Control of the temperature in the hot liquid tank by using a digital PID controller considering the random errors of the thermometer indications

Taler, Dawid; Sobota, Tomasz; Jaremkiewicz, Magdalena; Taler, Jan

doi:10.1016/j.energy.2021.122771

Cited by 21 publications

(4 citation statements)

References 26 publications

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“…In previous studies, researchers have used it to control the temperature of the output water and introduced a fuzzy control algorithm into the system [3,4]. These studies have effectively improved the control effect of the water tank outlet temperature, but most of them stay in the aspect of industrial control and do not take into account the use needs of the household environment.…”

Section: Literature Reviewmentioning

confidence: 99%

A design of a household output water temperature control system based on the PID controller and feedforward control

Liu

2024

J. Phys.: Conf. Ser.

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Household bathroom products are facing the problems of input water temperature fluctuation and effluent temperature control delay, which brings trouble to consumers. This essay will propose a solution that controls the water temperature at the effluent end by adding a water tank and an electrical heater. The author establishes a mathematical model of the water tank and calculates the transfer functions of different parts of the control system. He also chooses a PID controller as the core of the closed-loop system. A feedforward control system is built into the design to reduce the effect of the disturbance. Simulink software is used to conduct the simulation experiment. The result of the simulation shows that the change in heat provided by the heater has the ability to control the temperature of the output water. Additionally, the feedforward control system can reduce the influence of the input water temperature effectively.

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Section: Literature Reviewmentioning

confidence: 99%

A design of a household output water temperature control system based on the PID controller and feedforward control

Liu

2024

J. Phys.: Conf. Ser.

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“…Three-wire PT100 platinum resistance thermometers were mounted at the center of the tank at three different levels, as shown in Figure 2a. The temperature was collected and recorded via the data acquisition system every 10 s. The PT100 has a time constant of 1 s, which is sufficient for the thermometer reading [32]. The ambient conditions in the testing room were controlled at the dry bulb temperature of 35 • C ± 1 • C and the wet bulb temperature of 24 • C ± 1 • C, respectively.…”

Section: Verification Of Simulation Modelmentioning

confidence: 99%

Comparative Study of Inlet Structure and Obstacle Plate Designs Affecting the Temperature Stratification Characteristics

Trinuruk

Jenyongsak

2022

Energies

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Temperature stratification between outgoing hot water and incoming cold water is a key factor in diminishing energy loss during the discharging process and maximizing the useful hot water delivered from the tank or enhancing the thermal efficiency of the heating device during the heating process. In this study, the inlet structure and the obstacle plate were designed and modified based on two main factors, the reduction of inlet water velocity and the stipulation of the water recirculation area, to develop temperature stratification through the computational fluid dynamics method. The simulation model’s accuracy was validated against the experimental results. The results showed that using the equalizer as an inlet pipe’s auxiliary device was the best approach for decreasing the inlet water velocity, which resulted in enhancing temperature stratification. The discharging efficiency improved from 77.3% for the original tank model to 86.1% for the tank with equalizer IV model, which meant an additional 45 L of useful hot water was gained from the good temperature stratification storage tank. The installation of the obstacle plate for controlling the turbulence zone could not improve temperature stratification significantly, which resulted in an increase in discharging efficiency by only 4% more than the original tank model.

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“…Mizumoto et al have proposed employing a PID controller design to control the tank liquid system [34]. Taler et al have put forward and applied a method to control the hot fluid with PID [35]. Samin et al realized the control of the liquid tank system with PID with PLC.…”

Section: Introduction *mentioning

confidence: 99%

Controlling a Single Tank Liquid Level System with Classical Control Methods and Reinforcement Learning Methods

Çimen,

Garip

2024

Kocaeli Journal of Science and Engineering

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In this study, the control of the single tank liquid level system used in control systems have been carried out. The control of the single tank liquid level system has been performed with the classic PI, modified PI, state feedback with integrator action, and Q learning algorithm and SARSA algorithms, one of the artificial intelligence methods. The tank system to be modelled was carried out using classical physics, namely Newton's laws. Then, the mathematical model obtained of the system that are continuous model in time is acquired. The originality of the study; the non-linear liquid tank system is controlled by classical controllers and reinforcement methods. For this purpose, the system was firstly designed to model the system, then the system have been linearized at a specific point in order to design classic PI, modified PI, and state feedback with integral. After that, agents of Q Learning algorithm and SARSA algorithms were trained for the system. Then the agents have controlled the single -level tank system. The results of the classic controllers and supervised system are contrasted with regard to performance criteria such as rising time, settling time, overshoot and integral square error. Consequently, Q learning algorithm has produced and exhibited more thriving and successful results than other methods.

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Control of the temperature in the hot liquid tank by using a digital PID controller considering the random errors of the thermometer indications

Cited by 21 publications

References 26 publications

A design of a household output water temperature control system based on the PID controller and feedforward control

A design of a household output water temperature control system based on the PID controller and feedforward control

Comparative Study of Inlet Structure and Obstacle Plate Designs Affecting the Temperature Stratification Characteristics

Controlling a Single Tank Liquid Level System with Classical Control Methods and Reinforcement Learning Methods

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