Optimal oxygen supply is vitally important for the cultivation of aerobically growing cells, as it has a direct influence on cell growth and product formation. A process engineering parameter directly related to volumetric mass transfer coefficient kLa. It influences kLa computing time different interfacial force population balance models in stirred bioreactors that have been evaluated this stu...

A newly acquired polyhydroxyalkanoate (PHA) producing Pseudomonas sp. was characterized based on 16S rRNA gene sequences (1,423 bp) and identified as P. Putida SS9. This strain putida SS9 considered in respect of its potential for achieving maximum production PHA under controlled volumetric oxygen transfer coefficient (kLa) using inexpensive substrate, cheese whey. The significant parameters su...

This study examines experimentally the performance of a horizontal triple concentric tube heat exchanger TCTHE made copper metal using water as cooling fluid and oil-40 hot fluid. Hot enters inner annular in direction at temperature 50, 60 70 oC flow rate 20 l/hr. On other hand, outer reverse (counter current flow) 25 rates 10, 15, 20, 25, 30 35 The is composed three tubes with diameters 34.925...

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This paper presents an expert system for maintenance of one stage compression refrigerating systems. First a steady state model was developed to estimate significant parameters useful for the diagnosis of the functioning state of the plant. The inputs of the model are data coming from sensors installed on the plant. In our study we concluded the necessity of redunduncies to treat efficiently se...

Introduction Previously we proposed construction of a miniaturized metabolic monitor that could be taken aboard the space station to monitor the physiological response of the body in a microgravity environment. The prototype consisted of an on airway non-dispersive infrared (NDIR) CO2 sensor and a luminescencequenching O2 sensor to measure gas concentrations, and differential pressure ports to ...

To learn about cooling of gas quenched batches, this paper reports on numerical predictions of local and average convective heat transfer coefficients, and overall pressure drops, on batches of five axially aligned, constant temperature, short cylindrical disks 25 cm diameter, 5 cm thickness with and without a concentric hole, with interdisk spacings of 5–20 cm, in axial turbulent flows of 20 b...