Online Optimization Method of Cooling Water System Based on the Heat Transfer Model for Cooling Tower

Energy ◽  
2021 ◽  
pp. 120896
Author(s):  
Keyan Ma ◽  
Mingsheng Liu ◽  
Jili Zhang
Keyword(s):  
Heat Transfer ◽  
Cooling Tower ◽  
Water System ◽  
Cooling Water ◽  
Optimization Method ◽  
Heat Transfer Model ◽  
Online Optimization ◽  
Transfer Model ◽  
Cooling Water System

Metallurgical Secondary Cooling of Continuous Casting Based on Neural Network Adaptive System Design of Water Distribution

2014 ◽  
Vol 926-930 ◽  
pp. 802-805
Author(s):  
Jun Li Jia ◽  
Jin Hong Zhang ◽  
Guo Zhen Wang
Keyword(s):  
Heat Transfer ◽  
Continuous Casting ◽  
Water Distribution ◽  
Cooling System ◽  
Control Level ◽  
Cooling Water ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Secondary Cooling ◽  
Water Control

Efficient secondary cooling water control level slab continuous casting process and quality are closely related. Casting solidification heat transfer model is the basis of process control and optimization, heat transfer model based on determining the secondary cooling system is the most widely used method for casting production process can be simulated. However, when considering the many factors affecting the production and input conditions change significantly, real-time and strain of this method is not guaranteed. Therefore, the artificial intelligence optimization algorithms such as genetic algorithms, neural networks, fuzzy controllers, introducing continuous casting secondary cooling water distribution and dynamics of optimal control methods, the rational allocation of caster secondary cooling water and dynamic control is important.

scholarly journals Study on Energy Efficient Operation of Air-Conditioning Cooling Water System

2015 ◽  
Vol 9 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Wang Liang ◽  
Yang Lu-lu ◽  
Tian Ya-bin
Keyword(s):  
Energy Consumption ◽  
Temperature Control ◽  
Cooling Tower ◽  
Operation Mode ◽  
Water System ◽  
Cooling Water ◽  
Outlet Temperature ◽  
Control Logic ◽  
Cooling Water System ◽  
Load Rate

The control logic of frequency adjustment for pump and cooling tower fan has been presented in this paper, based on the operation mode of a chiller with one pump and one cooling tower. Optimum outlet water temperature control of cooing tower has been put forward through analysis and comparison among factors influencing it, based on measured data. A mathematical model of energy consumption has been established under different outdoor wet-bulb temperature and load rate conditions. The optimized controlling strategy has been obtained after the analysis on energy consumption under two different operational strategies with different number of cooling towers in service. In partial load condition, the best operation mode of cooling water system is the optimal water outlet temperature control system, which aims at the lowest comprehensive system energy consumption. Cooling water system can match the best temperature difference and determine the fan frequency according to optimum outlet temperature automatically. Variable frequency control should be applied to fans; meanwhile, routing maintenance and cleaning is also needed for an even distribution of water and effective use of heat exchange area.

The Simulation Analysis on the Heat Transfer Model of Bloom

2013 ◽  
Vol 753-755 ◽  
pp. 872-875
Author(s):  
Ying Ying Zhai ◽  
Ying Li ◽  
Chen Yan ◽  
Yu Shi Ding
Keyword(s):  
Heat Transfer ◽  
Casting Speed ◽  
Simulation Analysis ◽  
Shell Growth ◽  
Cooling Water ◽  
Solidification Process ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Cooling Zone ◽  
Secondary Cooling

A mathematical heat transfer model was built to simulate temperature, shell growth and phase transformations in continuous casting based on the technical conditions of the bloom caster of some steelmaking plant. The simulation result is coincided with the measurement. The effects of the operation parameters including casting speed, bloom size and steel melt superheat on the solidification process were discussed and the means of enhancing the bloom temperature was brought forward. The research results have been applied in the practical manufacture process to compute the best casting speed, to control the flow rate of secondary cooling water and to optimize the spray pattern of secondary cooling zone. The bloom quality and productivity could be improved.

Improving the Performance of Cooling Water Systems Using Exergy Analysis: A Novel Approach

2009 ◽  
Author(s):  
Mohammad Hassan Panjeshahi ◽  
Mona Gharaie ◽  
Lena Ahmadi
Keyword(s):  
Heat Exchanger ◽  
Exergy Analysis ◽  
Cooling Tower ◽  
Water System ◽  
Cooling Water ◽  
Water Systems ◽  
Exergy Destruction ◽  
Heat Exchanger Network ◽  
Cooling Water System ◽  
Circulating Cooling Water

Circulating cooling water systems almost serve all the operations of industrial plants where there is requirement of an external heat sink for heat removal and temperature control. Research on cooling systems focused on the energy analysis of individual components, cooling tower and heat exchanger network. However, the energy concept, alone is insufficient to describe the energy efficiency of the whole system. In this study, the exergy analysis is applied to evaluate the performance of the circulating cooling water system. To achieve this objective, the exergy destruction of the cooling tower and heat exchanger network in terms of different operational conditions are investigated. The results indicated that the exergy destruction in the cooling tower is increased by increasing the cooling tower inlet temperature; whereas the exergy destruction of the heat exchanger network decreases. Therefore, the problem of cooling water system for performance evaluation becomes an optimisation problem to search for the minimum exergetic destruction. Additionally, the second law efficiency of the cooling tower and water network is studied through the exergetic analysis.

scholarly journals Analisa Performa Pada Cooling Tower Jenis Mechanical Draft Crossflow

2021 ◽  
Vol 10 (1) ◽  
pp. 24-28
Author(s):  
Alvera Melkias
Keyword(s):  
Cooling Tower ◽  
Water System ◽  
Cooling Water ◽  
Secondary Cooling ◽  
Cooling Water System

Sistem pendingin pada unit PLTP terdiri dari dua macam sistem sirkulasi yaitu sistem air pendingin utama ( Main Cooling Water System ) yang melayani pendinginan pada kondensor dan sistem air pendingin sekunder ( Secondary Cooling Water System ) yang melayani pendinginan untuk peralatan bantu. Jenis cooling tower yang dipergunakan pada unit PLTP Kamojang adalah mechanical draft crossflow tower. Tujuan penelitian ini yaitu untuk menganalisis menara pendingin di Pembangkit Listrik Tenaga Panas Bumi Kamojang. Untuk mengetahui kinerja Cooling Tower pada saat dioperasikan, analisis kalor yang terevaporasi, kalor pendinginan dari air ke cooling tower serta nilai efektivitas Cooling Tower. Metode analisis yang digunakan adalah membandingkan nilai kalor evaporasi, kalor pendingin serta nilai efektivitas berdasarkan data desain dan data operasi pada sistem. Berdasarkan hasil perhitungan serta analisa yang telah dilakukan maka diperoleh kesimpulan bahwa kalor evaporasi pada data desain yaitu 242,437.76 kW dan kalor pendinginan 242,027.93 kW sedangkan pada data operasi kalor evaporasi sebesar 298,496.06 kW dan kalor pendinginan 298,374.40 kW. Nilai efektivitas pada data desain sebesar 64% sedangkan pada data operasi sebesar 59,37% adanya penurunan sebesar 4,63%.

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