A Control Strategy for Combined Series-Parallel Pumps

Abstract

When a solution is adopted for a pumping irrigation system, to variable or constant wealth, the engineer has to evaluate the different alternatives to decide the most suitable system of pumping. The majority of the companies of the sector, they choose for systems of pump gradation in parallel at constant speed, with what the variable that they control is the wealth. In this paper there is proposed a system of pumping that connects pumps in parallel and pumps in series, working at variable speed, controlled by an algorithm that allows that every bomb should work inside the area of maximum efficiency.

Spatial concentration distribution analysis of cells in electrode-multilayered microchannel by dielectric property measurement

“…where G is conductance, j is imaginary unit, x is angular frequency, and C c is the capacitance of cell suspension, which is calculated by Eq. 3, 32 the dimensions are depicted in Fig. 3 C ¼ e 0 e 0 w h ln 1 þ a b ;…”

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