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Online Monitoring of Temperature and Optimization Study of Cold End System of Direct Air-cooling Uni

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Tutor: ZhangShuFang
School: North China Electric Power University
Course: Thermal Power Engineering
Keywords: direct air-cooling,variable condition,online monitoring,optimum backpressure
CLC: TM621
Type: Master's thesis
Year:  2012
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With the rapidly developing economy and raising standard of living, operation of large scale thermal power plant will face stricter demands. Direct air cold unit power plant developed rapidly in recent years in north China where had more coal but less water. But there are still some problems, such as direct air cold condenser has a large size and a complex system, its running performance closely related with the environment and its working conditions, monitoring of condenser temperature field is difficult, cooling performance of condenser is seriously influenced by environment and optimum running back pressure is difficult to be determined and so on.Now most direct air cold steam turbine set in China did not realize online monitoring of air temperature field of the air cold condenser, so the evaluation of heat exchange effect of air cooling system, the determination of optimum back pressure, the running adjustment of air cooling system and the determination of antifreezing measures during winter had to be done hysteretic and blindly.So what the paper needs to be done is to solve the monitoring problem of inlet and outlet air temperature of the air cooling system. With the monitor of inlet and outlet air temperature and data treatment, we can realize the online monitoring of running situation and optimize the cold end parameters with the handled data, and provide instruction for the running management personnel.
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