Safe and economical use of adiabatic material and tube heating to prevent freezing of water cooled by air flow

2020 
Abstract This paper is concerned with the preventing freezing of water in a closed vertical tube by using an adiabatic material and a tube heating. The 3-D numerical procedure in un-steady state reveals that thick material enhances unexpectedly freezing compared with thin material during the freezing process. An adiabatic material covered on a tube obstructs to prevent freezing compared with a bare tube comparatively in low air flow-inlet velocity. This curious results can not be explained from a mean heat transfer coefficient in steady state. The results obtained will be useful basic information to prevent freezing of water in a tube safely and economically within the present parameters.
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