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The heat exchanger and air-conditioning space in the central air-conditioning system are modeled in mathematic. Based on the models, we propose a cascade control strategy for temperature control of air-conditioning system. The setpoint response controller in the cascade control system is designed in terms of the robust control H2 optimal performance specification. According to the system operation...
With the development of information and computer technology, it is possible to monitor and analyze on-line features of large steam turbine-generator units. The energy consumption rate and the exhaust steam dryness are two important indices. Base on the analyses of those existed calculation methods for turbine varying condition, we give a sequential varying condition calculation that starts with steam...
Now time, the variable working condition calculation of thermodynamic system and the variable load operation of the large capacity power plant are important subject for research in thermodynamic engineering field all the time. When the current operation point of the power plant is far away from the rated mode, it is very important to analyze the thermo-economy of thermodynamic system and offer appropriate...
Nowadays the examination and calculation of changeable behavior of steam turbine are still a technical difficulty which remains to be solved. In this thesis, the concept of stage current type is proposed, and criterion of differentiation of stage current type out of quantitative entropy currents is derived strictly from basic thermodynamic relation, therefore stage current type is found to be a built-in...
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