The theoretic analysis and computing result of a typical engineering show that the computation and control of water surface profiles of variable discharge flow in side channel differ with uniform discharge flow.

Becoming rate of water level is the sign of coming water flow variable.

Investigation of variable mass flow in horizontal well with perforation completion coupling reservoir;

The effect of variable mass flow is cons.

For a single phase steady system,considering the pressure drop created by friction and the character of the variable mass flow in the wellbore,a variable mass model with pressure gradient is developed by coupling the percolation in reservoir with the flow in the wellbore.

Analysis of influencing factors of variable flow rate in a heat metering system;

Test and analysis on variable flow rate in a heat metering quarter;

Energy consumption analysis of primary pump and primary-secondary pump systems with variable flow rate;

Energy saving analysis of variable water flow control in air conditioning water systems;

The economic efficiency with frequency control and the practicability of variable water flow operation for the primary pump system in Lithium-bromide refrigeration system are analyse

Analyses and confirms the practicability of variable water flow operation for the primary pump system, and illustrates its obvious energy saving effects.