Numerical and Experimental Research on Flow Resistance of Cool Medium from Heat Dissipation System for Construction Vehicles

2018 ◽  
Author(s):  
Jiaxin Liu ◽  
Baozhong Wang ◽  
Yankun Jiang ◽  
Haiyang Long
Keyword(s):  
Experimental Research ◽  
Flow Resistance ◽  
Heat Dissipation ◽  
Cool Medium ◽  
Dissipation System

Heat dissipation system based on electromagnetic driven rotational flow of liquid metal coolant

2021 ◽  
pp. 1-14
Author(s):  
Lei Wang ◽  
Xudong Zhang ◽  
Dr. Jing Liu ◽  
Yixin Zhou
Keyword(s):  
Liquid Metal ◽  
Thermal Resistance ◽  
Heat Dissipation ◽  
High Efficiency ◽  
Cooling System ◽  
Electric Heater ◽  
Power Relationship ◽  
Rotational Flow ◽  
Large Power ◽  
Dissipation System

Abstract Liquid metal owns the highest thermal conductivity among all the currently available fluid materials. This property enables it to be a powerful coolant for the thermal management of large power device or high flux chip. In this paper, a high-efficiency heat dissipation system based on the electromagnetic driven rotational flow of liquid metal was demonstrated. The velocity distribution of the liquid metal was theoretically analyzed and numerically simulated. The results showed that the velocity was distributed unevenly along longitudinal section and the maximum velocity appears near the anode. On the temperature distribution profile of the heat dissipation system, the temperature on the electric heater side was much higher than the other regions and the role of the rotated liquid metal was to homogenize the temperature of the system. In addition, the thermal resistance model of the experimental device was established, and several relationships such as thermal resistance-power curve were experimentally measured. The heating power could be determined from the temperature-power relationship graph once the maximum control temperature was given. The heat dissipation method introduced in the paper provides a novel way for fabricating compact chip cooling system.

Convective Cooling of Compact Electronic Devices via Liquid Metals with Low Melting Points

2021 ◽  
Author(s):  
Guilin Liu ◽  
Jing Liu
Keyword(s):  
Heat Transfer ◽  
Melting Point ◽  
Liquid Metal ◽  
High Performance ◽  
Flow Resistance ◽  
Heat Dissipation ◽  
Liquid Metals ◽  
Electronic Devices ◽  
Convective Cooling ◽  
Heat Exchanger Design

Abstract The increasingly high power density of today's electronic devices requires the cooling techniques to produce highly effective heat dissipation performance with as little sacrifice as possible to the system compactness. Among the currently available thermal management schemes, the convective liquid metal cooling provides considerably high performance due to their unique thermal properties. This paper firstly reviews the studies on convective cooling using low-melting-point metals published in the past few decades. A group of equations for the thermophysical properties of In-Ga-Sn eutectic alloy is then documented by rigorous literature examination, following by a section of correlations for the heat transfer and flow resistance calculation to partially facilitate the designing work at the current stage. The urgent need to investigate the heat transfer and flow resistance of forced convection of low-melting-point metals in small/mini-channels, typical in compact electronic devices, is carefully argued. Some special aspects pertaining to the practical application of this cooling technique, including the entrance effect, mixed convection, and compact liquid metal heat exchanger design, are also discussed. Finally, future challenges and prospects are outlined.

scholarly journals Bio-inspired Heat Dissipation System Integrated in Buildings: Development and Applications

2017 ◽  
Vol 111 ◽  
pp. 51-60 ◽  
Author(s):  
Amaia Zuazua-Ros ◽  
César Martín-Gómez ◽  
Juan Carlos Ramos ◽  
Tomás Gómez-Acebo
Keyword(s):  
Heat Dissipation ◽  
Dissipation System

scholarly journals The Heat-Dissipation and Dehumidification System of the Hybrid Multi-Layer Gravity Heat Pipe Applied to Granary

2019 ◽  
Vol 13 (8) ◽  
pp. 76
Author(s):  
Guoyong Su ◽  
Yu Wu ◽  
Wei Gao
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Heat Dissipation ◽  
Internal Heat ◽  
Internal Temperature ◽  
Transfer Mode ◽  
Working Principle ◽  
Booster Fan ◽  
Working Efficiency ◽  
Dissipation System

Based on the basic working principle and heat transfer characteristics of gravity heat pipe in combination with the grain stack particle's stacking characteristics, this study changes the structure of traditional heat pipe to change the heat transfer mode between the grain stack and the gravity heat pipe so as to improve the grain's heat-dissipation rate and heat-dissipation efficiency. Generally, this system can satisfy the internal heat dissipation requirements of grain stack only under the action of a non-power fan driven by the air in the atmosphere and the temperature difference between inside and outside of the fan. When the internal temperature sensor of the grain stack detects that the internal temperature of the grain stack is high only under the action of the non-power fan, the pipeline booster fan will be started. At the same time, when the gas exchange occurs between the internal gas in grain stack and the external air, the dehumidification and drying of the grain stack can be realized through the gas drying device of the product. Through theory and simulation, this paper conducts a comparative analysis on the variation law of grain stack's temperatures under the action of gravity heat pipe and no gravity heat pipe so as to explore the heat-dissipation system's working efficiency of the new structure gravity heat pipe. The gravity heat pipe and the non-power fan in the system are all green products, which makes this design product have better heat-dissipation effect and less energy consumption.

scholarly journals The Comparison of Water Cooling Media Against Radiator Heat Dissipation Rate in Diesel Engines

2021 ◽  
Vol 3 (1) ◽  
pp. 19-26
Author(s):  
Muhammad Sawaludin ◽  
Hasan Maksum ◽  
Wagino Wagino
Keyword(s):  
Experimental Research ◽  
Diesel Engines ◽  
Heat Dissipation ◽  
Statistical Tests ◽  
Working Fluid ◽  
Research Approach ◽  
Water Cooling ◽  
Average Decrease ◽  
Cooling Media ◽  
The Heat Transfer Coefficient

This research was motivated by the large number of consumer requests for mechanics in workshops to replace the radiator coolant in diesel engines with reguler water. This research used an experimental research approach. The experimental research was often used to find the effect of existing variable and to test the hypotheses. Based on the results of testing and data analysis that have been carried out can be seen: there was an average decrease in the temperature of the cooling media from the engine due to using the cooling media from the manufacturer, a decrease in the rate of heat dissipation between reguler water and Prestone on each rotation with an average of 4.97%, the water with TOP 1 Coolant 5.11% and the water with Toyota SLCC at 6.64%. Based on the analysis of research data and statistical tests, it was concluded that the use of cooling media from the manufacturer can increase the heat transfer coefficient of the working fluid of the radiator, so that it can reduce the engine heat level and increase the rate of coolant heat dissipation. Penelitian ini dilatarbelakangi oleh banyaknya permintaan konsumen kepada mekanik di bengkel untuk mengganti air radiator pada mesin diesel dengan air biasa Penelitian ini digolongkan pada penelitian pendekatan eksperimen. Penelitian eksperimen sering digunakan untuk mencari pengaruh di antara variabel-variabel yang ada serta untuk pengujian hipotesis. Hasil pengujian dan analisis data yang telah dilakukan dapat diketahui: Terdapat rata-rata penurunan suhu media pendingin dari mesin akibat menggunakan media pendingin asal pabrikan, penurunan laju pembuangan panas antara air biasa dengan Prestone pada masing-masing putaran dengan rata-rata 4,97%, air dengan TOP 1 Coolant 5,11% dan air dengan Toyota SLCC sebesar 6,64%. Berdasarkan analisis data penelitian dan uji statistik yang dilakukan disimpulkan bahwa penggunaan media pendingin asal pabrikan dapat memperbesar koefisien perpindahan panas fluida kerja radiator sehingga dapat menurunkan tingkat panas mesin dan meningkatkan laju pembuangan panas cairan pendingin

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