Heat exchanger modeling method used for dynamic simulation system and heat exchanger modeling device thereof
A technology of dynamic simulation and modeling method, which is applied in general control systems, control/regulation systems, instruments, etc., and can solve problems such as calculation delays and low precision
Active Publication Date: 2017-08-22
杭州百子尖科技股份有限公司
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[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a heat exchanger modeling method and device for a dynamic simulation system, which can solve the problems of calculation delay or low precision in the calculation of parameters of the existing model
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[0058] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0059] The heat exchanger is used to exchange heat between the hot fluid flowing through the heat exchanger and the cold fluid flowing through the heat exchanger. One fluid flows from the inlet pipe through the tube bundle and then flows out from the outlet pipe, and the other fluid flows from the shell. The inlet pipe flows in, flows through the gap between the shell and the tube bundle, and flows out from the outlet pipe of the shell. The hot fluid releases heat after passing through the heat exchanger, and the cold fluid absorbs heat after passing through the heat exchanger. In the model, a stead...
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The invention discloses a heat exchanger modeling method used for a dynamic simulation system and a heat exchanger modeling device thereof. The method comprises the steps that the initial value of the outlet end temperature value of hot fluid is acquired; the exchange heat of the hot fluid is calculated according to the inlet end enthalpy value of the hot fluid and the outlet end enthalpy value of the hot fluid; the outlet end temperature value of cold fluid is calculated according to the inlet end temperature value of the hot fluid, the outlet end temperature value of the hot fluid, the inlet end temperature value of the cold fluid and the exchange heat of the hot fluid; the exchange heat of the cold fluid is calculated according to the inlet end enthalpy value of the cold fluid and the outlet end enthalpy value of the cold fluid; whether the convergence condition is met is judged; and if the convergence condition is met, the outlet end temperature value of the hot fluid, the outlet end temperature value of the cold fluid, the exchange heat of the hot fluid and the exchange heat of the cold fluid are outputted. The heat and the temperature are calculated by setting the initial value, then the convergence condition is judged by using the exchange heat and the repeated iteration method is adopted so that the calculation speed is fast and the accuracy is high.
Description
technical field [0001] The invention relates to the field of process control, in particular to a heat exchanger modeling method and device for a dynamic simulation system. Background technique [0002] A heat exchanger is a device used to realize heat exchange between cold and hot fluids. One fluid flows through the tube bundle from the inlet tube and then flows out from the outlet tube, and the other fluid flows in from the inlet tube of the shell. It flows through the gap between the shells and flows out from the outlet pipe of the shell, so as to achieve the exchange of heat between the cold and hot fluids. Usually, only the dynamic parameters estimated by experience are used as the basis, and it is difficult to guarantee the optimal performance of the designed or improved heat exchange system. The existing heat exchanger modeling calculation model parameter calculation for dynamic simulation system has the problem of calculation delay or low accuracy. Contents of the i...
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Login to View More IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 魏江葛铭郑小青樊晶晶冯李立
Owner 杭州百子尖科技股份有限公司