Cryogenic heat pipes in spacecraft applications

Peterson, G. P.; Compagna, Gary L.

doi:10.2514/6.1986-1254

Cited by 8 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results showed that an increase of filling ratio from 60 to 80% lead to increase of the evaporator temperature especially at higher input heat fluxes. Nada et al [106] experimentally investigated a TPCT-flat plate collector (FPC) with different water mass flow rates (0.01-0.06 kg/s), the inlet cooling water temperature and the number of the pipes (8)(9)(10)(11)(12)(13)(14). They found that there is an optimal operating point for the mass flow rate.…”

Section: Tpct: Applicationsmentioning

confidence: 99%

“…A TPCT can be used in much wider thermal and temperature ranges than a wicked HP, since it does not have the large flow resistance or low boiling limit inside the wick, as the condensate liquid in the TPCT is returned to the heated side of the system under the effect of gravity, instead of capillary forces in wicked HPs [8]. However, TPCTs have major limits on the maximum amount of thermal energy that can be transferred due to viscous, sonic, dryout, flooding and entrainment limits [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two-phase closed thermosyphons: A review of studies and solar applications

Jafari

Franco

Filippeschi

et al. 2016

Renewable and Sustainable Energy Reviews

247

View full text Add to dashboard Cite

Section: Tpct: Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-phase closed thermosyphons: A review of studies and solar applications

Jafari

Franco

Filippeschi

et al. 2016

Renewable and Sustainable Energy Reviews

247

View full text Add to dashboard Cite

“…Under the assumptions that the internal flow of the wick adheres to Darcy's flow and that the wick is fully saturated with the working fluid, we can apply the effective thermal conductivity equation to the wick. The effective thermal conductivity, denoted as K e f f , is calculated using Equation (1), where K l represents the thermal conductivity of the working fluid, K w is the thermal conductivity of the wick, and ε signifies the porosity [72][73][74].…”

Section: Effective Thermal Conductivity Modelmentioning

confidence: 99%

Li-Ion Battery Immersed Heat Pipe Cooling Technology for Electric Vehicles

Oh,

Lee,

Han

et al. 2023

Electronics

View full text Add to dashboard Cite

Lithium-ion batteries, crucial in powering Battery Electric Vehicles (BEVs), face critical challenges in maintaining safety and efficiency. The quest for an effective Battery Thermal Management System (BTMS) arises from critical concerns over the safety and efficiency of lithium-ion batteries, particularly in Battery Electric Vehicles (BEVs). This study introduces a pioneering BTMS solution merging a two-phase immersion cooling system with heat pipes. Notably, the integration of NovecTM 649 as the dielectric fluid substantially mitigates thermal runaway-induced fire risks without requiring an additional power source. Comprehensive 1-D modeling, validated against AMESim (Advanced Modeling Environment for Simulation of Engineering Systems) simulations and experiments, investigates diverse design variable impacts on thermal resistance and evaporator temperature. At 10 W, 15 W, and 20 W heat inputs, the BTMS consistently maintained lithium-ion battery temperatures within the optimal range (approximately 27–34 °C). Optimized porosity (60%) and filling ratios (30–40%) minimized thermal resistance to 0.3848–0.4549 °C/W. This innovative system not only enhances safety but also improves energy efficiency by reducing weight, affirming its potential to revolutionize lithium-ion battery performance and address critical challenges in the field.

show abstract

“…It is well known that sodium is a suitable working fluid for temperatures higher than 800 K [14]. Using the alloy which is nickel-based and with 18% tungsten and 9% manganese as the container and sodium as the working fluid we constructed a heatpipe standard blackbody to cover the temperature range from 800 to 1200 K.…”

Section: Working Fluids For Medium Temperature Heatpipesmentioning

confidence: 99%

A medium temperature radiation calibration facility using a new design of heatpipe blackbody as a standard source

Chen¹,

Liu²,

Li³

et al. 2001

Meas. Sci. Technol.

View full text Add to dashboard Cite

A blackbody calibration facility which can cover the medium temperature range from 500 to 1200 K has been established. To cover the range from 500 to 800 K, a new design of heatpipe blackbody source which uses a mixture of caesium, potassium and sodium as the working fluid has been developed. The upper limit of the operating range of this heatpipe is around 1000 K. The temperature uniformity of the blackbody cavity over two thirds of its length from the closed end is better than 0.05% of the operating temperature (in kelvins). For the range from 800 to 1200 K, another heatpipe blackbody whose working fluid is sodium was manufactured. The temperature uniformity of the blackbody cavity in this device is 0.04% of the operating temperature. The calibration facility consists of a large turntable on which the reference and test blackbodies are positioned and a measurement guide on which an accurate radiometer is mounted. The measurement procedure yields an uncertainty of 0.4% (2σ ) in the calibration of industrial blackbodies.

show abstract

Cryogenic heat pipes in spacecraft applications

Cited by 8 publications

References 1 publication

Two-phase closed thermosyphons: A review of studies and solar applications

Two-phase closed thermosyphons: A review of studies and solar applications

Li-Ion Battery Immersed Heat Pipe Cooling Technology for Electric Vehicles

A medium temperature radiation calibration facility using a new design of heatpipe blackbody as a standard source

Contact Info

Product

Resources

About