Digital twins of process plants provide various opportunities to improve plant operation by in silico studies. A major advantage a simulation-based digital twin is its availability prior the physical plant. Thus, it can be used for design purposes. In this work, dynamic simulation studies novel air separation unit topology are conducted develop reliable control strategy. This includes an integr...

Atmospheric air contains many trace components which are process contaminants or equipment fouling agents in a cryogenic air separation process unit (ASU). Based on the potential problems that they may cause, the trace contaminants are categorized as corrosive, plugging or reactive species. This paper discusses a three step process to manage the trace contaminants as they move through the ASU: ...

In order to study the influence of heat dissipation outdoor unit in groove highrise building. Numerical simulation thermal environment a high-rise building is carried out. The results show that: When mean wind speed 2.7m/s, maximum inlet air temperature under full load condition about 43.3 °C, which 2 °C lower than that no condition. monsoon beneficial unit. hot rises, corner flow induced at si...

Although several air sampling devices for identifying and enumerating airborne microorganisms are commercially available, each poses some limitations. The aim of this study was to evaluate air pollution fungi using three such samplers: SAS Super 100, Microbiological Air Sampler (MAS) 100, and Air IDEAL. Mycological air was taken from the cellars of a 17th-century church in Siemiatycze, Poland, ...

Air permeability plays an important role for applications such as filtration, thermal and acoustic insulation. The study discussed in this paper was conducted in an attempt to investigate air permeability property of various combinations of nonwovens. The PROWHITE air permeability tester was used for the measurement of the air permeability of the samples in accordance with the relevant standard...

â a model is developed for separation of multicomponent gas mixtures in a countercurrent hollow fiber membrane module. while the model’s solution in countercurrent module usually involves in a time consuming iterative procedure, a proper initial guess is proposed for beginning the calculation and a simple procedure is introduced for correcting the guesses, hereby the cpu time is decreased ess...