December 23, 2024

Pressure calculation method for air condenser

The actual operation process of the air-cooled condenser is very complicated, and it is not only related to time and space. In the course of operation, the parameter change of the working medium is nonlinear, so it is difficult to establish its dynamic mathematical model. Therefore, in the modeling, it is necessary to apply the lumped parameter method to simplify the dynamic process of the condenser.

Simplification follows the main aspects of the retention of the system and ignores the secondary aspects, which makes the model relatively simple in the process of establishment, without having to consider too many variables, as well as ensuring that the characteristics of the system are not affected. In the establishment of an air-cooled condenser model, the following assumptions can be made: both steam and non-condensable gases are considered ideal gases; the temperature of the steam and air mixture corresponds to the saturation temperature at the corresponding pressure; the cooling air volume through the finned tubes is evenly distributed And the temperature changes the same.

The vacuum and steam partial pressure of the air condenser are determined to a certain extent depending on the total condensation of the steam, so it is an important factor; in the calculation of the condenser pressure, the non-condensing gas such as air should be considered for the condenser pressure. Impact.

By calculating the heat transfer and pressure, enthalpy and temperature between the air-cooling cooling units, the algorithm program of the condenser module can be obtained, and the relationship between the input and output variables and the intermediate variables is determined. Based on the platform of the simulation support system, A schematic diagram of the air condenser module can be established.

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