The use of the two-phase closed thermosyphons (TPCTs) is increasing for many heat transfer applications. In this study, the development of a numerical model is presented with the purpose of determining the transient characteristics of a TPCT. The model includes the heat transfer through the wall, vapour core, liquid pool and the falling condensate film. The complete two-dimensional conservation...

Abstract The paper presents an identification strategy to obtain relations between time delays of a transport model for evaporating liquid film and corresponding flow/liquid properties. To this end, step-response based pilot plant experiments referring the falling evaporator process are conducted. In context, time-delay identified offline by minimizing output error experiment. subsequent valida...

Vacuum concentration is an intermediary step in the dairy powder production and essential process scheme for of sweetened concentrated milk, a product widely popular produced Brazil. As any food product, it subject to research development order improve original recipe propose new derivatives, whether academic or industrial environments. The tests required products may be costly relation supply ...

A liquid falling between horizontal tubes can take the form of droplets, jets, or a continuous sheet mode, depending on the flow rate. The so-called falling-film flow regime is important to heat and mass transfer, and to maintaining wetted-surface conditions in a falling-film tube bundle, and the performance of such tube bundles is important in many air-conditioning systems. In this paper, we r...