According to the PumpLinx calculation result and the Cavitation damage index, the cavitation position, level and the cavitation characteristics of the double- suction centrifugal pump has been predicted. For the study of the cavitation flow inside the double- suction centrifugal pump, the professional pump/motor simulation software PumpLinx and its Full Cavitation Model has been employed.

This paper illustrates the flow field numerical analysis of the double- suction centrifugal pump. On an example a flow coefficient calculation procedure of control valves is shown.Ĭavitation simulation and NPSH prediction of a double suction centrifugal pump (paper)ĪUTOMATIC CONTROL SYSTEM OF THE DIFFERENCE BETWEEN DISCHARGE AND SUCTION PRESSURES OF THE HEAT PUMP STATION COMPRESSORĭirectory of Open Access Journals (Sweden)įull Text Available Possibility of realization is shown and the control system of a difference of pressure between an exit and an input of the compressor of the heat pump on carbon dioxide working at variable thermal load, and discharge and suction pressures by means of two control valves connected in series is developed. This electrostatic pump has a flow control resolution of 1 ÂµL min âˆ’1 it could generate a gas flow up to 106 ÂµL min âˆ’1. The pump with higher valve conductance could increase the operating frequency of the pump and affect the pumping characteristics from a pulsating flow to a continuous flow, leading to a higher gas flow rate. The fabricated pumps were tested with various actuation voltages at different frequencies and duty cycles an emphasis was placed on investigating the effect of valve flow conductance on the gas pumping characteristics. Touch-mode capacitance actuation, enabled by a fixed silicon electrode and a metal/polyimide diaphragm, creates the suction and push-out of the ambient gas the gas flow is rectified by the check valves located at the inlet and outlet of the pump. We report on the fabrication and characterization of electrostatic gas micro- pumps integrated with polyimide check valves.

Han, Jeahyeong Yeom, Junghoon Mensing, Glennys Flachsbart, Bruce Shannon, Mark A International Nuclear Information System (INIS)

Characteristics of electrostatic gas micro- pump with integrated polyimide passive valves

Plans for hand dredge with check valve