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Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
Nano technology cooling full ppt
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Nano technology cooling full ppt

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This technique works by generating ions or electrically …

This technique works by generating ions or electrically
charged atoms using electrodes placed close to one
another on a computer chip. Generated ions are passed
from electrode to electrode, with collisions between ions
and neutral air atoms propelling the air forward in what is
called the corona wind effect – the process that cools.

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  • 1. NANONANO TECHNOLOGYTECHNOLOGY COOLINGCOOLING GIRIJA SANKAR DASHGIRIJA SANKAR DASH EMBETICS SOLUTIONSEMBETICS SOLUTIONS
  • 2. OVERVIEW • INTRODUCTION • CAUSES OF HEAT GENERATION • POPULAR COOLING TECHNIQUES – PASSIVE HEAT-SINK COOLING – ACTIVE HEAT-SINK COOLING – WATER COOLING – HEAT PIPE • NANOTECHNOLOGY • COOLING METHODOLOGY USING NANOTUBES • ADVANTAGES OF SELF COOLING • FUTURE DEVELOPMENTS • CONCLUSION
  • 3. INTRODUCTION This technique works by generating ions or electrically charged atoms using electrodes placed close to one another on a computer chip. Generated ions are passed from electrode to electrode, with collisions between ions and neutral air atoms propelling the air forward in what is called the corona wind effect – the process that cools.
  • 4. CAUSES OF HEAT GENERATION •The amount of heat generated by an integrated circuit is the prime cause of heat build up in modern computers, is a function of the efficiency of its design, the technology used in its construction and the frequency and voltage at which it operates.
  • 5. Popular Cooling techniques • PASSIVE HEAT-SINK COOLING • ACTIVE HEAT-SINK COOLING • WATER COOLING • HEAT PIPE
  • 6. PASSIVE HEAT-SINK COOLING • Passive heat-sink cooling involves attaching a block of machined to the part that needs cooling. More commonly for a personal-computer CPU, a clamp holds the heat sink directly over the chip, with a thermal grease or thermal pad spread between.
  • 7. ACTIVE HEAT-SINK COOLING • Active heat-sink cooling uses the same principle as passive, with the addition of a fan that blows over or through the heat sink. The air movement increases the rate at which the heat sink can exchange heat with the ambient air.
  • 8. WATER COOLING • Water cooling include the fact that a system is not limited to cooling one component, but can be set up to cool the central processing unit, graphics processing unit, and/or other components at the same time with the same system.
  • 9. HEAT PIPE • A heat pipe is a hollow tube containing a heat transfer liquid. As the liquid evaporates, it carries heat to the cool end, where it condenses and then returns to the hot end. Heat pipes thus have a much higher effective thermal conductivity.
  • 10. NANOTECHNOLOGY Nanotechnology is a branch of engineering that deals with the design and manufacture of extremely small electronic circuits and mechanical devices built at the molecular level of matter.
  • 11. COOLING METHODOLOGY USING NANOTUBES • Carbon nanotube electrodes placed close to one another on a computer chip and voltage is passed into the electrodes. • When voltage is passed into the electrodes the negatively charged nanotubes discharge electrons towards the positively charged electrodes. • The electrons react with surrounding air, causing the air molecules to be ionized just as electrons in the atmosphere ionize air in clouds. • This ionization of air leads to an imbalance of charges that eventually result in lightning bolts. • To create lightning we need tens of kilovolts, but we do it with 100 volts or less, in simple term, we are generating lighting on a nano-scale here.
  • 12. • The researchers are able to create the ionizing effect with low voltage because the tips of the nanotubes are extremely narrow and the oppositely charged electrodes are spaced apart only about 10 microns, or one – tenth the width of human hair. • The ionized air molecules cause currents like those created by the “corona wind” phenomenon, which happens between electrodes at voltages higher than 10 kilovolts, or 10,000 volts. • Clouds of ions created when electrons react with air can then be attracted by the second region of electrodes and pumped forward by changing the voltages in those electrodes. COOLING METHODOLOGY USING NANOTUBES
  • 13. • The voltages are rapidly switched from one electrode to the next in such a way that the clouds of ions move forward. • As the ions move forward, they make repeated collisions with neutral molecules, producing the breeze. • Voltages are switched at the right frequency so that the ion cloud is constantly moving forward causing the breeze to flow. • The pumping concept works with a region of electrodes made of many series, each series containing three electrodes. • The first in the series is the most positively charged, followed by an electrode that has a less – positive charge and then a third electrode that is negative. COOLING METHODOLOGY USING NANOTUBES
  • 14. • Switching the voltages from one electrode to the next causes the charges to move forward, which in turn moves the ion clouds. • Generated ions are passed from electrode to electrode, in the mode of a charge – coupled device, with collisions between ions and neutral air atoms propelling the air forward in what is called the corona wind effect • The researchers nano sized the corona wind effect and combined it with micro fluidic channels with embedded, megahertz – sequenced electrodes to create suitable for pumping heat – laden air molecules literally through the core of a chip and out the other side. COOLING METHODOLOGY USING NANOTUBES
  • 15. ADVANTAGES OF SELF COOLING • Additional cost for providing external cooling (coolers, air – conditioner etc) can be eliminated. • Size of computers will be smaller in near future compared to those used at present. • No moving parts inside the computer, hence there will be more reliable and noiseless. • Self – cooling of chips will increase the life expectancy of the chips and hence increase the life of appliance. • Additional and more advanced circuitry can be designed and fabricated within a single chip.
  • 16. CARBON NANORIBBONS FOR SMALLER, SPEEDIER COMPUTER CHIPS Stanford chemists have developed a new way to make transistors out of carbon nanoribbons. A schematic of graphene nanoribbon field-effect transistor
  • 17. FUTURE DEVELOPMENTS • Silicon Nanowires Upgrade Data-Storage Technology • Integrated Nanowire Sensor Circuitry
  • 18. CONCLUSION • Nanotechnology is used in computers for improving its efficiency. The nanowires, nano cooling techniques provides with high reliability, increased performance efficiency. It finds applications in laptop computers, cell phones, sensing systems and many other types of portable microelectronics. It will also let us to fabricate an entire new generation of products that are cleaner ,stronger, lighter and more precise.

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