; Sreekumar, K.; Sinha, P. P.

doi:10.1016/j.apt.2010.07.011

Cited by 26 publications

(8 citation statements)

References 8 publications

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“…Mono-porous wick Mishra et al [20] Fabricated wicks with high porosity using carbonyl nickel powder. Optimisation was achieved using a cylindrical wick (length to diameter ratio of 10) with porosity value of 64%, average pore size of 5 μm and a permeability of 1 Â 10 À 13 m 2 Xin et al [21] Fabricated wicks by sintering powder containing nickel to copper ratio of 9:1, at a temperature of 650 1C for 30 min.…”

Section: Literature Descriptionmentioning

confidence: 99%

Heat utilisation technologies: A critical review of heat pipes

Chan

Siqueiros

Ling‐Chin

et al. 2015

Renewable and Sustainable Energy Reviews

150

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Section: Literature Descriptionmentioning

confidence: 99%

Heat utilisation technologies: A critical review of heat pipes

Chan

Siqueiros

Ling‐Chin

et al. 2015

Renewable and Sustainable Energy Reviews

150

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“…There are several excellent materials for wicks, such as nickel, titanium, polymeric, ceramic, copper and stainless steel, while those made of carbonyl nickel powder possess the highest purity, controllable porosity and pore size, appropriate mechanical properties, moderate thermal conductivity, and compatibility with various working fluids. Hence, carbonyl nickel powder is widely used to fabricate high-performance wicks [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…To fabricate high permeability wicks with carbonyl nickel powder, pore forming agents and loose sintering processes are usually adopted, and a comparatively high sintering temperature, which is normally higher than 550

, is required to obtain enough strength needed in the assembly and operation of LHP in particular [ 8 , 9 , 10 , 11 ]. Qu et al [ 12 ] investigated the effects of sintering temperature and sintering holding time on the thermal performance of bi-porous nickel wicks in LHPs.…”

Section: Introductionmentioning

confidence: 99%

“…Their results show that the porosity and permeability of wicks continuously decrease with increasing sintering temperature from 650

to 800

, and with prolonging sintering holding time from 30 min to 60 min. Mishra et al [ 8 ] developed nickel wicks using the tap-sintering technique and investigated the effects of sintering temperature on the porosity, permeability and mechanical strength of wicks; their results show that the porosity and permeability of wicks decline as sintering temperature increases from 550

to 775

.…”

Section: Introductionmentioning

confidence: 99%

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The Pore Microstructure Evolution and Porous Properties of Large Capillary Pressure Wicks Sintered with Carbonyl Nickel Powder

Zheng

Wang

et al. 2022

Materials

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We investigated the effect of different sintering temperatures ranging from 200 °C to 600 °C on the porous properties and pore microstructure of large capillary pressure wicks made of carbonyl nickel powder. The evolution model of hydraulic diameter was established and verified by the maximum pore diameter. Hydraulic diameter changed as the roughness of particle surfaces decreased and sintering necks grew large during sintering. In the contact-formation stage and the initial sintering stage (200–500 °C), the decrease in the roughness of particle surfaces played a decisive role, contributing to an increase in hydraulic diameter. In the intermediate sintering stage (600 °C), the growth of sintering necks dominated the process, however the hydraulic diameter was reduced. These results show that the maximum pore diameter first increased and then decreased in the same way as our evolution model. Permeability and capillary performance of the wicks first increased and then declined with increasing sintering temperature. We found the optimal sintering temperature to be 400 °C, at which point the wicks achieved the maximum pore diameter of 1.21 μm, a permeability of 1.77 × 10−14 m2, and their highest capillary performance of 1.46 × 10−8 m.

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“…The sintering process is applied to prepare various types of porous wick, and the thermal properties of heat pipes of different porosity, pore size, and permeability can be investigated. It has been proved that porous wick heat pipes have higher thermal transfer limits [13][14][15][16]. In 2016, Mizuta et al [17] developed a flat vapor chamber with a fine mesh wick of 50 mm × 50 mm × 2 mm and found that this vapor chamber delivered a small thermal resistance.…”

Section: Introductionmentioning

confidence: 99%

Thermal Transfer Characteristics of Flat Plate Micro Heat Pipe with Copper Spiral Woven Mesh and a Copper Foam Composite Wick

et al. 2021

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The thermal efficiency limitation of the Flat-plate Micro Heat Pipe (FMHP) is a major challenge in the development of the FMHP, where the effect of wick structure and wettability on its thermal performance is studied to improve the thermal efficiency of the FMHP. In this work, a copper spiral woven mesh and copper foam Composite Wick FMHP (CW-FMHP) is designed based on the conventional Copper Foam Wick FMHP (CFW-FMHP), and its thermal performance is analyzed regarding the wick structure and internal gas–liquid two-phase flow characteristics. An oxidized copper spiral woven mesh and copper foam Composite Wick FMHP (OCW-FMHP) has been further developed through the modification of composite wick wettability. The performance tests are carried out with the thermal transfer characteristics of CW-FMHP, OCW-FMHP, and CFW-FMHP under different filling rates and different thermal powers. The experimental results show that the thermal transfer performance of CW-FMHP reaches the optimal under a liquid filling rate of 150%, where the maximum thermal power is 15.7 W, 35.3% higher than that of the CFW-FMHP under the same filling rate. Moreover, the dynamic response characteristics of the CW-FMHP are significantly improved. The thermal resistance of the CW-FMHP is 0.48 ∘C/W under the filling rate of 150% at the thermal power of 10 W with a reduction of 9.4% compared to the CFW-FMHP under the same condition. Furthermore, the optimal filling rate for OCW-FMHP is lower compared with the CW-FMHP. The maximum thermal power of OCW-FMHP increases to 17.8 W while the thermal resistance reduces to 0.34 ∘C/W under the liquid filling rate of 140%. This implies that the composite wick structure designed in this work can improve the thermal transfer performance of the FMHP, and the composite wick with wettability modification is more effective regarding both thermal resistance and maximum thermal power.

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Studies on the processing of nickel base porous wicks for capillary pumped loop for thermal management of spacecrafts

Cited by 26 publications

References 8 publications

Heat utilisation technologies: A critical review of heat pipes

Heat utilisation technologies: A critical review of heat pipes

The Pore Microstructure Evolution and Porous Properties of Large Capillary Pressure Wicks Sintered with Carbonyl Nickel Powder

Thermal Transfer Characteristics of Flat Plate Micro Heat Pipe with Copper Spiral Woven Mesh and a Copper Foam Composite Wick

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