scholarly journals PWM controller for thermoelectric devices used in a climatization system

2021 ◽  
Vol 2 (3) ◽  
pp. 4448-4458
Author(s):  
Eugenia Salazar Rivera ◽  
Osvaldo López Hernández ◽  
Alfredo Benítez Lara ◽  
Sandra Jiménez Xochimitl
Keyword(s):  
Control System ◽  
Duty Cycle ◽  
Open Loop ◽  
Operating Conditions ◽  
Temperature Control System ◽  
Thermoelectric Device ◽  
Thermoelectric Element ◽  
Heating And Cooling ◽  
El Sistema ◽  
Power Stage

ABSTRACT The present work describes the development of an open loop temperature control system in a container through a Peltier Cell. The control consists of applying a PWM signal to the thermoelectric device, which controls the temperature in a range of 5 to 90 °C. A study was carried out to characterize the frequency and duty cycle of the PWM and thus determine the best operating conditions for the thermoelectric element. In addition, a power stage was implemented to change the supply polarity in the Peltier cell and, in this way, to be able to exchange the heating and cooling faces. The study carried out leaves the basis for implementing climatization system on a larger scale using thermoelectric elements in a novel and versatile way.   RESUMEN El presente trabajo describe el desarrollo de un sistema de control de temperatura en lazo abierto en un contenedor mediante una célula Peltier. El control consiste en aplicar una señal PWM al dispositivo termoeléctrico, que controla la temperatura en un rango de 5 a 90 °C. Se realizó un estudio para caracterizar la frecuencia y el ciclo de trabajo del PWM y así determinar las mejores condiciones de funcionamiento del elemento termoeléctrico. Además, se implementó una etapa de potencia para cambiar la polaridad de alimentación en la célula Peltier y, de esta manera, poder intercambiar las caras de calentamiento y enfriamiento. El estudio realizado deja las bases para implementar el sistema de climatización a mayor escala utilizando elementos termoeléctricos de forma novedosa y versátil.  

scholarly journals Intelligent Egg Incubator

2020 ◽  
Vol 2 (2) ◽  
pp. 91-102
Author(s):  
Kaiyisah Baiduri Azahar ◽  
Ericka Ensimau Sekudan ◽  
Ahmad Mirza Azhar
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Temperature Sensor ◽  
Threshold Value ◽  
Temperature Control System ◽  
Motion Sensor ◽  
Chicken Egg ◽  
Heating And Cooling ◽  
Cooling Unit ◽  
Chicken Eggs

This research presents the design and development of a chicken egg incubator. The aim is to design and construct an “Intelligent Egg Incubator” that can hatch chicken eggs automatically. In the design, author used a temperature control system that controls the temperature of the incubator. This system consists of a temperature sensor, heating and cooling elements and a controller. If the temperature of the incubator exceeds a certain value, the cooling unit will operate to reduce the temperature while if the temperature goes below another threshold value, the heating element will start to operate to increase the temperature. Furthermore, author used a motion sensor to detect the movements of the eggs. If there is a movement inside the incubator, the owner of the incubator will get the notification about the conditions of the eggs

Temperature Control System for Recirculation Fish-Holding Facilities

1972 ◽  
Vol 29 (7) ◽  
pp. 1082-1083 ◽  
Author(s):  
K. R. Scott
Keyword(s):  
Stainless Steel ◽  
Control System ◽  
Temperature Control ◽  
The Self ◽  
Temperature Control System ◽  
Electric Resistance ◽  
Electronic Temperature ◽  
Set Point ◽  
Temperature Controller ◽  
Heating And Cooling

The self-contained conditioning unit included heating, refrigeration, filtration, and aeration devices on a caster-mounted frame. Heating and cooling were performed in a stainless steel combination cooler-heater unit. Heating is produced by an electric resistance element and cooling by a water-cooled hermetic refrigeration compressor. Temperatures were maintained within ± 0.06 C degree of set point between 2 and 20 C in two 200-gal tanks using a modulating electronic temperature controller.

Application of Intelligent Track Guiding Control Algorithm on the Temperature Control of the Water Bath of a Specific Container

2014 ◽  
Vol 631-632 ◽  
pp. 743-746
Author(s):  
Wen Biao Wang ◽  
Zhan Yuan Ge ◽  
Si Yuan Wang ◽  
Shuang Chen
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Control Algorithm ◽  
External Disturbance ◽  
Bath Temperature ◽  
Operating Conditions ◽  
Water Bath ◽  
Step Response ◽  
Temperature Control System ◽  
Adjustment Time

Aiming at the water bath temperature control system of great inertia, pure time-delay, non-linear and time changeable characteristics, a kind of simple and practical control algorithm is put forward in this paper：ITGC (Intelligent Track Guiding Control). ITGC and PID control system was carried out respectively step response test and the disturbance test in the MATLAB/SIMULINK simulation platform; And can be successfully applied in practical projects. Studies have shown that: ITGC control on the overshoot and adjustment time are better than the conventional PID method, the control scheme has stronger robustness and anti-jamming capability under various operating conditions and an increase in external disturbance case. Successfully resolved the difficulty of time-varying parameters and large lag in the temperature control system.

A Design of DSPIC Based Microfluidic PCR Chip Temperature Controlling System

2011 ◽  
Vol 108 ◽  
pp. 206-211 ◽  
Author(s):  
Li Wang ◽  
Hui Xue Song ◽  
Tan Chen ◽  
Zhan Hui Wang
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Temperature Control System ◽  
Pid Algorithm ◽  
Heating And Cooling ◽  
Controlling System ◽  
Stable Performance ◽  
Polymerase Chain ◽  
On Chip ◽  
And Control

In this paper a dsPIC microcontroller based temperature control system is developed for polymerase chain reaction (PCR) on-chip. PCR is one of the most important techniques in molecular biology and temperature control is the key technique of PCR. Yet, most of the works are based on PC, through an RS 232 interface to set and control the temperature. Here we design a temperature control system based on DSPIC Microcontroller. It can be much portable and cheaper than PC based systems. The system configuration mainly consists of a high precision, stable performance sensor PT1000, a signal amplification circuit, a PID algorithm. And then, we use MAX1978 to improve the accuracy of temperature control. After that we choose thermoelectric cooler (TEC) modules as actuator to improve system heating and cooling rate. It is believe that the portable PCR temperature control system will play an important role in the development of the Microfluidic PCR.

Temperature Control System Design of Rapid Thermal Cycle Injection Moulds with Steam Heating of Display Shell

2012 ◽  
Vol 263-266 ◽  
pp. 629-633
Author(s):  
Feng Li Huang ◽  
Jin Mei Gu ◽  
Jin Hong Xu ◽  
Nan Shuai
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Thermal Cycle ◽  
Mold Temperature ◽  
Temperature Control System ◽  
Steam Heating ◽  
Injection Process ◽  
Heating And Cooling ◽  
Large Injection ◽  
Short Shot

Rapid thermal cycle injection molding technology with steam heating can solve the defect in routine injection process thoroughly, such as short shot, jetting and weld lines etc, it is widely used in large injection mold with high forming quality requirements. In this paper, temperature control system of rapid thermal cycle injection moulds with steam heating of display shell is designed. First, give the overall dimension of display shell, heating and cooling method and the layout scheme. Second, give the control scheme and control parameter of display shell mold temperature. Last, the hardware, software, temperature control algorithm and human-computer interface of temperature control system is designed detailed after the type of PLC and design software of human-computer are chosen.

Modeling and Fuzzy Control of a Crude Oil Preheating Furnace

2012 ◽  
Vol 229-231 ◽  
pp. 2370-2374 ◽  
Author(s):  
A. Chaibakhsh ◽  
M. Pourbeheshtian ◽  
M.J. Javadi Sigaroudi ◽  
H.R. Najafi
Keyword(s):  
Control System ◽  
Fuzzy Logic Controller ◽  
Operating Conditions ◽  
Temperature Control System ◽  
Outlet Temperature ◽  
Furnace Temperature ◽  
Empirical Relations ◽  
Geometrical Data ◽  
Feedforward Controller ◽  
Semi Empirical

This paper presents the development of mathematical model and designing a temperature control system for an industrial preheating furnace. In the first part of the paper, the simulation model was developed based on thermodynamics principles, energy-mass balance and semi-empirical relations. The parameters of developed models were defined with respect to available operational and geometrical data from real system. In the second part, an appropriate control system was designed for regulating the preheating furnace temperature. A fuzzy logic controller and a feedback/feedforward controller were employed for operating in coordination with each other to maintain the process outlet temperature around 360 oC. Simulation results show the capability of the designed control system to regulate the furnace outlet temperature at different operating conditions and in the presence of disturbances.

Temperature Control System for Transformer Three-Phase 50 Hz 2500 kVA

2017 ◽  
Vol 3 (2) ◽  
pp. 88
Author(s):  
Suci Rahmatia ◽  
Marsah Zaysi Makhudzia
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Heat Loss ◽  
Temperature Control ◽  
Electrical Energy ◽  
Temperature Control System ◽  
Iron Core ◽  
Electrical Device ◽  
Optimal Control System ◽  
Three Phase

<p><em>Abstrak <strong>- </strong></em><strong>Transformator adalah peralatan listrik yang sangat vital dalam proses pembangkitan maupun transmisi energi listrik karena transformator dapat menaikkan atau menurunkan tegangan. Pada proses menaikkan dan menurunkan tegangan biasanya sering timbul panas akibat rugi – rugi tembaga pada inti besi dan kumparannya sehingga pada kondisi overload akan menimbulkan pemanasan yang berlebih dan dapat mempengaruhi kinerja transformator. Oleh karena itu dibuat sistem kontrol temperatur pada transformer yang dapat mengontrol temperatur di dalam transformator saat bekerja pada kondisi overload, sehigga transformatornya tidak terbakar. Dial thermometer digunakan sebagai alat yang mengontrol temperatur transformator pada sistem kontrol temperatur. Agar mendapatkan sistem kontrol yang optimal, maka setting temperatur pada dial thermometer di sesuaikan dengan temperatur maksimal tranformator dapat bekerja. Sehingga pada saat temperatur tertentu dial thermometer dapat memberikan sinyal untuk membunyikan alarm dan mengaktifkan kontrol kipas sehingga kipas dapat bekerja menurunkan temperatur transformator.<em></em></strong></p><p><strong><em> </em></strong></p><p><strong><em>Kata kunci - </em></strong><em>transformator, rugi – rugi tembaga, temperatur, sistem kontrol, dial thermometer<strong>.</strong></em></p><p><strong><em> </em></strong></p><p><em>Abstract <strong>- </strong></em><strong>A transformer is an electrical device that is vital in the generation and transmission of electrical energy because the transformer can raise (stepping up) or lower (stepping down) the voltage. In the process of raising and lowering the voltage is usually often caused heat loss of copper in iron core and coil so that the overload condition will cause excessive warming and can affect the performance of the transformer. Therefore, a temperature control system on the transformer can control the temperature inside the transformer while working under overload conditions, so the transformer is not burned. Dial thermometer is used as a device that controls the temperature of the transformer in the temperature control system. In order to obtain an optimal control system, the temperature setting on the dial thermometer adjusted to the maximum transformer temperature can work. So that when a certain temperature dial thermometer can provide a signal to sound the alarm and activate the fan control so that the fan can work down the transformer temperature.</strong></p><p><strong> </strong></p><p><strong><em>Keywords -  </em></strong><em>transformator, loss of copper, themperature, control system, dial thermometer<strong></strong></em></p>

Temperature control system for cement decomposing furnace based on three-dimensional fuzzy and PID control strategy

2009 ◽  
Vol 2009 (10) ◽  
pp. 37-42 ◽  
Author(s):  
Xuejun Li ◽  
Yuan Zhou ◽  
Guangfu Bin ◽  
Ganqing Chen
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Control Strategy ◽  
Pid Control ◽  
Three Dimensional ◽  
Temperature Control System
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