Comparison of heat transfer in liquid and slush nitrogen by numerical simulation of cooling rates for French straws used for sperm cryopreservation

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Abstract: Slush nitrogen (SN2) is a mixture of solid nitrogen and liquid nitrogen coexisting under an average temperature of -207ºC. In order to investigate whether plunging a French plastic straw (commonly used for spermatozoa cryopreservation) in SN2 may substantially increase cooling rates with r...

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Autores principales: Sansiñena, Marina Julia, Santos, María Victoria, Zaritzky, Noemí, Chirife, Jorge
Formato: Artículo
Lenguaje:Español
Publicado: 2019
Materias:
REFRIGERACION
NITROGENO LIQUIDO
TRANSFERENCIA DE CALOR
SIMULACION
CONSERVACION
ESPERMATOZOIDES
REPRODUCCION ANIMAL
Acceso en línea:https://repositorio.uca.edu.ar/handle/123456789/5456
Aporte de:
Repositorio Institucional de la Universidad Católica Argentina (UCA) de Universidad Católica Argentina
id I33-R139123456789-5456
record_format dspace
institution Universidad Católica Argentina
institution_str I-33
repository_str R-139
collection Repositorio Institucional de la Universidad Católica Argentina (UCA)
language Español
topic REFRIGERACION
NITROGENO LIQUIDO
TRANSFERENCIA DE CALOR
SIMULACION
CONSERVACION
ESPERMATOZOIDES
REPRODUCCION ANIMAL
spellingShingle REFRIGERACION
NITROGENO LIQUIDO
TRANSFERENCIA DE CALOR
SIMULACION
CONSERVACION
ESPERMATOZOIDES
REPRODUCCION ANIMAL
Sansiñena, Marina Julia
Santos, María Victoria
Zaritzky, Noemí
Chirife, Jorge
Comparison of heat transfer in liquid and slush nitrogen by numerical simulation of cooling rates for French straws used for sperm cryopreservation
topic_facet REFRIGERACION
NITROGENO LIQUIDO
TRANSFERENCIA DE CALOR
SIMULACION
CONSERVACION
ESPERMATOZOIDES
REPRODUCCION ANIMAL
description Abstract: Slush nitrogen (SN2) is a mixture of solid nitrogen and liquid nitrogen coexisting under an average temperature of -207ºC. In order to investigate whether plunging a French plastic straw (commonly used for spermatozoa cryopreservation) in SN2 may substantially increase cooling rates with respect to liquid nitrogen (LN2), a numerical simulation of the heat conduction equation with convective boundary condition was used to predict the cooling rates. Calculations performed using heat transfer coefficients in the range of film boiling confirmed the main benefit of plunging a straw in slush over LN2 does not arise from their temperature difference (-207ºC vs. -196ºC) but from an increase in the external heat transfer coefficient. Numerical simulations using high heat transfer (h) coefficients (assumed to prevail in SN2) suggested that plunging in SN2 would increase cooling rates of French straw. This increase of cooling rates was attributed to a less or null film boiling responsible for the low heat transfer coefficients in liquid nitrogen when the straw is placed in the solidliquid mixture or slush. In addition, it was demonstrated that predicted cooling rates of French straws in SN2 tends to level-off for high h values, suggesting heat transfer is dictated by the heat conduction within the liquid filled plastic straw
format Artículo
author Sansiñena, Marina Julia
Santos, María Victoria
Zaritzky, Noemí
Chirife, Jorge
author_facet Sansiñena, Marina Julia
Santos, María Victoria
Zaritzky, Noemí
Chirife, Jorge
author_sort Sansiñena, Marina Julia
title Comparison of heat transfer in liquid and slush nitrogen by numerical simulation of cooling rates for French straws used for sperm cryopreservation
title_short Comparison of heat transfer in liquid and slush nitrogen by numerical simulation of cooling rates for French straws used for sperm cryopreservation
title_full Comparison of heat transfer in liquid and slush nitrogen by numerical simulation of cooling rates for French straws used for sperm cryopreservation
title_fullStr Comparison of heat transfer in liquid and slush nitrogen by numerical simulation of cooling rates for French straws used for sperm cryopreservation
title_full_unstemmed Comparison of heat transfer in liquid and slush nitrogen by numerical simulation of cooling rates for French straws used for sperm cryopreservation
title_sort comparison of heat transfer in liquid and slush nitrogen by numerical simulation of cooling rates for french straws used for sperm cryopreservation
publishDate 2019
url https://repositorio.uca.edu.ar/handle/123456789/5456
work_keys_str_mv AT sansinenamarinajulia comparisonofheattransferinliquidandslushnitrogenbynumericalsimulationofcoolingratesforfrenchstrawsusedforspermcryopreservation
AT santosmariavictoria comparisonofheattransferinliquidandslushnitrogenbynumericalsimulationofcoolingratesforfrenchstrawsusedforspermcryopreservation
AT zaritzkynoemi comparisonofheattransferinliquidandslushnitrogenbynumericalsimulationofcoolingratesforfrenchstrawsusedforspermcryopreservation
AT chirifejorge comparisonofheattransferinliquidandslushnitrogenbynumericalsimulationofcoolingratesforfrenchstrawsusedforspermcryopreservation
bdutipo_str Repositorios
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