Design and Optimization of Thermoelectric Cooling System Under Natural Convection Condition

2018 ◽  
Vol 10 (5) ◽  
Author(s):  
Xiaoyuan Ying ◽  
Fangming Ye ◽  
Ruitao Liu ◽  
Hua Bao
Keyword(s):  
Natural Convection ◽  
Heat Sink ◽  
Cooling System ◽  
Design Method ◽  
High Reliability ◽  
Experimental Tests ◽  
Heat Sinks ◽  
Thermoelectric Cooling ◽  
Cooling Performance ◽  
Design And Optimization

A design method for the thermoelectric cooling system is improved in this work based on a graphical approach. It is used to select an appropriate thermoelectric cooler (TEC) and determine the value of optimum input current. Theoretical analysis has been conducted to investigate the cooling performance of the system using the design method. Numerical simulation and experimental tests for the entire cooling system validate the calculation result, which indicates the high reliability of the theoretical design method. The temperature dependence of the heat sink resistance and the contact resistance are the major reasons for the small discrepancy. Research is then conducted based on the design method to investigate how a thermoelectric cooling system under natural convection performs, where the optimization of heat sinks at hot side of TEC is done by using the generalized correlations in the previous studies. Comparison is made between the thermoelectric cooling system and the bare-heat-sink system under natural convection. Results show that the thermal resistance of the heat sink attached to TEC is critical to the cooling performance of the whole system. Besides, TEC under natural convection can perform better than the passive cooling if the heat load is not very high (qc″≤20,000 W/m2). The design process and results can provide a useful guidance for other thermal engineers.

Numerical Analysis on Cooling Performance for FET Heat Sink

2014 ◽  
Author(s):  
Kyung Min Jang ◽  
Jun Young Kim ◽  
Cholongi Eum ◽  
KwangSun Kim
Keyword(s):  
Numerical Analysis ◽  
Heat Sink ◽  
Field Effect Transistors ◽  
Experimental Tests ◽  
Heat Sinks ◽  
Heating Value ◽  
Cooling Performance ◽  
Cooling Design ◽  
Improved Performance ◽  
Heat Sink Design

With the improved performance of IT devices like car microprocessors, the heat generated in the electric devices are being increased in amount. The increased heating value degrades the performance of devices and circuits, which will affect the durability and reliability of products eventually by causing their failure. Therefore, a study on the cooling performance improvement of heat sinks is essential to decrease the temperatures of the field effect transistors (FETs) in cars. In this study, numerical analysis and experimental tests were carried out to develop a new heat sink design for a different FET material, heat conductive resin. Without the heat sink, the new FET had a temperature distribution of 70–90 Celsius, which was measured in the laboratory environment similar to the real chamber within a car. Based on the numerical and experimental test and analysis of the FET new heat sink system, the improved shape and array of the fins are developed that meet the target temperature of the FET. For heat sinks, efficient cooling design and reduced manufacturing costs are derived from the comparison with those of old heat sink material, Aluminum.

scholarly journals Effect Of Position and Design Parameters of a Fan-Cooled Cold Side Heat Sink of a Thermoelectric Cooling-Module on The Performance of a Hybrid Refrigerator

2021 ◽  
Vol 85 (2) ◽  
pp. 66-79
Author(s):  
Yasser Abdulrazak Alghanima ◽  
Osama Mesalhy ◽  
Ahmed Farouk Abdel Gawad
Keyword(s):  
Heat Sink ◽  
Cooling System ◽  
Heat Sinks ◽  
Design Parameters ◽  
Vapor Compression ◽  
Thermoelectric Cooling ◽  
Cold Side ◽  
Peltier Module ◽  
Cooling Module ◽  
Good Agreement

This paper presents a CFD and experimental study of the thermal behavior of the thermoelectric-compartment in a hybrid household-refrigerator that combines thermoelectric and vapor-compression technologies. The hybrid refrigerator has three compartments. One of them is driven by a thermoelectric cooling system, which was made of one Peltier module and two fan-cooled heat sinks mounted on the hot and cold sides. The simulation results were compared with experimental measurements and showed a good agreement. The performance of the thermoelectric refrigerator was tested with changing the pushing direction. Two pushing directions for the fan were examined. In the first one (direction-I), the fan was fixed such that it sucked the air beside the cold heat sink. While in the second direction (direction-II), the fan was assumed to be flipped to push the air over the cold-side heat sink. The results showed that the second fan direction (direction-II) is more effective for heat transfer mechanism between the cold-side heat sink and the inside air of the thermoelectric-compartment.

Influence of selected factors on parameters of a cooling system with a Peltier module and forced air flow

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Krzysztof Posobkiewicz ◽  
Krzysztof Górecki
Keyword(s):  
Thermal Resistance ◽  
Heat Sink ◽  
Cooling System ◽  
Heat Sinks ◽  
Cooling Power ◽  
Cooling Systems ◽  
Content Type ◽  
Peltier Module ◽  
Peltier Modules ◽  
Forced Air

Purpose The purpose of this study is to investigate the validation of the usefulness of cooling systems containing Peltier modules for cooling power devices based on measurements of the influence of selected factors on the value of thermal resistance of such a cooling system. Design/methodology/approach A cooling system containing a heat-sink, a Peltier module and a fan was built by the authors and the measurements of temperatures and thermal resistance in various supply conditions of the Peltier module and the fan were carried out and discussed. Findings Conclusions from the research carried out answer the question if the use of Peltier modules in active cooling systems provides any benefits comparing with cooling systems containing just passive heat-sinks or conventional active heat-sinks constructed of a heat-sink and a fan. Research limitations/implications The research carried out is the preliminary stage to asses if a compact thermal model of the investigated cooling system can be formulated. Originality/value In the paper, the original results of measurements and calculations of parameters of a cooling system containing a Peltier module and an active heat-sink are presented and discussed. An influence of power dissipated in the components of the cooling system on its efficiency is investigated.

Thermally Optimum Natural Convection Cooled Longitudinal-Plate Heat Sinks With Horizontal Base Plates

2001 ◽  
Author(s):  
K. K. Sikka ◽  
C. George
Keyword(s):  
Natural Convection ◽  
Heat Sink ◽  
Base Plate ◽  
Heat Sinks ◽  
Geometrical Parameters ◽  
Plate Heat ◽  
Horizontal Orientation ◽  
Fin Spacing ◽  
Base Plates ◽  
Weakly Dependent

Abstract Longitudinal-plate fin heat sinks are optimized under natural convection conditions for the horizontal orientation of the heat sink base plate. The thermal performance of the heat sinks is numerically modeled. The fin height, thickness and spacing and heat sink width are systematically varied. The numerical results are validated by experimentation. Results show that the thermal resistance of a heat sink minimizes for a certain number of fins on the base plate. The fin spacing-to-length ratio at which the minimum occurs is weakly dependent on the fin height and thickness and heat sink width. The flow fields reveal that the minimum occurs for the heat sink geometry in which the number of fins are maximized such that the flow velocity as the air exits the fins is fully developed. A correlation of the heat transfer with the heat sink geometrical parameters is also developed.

Advanced Passive Thermal Management for LED Bulb Systems

2013 ◽  
Vol 2013 (DPC) ◽  
pp. 001277-001293
Author(s):  
James Petroski
Keyword(s):  
Natural Convection ◽  
Heat Sink ◽  
Energy Savings ◽  
Cooling System ◽  
Point Of View ◽  
Hazardous Substances ◽  
Size And Shape ◽  
Lighting Systems ◽  
Liquid Cooling System ◽  
Forced Cooling

The movement to LED lighting systems worldwide is accelerating quickly as energy savings and reduction of hazardous substances (RoHS) increase in importance. Furthering this trend are government regulations, rebate programs and declining prices. The market drive today is to replace light bulbs of common outputs (60W, 75W and 100W) without resorting to Compact Fluorescent (CFL) bulbs containing mercury while maintaining the standard industry bulb size and shape referred to as A19 for fixture retrofitting. This A19 size and shape restriction causes a small heat sink which is only capable of dissipating heat for 60W equivalent LED bulbs with natural convection. 75W and 100W equivalent bulbs require larger sizes, some method of forced cooling, or some unusual liquid cooling system; generally none of these approaches are desirable for light bulbs from a consumer point of view. Thus, there is interest in developing natural convection cooled A19 light bulb designs for LEDs that cool far more effectively than today's current designs. Current A19 size heat sink designs typically have thermal resistances of 5–7 °C/W. A more efficient method of cooling can be created using a chimney-based design to lower system thermal resistances below 4 °C/W while meeting all other requirements for bulb system design. Numerical studies and test data are in good agreement for various orientations including methods for keeping the chimney partially active in horizontal orientations. Such chimney-based designs are capable of cooling 75W and 100W equivalent LED light bulbs in the limited volume constraints of A19-size devices.

Analysis of natural convection in heat sink using OpenFOAM and experimental tests

2019 ◽  
Vol 55 (8) ◽  
pp. 2289-2304 ◽  
Author(s):  
Vilson Altair da Silva ◽  
Lorenzo Alfonso Caliari de Neves Gomes ◽  
Ana Lúcia Fernandes de Lima e Silva ◽  
Sandro Metrevelle Marcondes de Lima e Silva
Keyword(s):  
Natural Convection ◽  
Heat Sink ◽  
Experimental Tests

Partitioned Heat Sinks for Improved Natural Convection

2020 ◽  
Author(s):  
Todd Salamon ◽  
Roger Kempers ◽  
Brian Lynch ◽  
Kevin Terrell ◽  
Elina Simon
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Convective Heat Transfer ◽  
Antenna Arrays ◽  
Heat Sink ◽  
Massive Mimo ◽  
Vertical Plate ◽  
Numerical Models ◽  
Heat Sinks ◽  
Sensible Heat

Abstract The main drivers contributing to the continued growth of network traffic include video, mobile broadband and machine-to-machine communication (Internet of Things, cloud computing, etc.). Two primary technologies that next-generation (5G) networks are using to increase capacity to meet these future demands are massive MIMO (Multi-Input Multi-Output) antenna arrays and new frequency spectrum. The massive MIMO antenna arrays have significant thermal challenges due to the presence of large arrays of active antenna elements coupled with a reliance on natural convection cooling using vertical plate-finned heat sinks. The geometry of vertical plate-finned heat sinks can be optimized (for example, by choosing the fin pitch and thickness that minimize the thermal resistance of the heat sink to ambient air) and enhanced (for example, by embedding heat pipes within the base to improve heat spreading) to improve convective heat transfer. However, heat transfer performance often suffers as the sensible heat rise of the air flowing through the heat sink can be significant, particularly near the top of the heat sink; this issue can be especially problematic for the relatively large or high-aspect-ratio heat sinks associated with massive MIMO arrays. In this study a vertical plate-finned natural convection heat sink was modified by partitioning the heat sink along its length into distinct sections, where each partitioned section ejects heated air and entrains cooler air. This approach increases overall heat sink effectiveness as the net sensible heat rise of the air in any partitioned section is less than that observed in the unpartitioned heat sink. Experiments were performed using a standard heat sink and equivalent heat sinks partitioned into two and three sections for the cases of ducted and un-ducted natural convection with a uniform heat load applied to the rear of the heat sink. Numerical models were developed which compare well to the experimental results and observed trends. The numerical models also provide additional insight regarding the airflow and thermal performance of the partitioned heat sinks. The combined experimental and numerical results show that for relatively tall natural convection cooled heat sinks, the partitioning approach significantly improves convective heat transfer and overall heat sink effectiveness.

Sign in / Sign up

Export Citation Format

Share Document