The article presents the results of improving methods for diagnosing energy oil “Tp-30” pumping unit NPP equipment coolant circulation system. When studying physicochemical and thermophysical properties this oil, it was found that: indicators “acid number”, “water content”, “content mechanical impurities”, additive “Ionol”, “flash point”, “kinematic viscosity” correspond to established standard...

The trend toward higher speed, higher power density liquid turbomachinery has inevitably increased the potential for fluid/structure interaction problems, and the severity of those problems. Fluid structure interaction phenomena can lead to increased wear and to structure failure. There are many factors affecting hydraulic and dynamic performance of pumping plants. These factors contribute to d...

In a hydroelectric power plant or in a pumping station in order to avoid sudden large increase of pressure due to instantaneous valve closure sometimes a surge tank is installed. The height of surge tank is designed by the highest possible water level during the operation. The theoretical treatment of oscillation in a surge tank is difficult because of the non-linearity of friction term in the ...

H+-pumping ATPases were detected in nicrosomal vesicles of oat (Avena sativa L. var Lang) roots using 114Clmethylamine distribution or quinacrine fluorescent quenching. Methylamine (MeA) accumulation into vesicles and quinacrine quench were specifically dependent on Mg,ATP. Both activities reflected formation of a proton gradient (ApH) (acid inside) as carbonyl cyanide m-chlorophenylhydrazone, ...

A digital, four-channel thermistor flowmeter integrated with time-lapse cameras was developed as an experimental tool for measuring pumping rates in marine sponges, particularly those with small excurrent openings (oscula). Combining flowmeters with time-lapse imagery yielded valuable insights into the contractile behaviour of oscula in Cliona orientalis. Osculum cross-sectional area (OSA) was ...