Пастеризатор як об'єкт керування за каналами нагрівання і охолодження молока

В. О. Мірошник, Т. І. Лендєл

Анотація


PASTEURIZER AS OBJECT OF MANAGEMENT ON CHANNELS OF HEATING AND COOLING MILK

V. Miroshnik, T. Lendiel

Pasteurization - basic operation for processing milk on the farm before being sent to dairy plants. Practice and research found that short-term heating milk to a temperature of 71 - 76 ° C leads to the destruction of pathogens and reduce the number of thermophilic bacteria and allows for further cooling of milk for a long time to keep the product without changing its quality.

Purpose. Create mathematical control temperature conditions in pasteurizing temperature control through the milk to regulate variations in temperature pasteurization and cooling.

To select the most efficient system control of pasteurization device parametric studied its properties, which investigated the input and output parameters, disturbing action sections of heating and cooling pasteurizers. To simplify the calculations recovery merged two sections one and two cooling sections into one. Created block diagram pasteurizers and based its study developed ways to control temperature and parametric diagrams sections: recovery, pasteurization and cooling plate pasteurizers. The mathematical model pasteurizer, which consists of a system of differential equations describing the dynamics of the process heat in sections. Using the model in environment MathCad calculations of the coefficients of the transfer function of the object through the channel temperature control in sections. When creating a mathematical model pasteurizer accepted that heat loss from the surface of the object to the environment and make minor 5% compared to the heat flow coming from the coolant to the product. Static characteristics sections pasteurizer received back system of balance equations for heat flow chambers separate sections. As a result of experimental and theoretical studies obtained dynamic characteristics of pasteurization used by the channel "discharge of hot water - temperature pasteurized milk." This model will develop control algorithms temperature conditions to increase productivity pasteurizer.

A block diagram of pasteurizers and based on research mathematical model pasteurizer, which consists of a system of differential equations describing the dynamics of the process heat in sections. This model will develop control algorithms temperature conditions to increase productivity pasteurizer.


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Посилання


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Lisenko,V., Chernishenko, E., Reshetyuk, V., Mіroshnik, V., Zaєts', N., Tsigul'ov, I. (2016). Іntensifіkatsіya ta modelyuvannya tekhnologіchnikh ob’єktіv [Intensification and modeling of technological objects]. Kyiv: AgrarMedіaGrup, 476.


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