Experimental and numerical study of insulation packages containing dry ice pellets

Purandare, Abhishek; Lohuizen, S.W. van; Spijkers, R.M.A.; Vanapalli, Srinivas

doi:10.1016/j.applthermaleng.2020.116486

Cited by 13 publications

(6 citation statements)

References 7 publications

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“…For all box types, the holding times with dry ice are several days, whereby it is lowest for va‐Q‐proof 23 with ≥116 h. Some of the drawbacks of dry ice are linked to the evaporation of the material and its associated single use. Additionally, it has to escape from the box in the gas phase due to the high increase in volume linked to the sublimation (additional information on the sublimation of dry ice in insulation packages can be found in Pundare et al 17 ). This leads to issues if the transport box is stored in enclosed spaces such as airplanes.…”

Section: Resultsmentioning

confidence: 99%

Development of a phase change material for vaccine transport without dry ice

Schmit,

Pöllinger,

Rathgeber

et al. 2024

Energy Storage

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Certain vaccines that have been developed against COVID‐19 require a storage temperature between around −60 and −70°C. It is challenging for logistics to assure these temperature limits. However, the use of dry ice has to be viewed critically for safety and environmental reasons. Additionally, its use is heavily regulated in air cargo. To preserve the cooling chain during transport and to increase the energy efficiency, special transport containers with an incorporated phase‐change material (PCM) can be used. In the first step, PCM candidates were investigated via differential scanning calorimetry (DSC) and in an ultra‐low freezer with a minimal temperature of −85°C. None of the candidates crystallised reliably without nucleating agents. After the initial tests, the eutectic LiBr·5H2O + H2O with a suitable nucleating agent was identified as favourite PCM. Thermal cycling stability tests showed that this PCM crystallises reliably above −80°C and possesses a melting plateau at −67°C. Further tests in vacuum‐insulated transport boxes of the company va‐Q‐tec show that, depending on the box type, the internal temperature stays below −60°C for over 48 h.

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Section: Resultsmentioning

confidence: 99%

Development of a phase change material for vaccine transport without dry ice

Schmit,

Pöllinger,

Rathgeber

et al. 2024

Energy Storage

View full text Add to dashboard Cite

show abstract

“…A quasi-steady numerical model based on heat conduction and radiation is developed using a comercial software package COMSOL 5.4. Further details on modelling and experimental results can be found in journal article [3].…”

Section: Resultsmentioning

confidence: 99%

Experimental and Numerical Investigation of the Effects of Different Heat Transfer Modes on the Sublimation of Dry Ice in an Insulation Box

Purandare

Vanapalli

2021

Advances in Heat Transfer and Thermal Engineering

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“…The thermal conductivity of the insulation material λ i is an order of magnitude lower than the PCM λ PCM . In our analysis, the thermal conductivity of insulation material and PCM used are 0.012 W/m/K [14] and 0.560 W/m/K [13], respectively.…”

Section: Model Formulationmentioning

confidence: 99%

“…It is important to note that in a practical application of a PCM box, the outer surface of the insulation box is subjected to natural convective heat transfer to the ambient. However, a heat flux boundary condition on the outer surface can be replaced by a constant temperature boundary condition for sufficiently high Biot number of insulation box as shown by Purandare et al [13]. A typical insulation box used in such applications has a Biot number of ≈10 or greater indicating that resistance inside insulation is greater than that at the surface.…”

Section: Model Formulationmentioning

confidence: 99%