Effective Application of Energy Saving Technology for Fluid Transport in Cooling Water Circulation System

Industrial technology cooling water circulation system in the effective application of energy-saving fluid transmission Ren Yongsheng (Shandong Institute of Chemical Technician, Shandong Zaozhuang fluid transport energy efficient technology, can improve the cooling system without changing the system flow and pressure on the premise of cooling water system efficiency, and energy-saving effect is significant, This paper analyzes the problems existing in the traditional cooling water circulation system and the characteristics of the fluid-conveying energy-saving technology, discusses the application methods and energy-saving effects of the fluid-conveying energy-saving technology in the cooling water circulation system.

Table 1. Cooling Water Circulation System Operational Parameters Before and After Application of Energy-Saving Technology for Fluid Transportation Project Fluid Transfer Energy Saving Technology Application Fluid Transfer Energy Saving Technology Application After Operation Mode Run No. 2 and No. 3 Pumps Traditional Cooling Circulating Water System During Actual Work, Status The point deviates from the optimum operating point, the resistance is large, and there is a phenomenon of large energy consumption and low efficiency. Traditional power-saving technologies such as "frequency-reserving power-saving" and "ternary-flow impeller" have large limitations, and the energy-saving effect is not significant, and it is difficult to meet the production requirements of enterprises. The fluid-conveying high-efficiency energy-saving technology is a systematic deviation-optimization optimization technology that can effectively correct the operating point of the system during operation, restore it to the optimal operating point of the system, improve the working efficiency of the equipment, and reduce energy consumption.

1 The problem of high energy consumption and its causes in the cooling water circulation system The improved cooling water circulation system consists of three 110kW cooling water pumps and end cooling equipment. It belongs to the open loop mechanical circulation system. Usually under standard conditions, the cooling water is sent from the cooling pool to the system for heat exchange by the water pump. After the heat exchange, the cooling water is sent back to the cooling tower for cooling. Such recycling is used.

The loss of cooling water is replenished by the water supply system. However, under actual circumstances, the design and construction of the pumping piping of the cooling water circulation system is not ideal or the operating conditions have changed, and the actual operating conditions of the pump will inevitably deviate from the optimum operating conditions, and even a large deviation will occur. The operating efficiency of the pump unit is reduced, and most of the domestic water pump and motor structure design and manufacturing processes are relatively backward, the pump operation efficiency is low, and the operating energy consumption of the entire system is increased.

At the same time, due to the backwardness of the pipe network design, the pipe network has a large resistance to water ineffective in the process of water circulation, resulting in inefficient energy consumption. This is also an important factor in the system's low efficiency and high energy consumption. In addition, the original system often has the situation that the pump model does not match the system device, which makes the pump run in the ultra-flow, low lift area, and the efficiency is very low, resulting in the pump power exceeding the shaft power, and even exceeding the motor's matching power. In order to prevent overcurrents, companies often shut down some of the pumps' outlet valves, which results in wasted energy.

2 fluid delivery energy-saving technology The traditional cooling water circulation system uses energy-saving inverter technology, but in the original system installed on the inverter and the corresponding control system, simply by frequency control, adjust the delivery flow, energy efficiency is not obvious and can not be measured, poor reliability. The energy-saving technology of fluid delivery is different from that of variable-frequency energy-saving technology. It is an efficient energy-saving technology that uses the hydrodynamic characteristics of the pipeline to correct deviations in the circulating water system so that it can operate in accordance with the best conditions. The technical principle is: aiming at the low-efficiency and high-energy-consumption situations common in the operation of cooling water circulation system in chemical companies, so as to make the system operate in accordance with the best conditions, with the goal of reducing energy consumption and improving efficiency, and collecting the various operations of the system. The data, using CFD data simulation technology, establish a professional hydraulic mathematical model and parameter acquisition standards, data analysis, system diagnosis, system optimization of the system to accurately find the best working conditions, the pumping equipment and piping system Matching, and then through the rectification of unfavorable factors, according to the parameters of the best operating conditions customized high-efficiency pump, to replace the original unfavorable working conditions, inefficient operation of the pump, eliminating the increase in the system energy consumption factors, completely solve the circulating water The system's high energy consumption issues maximize energy savings. It can be seen that the water pump used in the fluid-conveying energy-saving technology is tailor-made for the cooling water circulation system, which is more in line with the requirements of the system than the standard pump, and is closer to the optimal operating point of the system. The system piping is designed in combination with the fluid mechanics characteristics and matched with the pump equipment. The pipe network resistance is small and the energy consumption is significantly reduced.

3 Application of fluid-conveying energy-saving technology in cooling water circulation system 3.1 Design of fluid-saving energy-saving technology In the fluid-conveying system, the pump machinery is usually connected to a specific pipeline, and its working status depends on the performance curve and the tube of the pump-type machinery. The characteristic curve of the road.

Therefore, determining the characteristic curve of the system piping is the key to improving the operating efficiency of the circulating water system. Since the system has been actually running, we can collect the pressure and flow data of the pump system, the pipe network, the end heat exchange device, and the cooling tower system through on-line detection of the operating conditions of the system, and use computer simulation to conduct research. Analyze, export the characteristic curve of the system pipeline, then find the best working condition and optimization scheme of the pump equipment according to the mechanical performance curve of the pump.

According to the characteristic curve of the best operating point and system piping, combined with the temperature difference data of each operating point in the system operation, the computational fluid dynamics and ternary flow theory are used to determine the pump unit form and the pump parameters based on the design parameters. Conduct hydraulic design. Then simulate the calculation of the flow field value of the overall pump unit, analyze and optimize the hydraulic loss under different conditions, and finally determine the hydraulic model and the pump unit format that meet the system requirements, and achieve the highest operating efficiency of the pump unit.

3.2 The realization of fluid-conveying energy-saving technology. According to the design of the fluid delivery system, three energy-efficient pumps (WKRL200-55) were tailored to replace the original water pump (250-B01 110), and the pump power was adjusted according to the design calculations, reducing the original 90 kW to 55 kW. Adjust the inlet line. Rearrangement and Adjustment of Cold Table 1 Rear Column Lifting Device Main Technical Specifications Item Rated Lifting Weight (KN) Lifting or Falling Time (S) Landing Angle (.) Lifting Height (mm) Size (mm2) Heavy industry technology and technology information bookmark2 curve obtained from the empirical formula as shown. The simulation results with ADAMS basically consistent.

The empirical formulae (2) and (3) not only have higher accuracy when describing the displacement of the center point of the fence, but also maintain high accuracy when calculating the speed of the center point of the fence. The formula (2) and the first derivative of the time are the speeds that describe the center point of the board in both the horizontal and vertical directions. Empirical formula: -0.126t2-0.0608t+2.101 0 The center point of the board is obtained from equation (4). In the horizontal direction of the speed curve, such as a. Contrast ADAMS simulation results (b), you can find empirical formula and ADAMS simulation results are basically consistent.

The calculated curve pairs are shown as an example. It can be seen that the speed of the center point of the board in the Y direction estimated by the empirical formula is basically consistent with the simulation result.

4 Conclusions The ADAMS software was used to simulate the movement of the rear tailgate lifting mechanism of the vehicle, and the coordinate change rule and speed-time curve of the center point of the tailgate lifting mechanism during the movement were obtained, and the description column was given. The empirical formula of the coordinates of the center point of the board and the law of speed and time provides a convenient method for analyzing the motion of the mechanism and the stability of the lifted goods, and provides a basis for the further optimization of such mechanisms.

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