Fabrication ofInstant Icemaker

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PAPER PRESENTATION ON TOPIC FABRICATION OF INSTANT ICE MAKER Guided By Prof. Lenin Dhale Presented By: Mr. Amit Kayarkar Mr. Atul Mandale Mr. Bhaskar Sharma Mr. Hitesh Kotkar Mr. Pritam Daware

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INTRODUCTION Enhanced demand for ice trade after 19 th century Multiple applications of ice In general ,various ice plants or refrigerating units uses ammonia (NH 3 ) and Dichlorodifluoromethane (R-12) as a primary refrigerant and brine as a secondary refrigerant . In this project we are going to use tetrafluoroethane ( R-134a ) as a primary refrigerant and Ethylene glycol (R22R36) as a secondary & water cooled condenser.

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LITERATURE REVIEW P roper secondary refrigerant selection and system design, the secondary loop refrigeration system could provide better performance to existing systems(1) I ce factory makes an ice of 12tones in 48 hours by using conventional process This time period is very long so to overcome this the COP of the plant can be improved by the generator temperature(3).

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Instant ice can also be made by replacing the secondary refrigerant brine with ethylene glycol(6). Conventionally used bring was corrosive to steel and copper so there was always a search for better secondary refrigerant and this search can be ended by using Ethylene Glycol(6) As per one survey conducted; it is estimated that out of total electrical energy produced 15% goes to refrigeration so if we increase the production period we would minimize the consumption of electricity(4)

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1 FABRICATION SETUP 1.1 COMPONENTS OF ICE MAKER MODEL 1.1.1COMPRESSOR 1.1.2.CONDENSOR 1.1.3.RECEIVER 1.1.4.EXPANSION DEVICE 1.1.5.EVAPORATOR 1.1.6.CHILLING TANK

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1.1.1 COMPRESSOR Function- The functionis to increase the temperature and pressure of R134-a vapour coming out from evaporator. Classfication of Air Compressor :

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Fig.1.1.1: Small hermetically sealed compressor unit since Type of compressor used in model -Hermitically sealed reciprocating compressor which has one-piece welded steel casing

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1.1.2 CONDENSER Function -It liquefies the high pressure and high temperature R-134a to high pressure and low temperature R-134a Classification of Compressor

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Type of Condenser use in the model – Forced air cooled condenser Fig.1.2.1: Forced air cool condenser

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1.1.3 RECEIVER Function- It is use to collect the liquid R134-a from the condenser . A receiver requires a minimum operating charge which adds to overall charge and cost, and also increases system complexity. Hence receivers are avoided on many smaller systems.

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1.1.4 EXPANSION DEVICE Function- Reduce the high pressure liquid refrigerant to low pressure liquid refrigerant before being fed to the evaporator. Type of Expansion device used in model - Capillary tube expansion device. It is a coper tube of small diameter It is installed in the liquid line between the condenser and evaporator

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1.1.5 EVAPORATOR FUNCTION : The function of the evaporator is to absorb heat from the surrounding location or medium which is to be cooled, by mean of a refrigerant. . Fig 1.5.1 Copper Evaporator

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The evaporator becomes cold and remains cold due to the following two reasons: The temperature of the evaporation coil is low due to the low temperature of the refrigerant inside the coil. The low temperature of the refrigerant remains unchanged because any heat it absorbs is converted to latent heat as boiling proceeds.

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1.1.6 CHILLING TANK FUNCTION : It is made of wood ,concrete or steel but mostly concrete This Tank consist of : Secondary refrigerant Ethylene Glycol Expansion coils Ice cans Has good insulation

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2 LINE DIGRAM OF INSTANT ICE MAKER Fig 2.1 Line digram

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2.1 WORKING OF INSTANT ICE MAKER Secondary refrigerant directly absorb heat from water which is placed in ice can . The liquid primary refrigerant (R134a) absorb heat from secondary refrigerant (ethylene glycol) which is circulated around refrigerated space in evaporator. Due to absorbing of latent heat from secondary refrigerant, primary refrigerant convert in vapour state and flow towards Harmatically sealed compressor.

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Compressor compress the primary refrigerant at high pressure and temperature and passes to the condenser. Condenser condensed the vapour of primary refrigerant into liquid form with the help of air cooling system. Condenser passes that refrigerant to the receiver and stored it in receiver. Then receiver often passes that refrigerant to the evaporator through expansion valve. This process keeps on recirculating

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3 APPLICATIONS In automobile In textile industries In industrial Application where instant cooling required. Fisheries Chemical Pharmaceutical Commercially used in different industrial applications

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4 REFRIGERANTS USED IN MODE L Primary Refrigerant- R134-a IUPAC name - 1,1,1,2-Tetrafluoroethane Formula: CH 2 FCF 3 Secondary Refrigerant -Conventionally Brine Solution replaced by Ethylene Glycol IUPAC name-Ethane-1,2-diol Formula- C2 H6O2

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Reasons for using ethylene glycol It is non-corrosive to copper and steel. It is suitable even below -20 ˚C Properties of ethylene glycol Molar mass 62.068 g/m3)          Density U132g/cm 3 Melting point-12.9 °C (260 K)  Boiling point 197.3 °C (470 K)

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5 ADVANTAGES OF OUR PROJECT By using R-134a as a primary refrigerant condenser size should be reduced Water required for the condense is less as compared to use in conventional ice plant. Ice can be manufacture in shorter time Less effect on environment when primary refrigerant is leak . Hot water obtained in hot chamber can be used for various purpose like for removing of ice from ice cans etc.

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6 LIMITATIONS Ethylene glycol is toxic. Ethylene glycol affects the human skin . 7 WORK PERFORMED TILL NOW Modulated the prototype of the instant ice paper Collected data of secondary refrigerant

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8 WORK TO BE PERFORMED IN FUTURE Fabrication of the instant ice maker Calculation of the COP

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9 FUTURE SCOPE OF THE PROJECT 1)There is a provision for different accessories to measure the various system parameters so as to make the system more sophisticated . 2) The system can be made sophisticated to check the performance of alternative refrigerant so that it can be used as a research attachment module . 3) There is a provision of better insulation to achieve a higher heat transfer rate and to reduce losses so as to achieve a higher performance rate

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10 REFERENCES S.W. Inlow , E.A.Groll “A Performance Comparison of Secondary Refrigerants” 2) J.P.Yadav and Bharat Raj Singh “A study and analysis of Fabrication of Ice plant model” 3) Sukani Sunny,Alpesh Rabadiya,Hatesh Deasai (S.T.B.S Surat ) “ Improve C.O.P of Ice making Plant with out editing any additional system” International journal on modern Engineering Research 4)Prof. R.S.Bhatt , Siddharth Raghavan “Solar energy assisted ice plant” National Conference on Recent Trends in Engineering and Technology

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5) Recent development in Simulation techniques for vapour -compression refrigeration systems ” 6) Experimentation for Design and Fabrication of Scaled Down innoviative mini Ice plant 6) http ://en.wikipedia.org/wiki/Icemaker 7) http ://www.icemakerchina.cn 8) Refrgeration and Air conditioning Author: Arora Puublication : MCGrawill

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conclusion

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