SU779799A1

SU779799A1 - Method of automatic regulating of temperature at the outlet of heat exchange apparatus

Info

Publication number: SU779799A1
Application number: SU782688458A
Authority: SU
Inventors: Валерий Иванович Алещенко; Владимир Яковлевич Тихонов; Николай Григорьевич Чухлиб; Борис Вениаминович Шелишпанский
Original assignee: Краснодарский политехнический институт
Priority date: 1978-11-24
Filing date: 1978-11-24
Publication date: 1980-11-15

Description

Изобретение относится к автоматическому регулированию температуры на выходе теплообменных аппаратов в пищевой, химической и других отраслях промышленности.The invention relates to automatic temperature control at the outlet of heat exchangers in the food, chemical and other industries.

Известен способ автоматического регу-$ пирования температуры на выходе теплообменного аппарата путем изменения расхода теплоносителя и подстройки параметров регулятора температуры по командному сигналуA known method for automatically controlling the temperature at the outlet of a heat exchanger by changing the flow rate of the coolant and adjusting the parameters of the temperature controller according to a command signal

В. качестве командного сигнала в известном способе используют температуру на выходе теплообменного аппарата.B. as a command signal in the known method using the temperature at the outlet of the heat exchanger.

Недостатком данного способа является _ί5то, что подстройка параметров регулятор ра температуры происходит только после изменения температуры вещества, что при 'значительной Инерционности объекта и датчика, а также при наличии запаздывания, очевидно, приводит к снижению качества регулирования. ...The disadvantage of this method is _ί5 that the adjustment of the parameters of the temperature controller occurs only after a change in the temperature of the substance, which, with a significant Inertia of the object and the sensor, as well as in the presence of delay, obviously leads to a decrease in the quality of regulation. ...

Цель изобретения - повышение качества регулирования.The purpose of the invention is improving the quality of regulation.

Поставленная цель достигается тем, что измеряют текущие значения нагрузки аппарата и расхода теплоносителя и используют их в качестве командного сигнала.This goal is achieved by measuring the current values of the load of the apparatus and the flow rate of the coolant and use them as a command signal.

На чертеже представлена схема системы регулирования по данному способу.The drawing shows a diagram of a regulatory system for this method.

Схема содержит регулятор 1 температуры, соединенный с исполнительным механизмом 2, изменяющим расход теплоносителя в теплообменный аппарат 3. Датчиками 4 и 5, измеряют текущие значения расхода теплоносителя'и нагрузки аппарата 3 соответственно. К регулятору 1 подключён функциональный блок 6, связанный с выходами датчиков 4 и 5. .The circuit contains a temperature controller 1, connected to an actuator 2, which changes the flow rate of the coolant to the heat exchanger 3. Sensors 4 and 5 measure the current flow rate of the coolant and the load of the apparatus 3, respectively. A function block 6 connected to the outputs of the sensors 4 and 5 is connected to the controller 1.

Работает система следующим образом.The system works as follows.

При отклонении температуры на выходе теплообменного аппарата от заданного значения регулятор 1 получает сигнал отклонения и ё помощью исполнительного механизма 2 изменяет расход теплоносителя в теплообменный аппарат 3 и ликвидирует это отклонение. При изменении расхода теплоносителя и нагрузки аппарата изме-When the temperature at the outlet of the heat exchanger deviates from the set value, the controller 1 receives a deviation signal and, using the actuator 2, changes the flow rate of the heat carrier to the heat exchanger 3 and eliminates this deviation. When the flow rate of the coolant and the load of the apparatus change

няются сигналы на выходе датчиков 4 иthere are signals at the output of the sensors 4 and

5, которые поступают в блок 6, который осуществляет подстройку параметров регулятора 1 практически безынерционно.5, which enter block 6, which performs the adjustment of the parameters of controller 1 almost inertialessly.

' Предлагаемый способ дает возможность повысить качество регулирования за счет безынерционной подстройки параметров регулятора.'The proposed method makes it possible to improve the quality of regulation due to inertialess adjustment of the controller parameters.

Claims

(54) METHOD FOR AUTOMATIC REGULATION OF THE TEMPERATURE AT THE OUTPUT OF HEAT EXCHANGE The invention relates to automatic control of the temperature at the outlet of heat exchangers in the food, chemical and other industries. There is a known method of automatic control of the temperature at the exit of the heat exchange apparatus by varying the flow rate of the heat transfer medium and adjusting the temperature controller based on a command signal. V. as a command signal in a known method uses the temperature at the outlet of the heat exchanger. The disadvantage of this method is that the adjustment of temperature control parameters j only occurs after a change in the temperature of the substance, which, with a significant inertia of the object and sensor, as well as in the presence of delay, obviously leads to a decrease in the quality of control ... improving the quality of regulation. APPARATUS The delivered circuit is achieved by measuring the current values of the apparatus load and coolant flow rate and using them as a command signal. The drawing shows a diagram of the control system in this way. The circuit contains a temperature controller 1 connected to the actuator 2, a replacement, and the flow rate of the loadings to the heat exchanger 3. Pilots 4 and 5 measure the current flow rates of the coolant and loadings Ta 3, respectively. A function block 6 is connected to controller 1, which is connected to the outputs of sensors 4 and 5.. The system works as follows. When the temperature at the outlet of the heat exchanger deviates from the setpoint, regulator 1 receives a deviation signal and, using the actuator 2, changes the flow rate of the heat transfer medium to the heating device 3 and eliminates this deviation. When changing the flow rate of the coolant and the load of the apparatus, the signals at the output of sensors 4 and 5 are changed, which are fed to block 6, which adjusts the parameters of regulator 1 almost instantly. The proposed method makes it possible to improve the quality of regulation due to the inertialess adjustment of the controller parameters. The invention The method of automatic control of the temperature at the exit of the heat exchanger 9 apparatus by changing the flow rate of heat. the carrier and adjustment of the parameters of the temperature controller by a command signal, differing in that; that, in order to increase the regulation part, the current values of the apparatus load and coolant flow are measured and they are used as a command signal. Sources of information taken into account in the examination 1. USSR author's certificate M 196906, cl. F 28 F 27/00, 1966.