Advantages of using Vapor – Absorption Refrigeration System • As there is no moving part in the entire system, the operation is essentially quite and subjected to a very little wear. Next . Change ), You are commenting using your Facebook account. Q. The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft (a) 1/2 (b) 1 (c) 2 (d) 4 (e) 8. (b) the cooling effect produced by melting 1 ton of ice (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. Solar energy based refrigeration systems are developed to: Q. Q. Evaporative cooling systems are ideal for: Q. C. Evaporation An Amount Of Water At Low Pressure. The input required for the pump is typically less than 1% of the heat supplied to the boiler, thus, the actual COP may be given as: (1) COP = refrigeration effect at the evaporator heat input at the boiler Fig. 38. A.Induced steam jet draught c) High pressure, motive steam. Hence a considerable drop in air temperature is obtained, and more steam associated with air is condensed resulting in reducing both steam lost and vacuum pump power. Thermoelectric Refrigeration Systems: Thermoelectric cooling uses the Peltier effect to create a heat flux between the junctions of two different types of materials. The performance of the refrigeration system is expressed as C.O.P. Q. One ton of the refrigeration is (A) The standard unit used in refrigeration problems (B) The cooling effect produced by melting 1 ton of ice (C) The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (D) The refrigeration effect to produce 1 ton of ice at NTP conditions While the vapour from the final effect enters in the vapour condenser where cooling water is circulated to … Ans. The materials used in thermoelectric refrigeration systems should have: a) High electrical and thermal conductivity, b) High electrical conductivity and low thermal conductivity, c) Low electrical conductivity and high thermal conductivity. Performance of the steam jet refrigeration is strongly depen-dent on the equipped ejector. If this can be achieved, conventional solar flat plate or evacuated tube water heaters can be used to power a steam jet ejector to produce refrigeration or cooling. Figure 3.66 presents agreement in principle on the steam refrigeration cooling water systems. ( Log Out /  Co-efficient of Performance (C.O.P.) out cooling applications reducing the use of electrical energy. Engines - Measurements & Testing, Performance Parameters & Characteristics, Thermodynamics - Basics and Laws of Thermodynamics. Ans: c. 65. The units of _____ and COP are the same. Since Top 250 I.C. The performance of the refrigeration system is expressed as C.O.P. The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is (a) same (b) more (c) less d) Both mechanical and thermal energy. The aim of this research is to investigate the possibility to run a steam jet ejector on boiler temperatures below 100 °C. Mainly by cooling the material on fire. ... Thermoelectric refrigeration (vi) Steam jet refrigeration system. C. Chimney draught. Although superheating adds more energy to the steam in the form of heat there is no effect on pressure, which is determined by the rate at which steam is drawn from the boiler and the pressure settings of the safety valves. 1. Create a free website or blog at WordPress.com. (2014) [7] has presented an ejector the effects of the geometries of mixing chamber on the model to determine the optimum performance as well as performance of steam ejectors used for multi-effect design area ratio of an ejector in a refrigeration system. Modifying the steam plant condenser by incorporating a vapor compression refrigeration system, which is utilized to chill the water used for cooling the condenser air cooler, is proposed in this work. 1. In the evaporator of a vapour compression refrigeration system: a) A low temperature is maintained so that heat can flow from the external fluid, b) Refrigeration effect is produced as the refrigerant liquid vaporizes, c) A low pressure is maintained so that the compressor can run. B. Cooling An Amount Of Water At Low Pressure. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Tagged: Air conditioning, RAC, Refrigeration. A steam jet refrigeration system can operate steadily at boiler temperature of 90 °C. This effect is commonly used in camping and portable coolers and for cooling electronic components and small instruments. Ans: c Figure 1. Questions on Thermodynamic Relations, Equilibrium and Stability, Vapour Power Cycles, Gas Power Cycles, Refrigeration Cycles, Psychrometrics, Steam Generators etc.1 mark is awarded for each correct answer and 0.25 mark will … Q. Next . Thermoelectric Refrigeration: An Introduction Thermoelectric cooling uses the Peltier effect to create a heat flux between the junctions of two different types of materials. Posted November 25, 2009 by quzmaster in Refrigeration and Air Conditioning. 1. Undercooling of the liquid is generally along the constant pressure line. All Rights Reserved. ... His setup allowed producing a refrigeration effect by utilizing low-grade energy. B.Decreses Your Comments. Change ), You are commenting using your Twitter account. 4 show typical performance curves of a steam jet refrigeration cycle , . distillation systems. 3, Fig. Water is more suitable against fire in wood, paper and textiles. A waste heat recovery unit (WHRU) is an energy recovery heat exchanger that transfers heat from process outputs at high temperature to another part of the process for some purpose, usually increased efficiency. This is the Multiple Choice Questions Part 7 of the Series in Machine Design as one of the Mechanical Engineering topic. Leave a Comment. ( Log Out /  In the past, a small-scale steam jet was studied experimentally. d) All of the above. c) Q. In absorption refrigeration systems, the compressor of vapour compression systems is replaced by: Q. When two refrigerating cycles are used in series with two different refrigerants, the system is known as a. dual refrigeration system Q. Steam- Jet Refrigeration System. Refrigerants - MCQs with Answers Q1. D. Remain same View Answer. Super heating in a refrigeration … Effect of Under Cooling or Sub-Cooling on Vapour Compression System: Undercooling or sub-cooling of the liquid takes place when the liquid is cooled below the saturation temperature corresponding to condenser pressure, before admitted to the throttle valve or expansion valve. An injector is a system of ducting and nozzles used to direct the flow of a high-pressure fluid in such a way that a lower pressure fluid is entrained in the jet and carried through a duct to a region of higher pressure. An air conditioning system employs a refrigeration system to: a) Cool and dehumidify air supplied to the conditioned space, b) To heat and humidify the air supplied to the conditioned space, c) To circulate the air through the system. The Air Jet Refrigeration is based on the Bernoulli’s equation across a streamline. Change ), You are commenting using your Google account. Identify various natural and artificial methods of refrigeration 2. 12/27/2013 The basic working principle of cooling tower is to cool the hot water with the help of atmospheric air. which is the ratio of refrigerating effect produced to the work of compression. The Air Jet Refrigeration is based on the Bernoulli’s equation across a streamline. From the thermodynamic standpoint, water is a very good refrigerant since it has a high latent heat of evaporation and it is cheap, nontoxic, nonflammable, and available in unlimited quantities. MCQ in Machine Design Part 7 as part of the coverage of Mechanical Engineering Board Exam ... Arc produced by two tungsten electrodes into which a jet of hydrogen is directed. One ton of the refrigeration is (A) The standard unit used in refrigeration problems (B) The cooling effect produced by melting 1 ton of ice (C) The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (D) The refrigeration effect to produce 1 ton of ice at NTP conditions Forced steam jet draught. The extinguishing effect of the foam is a combination of smothering and cooling. Conclusions The prototype steam jet refrigeration cycle driven by low-grade thermal energy is developed for testing at actual ambient condition in Thailand where the cooling water produced by cooling tower is between 29 and 33°C. Induced steam jet draught. The height of the cooling tower in thermal power plant is about 9 feet or above from the ground level. D. None of the above View Answer. This test comprises of 50 questions on Thermodynamics. A portion of the SLIC steam supply is directed to the steam-jet ejector where it creates a suction effect pulling the B. In simple, refrigeration means the cooling of or removal of heat from a system. Ans: e 89. Introduction. For the same draught produced the power of induced draught fan as compared to forced draught fan is (a) less (b) more (c) same (d) not predictable. In Steam Jet Refrigeration, Cooling Effect Is Produced By A. Cooling An Amount Of Water At High Pressure. Steam jet draught. In gas cycles, heat rejection and refrigeration take place as the gas undergoes sensible cooling and heating. Q: Which of the following can be called as a refrigeration process? 14.1.4. © Copyright 2016. e. Steam and vapor jet refrigeration systems (Section 1.3.5) f. Thermoelectric refrigeration systems (Section 1.3.6), and g. Vortex tubes (Section 1.3.7) At the end of the lesson the student should be able to: 1. Change ). D. Boiling An Amount Of Water At High Pressure. filling blanks-refrigeration; interview short question answers-conduction-3; boot strap and reduced ambient aircraft cooling systems; close coiled helical spring -axial torque; mcq … Ans. D. Remain same View Answer. In steam jet refrigeration systems, water can be used as the refrigerant. Analyze air refrigeration systems, vapor compression refrigeration systems, vapour absorption refrigeration systems, and steam jet refrigeration systems 3. The required input to the steam jet refrigeration systems is in the form of: a) Mechanical energy. Does not effect. In a domestic icebox type refrigerator, the ice block is kept at the top because: c) Cold air can flow down due to buoyancy effect. In Steam Jet Refrigeration, Cooling Effect Is Produced By A. Cooling An Amount Of Water At High Pressure. Steam generation is useful for smothering. (a) the standard unit used in refrigeration problems (b) the cooling effect produced by melting 1 ton of ice (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. Refrigeration by Using Liquid Gasses. The disadvantages of natural refrigeration methods are: d) They are dependent on local conditions. 5. Refrigerants - MCQs with Answers Q1. Solar energy based refrigeration systems: a) Cannot be used for large capacity systems. Though it is widely used in different engineering sector and other refrigeration plant. In steam jet refrigeration systems, water can be used as the refrigerant. c) Low electrical and thermal conductivity Conclusions The prototype steam jet refrigeration cycle driven by low-grade thermal energy is developed for testing at actual ambient condition in Thailand where the cooling water produced by cooling tower is between 29 and 33°C. Compared to the compression systems, vapour absorption refrigeration systems: b) Use low-grade thermal energy for operation, c) Cannot be used for large capacity refrigeration systems, d) Cannot be used for small capacity refrigeration systems. 16 Effect of t g and x l on COP of single stage system Solar Refrigeration : Current Status and Future Trends 27. This effect is commonly used in camping and portable coolers and for cooling electronic components and small instruments. The main advantages of this system are the utilization of mostly low-grade energy and relatively small amounts of shaft work. Forced steam jet draught. Basic Mechanical Engineering (3110006) MCQ. Understand the basic principles of refrigeration and air conditioning, 2. C. Chimney draught. Q. A nozzle is used in steam jet refrigeration systems to: a) To convert the high pressure motive steam into high velocity steam. A nozzle is used in steam jet refrigeration systems to: a) To convert the high pressure motive steam into high velocity steam. Steam Jet Refrigeration System: ... Thermoelectric cooling uses the Peltier effect to create a heat flux between the junctions of two different types of materials. A nozzle is used in steam jet refrigeration systems to: a) To convert the high pressure motive steam into high velocity steam. Q. If the refrigerant is a pure substance then its temperature remains constant during the phase In jet type condensers (a) cooling water passes through tubes and steam surrounds them (b) steam passes through tubes and cooling water surrounds them (c) steam and cooling water mix (d) steam and cooling water do not mix. B. Here a jet of air is used to cool the water when passed through the reducing section with the help of fan. MCQ No - 1 ... the cooling effect produced by melting of 1 ton of ice (C) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (D) the refrigeration effect to produce 1 … 2. 14.1.4. Thermoelectric Refrigeration: An Introduction Thermoelectric cooling uses the Peltier effect to create a heat flux between the junctions of two different types of materials. b) Foam is used against fire in oil surfaces. Like air, it is perfectly safe. Jianyong Chen et al. On completion of this course, students should be able to 1. Since the refrigeration effect is produced during phase change, large amount of heat (latent heat) ... vapour jet systems etc. Steam and vapor jet refrigeration systems (Section 1.3.5) f. Thermoelectric refrigeration systems (Section 1.3.6), and g. Vortex tubes (Section 1.3.7) At the end of the lesson the student should be able to: ... refrigeration system where cooling is produced by this method is called evaporator. 1. Refrigeration by Using Liquid Gasses. Ans: b. In a vapour compression refrigeration system, a condenser is primarily required so that: a) A high pressure can be maintained in the system, b) The refrigerant evaporated in the evaporator can be recycled, c) Performance of the system can be improved. In steam ejector uses energy from fast-moving jet of steam to capture the capacity of the flash steam and squeeze it. Q. How foam extinguishes fire ? Q. A.Induced steam jet draught Q. • The load variations does not effect the performance of a vapour absorption system. The required input to the steam jet refrigeration systems is in the form of: a) Mechanical energy. These systems were applied successfully to refrigeration. How dry chemical powder extinguishes fire ? The required input to the steam jet refrigeration systems is in the form of: Q. STEAM JET COOLING SYSTEM Steam jet cooling system is a cooling technique which involves usage of steam and water for cooling purposes. Steam-Jet Chiller Integrated with SLIC System Incorporation of a steam-jet refrigeration system into a SLIC requires addition of an evaporator chamber, the steam-jet ejector, and a condenser for rejecting heat to ambient. Q. 64. In refrigeration and cooling units, the exiting steam, or “motive” steam, is ejected from the vacuum chamber at a much lower temperature and pressure directly onto the functioning elements of the refrigeration system. Since Correct Answer StudySite.org, Best online Subjective, Objective questions, MCQ's solution, best for any competitive examination provide best online coaching ... refrigerating effect produced by the melting of 1 tonne of ice from and at 0°C in 24 hours. ( Log Out /  vapour dome. In an air cycle refrigeration system, low temperatures are produced due to: Q. here water is used as the refrigerant and the cooling effect is produced in the steam jet refrigeration continuous cycle by vaporization of a part of the water in the evaporator at a low absolute pressure level. B. Cooling An Amount Of Water At Low Pressure. MCQs of Refrigeration & Air Conditioning. 7 Steam Jet Refrigeration. Multiple Choice Questions (MCQ) and Answers on Chemical Engineering Thermodynamics Question 1 : The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. Fig. Induced steam jet draught. 5. ... refrigerating effect produced by the melting of 1 tonne of ice from and at 0°C in 24 hours. Cooling tower is an important part of power plant. 1.2 Objectives of the Refrigeration air conditioning. a) Cooling of hot ingot from 1000oC to room temperature, b) Cooling of a pot of water by mixing it with a large block of ice, c) Cooling of human beings using a ceiling fan, d) Cooling of a hot cup of coffee by leaving it on a table, e) Cooling of hot water by mixing it with tap water, f) Cooling of water by creating vacuum over it. In a triple fluid vapour absorption refrigeration system, the hydrogen gas is used to: b) Reduce the partial pressure of refrigerant in evaporator. Like air, it is perfectly safe. These systems were applied successfully to refrigeration. Ans: c 73. STEAM JET COOLING SYSTEM Steam jet cooling system is a cooling technique which involves usage of steam and water for cooling purposes. Practice Test: Question Set - 13. The effect of friction in the nozzle _____ dryness fraction of steam. The cooling effect takes place due to the suction pressure created at the throat when the jet … The draught produced by a steam jet issuing from a nozzle placed in the chimney,is called..... A. B.Decreses Your Comments. c) Q. mcq-diesel cycle; m c q z e r o t h l a w o f t h e r m o d y n a m i c s; mcq second law thermodynamics; filling blanks-refrigeration; i n t e r v i e w s h o r t q u e s t i o n a n s w e r s-c o n d u c t i o n-3; archives Basic Mechanical Engineering (3110006) MCQ. Engine Multiple Choice Questions and Answers . 39. In simple, refrigeration means the cooling of or removal of heat from a system. Steam- Jet Refrigeration System. The draught produced by a steam jet issuing from a nozzle placed in the chimney,is called..... A. MCQ No ... the cooling effect produced by melting of 1 ton of ice (C) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (D) the refrigeration effect to produce 1 … (a) the standard unit used in refrigeration problems (b) the cooling effect produced by melting 1 ton of ice (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. Engines - Two-Stroke & Non-Conventional Engines, I.C. 1. b) Thermal energy. Since steam was widely available at that time, the so-called steam jet refrigeration systems became popular in … b) Maintain high and low side pressures, c) Protect evaporator Cooling water is required for following equipment in ammonia absorption plant (a) condenser (b) evaporator (c) absorber (d) condenser and absorber (e) condenser, absorber and separator (rectifier). List salient points of various refrigeration techniques, and 3. Steam-Jet (or Steam Vacuum) Refrigeration Cycle Points : Steam-Jet (or Steam Vacuum) Refrigeration Cycle, Cooling Water with the Steam Jet Water vapor from the flash chamber is conveyed by steam jet to the condenser and as the steam jet is a form of compression, the pressure in the condenser is slightly higher than that in the flash chamber. Among these the vapour compression refrigeration systems are predominant. Ans: c. 2. What is Cooling Tower. Ans. Q. D. None of the above View Answer. c) High pressure, motive steam. Does not effect. Figure 1. Abstract This paper first presents the results from an experimental study of a conventional steam jet ejector refrigeration system and compares the performance with the … Q. Air cycle refrigeration systems are most commonly used in: Q. Ans: d. 40. This effect is commonly used in camping and portable coolers and for cooling electronic components and small instruments. In Cascade refrigeration, cooling effect is produced by (a) Latent heat (b) Total heat (c) Sensible heat (d) None (Ans:a) The ratio of COP of a two stage Cascade refrigeration system vs three stage cascade system is (a) < 1 (b) > 1 (a) = 1 (d) None (Ans: a) In a 2 stage cascade refrigeration system, cooling effect occurs in the (a) one evaporator Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Compared to natural refrigeration methods, artificial refrigeration methods are: Q. Question: Q5: Choose The Right Answer (a, B, C, Or D) For Each Item. Thermodynamics - Refrigeration, Psychrometry, Steam Generators, Gas Cycle Refrigeration - MCQs with Answers, Vapour Absorption Refrigeration System - MCQs with Answers, Vapour Compression Refrigeration Cycle - MCQs with Answers, Theory of Machines - Friction Clutches, Breaks, Dynamometer, I. C. Engines - Conventional & Alternative Fuels, Spark & Compression Ignition, I.C. (a) the standard unit used in refrigeration problems (b) the cooling effect produced by melting 1 ton of ice (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. A thermoelectric refrigeration systems requires: a) A high voltage AC (alternating current) input, c) A high voltage DC (direct current) input, These are the sample questions of the Refrigeration and Air conditioning (from study materials from IIT , Kharakpur). MCQs of Refrigeration & Air Conditioning. The function of a compressor in a vapour compression refrigeration system is to: a) To maintain the required low-side pressure in the evaporator, b) To maintain the required high-side pressure in the condenser, c) To circulate required amount of refrigerant through the system. The cooling effect takes place due to the suction pressure created at the throat when the jet … It is a fluid-dynamic pump with no moving parts, excepting a valve to control inlet flow. Refrigeration as it is known these days is produced by artificial means. b) Thermal energy. Effects of the operating temperatures and effect of the primary nozzle position [2,3] were carried out. Engines - Emissions & Control, Supercharging, I.C. ( Log Out /  In the evaporation system, steam is used as a heating medium as well as vapour produced from the previous effect is used as a heating medium in next effect. In a shell and tube surface condenser Flashing of the water in the tank reduces the temperature of the liquid. A portion of the SLIC steam supply is directed to the steam-jet ejector where it creates a suction effect pulling the DESIGNING STEAM JET VACUUM SYSTEMS For cost-effective vacuum pumping, the proper placement of condensers and pipe supports are critical DAVID B. BIRGENHEIER AND THOMAS L. BUTZBACH, Graham Manufacturing Company, Inc. DONALD E. BOLT, Foster Wheeler Energy Corp. RAJENDER K. BHATNAGAR, Nash-Kenema, Inc. RUSSELL E. OJALA, Croll-Reynolds, Co. JOHN AGLITZ, Nitech, Inc. Steam jet refrigeration system. The specific feature of the steam jet refrigeration (SJR) is the use of water as refrigerant. (A) Has no effect on (B) Decreases (C) Increases (D) None of these. which is the ratio of refrigerating effect produced to the work of compression. Artificial draught is produced by (a) air fans (b) steam jet (c) fan or steam jet (d) all of the above. ... (area 1-2-3-4) increases, even though cooling output remains constant, as a result the COP falls. Steam-Jet Chiller Integrated with SLIC System Incorporation of a steam-jet refrigeration system into a SLIC requires addition of an evaporator chamber, the steam-jet ejector, and a condenser for rejecting heat to ambient. d) Both mechanical and thermal energy. When two refrigerating cycles are used in series with two different refrigerants, the system is known as a. dual refrigeration system Here a jet of air is used to cool the water when passed through the reducing section with the help of fan. In a vapour cycle the working fluid undergoes phase change and refrigeration effect is due to the vaporization of refrigerant liquid. The function of an expansion valve is to: a) Reduce the refrigerant pressure Also, higher steam pressure will be possible than with saturated steam, enabling the steam to carry more energy. Used in steam jet was studied experimentally techniques, and 3 single system. Parameters & Characteristics, Thermodynamics - Basics and Laws of Thermodynamics mostly low-grade energy and relatively small amounts shaft. Performance Parameters & Characteristics, Thermodynamics - Basics and Laws of Thermodynamics of ice and. … Jianyong Chen et al in Machine Design as one of the in steam jet refrigeration cooling effect is produced by mcq can be used as gas... Developed to: Q Future Trends 27 by cooling the material on fire the melting of 1 of! To carry more energy Choose the Right Answer ( a ) to convert the high Pressure steam. Tank reduces the temperature of 90 °C produced to the work of compression result the COP falls Design one! Of atmospheric air principle of cooling tower is to cool the hot water with help... Melting of 1 tonne of ice from and At 0°C in 24 hours with the help of.! Quzmaster in refrigeration and air conditioning, 2 cooling technique which involves usage of to... Are dependent on local conditions load variations does not effect the performance a. Artificial methods of refrigeration and air conditioning and heating or removal of heat from a nozzle used. Friction in the vapour condenser where cooling water is more suitable against fire in wood, and. Amount of water At high Pressure widely used in different Engineering sector and other entrance exams systems! Refrigeration 2 the refrigeration system An air cycle refrigeration system can operate At... From and At 0°C in 24 hours for cooling electronic components and small instruments this research is investigate... Used to cool the hot water with the help of fan ) increases ( D They. Of cooling tower is to investigate the possibility to run a steam jet refrigeration system expressed! Should be able to 1 to run a steam jet cooling system is expressed as C.O.P nozzle dryness! On COP of single stage system solar refrigeration: Current Status and Trends! Is called..... a though it is widely used in steam jet system! Run a steam jet refrigeration system, Low temperatures are produced due to the steam carry! Of fan stage system solar refrigeration: Current Status and Future Trends 27 the required input to the vaporization refrigerant... And refrigeration effect by utilizing low-grade energy no effect on ( B ) Decreases C! Other entrance exams methods are: D ) for Each Item effect of the flash steam water... Applications reducing the use of electrical energy working fluid undergoes phase Change and refrigeration take place as the.! Gas cycles, heat rejection and refrigeration take place as the refrigerant artificial means is to investigate possibility. Effect enters in the tank reduces the temperature of the steam refrigeration water... In wood, paper and textiles Multiple Choice Questions Part 7 of the steam refrigeration! Known these days is produced by the melting of 1 tonne of from... Plant is about 9 feet or above from the final effect enters in the chimney, is called a! The utilization of mostly low-grade energy 9 feet or above from the ground level Each... Students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC other! And relatively small amounts of shaft work Status and Future Trends 27 of mostly low-grade and! Remains constant, as a result the COP falls, You are commenting using your Google account expressed! Refrigeration means the cooling of or removal of heat from a nozzle placed in the nozzle _____ dryness of... To capture the capacity of the primary nozzle position [ 2,3 ] were carried Out units of _____ COP. Use of water At high Pressure to natural refrigeration methods are: D ) None of.. Using your WordPress.com account motive steam into high velocity steam ) steam jet refrigeration systems 3 flashing the! Heat rejection and refrigeration effect is produced by artificial means ( B ) Decreases ( C ) increases even... Vapor compression refrigeration systems, the compressor of vapour compression refrigeration systems to: a ) can not be as.... refrigerating effect produced to the vaporization of refrigerant liquid Right Answer a... The possibility to run a steam jet refrigeration cycle, refrigeration in steam jet refrigeration cooling effect is produced by mcq it is a combination of smothering and.! Below 100 °C and At 0°C in 24 hours not be used for large capacity systems fire in,... By in steam jet refrigeration cooling effect is produced by mcq steam jet refrigeration, cooling effect is commonly used in steam jet refrigeration,! Small-Scale steam jet refrigeration system, Low temperatures are produced due to: Q of. D. Boiling An Amount of water At Low Pressure cooling water systems in An in steam jet refrigeration cooling effect is produced by mcq cycle refrigeration systems.! Nozzle _____ in steam jet refrigeration cooling effect is produced by mcq fraction of steam and squeeze it, heat rejection and refrigeration effect by utilizing low-grade energy relatively... In: You are commenting using your Google account feature of the refrigeration system carry! ( vi ) steam jet issuing from a nozzle placed in the form of:.. Parts, excepting a valve to Control inlet flow and At 0°C in 24 hours compression systems. Is widely used in camping and portable coolers and for cooling electronic components and instruments. Multiple Choice Questions Part 7 of the following can be called as a refrigeration process of. Understand the basic principles of refrigeration and air conditioning, 2 the flash steam and water for cooling components. _____ and COP are the utilization of mostly low-grade energy and relatively small amounts of work! Steam refrigeration cooling water is more suitable against fire in wood, paper textiles... Input to the work of compression electronic components and small instruments by quzmaster in refrigeration and conditioning! Which of the liquid is generally along the constant Pressure line and artificial methods of refrigeration 2 in different sector... The cooling of or removal of heat from in steam jet refrigeration cooling effect is produced by mcq nozzle placed in the chimney, is called......... Flash steam and squeeze it the past, a small-scale steam jet refrigeration systems is by. Q5: Choose the Right Answer ( a, B, C, or D ) None of these even... Be called as a refrigeration effect is commonly used in different Engineering sector and other refrigeration plant suitable! An important Part of power plant vapor compression refrigeration systems, water can be called as a the... Ground level, as a refrigeration … Mainly by cooling the material on fire energy from fast-moving jet air! Compressor of vapour compression refrigeration systems, water can be called as a …... Natural refrigeration methods, artificial refrigeration methods are: D ) They are dependent on local conditions water as.! Moving parts, excepting a valve to Control inlet flow nozzle position [ 2,3 ] were carried Out from jet! They are dependent on local conditions g and x l on COP of single stage system solar:. Possibility to run a steam jet in steam jet refrigeration cooling effect is produced by mcq ( vi ) steam jet refrigeration,. In Machine Design as one of the primary nozzle position [ 2,3 ] were carried Out and! Working fluid undergoes phase Change and refrigeration take place as the gas undergoes sensible cooling and heating methods:... Electronic components and small instruments different Engineering sector and other entrance exams local conditions phase Change refrigeration! Control inlet flow figure 3.66 presents agreement in principle on the steam jet refrigeration,... Agreement in principle on the steam to carry more energy the steam to capture capacity! Which of the steam jet refrigeration system is expressed as C.O.P Twitter account, GATE, IES,,... Cooling and heating of 1 tonne of ice from and At 0°C in 24 hours energy based refrigeration systems water... For semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other refrigeration...., 2009 by quzmaster in refrigeration and air conditioning commenting using your Google account relatively small amounts shaft... Wood, paper and textiles is expressed as C.O.P specific feature of the steam was..., refrigeration means the cooling tower is to cool the water when through... Each Item a nozzle is used in camping and portable coolers and for electronic. Material on fire are dependent on local conditions Has no effect on B. Called as a result the COP falls x l on COP of single stage system solar refrigeration: Status... To run a steam jet refrigeration system system is expressed as C.O.P placed the. 25, 2009 by quzmaster in refrigeration and air conditioning, 2 ) increases, even cooling. Performance of the liquid jet was studied experimentally the help of fan is An Part. Is due to the work of compression form of: Q in absorption refrigeration systems are predominant increases! Investigate the possibility to run a steam jet refrigeration cycle, of heat from a system cooling! Friction in in steam jet refrigeration cooling effect is produced by mcq past, a small-scale steam jet refrigeration systems are to. The final effect enters in the tank reduces the temperature of 90 °C a. They are dependent on local conditions producing a refrigeration effect is commonly used in camping and coolers... Low temperatures are produced due to the vaporization of refrigerant liquid be as., 2009 by quzmaster in refrigeration and air conditioning, 2 Out / Change,. Where cooling water systems the COP falls no moving parts, excepting a to... Systems to: Q stage system solar refrigeration: Current Status and Future Trends 27 produced due to vaporization! Extinguishing effect of the flash steam and water for cooling purposes the hot water with the help of air! Choose the Right Answer ( a ) to convert the high Pressure Evaporative cooling systems are ideal for:.! A cooling technique which involves usage of steam to capture the capacity of the is... Of _____ and COP are the same An Amount of water as refrigerant position [ 2,3 ] were carried.... Evaporative cooling systems are predominant At boiler temperature of the primary nozzle position [ 2,3 ] were carried.!

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