Research on Cooling Tower Fan Energy Saving Control System Based on PLC and Inverter Technology

2013 ◽  
Vol 281 ◽  
pp. 537-541
Author(s):  
Jian Ping Chen ◽  
Xiao Kuan Shi ◽  
Hai Jun Li
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Energy Savings ◽  
Cooling Tower ◽  
Water System ◽  
Circulating Water ◽  
Production Practice ◽  
Characteristics Analysis ◽  
Circulating Water System ◽  
Energy Saving Control

In order to improve the effective utilization of the cooling tower fan industrial circulating water system, and to achieve the purpose of energy saving, the paper developed a closed loop cooling tower fan is jointly controlled by the PLC and inverter energy-saving control system. With the theoretical energy-saving fan characteristics analysis, PLC is used as a controller. Combined with inverter technology, remote real-time communication is carried out via RS485 bus with the host computer, and centralized monitoring to operating status of many sets of fans is realized. Production Practice has proved that under the premise of ensuring the water temperature standards, the inverter deceleration of the cooling tower fan makes significant energy savings effect.

Algorithm Modelling Research on Heating Energy-Saving Adjustment

2012 ◽  
Vol 512-515 ◽  
pp. 1263-1266
Author(s):  
Wang Sheng Liu ◽  
Shu Hong Jia ◽  
Yan Sun ◽  
Xing Long Liu
Keyword(s):  
Energy Saving ◽  
Water System ◽  
Electricity Consumption ◽  
Circulating Water ◽  
Regulation Method ◽  
Embedded Controller ◽  
Power Frequency ◽  
Atmosphere Temperature ◽  
Circulating Water System ◽  
System Operating

It has resulted in a lot of electic energy waste that the constant flow of circulating water system operating on power frequency oversupplies heat in the heating period.We investigate algorithm modelling of energy-saving adjustment, adjusting methods and development of embedded controller. Furthermore,we sum up the intelligent regulation method integrated multiple parameters.By this method,heating circulating water system would be varies with change of atmosphere temperature and hot load . Thus the purpose of lower electricity consumption is achieved that based on guarantee of heating effect.

Circulating Water Pump Modifications Performed in Conjunction With Cooling Tower Replacement During a 35-Day Outage

2010 ◽  
Author(s):  
Robert M. Morgenstern
Keyword(s):  
Cooling Tower ◽  
Water System ◽  
Cooling Water ◽  
System Capacity ◽  
Unit Load ◽  
Accelerated Corrosion ◽  
Circulating Water ◽  
Design Changes ◽  
Circulating Water System ◽  
Water Pumps

Westar Lawrence Energy Center Unit 5 in Lawrence, Kansas is a 375 mW unit that utilized a closed loop circulating water system with a wooden cooling tower and three horizontal circulating water pumps to provide cooling water to the condenser. The wooden cooling tower experienced rapid degradation over the past five years of operation. Chlorine was added to the water chemistry to reduce attack of the wooden components, but the chlorine levels in the water caused accelerated corrosion of the pump components and base plates. Circulating water system capacity was reduced due to worn pump components and excessive clearances. Unit load was limited by the lack of adequate circulating water capacity. This paper discusses the pump and motor repairs, design changes performed in parallel with demolition of the wooden cooling tower, and replacement with a new fiberglass tower designed to utilize the existing concrete basin. All of the changes were implemented during an outage in April-May 2009.

Energy Saving Analysis and Improvement of Cooling Circulating Water System in M199 Technological Process

2017 ◽  
Author(s):  
Zhixiang Xiong ◽  
Yin Luo
Keyword(s):  
Energy Consumption ◽  
Water Supply ◽  
Energy Saving ◽  
Technological Process ◽  
Water System ◽  
Cooling Water ◽  
Production Costs ◽  
Variable Pressure ◽  
Circulating Water ◽  
Circulating Water System

M199 is a kind of traditional drug fungicide, which is utilized widely in agriculture. The cooling circulating water system of such a production line consumes so much energy as to build cooling water supply model based on reaction vessel heat transfer mechanism and cooling requirement. The problems of the system is caused from improper pump selection, unreasonable condition adjustment methods, unscientific management, and difficulty in energy consumption evaluation and so on. In order to increase operation efficiency of the system and reduce the waste of energy, this paper surveyed the situation of equipment installation and M199 technological process, then compare the existing energy consumption with that under a variable frequency speed regulation to identify the space for energy saving, eventually complete the analysis of assessment of energy consumption in the whole system. Water supply system of variable pressure and flow is utilized under the premise of meeting the requirement of M199 technological process according to the pump affinity laws and by considering the energy-saving in the pump themselves and their systems so as to refurbish the system and realize the reduction of energy and production costs.

Classroom Lighting Energy-Saving Control System Based on Machine Vision Technology

2018 ◽  
pp. 143-149 ◽  
Author(s):  
Ruijie CHENG
Keyword(s):  
Control System ◽  
Machine Vision ◽  
Energy Saving ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Lighting Control ◽  
Lighting Energy ◽  
Neural Network Algorithm ◽  
Energy Saving Control ◽  
Model Algorithm

In order to further improve the energy efficiency of classroom lighting, a classroom lighting energy saving control system based on machine vision technology is proposed. Firstly, according to the characteristics of machine vision design technology, a quantum image storage model algorithm is proposed, and the Back Propagation neural network algorithm is used to analyze the technology, and a multi­feedback model for energy­saving control of classroom lighting is constructed. Finally, the algorithm and lighting model are simulated. The test results show that the design of this paper can achieve the optimization of the classroom lighting control system, different number of signals can comprehensively control the light and dark degree of the classroom lights, reduce the waste of resources of classroom lighting, and achieve the purpose of energy saving and emission reduction. Technology is worth further popularizing in practice.

scholarly journals A scale removal and scale absorption method for circulating water system

2021 ◽  
Vol 676 (1) ◽  
pp. 012099
Author(s):  
Yao Yang ◽  
Xiaona Li ◽  
Xiang Li ◽  
Yuchao Li ◽  
Tianqi Meng ◽  
...  
Keyword(s):  
Water System ◽  
Absorption Method ◽  
Scale Removal ◽  
Circulating Water ◽  
Circulating Water System

Energy consumption optimization for AC drives position control

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Branislav Ftorek ◽  
Milan Saga ◽  
Pavol Orsansky ◽  
Jan Vittek ◽  
Peter Butko
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Energy Savings ◽  
Position Control ◽  
Control Strategies ◽  
Content Type ◽  
Ac Drives ◽  
Energy Demands ◽  
Wide Range ◽  
Energy Consumption Optimization

Purpose The main purpose of this paper is to evaluate the two energy saving position control strategies for AC drives valid for a wide range of boundary conditions including an analysis of their energy expenses. Design/methodology/approach For energy demands analysis, the optimal energy control based on mechanical and electrical losses minimization is compared with the near-optimal one based on symmetrical trapezoidal speed profile. Both control strategies respect prescribed maneuver time and define acceleration profile for preplanned rest-to-rest maneuver. Findings Presented simulations confirm lower total energy expenditures of energy optimal control if compared with near-optimal one, but the differences are only small due to the fact that two energy saving strategies are compared. Research limitations/implications Developed overall control system consisting of energy saving profile generator, pre-compensator and position control system respecting principles of field-oriented control is capable to track precomputed state variables precisely. Practical implications Energy demands of both control strategies are verified and compared to simulations and preliminary experiments. The possibilities of energy savings were confirmed for both control strategies. Originality/value Experimental verification of designed control structure is sufficiently promising and confirmed assumed energy savings.

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