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Lpg refrigerator.

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Lpg refrigerator.

  1. 1. DEPARTMENT OF MECHANICAL ENGINEERING GANDHI ENGINEERING COLLEGE, BHUBANESWAR Submitted By: MEMBERS NAME :-  RAMSHANKAR SINGH ASHISH KUMAR  DIWAKAR SHARMA SWAPNIL SOURAV  SUBODH THAKUR PREMPRAKASH MUNDU  BIPIN KUMAR CHAURASIA PRAKASH ANAND  PAPPU KUMAR MEHTA ANIKET DAS Guided By- Asst. Prof. SUBHASISH DAS
  2. 2. CONTENTS  ABSTRACT  INTRODUCTION  WORKING PRINCIPLE  COMPONENTS  SPECIFICATION OF COMPONENTS  COST SHEET  RESULT  ADVANTAGE AND DISADVANTAGES  APPILICATION  CONCLUSION.  REFERENCE
  3. 3. ABSTRACT  Supply of continuous electricity is still not available in several areas of the country and in the world where the refrigeration of Food and Medicines can be preserved.  LPG comprises of 24.4% propane(C3H8)(R-290), 56.4% butane (C4H10)(R-600) and 17.2% isobutene which have very low boiling point (lower than 0 0C).  The LPG is cheaper and possesses an environmental friendly nature with no ozone depletion potential (ODP).  The combustion products of LPG are CO2 and H2O. The evaporator temperature reached -10 ºC.  From experiment the COP of a refrigerator is 2.25 .
  4. 4. INTRODUCTION  In India, more than 80% of the domestic refrigerator utilize HFC 134a as refrigerant, due to its excellent thermodynamic and thermo physical properties.  But, HFC 134a has a high global warming potential (GWP) of 1300.  Hydrocarbon refrigerants; particularly LPG serves as the best contender to replace HFC’s from domestic refrigerator as well as car air conditioners.  As we know According to second law of thermodynamics, Heat is virtually being pumped from a lower temperature to a higher temperature by adding some of external work.
  5. 5. NEED TO INVENT  Today world is facing the major problems regarding energy crisis.  Along with this we are facing major environmental trouble due to increase in harmful gases which are evolved from nowhere else but the combustion of these conventional energy sources.  Pollution is minimized by LPG .  And cost is minimized by LPG Refrigeration system.
  6. 6. WORKING LPG REFRIGERATOR  The basic idea behind LPG refrigeration is to use the evaporation of a LPG to absorb heat.  LPG is stored in the LPG cylinder under high pressure When the gas tank of regulators is opened then high pressure LPG passes in gas pipe. This LPG is going by high pressure gas pipe in capillary tube.  It works on the principle that during the extraction of heat the LPG expanded there is a pressure drop and increase in volume of LPG that results in the drop of temperature and a cooling effect.
  7. 7. Components of lpg refrigeration system 1.LPG Gas Cylinder:  From the LPG gas cylinder, LPG flows through the pipe and reaches to the capillary tube. LPG gas pressure is approximate 12-18 bar. 2.Capillary Tube: As the capillary tube, capillary tube downs the pressure up to less than 1.4bar its diameter 3mm.
  8. 8. 3.Evaporator: The evaporator is an important part of the refrigeration system, which produces the cooling effect in the vapour form at low pressure and temperature.
  9. 9. 4.Pressure gauges:  Many techniques have been developed for the measurement of pressure and vacuums. Instruments used to measure pressure are called pressure gauges or vacuum gauges.  These gauges are available in 63mm, 100mm, and 150mm sizes .
  10. 10. 5.High Pressure pipes  The range of high pressure pipes covers most application where there is a requirement to transfer gas at high pressure. They consist of a steel pipe with a steel ball fitted to both ends.  All pipes are pressure tested to 100 MPa (200 psi) over recommended working pressure
  11. 11. Specification of Component  Refrigeration Box: L-540, W-400, H-650, T-50  Evaporator Box: L-360, W-240, H-150  Capillary Tube: L-2700, D-0.31  Accumulator: D-25  Box Stand: L-920, W-400, H-530  Pressure Gauge: 0 to 250psi
  12. 12. To Be Continued……  Filter: D-44.5, H-60  Regulator: D-4  Discharge Pipe: L-2430, D-14.5  Suction Pipe: L-1820, D-14.5 ( L-Length, W-Width, H-Height, t-Thickness, D-Diameter ) * All dimension in mm.
  13. 13. OTHER PROPERTIES Colorless. Flammable. Heavier than air. Approximately half the weight of water.  Non toxic but can cause asphyxiation.  LPG expands upon release and 1 liters of liquid will form approximately 250 liters of vapour
  14. 14. PROPERTIES OF LPG REFRIGERANT  Boiling point:  Combustion:  Vapour pressure  Ignition Temperature  Calorific value  Toxicity:
  15. 15. Boiling Point: LPG’s boiling point ranges from -42 ºC to 0 ºC depending on its mixture percentage of Butane and Propane Combustion: The combustion of LPG produces carbon dioxide (CO2) and water vapour but sufficient air must be available. Ignition temperature: The temperature required to ignite LPG in air is around 500ºC.
  16. 16. Vapor pressure: LPG is a stored as a liquid under pressure. It is almost colorless and its weight is approximately half that of an equivalent volume of water. The pressure inside a closed container in which LPG is stored is equal to the vapor pressure of the liquid and corresponds to its temperature. Calorific value The calorific value of LPG is about 2.5 times higher than that of main gas so more heat is produced from the same volume of gas.
  17. 17. Toxicity: LPG is a colorless, odorless and nontoxic gas. It is supplied commercially with an added odorant to assist detection . Safety: LPG is just as safe as any other fuel. In fact, it is safer than most fuels because neither LPG itself nor the end products that are produced by burning LPG in a suitable appliance are poisonous to inhale.
  18. 18. COST SHEET NO. COMPONENT PRICE  1 REFRIGERATOR BOX 3000  2 EVAPORATER BOX 2500  3 GAS PIPE 400  4 CAPILLARY TUBE 270  5 ACCUMULATOR 350  6 BURNNER 1000  7 BASE STAND 2000  8 INSULATOR THERMOCOL 800  9 RUBBER GASKET MAGNET 400  10 HANDLE CLAMP 160  11 DOOR HINGES (LOWER &UPPER) 100  12 BRAZING MATERIAL 150  13 SUCTION PIPE 600  14 C U ‘T’ CONNECTOR 200
  19. 19. To Be Continued…… NO. COMPONENTS PRICE  15 BRASS NUT 200  16 FILTER 600  17 HAND SUT VALVE 450  18 PRESSURE GAUGE 700  19 STRAIGHT CONNECTOR 80  20 BASE PLATE 200  21 TEMP.SENSOR 200  22 SELF 10  23 SCREW, NUT,BOLT 50  24 BRAZING GAS CYLINDER 150  25 HIGH PRESSURE VALVE 350  26 PIPE CLAMP 60  27 GAS COST 800
  20. 20. ADVANTAGE  It eliminates the blocking problem.  It is efficient to save fuel.  Low Weight.  The fridge works when electricity off. It is efficient to save fuel.  No Pollution.  Running cost is zero.  Eliminates the compressor and condenser.  Noiseless
  21. 21. DISADVANTAGES LPG is explosive in nature. Do not maintain constant pressure in LPG cylinder. Put the LPG cylinder is inverted position. After the refrigeration processes, the exhaust of LPG is burn into burner. Because of the exhausted vapour LPG can not converted again liquid phase , because the this process is very costly. The prevention of leakage of the LPG is the major problem in LPG refrigeration system. Because of the LPG is highly flammable.
  22. 22. APPILICATION  Food processing, preservation and distribution  1. Storage  2. Fish  3. Meat and Poultry  4. Dairy Products (a). Ice cream (b). Butter (c). Cheese (d). Butter milk  5. Beverage  6. Candy  7. Medical
  23. 23. CONCLUSION  The aim of the LPG refrigerator was to use LPG as a refrigerant and utilizing the energy of the high pressure LPG cylinder for producing the refrigerating effect. We also conclude that, we are trying to burn the exhaust LPG, the pressure of exhaust gas is less than 10 PSI, so that the flame produce by the burner is spreading outside.  This system most suitable for hotel, industries, refinery, chemical industries where consumption of LPG is very high. We are continuing this project with some fabrication work and we have collected various equipment’s which is required for this project like high pressure pipes, regulator valve, and capillary tube.  We are going to analyse the experimental details of LPG refrigerator, in the major project.
  24. 24. Results:  The final temperature achieved is about 7.4 degree c.  The average mass flow rate is determined to be 0.000056kg/sec.  The cop is obtained to be 2.25.
  25. 25. REFERENCE  www.google.co.in  www.contest.techbriefs.com/2013/sustainable- technologies/3792  www.sciencedirect.com/science/article/pii/s1359431105004163  www.researchgate.net/publication/222674150_experimental_e valution_of_a_demostic_refrigerator_working_with_LPG  www.projecttopics.info/Mechanical/LPG-Refrigerato.php  C.P. ARORA, “Hand book of Refrigeration and air conditioning”, by page no. 425  “PCRA energy audit report”, HPCL LPG bottling plant Asauda Bahadurgarh (Haryana) Dec. 2006.
  26. 26. THANK YOU…..

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