Parametric study on the fan speed and the fin density under frost conditions are conducted as well to figure out the best trade-off in the design of frost tolerant evaporators.
A one-dimensional frost heave model testing was conducted to assess the frost jacking characteristics of several screw piles and a no-helix pile embedded in highly frost-susceptible soil, and the temperature field, jacking displacement and force characteristics were analyzed.
Physiographic modeling of frost occurrence was then conducted comparing multiple regression (MR) and boosted regression trees (BRT).
The impermeability test was carried out by hydrostatic pressure and chloride ion penetration method, while the frost resistance test was conducted by quick freezing method.
In order to find out the influencing factors of frosting on air coolers, the experiments were conducted for air coolers under frosting, and the frost layer thicknesses under various operating conditions were measured with the aid of microphotography.
Then, several levels of frost damage are introduced by different numbers of freeze-thaw cycles (FTCs), and finally, the static tests and fatigue tests are conducted using the frost damaged concrete.
In this study, two experimental cases with two-working-circuit and three-working-circuit outdoor coils were conducted basing on frost evenly accumulated on their surfaces.
To predict frost heave, various researches have been conducted, including evaluation of its theoretical mechanism, derivation of practical estimation equations, and large-scale experiments.
In addition to studies of the basic physical properties of the renders, frost and chemical corrosion resistance tests were conducted.
As study area belongs to non frost region, hence the durability test was conducted by wetting and drying method in accordance with IS 4332-4 [16]/ASTM D559/D559 M-15 [1].
For an air source heat pump (ASHP) unit, reverse cycle defrosting operations are always conducted to solve the undesired frosting problem.
