2022
DOI: 10.1016/j.ijrefrig.2021.12.013
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Vapor compression refrigeration testing on parabolic flights: Part 2 - heat exchanger performance

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Cited by 8 publications
(3 citation statements)
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“… Bortolin et al 69 Collection of experimental results from ESA ENCOM project (parabolic flight) Axially symmetrical curvilinear fin with 15 mm height HFE-7100 Natural convection T sat = 51 °C Liquid film thickness measurements Flow visualizations Maximum local HTC detected at the tip of the fin and at the conjugation area of condensed film and the meniscus at the bottom of the fin. Brendel et al 23 , 24 Experimental (parabolic flights) Fin-and-tube condenser (6.2 mm ID, 16.8 m total coil length) in a vapor compression cycle R134a T sat = 25.6–31.6 °C G = 15.2–35.1 kg m −2 s −1 Flow visualizations Check of the stability of the system Condensation pressure rise by 3% under microgravity compared to normal gravity. Chen et al 4 Review of numerical, analytical and experimental works Flat surfaces, microgrooves, smooth and microfinned channels, round and rectangular minichannels Steam and refrigerants Assessment of the influence of gravity, shear stress, surface tension, and capillary and centrifugal forces on condensation heat transfer Large potential for the use of vapor shear to remove the condensate in space applications.…”
Section: Introductionmentioning
confidence: 99%
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“… Bortolin et al 69 Collection of experimental results from ESA ENCOM project (parabolic flight) Axially symmetrical curvilinear fin with 15 mm height HFE-7100 Natural convection T sat = 51 °C Liquid film thickness measurements Flow visualizations Maximum local HTC detected at the tip of the fin and at the conjugation area of condensed film and the meniscus at the bottom of the fin. Brendel et al 23 , 24 Experimental (parabolic flights) Fin-and-tube condenser (6.2 mm ID, 16.8 m total coil length) in a vapor compression cycle R134a T sat = 25.6–31.6 °C G = 15.2–35.1 kg m −2 s −1 Flow visualizations Check of the stability of the system Condensation pressure rise by 3% under microgravity compared to normal gravity. Chen et al 4 Review of numerical, analytical and experimental works Flat surfaces, microgrooves, smooth and microfinned channels, round and rectangular minichannels Steam and refrigerants Assessment of the influence of gravity, shear stress, surface tension, and capillary and centrifugal forces on condensation heat transfer Large potential for the use of vapor shear to remove the condensate in space applications.…”
Section: Introductionmentioning
confidence: 99%
“…Analysis of pressure signals in terrestrial condensing systems reveals the presence of oscillatory phenomena due to transient flow which can be encountered also in microgravity and hypergravity conditions and may impact the thermal performance of the cooling devices 22 . The stability and the performance of a vapor compression cycle working with R134a under varying gravity accelerations were experimentally investigated by Brendel et al 23 , 24 during parabolic flight campaigns. The onset of microgravity was found to cause a steep increase of the condensation pressure up to 3% due to the reduced liquid removal from the walls and the decreased heat transfer coefficients compared to normal gravity.…”
Section: Introductionmentioning
confidence: 99%
“…The review identified examples of other cold storage technologies used in space, such as Stirling cycle, reversed Brayton cycle and thermoelectrics. Subsequently, in 2022, the same group published experimental results from their own VCC refrigeration tests during parabolic flights [13,14].…”
Section: Introductionmentioning
confidence: 99%