The Study of Inter Flow Field and Impeller Strength for Thermal Power Unit Absorption Tower Desulphurization Pump

2016 ◽  
Vol 13 (1) ◽  
pp. 239-245
Author(s):  
Zhenjun Gao ◽  
Jianrui Liu ◽  
Chenxu Guo ◽  
Wei Fu ◽  
Xiaoke He
Keyword(s):  
Flow Field ◽  
Power Unit ◽  
Thermal Power

Simulate Design of Direct Air Cooling Exhausted Duct System for 1000MW Super-Critical Thermal Power Unit

2014 ◽  
Vol 535 ◽  
pp. 180-184
Author(s):  
Chun Qing Wang ◽  
Cai Xia Bian ◽  
Di Wang
Keyword(s):  
Pressure Drop ◽  
Flow Field ◽  
Power Unit ◽  
Flow Resistance ◽  
Thermal Power ◽  
Flow Distribution ◽  
Cooling Power ◽  
Air Cooling ◽  
Exhaust Pipe ◽  
Balanced Flow

Balancing flow distribution and decreasing the pressure drop in each vapor distributing pipe are the importance of the study of exhaust pipe of direct air cooling power unit.In order to balance flow distribution and decreasing the pressure drop in each vapor distributing pipe,and simulate the flow field when add different chamfer on the back of exhausted pipe or not ,then using the CFD software called FLUENT,the steam flow field of exhausted pipe for a 1000 MW power unit with direct air cooling is stimulated under typical steam turbine conditions.The result shows that the steam flows through each distribution pipe with balanced flow under the condition of chamfer angle of 30 °and the flow resistance is much lower than before．

Numerical Simulation of Condenser Throat Combining with Low-Pressure Exhaust Hood for 600MW Thermal Power Unit

2012 ◽  
Vol 614-615 ◽  
pp. 77-82
Author(s):  
Jian Li ◽  
Li Zhang ◽  
Si Ping Wang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Velocity Distribution ◽  
Calculation Result ◽  
Thermal Power ◽  
Low Pressure ◽  
Exhaust Hood ◽  
Combined Model ◽  
Real Condition ◽  
Reasonable Result

In order to obtain the more real condition of the flow field at condenser throat the flow field of condenser throat is numerical simulated by the FLUENT commercial software, alone or coupling with the low-pressure exhaust hood. The results show that the flow field of condenser throat is strongly influenced by low-pressure exhaust hood, the frustum’s diffuse-angle, the low-pressure heater and the injection of the exhaust steam from the small turbine. The velocity distribution at the outlet of the throat isn’t uniform. The calculation result of combined model is also different from the single calculation result of condenser throat. Combined numerical simulation obtains more reasonable result.

Optimizing the Allocation of the Relay Setting Related to Power Grid and over Frequency Generator Tripping Scheme

2014 ◽  
Vol 986-987 ◽  
pp. 404-411
Author(s):  
Qi Yang ◽  
Xin Zeng ◽  
Qing Kui Guo ◽  
Yong Yu Yuan ◽  
Jian Jun Sun ◽  
...  
Keyword(s):  
Power System ◽  
Steam Turbine ◽  
Power Unit ◽  
Program Analysis ◽  
Thermal Power ◽  
Protection Device ◽  
Power Network ◽  
Whole Process ◽  
Islanding Operation ◽  
Frequency Generator

Through the summary of typical accident, the problem between the over speed protection device of thermal power unit steam turbine and over frequency generator tripping measure is analyzed in island operation of sending ends of regional grid. The optimizing allocation principle between over frequency generator tripping measure and over speed protection equipment is put forward. By a variety of program analysis and comparison, the optimizing scheme is given. Finally, the typical models of thermal power unit steam turbine over speed protection are established in software. Based on a practical power system as an example, the whole process of islanding is simulated. Checking the coordination with existing over frequency generator tripping measure and the relay setting related to power network in the islanding operation, the validity and practicability of the optimal scheme and principle are analyzed. With the method, the regional grid will remain safe and stable.

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