Theoretical prediction of the effect of heat transfer parameters on cooling rates of liquidfilled plastic straws used for cryopreservation of spermatozoa
Abstract: Heat transfer plays a key role in cryopreservation of liquid semen in plastic straws. The effect of several parameters on the cooling rate of a liquid-filled polypropylene straw when plunged into liquid nitrogen was investigated using a theoretical model. The geometry of the straw conta...
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| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
CryoLetters
2024
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| Materias: | |
| Acceso en línea: | https://repositorio.uca.edu.ar/handle/123456789/18334 |
| Aporte de: |
| Sumario: | Abstract: Heat transfer plays a key role in cryopreservation of liquid semen in plastic straws. The
effect of several parameters on the cooling rate of a liquid-filled polypropylene straw
when plunged into liquid nitrogen was investigated using a theoretical model. The
geometry of the straw containing the liquid was assimilated as two concentric finite
cylinders of different materials: the fluid and the straw; the unsteady-state heat
conduction equation for concentric cylinders was numerically solved. Parameters
studied include external (convection) heat transfer coefficient (h), the thermal properties
of straw manufacturing material and wall thickness. It was concluded that the single
most important parameter affecting the cooling rate of a liquid column contained in a
straw is the external heat transfer coefficient in LN2. Consequently, in order to attain
maximum cooling rates, conditions have to be designed to obtain the highest possible
heat transfer coefficient when the plastic straw is plunged in liquid nitrogen. |
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