flux pump
3.By means of treating the motor and its controller as equality heating matters, this paper analyzes the heat-resistance of the cooling system by way of equal circuits, and puts forward formulas to calculate the temperature of the motor and its controller, analyzes and calculates the fluid-resistance and the energy loss, calculates the flux of the cooling liquid and the needed power of the pump.
4.Establishes the mathematic model of water-water heat pump systems. Taking the COP calculated by the model as an object function, the exchanger area and the cooling water mass flux of the condenser as optimal variables, optimizes the design of water-water heat pump systems with the genetic algorithm and analyses the optimal results.
5.For the direct-flow heating way of solar-energy-heat-pump water heater,the outlet temperature of hot water decreased and the energy efficiency ratio of the system increased with increasing hot water flux,the adjustable range of hot water flux with suitable outlet temperature became wider and the energy efficiency ratio of the system under the condition of same outlet temperature was improved as the evaporation temperature of heat pump and inlet temperature of hot water increased.
7.The whole construction of EGR cooling system is designed. The cooling water of EGR comes from cooling system of engine is pumped by an accessional electric servo pump. The water pump under the control of a microcontroller changes the flux of cooling water so that the temperature of EGR can change automatically.
8.According to the supply system composed by parallel connection water pump, many kinds of operation proposals in a single pump were put forward to provide the greatest possible flow on both sides of the demarcation point in the scope of the flux changes; Identified the system of pumps, electromotor, speed governor imitate method of characteristics curve of the power device and its rotating speed, efficiency, energy consumption calculation under different condition; The analytical methods used for the operational plan for comprehensive evaluation of the economic and safety and optimal results.
9.By testing the hydraulic system of 200MN press,it is shown that the coupling vibration of power fluid and pipeline is the main vibration source of the system.The modeling of pump and pipeline system is established,the transfer matrices of fluid pipelines and related components are given the ways and means for the solution of characteristic impedance are proposed.It can be used for reference in the design of a hydraulic press system of high pressure and large flux.
