The Experts below are selected from a list of 84 Experts worldwide ranked by ideXlab platform
H U Zefeng - One of the best experts on this subject based on the ideXlab platform.
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design of 100mw super pressure double Extraction Condensing Turbine
Thermal Turbine, 2008Co-Authors: H U ZefengAbstract:This report gives a brief introduction to the 100MW super-pressure double-Extraction Condensing steam Turbine which has been developed by our plant recently,and presents a detailed design of HIP,LP section structure and the improved measures for this unit.Through design optimization,it can ensure to reach the advanced level both at home and abroad,with good effectiveness,stability,safety and long-term operation.
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design and development of high pressure 100mw series Extraction Condensing Turbine for cogeneration
Thermal Turbine, 2005Co-Authors: H U ZefengAbstract:This paper makes presentation of the high-pressure 100MW series Extraction Condensing Turbine, analyzes its design features and probes into its design concept and method. Concept of modular design is put forward in order to ensure optimum economy of the Turbine and shorten its design and production preparation cycle.
Lin Fu - One of the best experts on this subject based on the ideXlab platform.
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Combined heating operation optimization of the novel cogeneration system with multi Turbine units
Energy Conversion and Management, 2018Co-Authors: Wentao Li, Yan Li, Xiaofeng Tian, Yifeng Ma, Lin FuAbstract:Abstract At present, large Extraction Condensing Turbine units are generally adopted for combined heating in the cogeneration plants of northern China. A large amount of condensed waste heat of the exhaust steam releasing to the environment leads to a great heat loss of the cold end system. The novel cogeneration system significantly improves energy efficiency of the plant by efficiently recovering the condensed waste heat of multi Turbine units. For the Turbine units with complete recovery of the condensed waste heat, the corresponding cooling towers are closed during the freezing period. With the reduction of the heat load, the surplus condensed waste heat should be discharged by the cooling towers. However, the outdoor wet-bulb temperature is very low during the severe cold period, which results in a surplus of the cooling capacity of the cooling towers. When releasing a small amount of the condensed waste heat, the cooling towers may confront with the frozen risk. A new type of connecting and switching method for the cold end system of the multi Turbine units is proposed to avoid the frozen risk. On this basis, with the method of equivalent electricity of heating, an optimized combined heating operation strategy is proposed for the multi Turbine units under full operating conditions. The case study takes 4 × 300 MW Turbine units as an example, the heat load regulation process is simulated according to the optimized strategy and the discussions are made on the seven regulation stages. Furthermore, the heating performance of the absorption heat pumps and the variation and distribution regularities of the energy consumptions during the heating period are analyzed in detail. Case study results show that, the heating coefficient of performance of the absorption heat pumps is obviously improved after the steam-water heat exchanger withdraws from heating. Compared with the traditional cogeneration heating system, the novel cogeneration system reduces heating energy consumption by 47.7% under the premise of avoiding the frozen risk of the cooling towers during the winter.
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Exergoeconomic Analysis of New High-Temperature District Heating System Based on Absorption Heat Pump Technology in Combined Heat and Power
Volume 5: Energy Systems Analysis Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change Parts A and B, 2010Co-Authors: Lin Fu, Shigang ZhangAbstract:Space heating area of district heating system of combined heat and power (CHP) accounts for approximately one third of total space heating area in Chinese northern cities. In the Extraction Condensing Turbine combined heat and power system based on district heating network, there are a large number of low-grade waste heat in the condenser, and exergy loss in the steam-water heat exchanger and water-water heat exchanger. Based on absorption heat pump technology, a new high-temperature district heating technology (DHSAHP) was presented to improve the current district heating system of CHP. Absorption heat pumps are used to recycle low-temperature waste heat in condenser. Absorption heat pump type heat exchanger is used to reduce temperature of return water in primary heat network, and decrease irreversible loss. Where, DHSAHP was analyzed by thermodynamics and economics method, and evaluated by exergetic efficiency, exergetic output cost, exergetic cost difference and exergoeconomic factor. Compared with current district heating system of CHP, DHSAHP can decrease about 31.3% steam consumption, increase about 75% transmission and distribution capacity of the primary heating network. The evaluation results show that the exergetic efficiency of new district heating system of CHP based on the absorption cycle technology is higher 10.41% than that of current district heating system of CHP, whereas its exergetic cost is lower 36.6¥/GJ than that of the conventional district heating system. With the increase of annual heating time, economy efficiency of new district heating system of CHP becomes better. The DHSAHP has higher energy utilization efficiency and better economic benefits and provides a kind of better technological method to solve the main problems of cuurent district heating with CHP in China.Copyright © 2010 by ASME
Yan Li - One of the best experts on this subject based on the ideXlab platform.
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Configuration optimization of the novel cogeneration heating system with multi Turbine units
Energy Conversion and Management, 2020Co-Authors: Wentao Li, Yan LiAbstract:Abstract At present, the 300 MW Extraction Condensing Turbine units are still the dominant heat sources of cogeneration heating in China. With a rapid increment of heating scale, combined heating with multi Turbine units has applied extensively in cogeneration plants. The novel cogeneration heating system can achieve efficient utilization of the condensed waste heat (CWH) of cogeneration plants with multi Turbine units, through organically combining the technical elements, such as improving the backpressure of Turbine units, using the absorption heat pumps (AHPs), and lowering the return water temperature of heating network. This article takes the 300 MW water-cooling Turbine units as analysis objects, adopts the method of the equivalent electricity of heating for energy consumption evaluation, and aims at minimizing the heating energy consumption of the system. Considering the influence on system economy is dominated by the heating energy consumption, the optimization of system configuration is guided by the heating energy consumption analysis. The elaborate and intensive analysis focuses on the optimum system configuration under different numbers of Turbine units and different return water temperature. According to the application environment, the system configuration is discussed on the flexible high-backpressure heating mode (FHBM) and the restricted high-backpressure heating mode (RHBM). Through analyzing the variation regularities of the optimum crucial parameters under different conditions, it reveals the internal causes of energy consumption change of the heating system. On this basis, from the perspective of system design, this article summarizes the applicability of the novel high backpressure heating system (NHBS) and the novel absorption heat pump heating system (NAHPS). Furthermore, it refines the configuration optimization principles for the novel cogeneration heating system with multi Turbine units. The conclusions are expected to indicate the optimization directions of system design.
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Combined heating operation optimization of the novel cogeneration system with multi Turbine units
Energy Conversion and Management, 2018Co-Authors: Wentao Li, Yan Li, Xiaofeng Tian, Yifeng Ma, Lin FuAbstract:Abstract At present, large Extraction Condensing Turbine units are generally adopted for combined heating in the cogeneration plants of northern China. A large amount of condensed waste heat of the exhaust steam releasing to the environment leads to a great heat loss of the cold end system. The novel cogeneration system significantly improves energy efficiency of the plant by efficiently recovering the condensed waste heat of multi Turbine units. For the Turbine units with complete recovery of the condensed waste heat, the corresponding cooling towers are closed during the freezing period. With the reduction of the heat load, the surplus condensed waste heat should be discharged by the cooling towers. However, the outdoor wet-bulb temperature is very low during the severe cold period, which results in a surplus of the cooling capacity of the cooling towers. When releasing a small amount of the condensed waste heat, the cooling towers may confront with the frozen risk. A new type of connecting and switching method for the cold end system of the multi Turbine units is proposed to avoid the frozen risk. On this basis, with the method of equivalent electricity of heating, an optimized combined heating operation strategy is proposed for the multi Turbine units under full operating conditions. The case study takes 4 × 300 MW Turbine units as an example, the heat load regulation process is simulated according to the optimized strategy and the discussions are made on the seven regulation stages. Furthermore, the heating performance of the absorption heat pumps and the variation and distribution regularities of the energy consumptions during the heating period are analyzed in detail. Case study results show that, the heating coefficient of performance of the absorption heat pumps is obviously improved after the steam-water heat exchanger withdraws from heating. Compared with the traditional cogeneration heating system, the novel cogeneration system reduces heating energy consumption by 47.7% under the premise of avoiding the frozen risk of the cooling towers during the winter.
Wentao Li - One of the best experts on this subject based on the ideXlab platform.
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Configuration optimization of the novel cogeneration heating system with multi Turbine units
Energy Conversion and Management, 2020Co-Authors: Wentao Li, Yan LiAbstract:Abstract At present, the 300 MW Extraction Condensing Turbine units are still the dominant heat sources of cogeneration heating in China. With a rapid increment of heating scale, combined heating with multi Turbine units has applied extensively in cogeneration plants. The novel cogeneration heating system can achieve efficient utilization of the condensed waste heat (CWH) of cogeneration plants with multi Turbine units, through organically combining the technical elements, such as improving the backpressure of Turbine units, using the absorption heat pumps (AHPs), and lowering the return water temperature of heating network. This article takes the 300 MW water-cooling Turbine units as analysis objects, adopts the method of the equivalent electricity of heating for energy consumption evaluation, and aims at minimizing the heating energy consumption of the system. Considering the influence on system economy is dominated by the heating energy consumption, the optimization of system configuration is guided by the heating energy consumption analysis. The elaborate and intensive analysis focuses on the optimum system configuration under different numbers of Turbine units and different return water temperature. According to the application environment, the system configuration is discussed on the flexible high-backpressure heating mode (FHBM) and the restricted high-backpressure heating mode (RHBM). Through analyzing the variation regularities of the optimum crucial parameters under different conditions, it reveals the internal causes of energy consumption change of the heating system. On this basis, from the perspective of system design, this article summarizes the applicability of the novel high backpressure heating system (NHBS) and the novel absorption heat pump heating system (NAHPS). Furthermore, it refines the configuration optimization principles for the novel cogeneration heating system with multi Turbine units. The conclusions are expected to indicate the optimization directions of system design.
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Combined heating operation optimization of the novel cogeneration system with multi Turbine units
Energy Conversion and Management, 2018Co-Authors: Wentao Li, Yan Li, Xiaofeng Tian, Yifeng Ma, Lin FuAbstract:Abstract At present, large Extraction Condensing Turbine units are generally adopted for combined heating in the cogeneration plants of northern China. A large amount of condensed waste heat of the exhaust steam releasing to the environment leads to a great heat loss of the cold end system. The novel cogeneration system significantly improves energy efficiency of the plant by efficiently recovering the condensed waste heat of multi Turbine units. For the Turbine units with complete recovery of the condensed waste heat, the corresponding cooling towers are closed during the freezing period. With the reduction of the heat load, the surplus condensed waste heat should be discharged by the cooling towers. However, the outdoor wet-bulb temperature is very low during the severe cold period, which results in a surplus of the cooling capacity of the cooling towers. When releasing a small amount of the condensed waste heat, the cooling towers may confront with the frozen risk. A new type of connecting and switching method for the cold end system of the multi Turbine units is proposed to avoid the frozen risk. On this basis, with the method of equivalent electricity of heating, an optimized combined heating operation strategy is proposed for the multi Turbine units under full operating conditions. The case study takes 4 × 300 MW Turbine units as an example, the heat load regulation process is simulated according to the optimized strategy and the discussions are made on the seven regulation stages. Furthermore, the heating performance of the absorption heat pumps and the variation and distribution regularities of the energy consumptions during the heating period are analyzed in detail. Case study results show that, the heating coefficient of performance of the absorption heat pumps is obviously improved after the steam-water heat exchanger withdraws from heating. Compared with the traditional cogeneration heating system, the novel cogeneration system reduces heating energy consumption by 47.7% under the premise of avoiding the frozen risk of the cooling towers during the winter.
Osman A. Hamed - One of the best experts on this subject based on the ideXlab platform.
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Lessons learnt from the operational performance of SWCC MSF desalination plants
Desalination and Water Treatment, 2010Co-Authors: Osman A. HamedAbstract:Around 88% of water production by the Saline Water Conversion Corporation (SWCC) is provided by large MSF desalination plants which operate as power/water cogeneration plants. Despite the fact that the majority of SWCC MSF plants have been operating for more than two decades, their availability and water production as well as energy effi ciency are still maintained within—or even sometimes higher—than the original design values. This is attributed to SWCC strict requirements of operation and maintenance which resulted in extending the life of the plants to more than thirty years. In this paper, the energy efficiency of SWCC existing MSF desalination plants will be assessed. SWCC successful economic implementation of scale control techniques and the use of appropriate corrosion resistant materials will be highlighted. Benefi ts obtained from operating SWCC MSF desalination plants within the context of dual purpose plants employing either back pressure or Extraction Condensing Turbine for the simultaneous p...
