scholarly journals Pengaruh Penggunaan Cascade Straight Heat Pipe Terhadap Temperatur Kerja CPU

Jurnal METTEK ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 84
Author(s):  
I Wayan Gede Widyantara
Keyword(s):  
Data Processing ◽  
Heat Pipe ◽  
Human Activities ◽  
Cooling System ◽  
Great Influence ◽  
Heat Pipes ◽  
Working Temperature ◽  
Human Need ◽  
Very High

Seiring perkembangan jaman, kebutuhan manusia akan komputer sangatlah tinggi. Berbagai aktivitas manusia sekarang mulai mengarah kepada penggunaan komputer. Kalo kita cari artinya, komputer itu adalah alat yang digunakan untuk melakukan pengolahan data. Kadangkala dalam penggunannya komputer mengalami permasalahan yang diakibatkan penggunaan yang berlebihan yang menyebabkan komputer panas sehingga sering terjadi yang namanya lag. Panas ini harus segera dibuang agar tidak merusak komponen hardware lainnya. Sistem pendinginan untuk CPU mulai mengarah pada penggunaan pipa kalor sebagai pendingin. Pipa kalor ini dapat mengatasi panas yang ditimbulkan oleh CPU yang nantinya akan membantu mengembalikan performa dari CPU tersebut. Pendinginan dengan menggunakan pipa kalor dilakukan secara cascade atau bertingkat. Cascade straight heat pipe pada pengujian kali ini terdiri dari single kondensor dan double kondensor yang sama-sama diberikan pembebanan 10 watt, 20 watt, 30 watt, 40 watt dan 48 watt. Pembebanan ini mewakili kondisi CPU saat diberikan beban kerja. Hasilnya cascade straight heat pipe double kondensor sangat memberikan pengaruh yang besar terhadap penurunan temperatur kerja CPU. Terbukti pada pembebanan 48 watt, double kondensor cascade straight heat pipe mampu menurunkan suhu hingga 64,06°C Undeniably, the human need for computers is very high. Various human activities are now beginning  lead to the use of computers. If we look for the meaning, the computer is a tool used for data processing. Sometimes in the use of computers get problems caused by excessive use that causes the computer to heat up so that it often happens that the name lag. This heat must be removed immediately so as not to damage other hardware components.   Today's era, the cooling system for the CPU starts to lead to the use of heat pipes as coolants. This heat pipe can overcome the heat generated by the CPU which will help restore the performance of the CPU. Cooling by using heat pipes is done in a cascade or multilevel manner. The Cascade straight heat pipe in this test consisted of a single condenser and a double condenser which were both given 10 watts, 20 watts, 30 watts, 40 watts and 48 watts of load. This load represents the CPU condition when given a workload. The result is a double condenser cascade straight heat pipe which has a great influence on reducing CPU working temperature. Evidenced by the 48 watt load, the double condenser cascade straight heat pipe can reduce the temperature to 64.06°C

Production Stainless Gravitational Heat Pipes Filled with Distilled Water

2016 ◽  
Vol 832 ◽  
pp. 184-191 ◽  
Author(s):  
Marián Jobb ◽  
Ľuboš Kosa ◽  
Michal Holubčík ◽  
Radovan Nosek
Keyword(s):  
Heat Pipe ◽  
Operating Temperature ◽  
Heat Pipes ◽  
Distilled Water ◽  
Aisi 304 ◽  
Working Temperature ◽  
Essential Function ◽  
Aisi 316 ◽  
Process Measurements ◽  
Pipe Manufacturing

This article deals with the performance of heat pipes, depending on the operating temperature and positions (operation angle). There is described the essential function of the heat pipe manufacturing process. Measurements were carried at an operating temperature of 40 °C to 90 °C. Stainless heat pipes were made of three kinds of materials AISI 304, AISI 310, AISI 316 and filled with a distilled water, up to 20% of the heat pipe inner volume. For each material was selected heat pipe with the best results. The heat pipes were measured at various angles of vertical inclination (0 ° - 90 °), at the working temperature 90 ° C. The performance was measured on the experimental device. Presented results show the progress of individual measurements and the effect of operating parameters on the performance of heat pipes.

Fundamental Heat Transfer Experiments of Heat Pipes for Turbine Cooling

1998 ◽  
Vol 120 (3) ◽  
pp. 580-587 ◽  
Author(s):  
S. Yamawaki ◽  
T. Yoshida ◽  
M. Taki ◽  
F. Mimura
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Cooling System ◽  
Infrared Image ◽  
Heat Pipes ◽  
Performance Criteria ◽  
Working Fluid ◽  
Steel Shell ◽  
Turbine Cooling ◽  
Start Up

Fundamental heat transfer experiments were carried out for three kinds of heat pipes that may be applied to turbine cooling in future aero-engines. In the turbine cooling system with a heat pipe, heat transfer rate and start-up time of the heat pipe are the most important performance criteria to evaluate and compare with conventional cooling methods. Three heat pipes are considered, called heat pipe A, B, and C, respectively. All heat pipes have a stainless steel shell and nickel sintered powder metal wick. Sodium (Na) was the working fluid for heat pipes A and B; heat pipe C used eutectic sodium-potassium (NaK). Heat pipes B and C included noncondensible gas for rapid start-up. There were fins on the cooling section of heat pipes. In the experiments, and infrared image furnace supplied heat to the heat pipe simulating turbine blade surface conditions. In the results, heat pipe B demonstrated the highest heat flux of 17 to 20 W/cm2. The start-up time was about 6 minutes for heat pipe B and about 16 minutes for heat pipe A. Thus, adding noncondensible gas effectively reduced start-up time. Although NaK is a liquid phase at room temperature, the startup time of heat pipe C (about 7 to 8 minutes) was not shorter than the heat pipe B. The effect of a gravitational force on heat pipe performance was also estimated by inclining the heat pipe at an angle of 90 deg. There was no significant gravitational dependence on heat transport for heat pipes including noncondensible gas.

Cooling of Notebook PCs by Flexible Oscillating Heat Pipes

2005 ◽  
Author(s):  
Yoshiro Miyazaki
Keyword(s):  
Heat Pipe ◽  
Thermal Performance ◽  
Cooling System ◽  
Rear Surface ◽  
Heat Pipes ◽  
Developmental Study ◽  
Maximum Heat ◽  
Oscillating Heat Pipe ◽  
Heating Section ◽  
Flexible Tubes

An oscillating heat pipe consists of a micro channel which turns many times between the heating section and the cooling section. Herein, a developmental study on flexible oscillating heat pipes for cooling notebook personal computers is presented. The heat pipe functions to transport heat from the CPU to the rear surface of the folding display, which serves as a radiating surface. The heat pipe tubes at the hinge are flexible so that the heat pipe may fold. In order to evaluate the thermal performance of the cooling system, flexible oscillating heat pipes were fabricated and tested. The heat pipes consist of copper capillary tubes and Teflon flexible tubes. Excellent thermal performance was obtained in the test: the thermal resistance was 0.3 K/W and the maximum heat transport capability was 100 W.

scholarly journals Fundamental Heat Transfer Experiments of Heat Pipes for Turbine Cooling

1997 ◽  
Author(s):  
Shigemichi Yamawaki ◽  
Toyoaki Yoshida ◽  
Masanobu Taki ◽  
Fujio Mimura
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Cooling System ◽  
Infrared Image ◽  
Heat Pipes ◽  
Performance Criteria ◽  
Working Fluid ◽  
Steel Shell ◽  
Turbine Cooling ◽  
Start Up

Fundamental heat transfer experiments were carried out for three kinds of heat pipes which may be applied to turbine cooling in future aero-engines. In the turbine cooling system with a heat pipe, heat transfer rate and start-up time of the heat pipe are the most important performance criteria to evaluate and compare with conventional cooling methods. Three heat pipes are considered, called heat pipe A, B and C, respectively. All heat pipes have a stainless steel shell and nickel sintered powder metal wick. Sodium(Na) was the working fluid for heat pipes A and B; heat pipe C used eutectic sodium-potassium(NaK). Heat pipes B and C included non-condensible gas for rapid start-up. There were fins on the cooling section of heat pipes. In the experiments, an infrared image furnace supplied heat to the heat pipe simulating turbine blade surface conditions. In the results, heat pipe B demonstrated the highest heat flux of 17 to 20 W/cm2. The start-up time was about 6 minutes for heat pipe B and about 16 minutes for heat pipe A. Thus adding non-condensible gas effectively reduced start-up time. Although NaK is a liquid phase at room temperature, the start-up time of heat pipe C (about 7 to 8 minutes) was not shorter than the heat pipe B. The effect of a gravitational force on heat pipe performance was also estimated by inclining the heat pipe at an angle of 90 degrees. There was no significant gravitational dependence on heat transport for heat pipes including non-condensible gas.

Numerical Simulation of a Heat Pipe Embedded Cooling System for a Notebook PC

2003 ◽  
Author(s):  
Yi Jia ◽  
Pablo D. Quinones
Keyword(s):  
Numerical Simulation ◽  
Heat Pipe ◽  
Power Dissipation ◽  
Cooling System ◽  
Heat Pipes ◽  
Element Model ◽  
Uniform Temperature ◽  
Operation Performance ◽  
Back Plate ◽  
Pipe Geometry

A finite element model using the ANSYS® software package was developed to simulate the thermal performance of a novel heat pipe embedded thermal hinge system in a notebook computer. Introducing heat pipes into a notebook PC cooling system on the back spreader plate assists in spreading heat rapidly throughout the entire plate. The effects of the heat pipe geometry and arrangement on the performance of the cooling system were numerically investigated using the model. Various arrangements of miniature heat pipes and a vapor chamber were studied to optimize the cooling system. The numerical simulation results showed that the new system creates an almost uniform temperature distribution in the entire spreader plate, and evenly dissipates the heat load throughout the display’s back plate. The analysis further confirms that incorporating a heat pipe into a spreader plate has the ability to further battle the ever increasing power dissipation demand, which can significantly benefit operation performance of notebook PCs.

scholarly journals Pengaruh Temperatur Double Dan Single Kondensor Cascade Straight Heat Pipe Pendingin CPU

Jurnal METTEK ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 90
Author(s):  
Kadek odik Widiantara ◽  
Wayan Nata Septiadi ◽  
Ketut Astawa
Keyword(s):  
Heat Pipe ◽  
Heat Pipes ◽  
Central Processing Unit ◽  
Processing Unit ◽  
Process Data ◽  
Central Processing ◽  
Cpu Temperature ◽  
Very High

Kebutuhan masyarakat akan komputer sangat tinggi. Komputer dapat diartikan sebagai alat yang dipakai untuk mengolah data menurut prosedur yang telah dirumuskan. Komputer itu sendiri terdiri dari perangkat keras (Hardware) dan perangkat lunak (Software). Salah satu komponen penting dalam komputer ialah Central Processing Unit (CPU) yang merupakan perangkat keras. Kondisi komputer yang dibebani kerja tentunya akan mengakibatkan CPU bekerja lebih keras dan menyebabkan CPU lebih cepat panas. Panas inilah yang dapat mengganggu kinerja dari CPU tersebut, oleh karena itu panas ini harus dibuang. Era sekarang ini, sistem pendinginan untuk CPU mulai mengarah pada penggunaan heat pipe sebagai pendingin. Heat pipe ini dapat mengatasi panas yang ditimbulkan oleh CPU yang nantinya akan membantu mengembalikan performa dari CPU tersebut. Untuk membantu menurunkan temperatur CPU digunakan heat pipe dengan desain single dan double kondensor cascade straight heat pipe. Perlakuan yang diberikan dalam pengujian cascade straight heat pipe dengan pemberian kalor masing-masing besarnya idle 10 (watt), 20 (watt), 30 (watt), 40 (watt) dan maksimal 48 (watt). Dari percobaan yang telah dilakukan menunjukkan hasil yang diberikan oleh cascade straight heat pipe untuk double kondensor menghasilkan temperatur lebih rendah dibandingkan single kondensor dimana temperatur mengalami penurunan sebesar 1,169°C pada pemberian kalor 20 watt, 0,437°C pada pemberian kalor 30 watt, 2,657°C pada pemberian kalor 40 watt dan 3,565°C pada pemberian kalor 48 watt. Computers needs in comunity is very high. Computers can be interpreted as a tool used to process data according to procedures that have been formulated. The computer consists of hardware (Hardware) and software (Software). One important component in a computer is the Central Processing Unit (CPU) which is the hardware. The condition of a computer that is burdened with work will require the CPU to work faster and cause the CPU to heat up faster. The heat must be removed from the CPU, because of the heat that must be removed. In this current era, the system supports CPUs. Starting to use heat pipes as a cooler. This heat pipe can overcome the heat generated by the CPU that is needed will help restore the performance of the CPU. To help reduce CPU temperature, a single and double cascade condenser heat pipe is used. The treatment given in the straight heat pipe cascade test by giving each value is idle 10 (watts), 20 (watts), 30 (watts), 40 (watts) and a maximum of 48 (watts). From the experiments conducted the results given by the straight cascade of heat pipes for multiple condensers produce lower temperatures than single condensers while the temperature requires a decrease of 1.169 ° C for the provision of 20 watts of heat, 0.437 ° C for 30 watt heat assistance, 2.657 ° C at the provision of heat of 40 watts and 3.565 ° C in the provision of heat of 48 watts.

scholarly journals Heat Pipe as a Passive Cooling System Driving New Generation of Nuclear Power Plants

2021 ◽  
pp. 30-38
Author(s):  
Ziba Zibandeh Nezam ◽  
Bahman Zohuri
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Nuclear Power ◽  
Power Plants ◽  
Cooling System ◽  
Heat Pipes ◽  
Passive Cooling ◽  
Nuclear Power Reactor ◽  
Pipe System ◽  
New Generation

The technology of the Heat Pipe (HP) system is very well known for scientists and engineers working in the field of thermal-hydraulic since its invention at Las Alamos Nation Laboratory around the 1960s time frame. It is a passive heat transfer/heat exchanger system that comes in the form of either a constant or variable system without any mechanical built-in moving part. This passive heat transfer system and its augmentation within the core of nuclear power reactors have been proposed in the past few decades. The sodium, potassium, or mercury type heat pipe system using any of these three elements for the cooling system has been considered by many manufacturers of fission reactors and recently fusion reactors particularly Magnetic Confinement Fusion (MCF). Integration of the heat pipes as passive cooling can be seen in a new generation of a nuclear power reactor system that is designed for unconventional application field such as a space-based vehicle for deep space or galaxy exploration, planetary surface-based power plants as well as operation in remote areas on Earth. With the new generation of Small Modular Reactor (SMR) in form of Nuclear Micro Reactors (NMR), this type of fission reactor has integrated Alkali metal heat pipes to a series of Stirling convertors or thermoelectric converters for power generation that would generate anywhere from 13kwt to 3Mwt thermal of power for the energy conversion system.

Experimental Research and Simulation in a Thermosyphon

2012 ◽  
Vol 580 ◽  
pp. 441-444
Author(s):  
K.M. Yang ◽  
N.H. Wang ◽  
C.H. Jiang ◽  
L. Cheng
Keyword(s):  
Heat Pipe ◽  
Cfd Simulation ◽  
Thermal Characteristics ◽  
Heat Pipes ◽  
High Heat ◽  
Evaporation And Condensation ◽  
Maximum Value ◽  
High Heat Transfer ◽  
Adiabatic Section ◽  
Very High

Heat pipes are devices capable of very high heat transfer and have been widely used in many thermal management applications. An experimental investigation and CFD simulation of thermal characteristics of heat pipe was presented in this paper. It can be found that UDF in FLUENT can simulate the evaporation and condensation in heat pipe. The pressure difference between evaporation section and condenser ensure the vapor can flow successfully from the evaporation section to condenser. In steady state, the fluctuation of axial velocity is very small in the most area in heat pipe. In general, the magnitudes of velocity vary from 0 to maximum from the end of both evaporation section and condenser, and the maximum value was maintained in the adiabatic section.

Thermal Analysis of Edge Illumination Type LED Backlight with Heat Pipe

2013 ◽  
Vol 401-403 ◽  
pp. 339-344 ◽  
Author(s):  
Wo Huan Guan ◽  
Yong Tang ◽  
Xin Rui Ding ◽  
Bin Liu ◽  
Long Sheng Lu
Keyword(s):  
Thermal Analysis ◽  
Steady State ◽  
Heat Pipe ◽  
Heat Pipes ◽  
Thermal Characterization ◽  
Temperature Uniformity ◽  
Working Temperature ◽  
Led Backlight ◽  
Led Arrays

This paper reports on thermal characterization of edge illumination type LED backlight integrated with heat pipes. Heat pipe is integrated with the panel by phase change flattening and expanding process. Thermal capabilities, including the steady-state working temperature and the temperature uniformity along the panels with heat pipes and without heat pipes are compared and analyzed. Results show that the steady-state working temperature on the panel with heat pipes is 1~6°C lower than that on the panel without heat pipes under power range of 15W to 51W of the LED arrays. And the temperature uniformity along the panel with heat pipes is controlled within 2.0°C.

scholarly journals Enhancement on the thermal behavior using heat pipe arrays in battery thermal management compared to cooper rods

2020 ◽  
Vol 24 (5 Part B) ◽  
pp. 3329-3336
Author(s):  
Chaoyi Wan
Keyword(s):  
Thermal Behavior ◽  
Heat Pipe ◽  
Thermal Management ◽  
Cooling System ◽  
Heat Pipes ◽  
Input Power ◽  
Maximum Temperature ◽  
Inlet Temperature ◽  
Battery Thermal Management ◽  
Power Battery

In the present study, the thermal behavior of a power battery cooling structure employing copper rods, and heat pipes was compared. The influences of flow rate and inlet temperature of coolant, as well as input power were discussed by numerical methods. The numerical computation results showed that heat pipe could significantly augment the heat transfer of the battery cooling system than the copper rod. Within the scope of this study, the heat pipe reduced the maximum temperature by 41.6-60.9%. The distributions of temperature ratios on the battery surface, together with the heat flux as soon as streamlines around the heat pipe condenser was also illustrated.

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