Mini Channel Evaporators using R134a in the Design for Vaccine Transport Boxes

Elmer Dollera; Joel Calunsag; Ian Gabriel Pagdanganan; Archie Waminal; Godofredo Dollera Jr.

doi:10.36948/ijfmr.2024.v06i05.27313

Mini Channel Evaporators using R134a in the Design for Vaccine Transport Boxes

Author(s)	Elmer Dollera, Joel Calunsag, Ian Gabriel Pagdanganan, Archie Waminal, Godofredo Dollera Jr.
Country	Philippines
Abstract	Portable applications of the refrigeration system have become a major trend recently. Such applications would include the portable medicine storage kits. These kits are useful for the proper storage of certain temperature-sensitive medicines and vaccines that require low temperatures if they are to be stored and transported to far-flung remote areas. This trend can only be achieved through the miniaturization of the refrigeration system. The main objective of this study is to design, fabricate, and evaluate the performance characteristics of the mini-channel copper block evaporator. Three 10.6 cm x 6.0 cm copper block evaporator with channel hydraulic diameters of 3.0 mm, 2.5 mm, and 2.0 mm were designed, fabricated, tested, and evaluated. All of the units were connected in a vapor compression refrigeration cycle, and utilized refrigerant R134a as its cooling medium. Forced draft air was also introduced to the evaporators through a wind tunnel or ducting system, to establish heat transfer from the ambient air to the refrigerant R134a. Thirty (30) trials in a thirty (30) seconds interval were conducted per mini channel evaporator. The flow rate of the refrigerant R134a was set to pre-determined values. The data showed that the 3.0 mm copper block evaporator produced the lowest temperature, as well as the lowest pressure drop, since it has the largest channel cross sectional area resulting to a lower thermal conductivity of the copper block evaporator and an increase of the residency time of the refrigerant flowing through the mini channel copper block evaporator.
Keywords	Heat exchanger, Heat transfer coefficient, Vaccine storage kit, Mini channel evaporator, Tetraflouroethane refrigerant, Wind tunnel.
Field	Engineering
Published In	Volume 6, Issue 5, September-October 2024
Published On	2024-09-12
Cite This	Mini Channel Evaporators using R134a in the Design for Vaccine Transport Boxes - Elmer Dollera, Joel Calunsag, Ian Gabriel Pagdanganan, Archie Waminal, Godofredo Dollera Jr. - IJFMR Volume 6, Issue 5, September-October 2024. DOI 10.36948/ijfmr.2024.v06i05.27313
DOI	https://doi.org/10.36948/ijfmr.2024.v06i05.27313
Short DOI	https://doi.org/gwfgh2

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Mini Channel Evaporators using R134a in the Design for Vaccine Transport Boxes

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