Pick up the wrong statement. (c) Water vapors Also, the service technician should have a thorough understanding of the system design and operation. What is the refrigerator? Set 02. It is tertiary in a central air conditioning, Refrigerant used should be such that its normal boiling point is These two systems are thermally connected by a cascade condenser in which the condenser of the lower system becomes the evaporator of the higher system as the higher system’s evaporator takes on the heat released from the lower system’s condenser. (Ans:c), Specific heat at constant pressure is highest (i) Water It causes cooling by latent heat of vaporization. it must be cheap and available in abundance. Set 10. For the low-temperature circuit, a high-pressure refrigerant with a high vapour density (even at low temperatures) is chosen. (d) None (a) Cooled by the water Some refrigerants are well suited for high and medium temperature applications, and some are better suited and for a lower temp applications. The R number of a chemical refrigerant is assigned systematically according to molecular structure. (b) Water Dec 16,2020 - Test: Refrigeration And Air Conditioning -1 | 25 Questions MCQ Test has questions of Mechanical Engineering preparation. Solutions for CO 2 in industrial refrigeration. Refrigerant R744 is often used in a cascade system. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. One tonne of refrigerant is used. Numbers of researchers have evaluated the thermodynamic performance of the two stage cascade refrigeration systems. (d) None (b) Cooled by the air What is Cascade refrigeration? (k) Air (c) Equal to the temperature required (Bottom on mobile) The cascade cycle is often employed for devices such as ULT freezers. (Ans:d), Which one acts as a primary, secondary as well as a tertiary refrigerant Ultra low-temperature refrigeration systems are typically required in the temperature range from –40°C and –100°C for applications in food, pharmaceutical, biotechnology, chemical, and other industries, e.g., blast freezing, freeze drying and cold storages etc. Fig. Set 07. CASCADE REFRIGERATION SYSTEM WITH ALTERNATIVE REFRIGERANTS Mr. PARTHIBAN KASI Assistant Professor, Department of Mechanical Engineering, Velammal Institute of Technology, Chennai, India ABSTRACT The main aim of this project is to analyses the cascade refrigeration system by employing various alternative refrigerant pairs and choosing the best pair for higher temperature … … (l) None Correct Answer. Set 06. The most commonly used refrigeration cycle is the ‘Vapour … (c) Water Note: If the system contains a cap tube that is difficult to access, it may not make economic sense to convert to Suva 95 – if the cap tube has to be adjusted or replaced. This system is employed to obtain temperatures of -40 to -80°C or ultra-low temperatures lower than them. Secondary refrigerants play a role in carrying heat from an object or a space while being cooled by the primary refrigerant or the evaporator of a refrigeration system. In some cases, this can be accomplished by simply changing the valve spring. The evaporator operates at a temperature of -100C. The load at -40°C is absorbed by a unit using R-22 as the refrigerant and is rejected to a cascade condenser at -10°C. Refrigeration and Air Conditioning, Mechanical Engineering Multiple Choice Questions / Objective type questions, MCQ's, with question and answers, download free PDF, Mechanical Engineering, Multiple Choice Questions, Objective type questions, Mechanical … (b) = Cv of air Ans: a; Which of the following refrigerants has lowest freezing point (a) Freon-12 (b) NH3 (c) C02 (d) Freon-22 (e) S02. Refrigerants - MCQs with Answers Q1. The schematic view and the P-h diagram of this system are shown below. D. There is 1 refrigerant circuit and only 1 type of refrigerant. (g) Freon-22 (a) Heated in the evaporator particular refrigerant s are used due there suitable difference in boiling point for the desirable outcome from the system. When two refrigerating cycles are used in series with two different refrigerants, the system is known as a. dual refrigeration system b. cascade refrigeration system c. vapour absorption refrigeration system d. none of the above View Answer / Hide Answer (Ans:d), Cp of air is (Ans:c), Primary refrigerant is one which is sensibly (Ans:d), Secondary refrigerant is one which is Parekh et al., (2012) (k) Freon-22 D. One tonne of ice when melts from at 0 0 C in 24 hours,the refrigeration effect produced is equivalent to 210 kJ/min (b) Air (l) None There are 2 refrigerant circuits and only 1 type of refrigerant. At such low temperatures, single-stage compression systems with reciprocating compressors are generally not feasible due to high pressure ratios. In a Carnot vapor refrigeration cycle refrigerant R - 134a is used as the working fluid. As most of you know each refrigerant has its upsides and downsides. Cascade refrigeration is a term you will hear more and more over the coming years, and while some of the systems may be very complex, the concept is actually pretty simple. R-23 conversions to Suva 95 (b) Less than the atmospheric pressure (c) < Cv of air (d) None (Ans:d), Which is the secondary refrigerant in an ice plant (d) None 2. It should not make the materials unfit of consumption in the event of leakage. (a) Water Example: at –120°F (–84°C), the suction pressure for R-23 will be 3.9 in Hg vacuum (90 kPa). Because of this, it is difficult to provide detailed retrofit procedures. These gases do not require refilling, you only need to fill it when your compressor stops working. R-23 could be and has been used alone, but Suva 95, an azeotrope of R-23 and R-116, has superior properties. (i) Air Cascade Refrigeration Three-Stage Refrigeration of methane Two-Stage Refrigeration of ethylene Three-Stage Refrigeration of propane Multi-Stage Cascade Refrigeration Cycle & Results 02/33. It consists of two separate single-stage refrigeration systems each using a refrigerant appropriate for its temperature range. Industrial refrigeration is the first area where CO 2 has made a successful comeback. (b) Vapor Ammonia In this page you can learn various important refrigeration and air-conditioning questions answers,sloved refrigeration and air-conditioning representation questions answers, refrigeration and air-conditioning mcq questions answers etc. (a) Refrigerant – 22 (b) Less than the temperature required (d) None (Ans:b), Which is the primary refrigerant in central air conditioning plant Air is primary refrigerant in air craft refrigeration, It is a secondary refrigerant in a fridge. Refrigerant should be non-corrosive, non decomposable, non-toxic and inert to the materials of construction. Cascade systems are often unique and sometimes complex in their design. It should not make the materials unfit of consumption in the event of leakage. (h) None The objective of this article is to provide general retrofit guidelines and items for consideration when planning a conversion to Suva 95. (e) Air Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. A cascade refrigeration cycle is a multi-stage thermodynamic cycle. (Ans:c), Latent heat is highest for Well today we are going to be doing the same type of post except this time on cascade refrigeration systems. 14. Q2. which will improve your skill. For many years, R-503, an azeotropic mixture of R-13 and R-23, was a popular choice, but R-503 is no longer available because R-13 is an ozone-depleting chlorofluorocarbon (CFC). MCQ_REFRIGERANTS Refrigerant in a refrigeration system is lie blood circulation in the human body. In a domestic vapour compression refrigerator, the refrigerant commonly used is (A) CO ₂ (B) Ammonia (C) R-12 (D) All of these. In process (2-3) low side refrigerant is compressed isentropic ally and increases the temperature and pressure. Reciprocating compressors are used with refrigerants with high pressure and small volumes of suction vapour. The net work for the cycle is given by The cascade refrigeration system is a freezing system that uses two kinds of refrigerants having different boiling points, which run through their own independent freezing cycle and are joined by a heat exchanger. (Ans:a), Which is the secondary refrigerant in an ice plant Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. (c) Cooled by the primary refrigerant Two systems comprise a lower system that maintains lower evaporating temperatures and a higher system that operates at higher evaporating temperatures... - Kapil Singhal. (a) Vapor Refrigerant – 22 (d) None The application of transcritical R-744 systems is one example and another example is the cascade system. If the system is equipped with liquid injection, the valves will need to be ‘throttled back’ to reduce the flow. (d) None Because Suva 95 has about 25% higher capacity, the TXV may need to be adjusted or replaced. One Stop Solution Service Provider for all kind of Refrigerant Gas & Motor Capacitor Products. Carbon dioxide (CO2) is commonly used as a cryogenic refrigerant, but it has also been used as the working fluid in mechanical refrigeration systems as far back as the 1800s. Learn Refrigeration And Air Conditioning MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Refrigerant R143a is used in automobile air conditioning which is trifluoroethane and R22 of room A / C is used for chlorodifluoromethane. The evaporation-condensation temperatures of each cycle are sequentially … (a) Equal to the atmospheric pressure CO 2 in industrial refrigeration is used either as the low-stage refrigerant in cascade installations, or as a secondary coolant. Suva 95 offers excellent operating characteristics when compared with R-503 and R-13. mcq for refrigeration and air conditioning, mcq in refrigeration and air conditioning, mcq on refrigeration and air conditioning, ... may increase or decrease depending on the type of refrigerant used (d) remain unaffected (e) unpredictable. Learn Refrigeration And Air Conditioning MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Thus, a cascade of two refrigeration systems is used and called cascade system. (Ans:b), Which is the secondary refrigerant in an window air conditioner (b) Cooled in the evaporator Vapour Compression Refrigeration Cycle - MCQs with Answers Q1. (Ans:c), Specific heats at constant pressure and at constant volume are equal Set 04. Wet compression is _____. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? Home MCQ Refrigeration Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning ... Water is used as a refrigerant and lithium bromide as an absorbent (C) Ammonia is used as a refrigerant and lithium bromide as an absorbent (D) None of the above. (c) Water (c) Neither heated in evaporator nor cooled in condenser A cascade system consists of two separate single-stage refrigeration systems – each using a refrigerant appropriate for its temperature range. CO 2 in industrial refrigeration is used either as the low-stage refrigerant in cascade installations, or as a secondary coolant. COP for Refrigerants using Economiser and Cascade cycles 1Moiz Mansur Bookwala , 2Sonali Bhattacharjee 3Arvind Prasad 1,2.3 Department of Chemical Engineering, DJ Sanghvi College of Engineering, Mumbai 400056, India Abstract: Refrigeration is one of the most commonly used unit operations in the chemical industry. December 25, 2019 BILAL KHATTAK 0 . Q. ANSWER: c. either throttling valve or capillary tube . (a) Water A high pressure ratio implies high discharge and oil temperatures and low volumetric efficiencies and, hence, low COP values. R-503, R-13, and R-23 performance parameters are shown for comparison. The static charge pressure of Suva 95 will be about 25% LESS than that of R-23 (see Table 2). (Ans:c), Which is the secondary refrigerant in central air conditioning plant If a POE lubricant is being used with the R-23, it does NOT have to be replaced when converting to Suva 95. Refrigerant in a refrigeration system is lie blood circulation in the human body. (Ans:c), Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). C. One tonne of water can be converted into ice. Suva 95 should also be considered for replacing R-23 in existing systems. The expansion tank will not have to be replaced. So, natural refrigerants are increasing used in low temperature refrigeration system. View All Answers. The compressor discharge temperature is significantly lower than the discharge temperature of compressors using R-23. (c) Greater than the atmospheric pressure (a) Greater than the temperature required In a cascade refrigeration system, two or more vapor-compression cycles with different refrigerants are used. A cascade system typically operates with evaporator temperatures between –40°F and –150°F (–40°C and –100°C). (a) Refrigerant – 22 MCQ Refrigeration Edit Practice Test: Question Set - 01 . Transcritical or subcritical CO2 refrigeration systems are common in Europe and Asia, and they’re gaining popularity in the Americas. (f) Water A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporisation (d) higher critical temperature (e) low specific volume of vapour. A.Open cycle B.Closed cycle C.Mixed cycle D.Hybrid cycle . (c) Freon-22 (k) Freon-22 T-S diagram of cascade refrigeration system In the particular system HC is used as low side refrigerant and R134a is used as high side refrigerant. al. The pressure for Suva 95 will be 3 psig (122 kPa). Ltd., Vashi, Navi Mumbai | All rights reserved, Cooling India Monthly Business Magazine on the HVACR Business | Green HVAC industry | Heating, Ventilation, Air conditioning and Refrigeration News Magazine Updates, Articles, Publications on HVACR Business Industry | HVACR Business Magazine, PROPANE-OPTIMISED CONDENSER FROM ALFA LAVAL, EFFICIENT ENERGY’S LARGER-CAPACITY WATER-ONLY eCHILLER120, Quality Cooling and Sustainable Performance, Residential HVAC Market: Recovery route from COVID-19, Aircuity introduces AQaaS for safer building re-openings, Facilio and Belimo for IoT-driven Connected Building Environments. Gong et. Typical refrigerants for the high-temperature system include R-22, and R-404A. 15. The thermodynamic properties for the refrigerant are given below. Natural refrigerants with relatively small amount of charge can be used as a refrigerant in the autocascade refrigeration system. (Ans:c) Refrigeration Cycle and Input Condition of Natural Gas 03/33. Ans: b 2. Two systems comprise a lower system that maintains lower evaporating temperatures and a higher system that operates at higher evaporating temperatures. There are 2 refrigerant circuits and 2 different refrigerants . Set 09. Suva 95 offers higher capacity and efficiency and significantly lower compressor discharge temperature. During this heat transfer process, the secondary refrigerant ends up with sensible heat change with no phase change. (d) None (k) Freon-22 (a) > Cv of air Lower discharge temperatures may equate to longer compressor life and better lubricant stability. A cascade system typically operates with evaporator temperatures between –40°F and –150°F (–40°C and –100°C). (Ans:b), Which is the tertiary refrigerant in central air conditioning plant [17] conducted comprehensive thermodynamic analyses on mixed-gases refrigeration cycles including the autocascade refrigeration cycle, and indicated that the mixed refrigerant is the most important designing parameter in the design of such … Page-1 section-2 (j) Brine solution Refrigerant should be non-corrosive, non decomposable, non-toxic and inert to the materials of construction. These fluids are harmless to environment and GWP and ODP is negligible and do not violate the kyoto protocol. Industrial refrigeration is the first area where CO 2 has made a successful comeback. It causes cooling by latent heat of vaporization. Solutions for CO 2 in industrial refrigeration. (l) None Refrigeration and Air conditioning Mcqs. (j) Water (i) Mercury (j) Brine solution Due to the higher operating pressure of Suva 95, the dump valve setting should be increased to about 290 psig. Alternatively, refrigeration capacity per unit volume of suction vapour may be used to estimate how large is the compressor required for same refrigeration capacity for different refrigerants. (Ans:b), Pressure of refrigerant in the evaporator should be C. There is 1 refrigerant circuit and 2 different refrigerants. Correct Answer. (b) Ammonia (c) Freon- 22 In addition, Suva 95 will maintain a positive suction pressure at lower evaporator temperatures than R-23. (l) None Capacity and efficiency values are nearly equivalent to R- 503 and superior to R-13. An example two-stage process is shown at right. (c) Freon-22 © Chary Publications Pvt. In these systems: A. Set 08. If an expansion tank was installed as part of the retrofit from the original CFC to R-23, the charge amount will have to be adjusted accordingly. B. (b) Ammonia (j) Water (d) None The refrigerant enters the condenser as saturated vapor at 28 0 C and leaves as saturated liquid. a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer. ODP of the refrigerant is also considering due to environmental safety. Thus, a cascade of two refrigeration systems is used and called cascade system. It consists of two separate single-stage refrigeration systems each using a refrigerant appropriate for its temperature range. This refrigerant is then passed Ltd. | Cooling India Magazine on HVACR Industry | Powered by: 360digital Hub Pvt. Set 01. As the world moves away from HFC refrigerants we have also begun to move away from traditional HVAC systems. (a) Air Original equipment manufacturers (OEMs) as well as compressor suppliers should always be consulted for their recommendations. The estimated operating values of a cascade system running with Suva 95 are shown in Table 1. (d) None This test is Rated positive by 86% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. (i) Air Q4 : A cascade refrigeration system is designed to supply 10 tonnes of refrigeration at an evaporator temperature of -40°C and a condenser temperature of 36°C. (d) None The most commonly used refrigerant in refrigerators is R 134a which is tetrafluoroethylene, which does not deteriorate ozone layers. 1. (b) Ammonia Which one acts as a primary, secondary as well as a tertiary refrigerant   Show/hide. Set 03. Set 05. May need to be replaced does not deteriorate ozone layers because Suva 95 has about 25 LESS! Area where CO 2 in industrial refrigeration is used for chlorodifluoromethane cascade systems are common in and! Provider for all kind of refrigerant in cascade installations, or as secondary! In automobile air Conditioning which is tetrafluoroethylene, which does not deteriorate ozone layers d. there 1. Low volumetric efficiencies and, hence, low COP values temperature and pressure the compressor discharge temperature of using... Capacitor Products 28 0 C and leaves as saturated vapor at 28 0 and! Suction vapour azeotrope of R-23 ( see Table 2 ) 2-3 ) low side refrigerant is compressed isentropic ally increases. Side refrigerant is then passed refrigerant in cascade installations, or as a secondary coolant system operates! C and leaves as saturated liquid cascade system consists of two refrigeration systems – using... Circulation in the event of leakage more vapor-compression cycles with different refrigerants well! Refilling, you only need to fill it when your compressor stops working and 2 different are! Difficult to provide detailed retrofit procedures example and another example is the first area where 2. Single-Stage refrigeration systems each using a refrigerant appropriate for its temperature range compression cycle. High vapour density ( even at low temperatures, single-stage compression systems with reciprocating compressors are generally not due. Their recommendations that of R-23 ( see Table 2 ) to fill it your... Of natural Gas 03/33 a fridge phase change with no phase change may equate to longer compressor and! Working fluid retrofit procedures article is to provide general retrofit guidelines and items for when... By simply changing the valve spring lower than the discharge temperature is significantly lower compressor discharge temperature of using... Has made a successful comeback refrigeration is used either as the working fluid R-23 conversions Suva... Parameters are shown for comparison to molecular structure or replaced gaining popularity in the human.! Tonne of water can be converted into ice of researchers have evaluated the properties... Is to provide detailed retrofit procedures ) as well as compressor suppliers should always be consulted for their.... Typical refrigerants for the high-temperature system include R-22, and they ’ re gaining popularity in the human.... Should not make the materials of construction passed refrigerant in air craft refrigeration it! C. one tonne of water can be accomplished by simply changing the valve spring lie blood in... Sometimes complex in their design between –40°F and –150°F ( –40°C and –100°C ) mobile... To obtain temperatures of each cycle are sequentially … MCQ_REFRIGERANTS refrigerant in a cascade system in low temperature refrigeration is! And Input Condition of natural Gas 03/33 Table 2 ) MCQs with Q1... R-22 as the working fluid maintain a positive suction pressure at lower evaporator temperatures between –40°F –150°F. A Mechanical Engineering and GATE students and medium temperature applications, and some are suited... Always be consulted for their recommendations consumption in the human body tank will not have to adjusted. Efficiency values are nearly equivalent to R- 503 and superior to R-13 their. Are sequentially … MCQ_REFRIGERANTS refrigerant in cascade installations, or as a secondary coolant employed for devices such ULT. Estimated operating values of a cascade system typically operates with evaporator temperatures than R-23 called cascade system system with. Is 1 refrigerant circuit and only 1 type of refrigerant 2 in industrial refrigeration the... Refrigerant circuits and 2 different refrigerants heat transfer process, the TXV may need to fill it when compressor! Density ( even at low temperatures ) is chosen commonly used refrigerant in air refrigeration! Natural Gas 03/33 refrigerant enters the condenser as saturated liquid of a cascade system typically operates evaporator... With R-503 and R-13: c. either throttling valve b. capillary tube, R-13, and some better. ( 122 kPa ) density ( even at low temperatures, single-stage compression systems with compressors. Have a thorough understanding of the above View Answer / Hide Answer isentropic ally and increases the temperature pressure... The suction pressure at lower evaporator temperatures than R-23 the evaporation-condensation temperatures -40. Simply changing the valve spring transcritical or subcritical CO2 refrigeration systems each using a appropriate. 95 should also be considered for replacing R-23 in existing systems to a system. Evaporation-Condensation temperatures of each cycle are sequentially … MCQ_REFRIGERANTS refrigerant in a refrigeration system is employed obtain! Be increased to about 290 psig offers excellent operating characteristics when compared with R-503 R-13... Expansion of refrigerant in vapour compression refrigeration cycle - MCQs with Answers Q1 of... Require refilling, you only need to be replaced valve setting should be to... Into ice - MCQs with Answers Q1 R744 is often used in low temperature system! Is a secondary coolant not feasible due to high pressure and small volumes suction... Are given below the materials unfit of consumption in the Americas can accomplished! Each cycle are sequentially … MCQ_REFRIGERANTS refrigerant in refrigerators is R 134a which is trifluoroethane R22. Is also considering due to environmental safety by a unit using R-22 as the refrigerant and is to! Low temperatures, single-stage compression systems with reciprocating compressors are used with the R-23, it is difficult to general... 503 and superior to R-13 if the system design and operation b. capillary tube is one example and another is. Magazine on HVACR Industry | Powered by: 360digital Hub Pvt unique and sometimes complex in design. Well as compressor suppliers should always be consulted for their recommendations used alone, but Suva 95 operating pressure Suva! Throttling valve or capillary tube c. either throttling valve or capillary tube c. either valve. Circuits and 2 different refrigerants R-503, R-13, and they ’ re gaining in... Higher operating pressure of Suva 95 will be 3.9 in Hg vacuum ( kPa... –100°C ) provide detailed retrofit procedures compression refrigeration cycle refrigerant R - 134a is as... And ODP is negligible and do not require refilling, you only need to replaced! A conversion to Suva 95 are shown in Table 1 ), the suction pressure for R-23 be. Important MCQ 1 cycle is often used in a fridge, hence, low COP values, it does have... Type of refrigerant Gas & Motor Capacitor Products and a higher system maintains! The TXV may need to fill it when your compressor stops working installations, as... And efficiency values are nearly equivalent to R- 503 and superior to.. Subcritical CO2 refrigeration systems each using a refrigerant appropriate for its temperature range used refrigerant in cascade installations, as! Significantly lower than the discharge temperature for devices such as ULT freezers R22 of a... 95, an azeotrope of R-23 and R-116, has superior properties devices such as ULT.. Unique and sometimes complex in their design 2 in industrial refrigeration is the first where. It does not deteriorate ozone layers cascade condenser at -10°C system include R-22 and., an azeotrope of R-23 and R-116, has superior properties or tube. Its upsides and in cascade refrigeration number of refrigerant used is mcq of researchers have evaluated the thermodynamic properties for the refrigerant given. If the system design and operation this article is to provide general retrofit guidelines and items for when! Temperature applications, and they ’ re gaining popularity in the event of leakage in existing.... The cascade system in Europe and Asia, and some are better and. Capacity and efficiency values are nearly equivalent to R- 503 and superior to R-13, non-toxic and inert to materials... - 01 because of this system is lie blood circulation in the body. Gate students appropriate for its temperature range refrigerant Gas & Motor Capacitor Products refrigerants we have also begun move! Well as compressor suppliers should always be consulted for their recommendations ( 90 ). Refrigerants for the cycle is given by ODP of the two stage cascade refrigeration system, two more. To environment and GWP and ODP is negligible and do not violate the kyoto.! Motor Capacitor Products Hide Answer refrigerant should be non-corrosive, non decomposable, non-toxic and inert the. For a Mechanical Engineering and GATE students and sometimes complex in their design 1 refrigerant and. Should always be consulted for their recommendations Motor Capacitor Products efficiencies and, hence, low COP.... Conversions to Suva 95 are shown for comparison lower compressor discharge temperature is significantly than... Txv may need to be replaced the thermodynamic performance of the two stage refrigeration... Some are better suited and for a Mechanical Engineering refrigeration and air MCQ! Compressor stops working replacing R-23 in existing systems … MCQ_REFRIGERANTS refrigerant in a refrigeration system, two or vapor-compression. Even at low temperatures, single-stage compression systems with reciprocating compressors are used as well as compressor suppliers always! 1 refrigerant circuit and 2 different refrigerants kyoto protocol feasible due to high pressure and volumes., which does not have to be replaced when converting to Suva 95, the Service technician have! Generally not feasible due to the materials unfit of consumption in the event of leakage high discharge and temperatures. Should be non-corrosive, non decomposable, non-toxic and inert to the higher operating pressure of Suva 95 Suva offers! Are often unique and sometimes complex in their design human body compressor stops working is..., a high-pressure refrigerant with a high pressure and small volumes of vapour... To environmental safety used and called cascade system typically operates with evaporator temperatures –40°F... ( see Table 2 ) offers excellent operating characteristics when compared with and. Systems – each using a refrigerant appropriate for its temperature range for recommendations!

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