Abstract
Super thermostatic device was designed, using electric heating jacket as the heating element, silicon controlled voltage regulator as the actuator, program temperature controller as the controller. Orthogonal experiment was carried out to investigate the influencing factors on temperature control error, such as the heating medium, heating power, stirring speed and target temperature. The experimental results indicated that heating power and stirring speed have significant influence on temperature control error; and under the optimal conditions, the designed thermostatic device has thermostat control precision, ± 0.2 ?, and temperature control accuracy, 0.3 ?, which showed that the thermostatic device is a super thermostatic device with program control function.
Highlights
Super-thermostatic device is a kind of high-accuracy thermostatic equipment that is widely used in a lot of scientific research and production fields such as bioengineering, medicine, food, chemical engineering, metallurgy, petroleum and so on[1, 2]
It can be seen from heat balance equation (1) that the factors of heating power, quantity of heating media, setting temperature and stirring rate can cause the change of temperature control error
Influencing factors on temperature control error. It is verified after the orthogonal experiment that the influence of stirring rate and heating power on temperature control error is more significant
Summary
Super-thermostatic device is a kind of high-accuracy thermostatic equipment that is widely used in a lot of scientific research and production fields such as bioengineering, medicine, food, chemical engineering, metallurgy, petroleum and so on[1, 2]. In order to make the media heated get well-distributed, other kind of media are required to be as the heat carriers normally. They are divided into water bath(within 100), oil bath Signal by adjusting its power, through which a temperature control system is constituted [4]. It can be seen from figure 1 that manipulated variable is the temperature of heat carriers. The temperature of heat carriers needs to be increased higher a little bit so that the temperature of heated media can be guaranteed. Afterwards, the optimum parameters are adopted to have thermostatic performance and programming temperature control performance tests
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