scholarly journals Circulating water cooling system using a turbo-expander at gas thermal power plants

2019 ◽  
Author(s):  
Sergey Osipov ◽  
Alexey Zonov ◽  
Bulat Makhmutov ◽  
Arkadiy Zaryankin
Keyword(s):  
Power Plants ◽  
Cooling System ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Water Cooling ◽  
Circulating Water ◽  
Turbo Expander ◽  
Water Cooling System

scholarly journals THE RESEARCH OF CIRCULATION WATER SUPPLY SYSTEM OF POWER UNIT OF THERMAL POWER PLANT WITH HELLER COOLING TOWER

2020 ◽  
Vol 2020 (2) ◽  
pp. 1-9
Author(s):  
Mykola Bosak ◽  
◽  
Oleksandr Hvozdetskyi ◽  
Bohdan Pitsyshyn ◽  
Serhii Vdovychuk ◽  
...  
Keyword(s):  
Power Plant ◽  
Water Supply ◽  
Power Unit ◽  
Cooling Tower ◽  
Cooling System ◽  
Thermal Power ◽  
Water Cooling ◽  
Pressure Losses ◽  
Circulating Water ◽  
Water Cooling System

Analytical hydraulic researches of the circulating water cooling system of the power unit of a thermal power plant with Heller cooling tower have been performed. Analytical studies were performed on the basis of experimental data obtained during the start-up tests of the circulating water cooling system of the “Hrazdan-5” power unit with a capacity of 300 MW. Studies of the circulating water cooling system were carried out at an electric power of the power unit of 200 - 299 MW, with a thermal load of 320 - 396 Gcal/hr. By circulating pumps (CP), water mixed with condensate is fed to the cooling tower, from where it is returned through the turbine for spraying by nozzles in the turbine steam condenser. An attempt to increase the water supply to the condenser by increasing the size of the nozzles did not give the expected results. The amount of the water supply to the circulating pumping station depends on the pressure loss in the circulating water cooling system. The highest pressure losses are in hydro turbines (HT), which are part of the circulating pumping station. Therefore, by adjusting the load of the hydro turbine, with a decrease in water pressure losses, you can increase the water supply by circulating pumps to the condenser. Experimental data and theoretical dependences were used to calculate the changed hydraulic characteristics of the circulating water cooling system. As a result of reducing the pressure losses in the section of the hydro turbine from 1.04 to 0.15 kgf/cm2, the dictating point for the pressure of circulating pumping station will be the turbine steam condenser. The thermal power plant cooling tower is designed to service two power units. Activation of the peak cooler sectors of the cooling tower gives a reduction of the cooled water temperature by 2-4 °С only with the spraying system.

Study on the Comprehensive Program of Heat Pump Technology Recycling Thermal Power Plants Circulating Water Heat

2013 ◽  
Vol 313-314 ◽  
pp. 759-762
Author(s):  
Yun Feng Ma ◽  
Yan Xiang Liu ◽  
Tao Ji
Keyword(s):  
Heat Pump ◽  
Power Plants ◽  
Waste Heat ◽  
Thermal Power ◽  
Heating System ◽  
Hot Water ◽  
Thermal Power Plants ◽  
Domestic Hot Water ◽  
Circulating Water ◽  
Central Heating

In order to fully recycle power plant’s circulatingwater heat, improve the thermal efficiency and protect the environment, thispaper designs the comprehensive scheme of heat pumptechnology recycling power plant’s circulating water heat, including theboiler mae-up water pre-heating system, the central heating circulatingsystem and the domestic hot water circulating system, which not only run at thesame time but also function independently. Even in non-heating seasons,the waste heat of circulating water can be utilized fully. It is worthmentioning that this paper puts forward to install climate compensationdevice in the central heating system, which can perform intelligent district timesharing control to meet different users’ needs.

scholarly journals Digital Twins of the Water Cooling System in a Power Plant Based on Fuzzy Logic

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6737
Author(s):  
Carlos Antonio Alves de Araujo Junior ◽  
Juan Moises Mauricio Villanueva ◽  
Rodrigo José Silva de Almeida ◽  
Isaac Emmanuel Azevedo de Medeiros
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Cooling System ◽  
Ambient Air ◽  
Fuzzy Rules ◽  
Percentage Error ◽  
Water Cooling ◽  
Twin Model ◽  
Digital Twins ◽  
Water Cooling System

In the search for increased productivity and efficiency in the industrial sector, a new industrial revolution, called Industry 4.0, was promoted. In the electric sector, power plants seek to adapt these new concepts to optimize electric power generation processes, as well as to reduce operating costs and unscheduled downtime intervals. In these plants, PID control strategies are commonly used in water cooling systems, which use fans to perform the thermal exchange between water and the ambient air. However, as the nonlinearities of these systems affect the performance of the drivers, sometimes a greater number of fans than necessary are activated to ensure water temperature control which, consequently, increases energy expenditure. In this work, our objective is to develop digital twins for a water cooling system with auxiliary equipment, in terms of the decision making of the operator, to determine the correct number of fans. This model was developed based on the algorithm of automatic extraction of fuzzy rules, derived from the SCADA of a power plant located in the capital of Paraíba, Brazil. The digital twins can update the fuzzy rules in the case of new events, such as steady-state operation, starting and stopping ramps, and instability. The results from experimental tests using data from 11 h of plant operations demonstrate the robustness of the proposed digital twin model. Furthermore, in all scenarios, the average percentage error was less than 5% and the average absolute temperature error was below 3 °C.

scholarly journals Purification of thermal power plant emissions from carbon dioxide by the liquefaction method as part of a turboexpander unit

2021 ◽  
Vol 2094 (5) ◽  
pp. 052019
Author(s):  
A V Egorov ◽  
Yu F Kaizer ◽  
A V Lysyannikov ◽  
A V Kuznetsov ◽  
Yu N Bezborodov ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Power Plants ◽  
Thermal Power ◽  
Combustion Products ◽  
Combined Cycle ◽  
Energy Costs ◽  
Thermal Power Plants ◽  
Power Plant Emissions ◽  
Turbo Expander ◽  
Plant Emissions

Abstract The purpose of this work is to estimate the energy costs for the utilization of carbon dioxide generated by thermal power plants operating on various types of fuel by the liquefaction method as part of a turbo-expander installation, as well as a general assessment of the efficiency of the TPP during the utilization of carbon dioxide. The energy costs for the liquefaction of carbon dioxide in the turbo-expander unit from the combustion products of thermal power plants running on coal, natural gas and heating oil differ slightly and amount to about 5 MJ/kg of fuel burned. The practical application of purification of combustion products of thermal power plants from carbon dioxide by the liquefaction method as part of a turboexpander installation is possible as part of combined-cycle power plants with a simultaneous reduction in electrical efficiency by more than 10 % to a level of less than 50 %.

Study of the opportunity of using technical water supply systems at Thermal Power Plants in accordance with the climatic conditions of Azerbaijan

2021 ◽  
Vol 65 (04) ◽  
pp. 244-248
Author(s):  
Nərmin Qaroğlan qızı Quliyeva ◽  
Keyword(s):  
Water Supply ◽  
Power Plants ◽  
Cooling System ◽  
Thermal Power ◽  
Climatic Conditions ◽  
Water Supply Systems ◽  
Thermal Power Plants ◽  
Cooling Systems ◽  
Closed Systems ◽  
Supply Systems

Given that the required amount of technical water supply causes environmental problems and is one of the problems of global warming, as well as reducing the amount of water in rivers and water basins, we can achieve a more environmentally efficient cooling system by switching from traditional to closed indoor cooling systems of the thermal power plants. Thus we can use water more efficiently in accordance with climatic conditions. Key words: thermal power plants, closed systems, cooling systems, evaporation, technical water supply, cycle

Analysis Of Thermal Power Plants Cooling System In Climate Changes Regards

2017 ◽  
Author(s):  
Diana Silva Siqueira ◽  
Rogério José Silva ◽  
Genésio Menon ◽  
Renata Vitor Chaves da Silva Guimarães Francisco
Keyword(s):  
Power Plants ◽  
Climate Changes ◽  
Cooling System ◽  
Thermal Power ◽  
Thermal Power Plants

scholarly journals Improving the cooling system of ship equipment

2020 ◽  
Author(s):  
А.В. Фомин ◽  
Е.В. Фомин
Keyword(s):  
Power Plants ◽  
High Efficiency ◽  
Cooling System ◽  
Heat Removal ◽  
Normal Operation ◽  
Water Cooling ◽  
Cooling Systems ◽  
Start Up ◽  
Membrane Type ◽  
Water Cooling System

В статье представлены результаты исследования эффективности работы системы охлаждения корабельного оборудования и предложены конструктивные решения, позволяющие модернизировать данную систему. В настоящее время, для обеспечения нормальной работы корабельного оборудования, применяются системы охлаждения. В корабельных энергетических установках распространены системы водяного охлаждения из-за целого ряда преимуществ. К ним относится и высокая эффективность теплоотвода, и меньшее влияние внешней среды, а также более надежный пуск и возможность использования энергии отводимого тепла для других нужд. Одним из основных элементов в таких системах является расширительный бак гравитационного типа, обеспечивающий правильную циркуляцию дистиллированной воды во внутреннем контуре и расположенный в верхней точке системы. Однако практика испытаний и эксплуатации показала, что есть и серьезный недостаток в таком расположении бака – в случаи его перелива или разрыва может пострадать дорогостоящее оборудование, расположенное ниже. В связи с этим, определены направления по совершенствованию системы водяного охлаждения корабельного оборудования, которые связаны с применением расширительного бака мембранного типа и использования воздухоудаляющих клапанов. The article presents the results of a study of the efficiency of the cooling system of ship equipment and offers design solutions that allow to modernize this system. Currently, to ensure the normal operation of ship's equipment, cooling systems are used. Water cooling systems are common in ship power plants due to a number of advantages. These include high efficiency of heat removal, less influence of the external environment, as well as more reliable start-up and the ability to use the energy of the heat being withdrawn for other needs. One of the main elements in such systems is a gravity-type expansion tank that ensures proper circulation of distilled water in the internal circuit and is located at the top of the system. However, the practice of testing and operation has shown that there is a serious drawback in this arrangement of the tank – in cases of overflow or rupture, expensive equipment located below may suffer. In this regard, the directions for improving the water cooling system of ship equipment, which are associated with the use of an expansion tank of the membrane type and the use of air-removing valves, have been identified.

scholarly journals Development of a herbal cream mixer with a homogenizer-stirrer and circulating water cooling system

2021 ◽  
Vol 1137 (1) ◽  
pp. 012024
Author(s):  
Suntorn Suttibak ◽  
Kamonrat Deesapa ◽  
Chayarnon Saengmanee ◽  
Athika Chuntanapum
Keyword(s):  
Cooling System ◽  
Water Cooling ◽  
Circulating Water ◽  
Water Cooling System
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