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Thermoacoustic Refrigeration

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What is Refrigeration ?
Introduction.
Basic principle.
Working.
Description Of Parts.
Advantages & Disadvantages.
Application.
Conclusion.
Reference.

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Thermoacoustic Refrigeration

  1. 1. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS ADVANCEMENT IN REFERIGERATION &ADVANCEMENT IN REFERIGERATION & AIR CONDITIONINGAIR CONDITIONING (THERMOACOUSTICS REFERIGERATION)(THERMOACOUSTICS REFERIGERATION) Title of PresentationTitle of Presentation Mr. KONAL SINGHMr. KONAL SINGH Director and Founder of ProBotiZ Group, NagpurProBotiZ Group, Nagpur
  2. 2. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS OUTLINEOUTLINE What is Refrigeration ? Introduction. Basic principle. Working. Description Of Parts. Advantages & Disadvantages. Application. Conclusion. Reference.
  3. 3. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS WHAT IS REFRIGERATIONWHAT IS REFRIGERATION ?? The process in which work is done by transferring the heat from one location to another as well as from low temperature region and moved to high temperature region is known as Refrigeration.
  4. 4. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS INTRODUCTIONINTRODUCTION (THERMOACOUSTICS REFRIGERATION)(THERMOACOUSTICS REFRIGERATION) HCFCS and CFCS, these chemicals are responsible for depletion of stratospheric ozone layer. Thermoacoustic refrigeration, an emerging “Green” technology. Environmental Friendly Refrigerator are used (usually Argon & helium gases). This System works on the Thermodynamics & Acoustics theory. It works on the principle of reversed Carnot cycle.
  5. 5. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS INTRODUCTIONINTRODUCTION Cont.Cont. (THERMOACOUSTICS REFRIGERATION)(THERMOACOUSTICS REFRIGERATION) This is based on the principle that sound waves are pressure waves. Thermoacoustic refrigeration has the potential to replace conventional refrigeration. It also has a broad range of application, including computers and nanotechnology. It will likely be employed by military and space.
  6. 6. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS HISTORY OFHISTORY OF (THERMOACOUSTICS REFRIGERATION)(THERMOACOUSTICS REFRIGERATION) Nikolaus Rott & Lord Rayleigh. In 1980, first experiment conducting in LANL. In 2004, PSU scientist developed working refrigerator. Emerging Green Technology based upon high pressure sound wave. Alternative cooling system. Ecofriendly with nature.
  7. 7. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS Thermoacoustics is based on the principle that sound waves are pressure waves They propagate causing compressions and rarefactions in the medium. Molecule causes constructive & destructive interference. Temperature changes due to the adiabatic compression & expansion. PRINCIPLE OFPRINCIPLE OF (THERMOACOUSTICS REFRIGERATION)(THERMOACOUSTICS REFRIGERATION)
  8. 8. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS PRINCIPLE OF THERMODYNAMICPRINCIPLE OF THERMODYNAMIC ContCont.. (THERMOACOUSTICS REFRIGERATION)(THERMOACOUSTICS REFRIGERATION) TEMPERATURE OF FLUID RISES WHEN COMPRESSED AND DECREASES WHEN EXPANDED - When a gas is compressed, work is done on the gas molecules. That means that additional energy is transferred to the gas molecules from the source of compression so as to increase temperature of gas and vice-a- versa. HEAT FLOWS FROM HIGHER TEMPERATURE REGION TO LOWER TEMPERATURE REGION-- When two substances are placed in direct contact, heat will flow from the hotter substance to the cooler one unless both the bodies attain equal temperatures.
  9. 9. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS PRINCIPLE OF THERMODYNAMICPRINCIPLE OF THERMODYNAMIC (THERMOACOUSTICS REFRIGERATION)(THERMOACOUSTICS REFRIGERATION)
  10. 10. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS This system is work on the thermodynamic & acoustics theory. It works on the principle of reversed Carnot Cycle. CYCLE FOR TARCYCLE FOR TAR
  11. 11. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS CYCLE FOR TARCYCLE FOR TAR Cont.Cont. Process 1-2 – Compressed isentropically Process 2-3 – Compressed isothermally Process 3-4 – Expanded isentropically Process 4-1 – Expanded isothermally (COP)Carnotrefrigerator = T1/T2-T1
  12. 12. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS WORKING OFWORKING OF (THERMOACOUSTIC REFERIGERATOR)(THERMOACOUSTIC REFERIGERATOR)
  13. 13. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS CLASSIFICATIONCLASSIFICATION Travelling Wave Thermo acoustics Refrigeration Standing Wave Thermo acoustic Refrigeration.
  14. 14. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS TRAVELING WAVE THERMOACOUSTICSTRAVELING WAVE THERMOACOUSTICS REFERIGERATION SYSTEMREFERIGERATION SYSTEM Composed of an acoustic driver. An acoustic resonator and a structure with narrow flow channels called regenerator. Works through the thermal imperfect contact between the working gas and the regenerator.
  15. 15. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS STANDING WAVE THERMOACOUSTIC REFERIGERATION SYSTEM The conventionally used acoustic resonator consists on a straight tube with two closed ends . The acoustic wave excited in the refrigerator is a standing wave.
  16. 16. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS DESCRIPTION OF PARTSDESCRIPTION OF PARTS Cont.Cont. DRIVER RESONATOR It‘s supply to sufficient acoustics Pressure To store acoustic energy & obtain Proper phasing of pressure & velocity
  17. 17. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS DESCRIPTION OF PARTSDESCRIPTION OF PARTS STACK HEAT EXCHANGER To convert acoustic pressure oscillation into temperature gradient Transfer heat into or out of a system
  18. 18. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS ADVANTAGESADVANTAGES Harmful chemicals like CFC’s, HFC’s, and HCFC’s are not released into atmosphere. As the working fluid is an inert gas there is no toxicity, flammability, or negative environmental effects. It is more reliable as there are few moving parts. Mechanically Simple Relatively Compact and Light in weight
  19. 19. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS DISADVANTAGESDISADVANTAGES COP is less when compared with the present refrigerating systems. Component of these systems is very costly.
  20. 20. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS APPLICATION & FUTURE SCOPEAPPLICATION & FUTURE SCOPE APPLICATION :- Ben and Jerry’s Ice Cream. Future scope :- Domestic food refrigerators & freezers. Liquefaction of natural gasses & space craft. Automobile sector are use for the refrigerator. Thermoacoustic cooling are also use for computer application & electronic industry. Niche industry.
  21. 21. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS WHY STILL NOT COMMERCIALISEDWHY STILL NOT COMMERCIALISED ?? MANY SCIENTISTS WORKING ON IT BELIEVE THAT IF IT IS DEVELOPED IN THE BEST POSSIBLE MANNER IT CAN ACHIEVE THE MAXIMUM EFFICIENCY OF CARNOT CYCLE BUT IT HAS STILL NOT BEEN COMMERCIALISED BECAUSE- Less efficiency than domestic refrigerator. Talent bottleneck in the field of thermoacoustic refrigeration Lack of suppliers producing customized components Lack of interest and funding from industry
  22. 22. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS Thermoacoustic refrigeration is an innovative alternative for cooling that is both clean and inexpensive. The refrigeration effect is achieved by using sound waves and an inert gas which will not cause any damage to the atmosphere(i.e. ecofriendly). Thermoacoustic refrigerators use acoustic waves to transfer heat. CONCLUSIONCONCLUSION
  23. 23. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS Their benefits compared with their vapor-compression counterparts are environmental friendliness, robustness and simplicity, they are currently still less efficient than traditional vapor-compression refrigerators. CONCLUSIONCONCLUSION Cont.Cont.
  24. 24. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS REFERENCESREFERENCES www.egr.msu.edu . www.msss.com. www.mecheng.adelaide.edu.au . Hatazawa, M., Sugita, H., Ogawa, T. and Seo, Y., “Performance of a thermoacoustic sound wave generator driven with waste heat of automobile gasoline engine.” Trans. Japan Soc. Mech. Eng. 70. 292-299, 2004. Thermoacoustic Refrigerator for Space Applications S. L. Garrett, J. A. Adeff, T. J. Hofler Reprinted from Journal of Thernmophysits Volume 7, Number 4, October-December 1993, Pages 595-599.
  25. 25. T M T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS ANYANY
  26. 26. T M CONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTSCONTACT FOR -CONTACT FOR - WORKSHOP, TRAINING & PROJECTS

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