Fractal Loop Heat Pipe performance testing with a compressed carbon foam wick structure

Silk, Eric A.; Myre, David

doi:10.1016/j.applthermaleng.2013.05.030

Cited by 22 publications

(8 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Eric et al [29] studied heat flux performance for a prototype wick structure fabricated from compressed carbon foam when used with a Loop Heat Pipe (LHP) containing a fractal-based evaporator design. Atzeni et al [30] and the durability factors of concrete [31].…”

Section: Introductionmentioning

confidence: 99%

Porous ceramic materials by pore-forming agent method: An intermingled fractal units analysis and procedure to predict thermal conductivity

Pia

Casnedi

Sanna

2015

Ceramics International

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Porous ceramic materials by pore-forming agent method: An intermingled fractal units analysis and procedure to predict thermal conductivity

Pia

Casnedi

Sanna

2015

Ceramics International

View full text Add to dashboard Cite

“…The method is particularly interesting because the degree of compression, and thereby the pore size and the wick properties can be tailored to best fit the requirement of the application at hand. Recently Silk and Myre [15] used compression to obtain the desired pore size for a carbon wick structure, for loop heat pipes using water as working fluid. Several layers of compressed foam can be sintered together to increase the total capacity of the wick.…”

Section: Introductionmentioning

confidence: 99%

Performance of compressed nickel foam wicks for flat vertical heat pipes

Hansen

Næss

2015

Applied Thermal Engineering

View full text Add to dashboard Cite

The fabrication and performance of wicks for vertical flat heat pipe applications produced by compression of nickel foams has been investigated. The permeabilities and the effective pore radii for the wicks were estimated from rate-of-rise experiments, using the model fluid heptane. The porosities of the wicks were measured using isopropanol. The results, which are new and of vital importance for optimum use of such wicks, show that the permeabilities and the effective pore radii are in the upper range for heat pipe use. The joining pressure required during the sintering of the wicks was determined, and it was discovered that the nickel foams turned hydrophilic during the sintering.

show abstract

“…Standard wick materials used have included fine pore sintered metals such as Nickel [4][5][6]8,9,14,16,20], Titanium [21,22] and Stainless Steel [23,24]. Alternate materials such as Porous Silicon [13], Polystyrene [25], Polyethylene [7,26] and soda lime glass [27, 28,29] have also been used in LHPs as wick structures at a continually increasing rate. For a more complete review of relevant literature the authors recommend Silk and Myre [28,29,30] Wu et al [25] investigated LHP performance when using a polystyrene wick structure with Ammonia as the working fluid.…”

Section: Introductionmentioning

confidence: 99%

“…Alternate materials such as Porous Silicon [13], Polystyrene [25], Polyethylene [7,26] and soda lime glass [27, 28,29] have also been used in LHPs as wick structures at a continually increasing rate. For a more complete review of relevant literature the authors recommend Silk and Myre [28,29,30] Wu et al [25] investigated LHP performance when using a polystyrene wick structure with Ammonia as the working fluid. The wick structure was tailor made (via a salt leaching method) for high porosity and low thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fractal Loop Heat Pipe Performance Comparisons of a Soda Lime Glass and Compressed Carbon Foam Wick

Myre¹,

Silk

2014

52nd Aerospace Sciences Meeting

Self Cite

View full text Add to dashboard Cite

This study compares heat flux performance of a Loop Heat Pipe (LHP) wick structure fabricated from compressed carbon foam with that of a wick structure fabricated from sintered soda lime glass. Each wick was used in an LHP containing a fractal based evaporator. The Fractal Loop Heat Pipe (FLHP) was designed and manufactured by Mikros Manufacturing Inc. The compressed carbon foam wick structure was manufactured by ERG Aerospace Inc., and machined to specifications comparable to that of the initial soda lime glass wick structure. Machining of the compressed foam as well as performance testing was conducted at the United States Naval Academy. Performance testing with the sintered soda lime glass wick structures was conducted at NASA Goddard Space Flight Center. Heat input for both wick structures was supplied via cartridge heaters mounted in a copper block. The copper heater block was placed in contact with the FLHP evaporator which had a circular cross-sectional area of 0.88 cm 2 . Twice distilled, deionized water was used as the working fluid in both sets of experiments. Thermal performance data was obtained for three different Condenser/Subcooler temperatures under degassed conditions. Both wicks demonstrated comparable heat flux performance with a maximum of 76 W/cm 2 observed for the soda lime glass wick and 75 W/cm 2 for the compressed Carbon foam wick. Nomenclature Area= area (cm 2 ) P = pressure (kPa) T = temperature (°C) TC = thermocouple TM = thermistor δ = error ∆ = difference k = thermal conductivity (W/m-K) h fg = enthalpy of vaporization (kJ/kg) q ɺ ′ ′ = heat flux per unit area(W/cm 2 ) q ɺ ′ ′ δ = uncertainty (W/cm 2 ) ܴ" = Thermal resistance (°C/W/cm 2 ) x = thermocouple distance (mm) Subscripts cond,avg = condenser average int = heat flux probe/evaporator interface k = conductivity sat = saturation surf = surface 1 Senior Principle Engineer/Scientist, KDM Systems Inc., AIAA Senior Member 2 Branch Head, Cryogenics and Fluids, Code 552.0, AIAA Member Downloaded by CORNELL UNIVERSITY on July 31, 2015 | http://arc.aiaa.org |

show abstract

Fractal Loop Heat Pipe performance testing with a compressed carbon foam wick structure

Cited by 22 publications

References 24 publications

Porous ceramic materials by pore-forming agent method: An intermingled fractal units analysis and procedure to predict thermal conductivity

Porous ceramic materials by pore-forming agent method: An intermingled fractal units analysis and procedure to predict thermal conductivity

Performance of compressed nickel foam wicks for flat vertical heat pipes

Fractal Loop Heat Pipe Performance Comparisons of a Soda Lime Glass and Compressed Carbon Foam Wick

Contact Info

Product

Resources

About