Analytical Investigation of Thermoelectric Performance for Cooling Application (original) (raw)
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Theoretical study of thermoelectric cooling system performance
Journal of Engineering Research
This work provides a theoretical investigation to study the effect of different operational parameters on the performance of TE cooling system including the system COP and the rate of heat transfer. The parameters investigated are, the applied input power, inlet working fluid velocity, the arrangement of utilized TECs modules and fluid type. The geometry is created with ANSYS multi-physics software as a two-dimensional base case, it is consisted from two attached horizontal ducts of length (520 mm) and (560 mm), the interface surface between the two ducts contains three thermoelectric modules (4 mm height by 40 mm wide and 40 mm length). The distance between two consecutive thermoelectric modules (150 mm), the inlet and outlet duct diameter (15 mm) and the height of each duct (10 cm), the inlet voltage to thermoelectric modules ranges from 8.0 V to 12 V and the water inlet velocity to the two ducts from 0.001 to 0.01 m/s. Theoretical results showed that the overall COP of TE cooling system is increased with the applied input power up to 8.0 W then it decreases with input power up to 18 W after that it takes nearly a constant value, a noticeable enhancement in the COP is found when the three TECs are in use (Case 10) and the COP of TE cooling system using pure water and nanofluid with 0.05% of nanoparticles as coolants takes the maximum value.
Performance of Novel Thermoelectric Cooling Module
A geometrical shape factor was investigated for optimum thermoelectric performance of a thermoelectric module using finite element analysis. The cooling power, electrical energy consumption, and coefficient of performance were analyzed using simulation with different current values passing through the thermoelectric elements for varying temperature differences between the two sides. A dramatic increase in cooling power density was obtained, since it was inversely proportional to the length of the thermoelectric legs. An artificial neural network model for each thermoelectric property was also developed using input-output relations. The models including the shape factor showed good predictive capability and agreement with simulation results. The correlation of the models was found to be 99%, and the overall prediction error was in the range of 1.5% and 1.0%, which is within acceptable limits. A thermoelectric module was produced based on the numerical results and was shown to be a promising device for use in cooling systems.
ARTICLE INFO Cooling of electronics component is one of the major challenges faced by thermal engineers. In recent years, a significant increase in microprocessor power dissipation coupled with CPU size has resulted in an increase in heat fluxes. Microprocessor heat fluxes have also increased for many commercial applications. Therefore, thermal management is becoming one of most challenging issues and an important subject in regard to cooling system performance. For a number of applications, direct air-cooling systems like by applying blower, fan or water cooling are having moving parts and not reliable for continuous operation for long time and will have to be replaced or enhanced by other high performance compact cooling techniques. Liquid–vapor phase change, impinging jets spray, the use of thermoelectric modules and heat pipes are attractive cooling solutions for removing high heat fluxes because of their high heat transfer coefficients. In the present work we perform the initial experimental investigation and basic mathematical modeling to determine the thermal performance of thermoelectric module integrated with heat pipe for electronics cooling at different operating variables and parameters. Currently the experiments are in progress, so we put our initial experimental setup and discussions. The detail results after experiments will help us to analyze the temperature distribution and heat transfer limitation characteristic in thermoelectric module and its role in future of electronics cooling.
Cooling Performance of Thermoelectric Cooling (TEC) and Applications: A review
MATEC Web of Conferences, 2018
Thermoelectric cooling (TEC) is a new attractive method that is can be used as a temperature controller. Thermoelectric module (TEM) is a device that environmentally friendly utilizing for cooling and heating application such as heat pump and power generation. Therefore, the understanding of relation between electrical conductivity and heat conductivity of the TEC material is essentially to improve the coefficient of performance (COP) efficiency. The figure of merit is addressed by focusing the best material in TEC with different cooling material. The critical finding of TEC for this review paper is the higher the electrical conductivity and the lower thermal conductivity, the maximum the COP. Finally, the possiblity of the TEC application is reviewed according to the advantages of TEC such as high reliability, less maintenance and compact size that commercially found in large range of thermoelectric cooling system. N
COOLING PERFORMANCE OF THERMOELECTRIC COOLER MODULES: EXPERIMENTAL AND NUMERICAL METHODS
A novel pulse-driving method in which the pulse frequency modulation is was developed by optimising the input power owing to the duty cycle of rectangular wave to enhance the cooling efficiency and thermal stability of the thermoelectric module. The aim of this driving method is to have better control of the thermoelectric cooler module temperature and to improve its coefficient of performance. In this method, the average current and the peak of pulse drive are in the 50% duty cycle with the same magnitude and the performance of Peltier module driving with average dc is compared with the pulse driving. The measurement results show that the coefficient of performance of the thermoelectric module with the pulse-frequency modulation driving method increased up to 102% as compared to the constant dc driving method. An artificial neural network has been successfully used to analyse these experimentally collected data and predict the performance of the module. When the developed artificial neural network model was tested using untrained data, the average correlation of the model was 99% and the overall prediction error was 1.38%. An accurate and simple analytical equation based on the predicted and experimental results was determined using the MATLAB ® Curve Fitting Toolbox. The average correlation of the analytical model was 0.99 and the root-mean-square error was 0.074.
Review on Development of Thermoelectric Air cooler
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
With rising global temperatures leading to an increase in average temperatures throughout the year making people living in areas with high power outages very busy and difficult. As a modern cooling system that combines Coolers and Airconditioners does not work in the inverter for energy-saving purposes which makes them useless thus during high temperature hours. Therefore, in terms of combating the problem with portability, savings and cost-effectiveness in the concept of another climate it uses TEC while using the grid and recharging. Although it is common knowledge that the efficiency of TEC cooperation is low compared to the air-cooled air cooler used today but with advanced production techniques and forced delivery of cold liquid that increase effective device cooling and humidity control using humidity. suction and capillary tube as a heat sink to reduce heat in the hot sink instead of air fin to reduce the surrounding heat radiation. Basically in this study we tried to increase the performance coefficient of Peltier Module using various techniques. The module also does not save energy, so over time we will not be able to use many or two or three and we need to create a cooling effect. So we keep everything in mind using the right module to achieve the goal and make it a mass production model.
Improving the coefficient of performance of thermoelectric cooling systems: a review
International Journal of Energy Research, 2004
This paper reviews research carried out to improve the coefficient of performance of thermoelectric cooling systems during the past decade. This includes development of new materials for thermoelectric modules, optimisation of module design and fabrication, system analysis and heat exchange efficiency. Several conclusions are drawn.
Experimental and numerical investigation of a prototype thermoelectric heating and cooling unit
In this study, the performance of a prototype thermoelectric heating/cooling unit is investigated. In the numerical analysis, temperature–pressure contours, and velocity vectors are obtained for the selected fin geometry. In order to validate the numerical results, experimental analyses are carried out. The effects of the air velocity on the temperature distribution of the fin surfaces and the variation of the psychrometric properties of the air are measured for various TEC voltage differences. Thermal images are used to obtain the temperature variation on fin surfaces. COP values for heating and cooling are calculated. For different fan speeds, the heating and cooling COP values vary between 2.5 and 5, and 0.4 and 1, respectively. The study shows that it is possible to use TECs as an alternative method for HVAC applications with properly designed heat exchangers. Integrating them with photovoltaic panels provides utilization of solar energy, especially in cooling applications.
Design of Thermoelectric Air Cooler: A Review
The impact of ongoing progress in Science and Technology has created variety of systems that can be used in producing of refrigeration effect with the use of thermoelectric module and photovoltaic module for generation of energy in which we further use for cooling and heating effect. The most important utilization of this portable air cooler is for to deliver cold air. A Thermoelectric module (Peltier Module) is used instead of refrigeration system (VCC or VAC cycle). The most important utilization of this air cooler is for to deliver cold air. A Thermoelectric module (TEM) is used as it is based on the principles of Peltier effect. The use ofPeltier effect is to create heating side and cooling side and also to maintain effectiveness. Thermoelectric Air cooler (TEAC) is a solid state heat pump in which uses the components that are available commercially. The thermoelectric refrigerator does not produce chlorofluorocarbon (CFC). It is pollutant free-contains no liquids or gases, portable, compact, creates no vibration or noise because of the difference in the mechanics of the system. It is a prototype and its semiconductor materials, by Peltier effect, to provide instantaneous cooling or heating. It has the advantage of having no moving parts and thus maintenance free.
A review on thermoelectric cooling modules: Installation design, performance and efficiency
Scientific Research and Essays, 2013
A thermoelectric cooling module (TECM) is defined as a solid-state heat pump and present advantages (for example, no moving parts and no harmful gasses) over other refrigeration technologies. However, to optimally use TECMs as high efficient heat pumps it is crucial to understand the factors that influence the performance and efficiency of these modules during the installation design phase. This paper therefore provides a review on the installation design phase of TECMs together with the factors that influence the performance and efficiency during this phase. Information and a discussion on the hot and cold surface calculations, power supply calculations and heat sink calculations are provided in this work. The performance of the TECMs is influenced by the Joule heating effect, temperature difference over the TECMs and thermal conductance between the p-n junctions. The efficiency of the TECMs is influenced by the coefficient of performance (COP) and the method and type of control of the TECMs. These factors are discussed in detail. It is shown that the factors related to the performance and efficiency of the TECMs cannot be disregarded and must be taken into account during the installation design phase of the TECMs.