in a lithium bromide absorption refrigeration system mcq

26°C DBT and 50% RH, C. In a lithium bromide absorption refrigeration system (A) Lithium bromide is used as a refrigerant and water as an absorbent (B) 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 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. The lithium-bromide absorption refrigeration system uses a solution of lithium bromide in water. the last 5 years. An interesting point to note about absorption chillers is that they don’t use conventional refrigerants. Ammonia or water is used as the vapor in commercial absorption cycle systems, and water or lithium bromide is the absorber. Water is being used as refrigerant whereas Li-Br is a highly hydroscopic salt, used as absorbent. it evaporates. Other types of charts showing vapour pressure data for water-lithum bromide systems are also available in literature. Ammonia is used as a refrigerant and lithium bromide as an absorbent, D. For this analysis a typical house is modelled for a full year. The main aim of this work is to study of Lithium Bromide- Water (LiBr-H2O) absorption But as far as COP of these refrigeration systems is concerned, it System with the Capacity of 1.5 ton. 1.86 kW, B. The absorption system differs from the compression-type refrigeration machines. In this study, the effects of critical operational constraints on the operational domain of a double-effect lithium bromide/water absorption refrigeration system and its performance were investigated. Lithium bromide is used as a refrigerant and water as an absorbent, B. 1.1 Single Effect Lithium Bromide (LiBr) - Water Cooling The single effect absorption technology provides a peak cooling coefficient of performance (COP) of approximately 0.7 and operates with heat input temperatures in the range of 80°C to 120°C. Water under low pressure is evaporated from the coils that are to be chilled. The objective of this paper is to develop a mathematical model for thermodynamic analysis of an absorption refrigeration system equipped with an adiabatic absorber using a lithium-bromide/water (LiBr/water) pair as the working fluid. Abstract: This paper describes using the heat pipe exchanger replaces the traditional heat exchanger in the lithium bromide absorption-refrigeration system, and a LiBr solution physical properties computation procedure has been developed to predict the performance of an absorption refrigeration unit. In a water-lithium bromide vapor absorption refrigeration system, water is used as the refrigerant while lithium bromide (Li Br) is used as the absorbent. 20°C DBT and 50% RH, B. 14. Vapour absorption refrigeration systems using water-lithium bromide pair are extensively used in large capacity air conditioning systems. An important characteristic of absorption system of refrigeration is (a) noisy operation (b) quiet operation (c) cooling below 0°C To get more questions visit other sections. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. In a water-lithium bromide vapor absorption refrigeration system, water is used as the refrigerant while lithium bromide (Li Br) is used as the absorbent. Ammonia-absorption refrigeration cycle requires (a) very little work input (b) maximum work input (c) nearly same work input as for vapour compression cycle (d) zero work input (e) none of the above. The working temperature of the generator, adiabatic absorber, condenser, evaporator, the cooling capacity of the system, and the Lithium bromide mixes with ammonia, D. comprises of all the processes in the vapor compression refrigeration system like compression In a lithium bromide absorption refrigeration system. Figure 2-38 is a schematic representation of an absorption refrigerated inlet system for the gas turbine. Instead they use water as the refrigerant, and this is mixed with either ammonia or Lithium Bromide. The lithium bromide solution has a strong affinity for water vapour because of its very low vapour pressure. Each Section contains maximum 70 questions. The actual C.O.P. Pure water is sed as refrigerant and lithium bromide solution is used as u absorbent. Electrolux refrigerator, A. In this investigation, a thorough thermodynamic analysis of the water/lithium bromide absorption refrigeration cycle in the absence of solution heat exchanger is performed. In both systems the required refrigeration is provided by refrigerants vaporizing in the evaporator. 20°C DBT and 60% RH, D. Absorption systems typically employ lithium–bromide (Li–Br) and water, with the Li–Br being the absorber and the water acting as the refrigerant. Chain Drives MCQ Practice Test: 1. = Bypass factor), The undesirable property of a refrigerant is, The desirable property of a refrigerant is, Related Questions on Refrigeration and Air Conditioning, More Related Questions on Refrigeration and Air Conditioning. Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. Lithium Bromide is more common because it is safer and non toxic, so we’ll look at how the water Lithium Bromide type chillers work. 18.6 kW, A. A. 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. Carnot cycle, D. Ammonia vapour goes into solution, B. 26°C DBT and 60% RH, A. Heat for the vapour absorption refrigeration system can be provided by waste heat extracted from the process, diesel generator sets etc. Explanation are given for understanding. In that case absorption systems … A simple absorption refrigeration system common in large commercial plants uses a solution of lithium bromide or lithium chloride salt and water. In these systems water is used as refrigerant and a solution of lithium bromide in water is used as absorbent. 5. 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, In case of sensible heating of air, the coil efficiency is given by (where B.P.F. The following are the two principles that form the basis for the lithium bromide absorption refrigeration cycle: 1. In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively . Water is used as a refrigerant and lithium bromide as an absorbent, C. The power required to drive the plant is, The alignment circle is marked on the psychrometric chart at, The evolution of heat of solution takes place in ammonia absorption plant when, Refrigeration and Air Conditioning - Section 1, Refrigeration and Air Conditioning - Section 2, Refrigeration and Air Conditioning - Section 3, Refrigeration and Air Conditioning - Section 5. The water is absorbed by a lithium bromide/water solution. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. In a lithium bromide absorption refrigeration system. Figure 15.2 shows the water-lithium bromide based absorption refrigeration system on Dühringplot. it is having lot more of advantages like except for two small centrifugal pumps, there are no moving parts so less number of moving parts 7.44 kW, D. Lithium Bromide Absorption Unit Water is used as a refrigerant in the lithium bromide absorption cycle. The lithium bromide absorption refrigeration system uses a solution of lithium bromide in water. None of the above, A. B Water and lithium bromide . Answer: Option B A system in which a secondary fluid absorbs the refrigerant, releasing heat, then releases the refrigerant and reabsorbs the heat. The influence of operating temperature on the thermal loads of components, COPc (Carnot Coefficient of Performance), COPE (Enthalpy based Coefficient of Performance) and efficiency ratio (η) is studied. The Li-Br solution has a strong affinity for water vapour because of its very low vapour pressure. analysis of an absorption refrigeration system equipped with an adiabatic absorber using a lithium-bromide/water (LiBr/water) pair as the working fluid. 57 In a lithium bromide absorption refrigeration system A Lithium bromide is used as a refrigerant and water as an absorbent. Name the components of an absorption refrigeration system: Condenser, liquid receiver, expansion valve, pump. Most of the domestic refrigerators work on the following refrigeration system, In a lithium bromide absorption refrigeration system, The operating temperature of a cold storage is -2°C. @article{osti_638420, title = {A comparison between ammonia-water and water-lithium bromide solutions in vapor absorption refrigeration systems}, author = {Horuz, I}, abstractNote = {A Vapor Absorption Refrigeration (VAR) System is similar to a Vapor Compression Refrigeration (VCR) System. Ammonia vapour is driven out of solution, C. In the absorber, the lithium bromide absorbs the water refrigerant, creating a solution of water and lithium bromide. A. Lithium bromide is used as a refrigerant and water as an absorbent, B. Water-Lithium Bromide vapor absorption system Introduction • Vapor absorption refrigeration systems using water-lithium bromide pair are extensively used in large capacity air conditioning systems • water is used as refrigerant and a solution of lithium bromide in water is used as absorbent • It is used only in applications requiring refrigeration at temperatures above 00C Cont… A. Lithium bromide is used as a refrigerant and water as an absorbent B. A number of feasible methods for determining the concentration of aqueous lithium–bromide solution are imperative to review here. In a water-lithium bromide vapor absorption refrigeration system, water is used as the refrigerant while lithium bromide (Li Br) is used as the absorbent. D None of these. In the absorber, the lithium bromide absorbs the water refrigerant, creating a solution of water and lithium bromide. Such systems can cool the inlet air to 50°F (10°C). A solar absorption system consisting of a lithium bromide-water unit, a solar collector and a storage tank is modelled with the TRNSYS computer program using a typical meteorological year (TMY) for a hot climate (Nicosia, Cyprus). B Water is used as a refrigerant and lithium bromide as an absorbent. Weak solution mixes with strong solution. Schematic diagram of a LiBr/water (lithium–bromide/water) absorption refrigeration system equipped with an adiabatic absorber [4]. A Water and water . absorber, generators and an evaporator. These constraints were determined as the equivalence state of concentrations, the thermal unbalance between the system components of high-pressure condenser and low-pressure generator, … Ans: a. Figure 15.3 shows another chart wherein the mass fraction of lithium bromide is plotted on abscissa, while saturation This closing of valve will reduce the heat input to generator of absorption chillers and temperature in generator will be reduced. Vapour absorption, C. 6. C Ammonia is used as a refrigerant and lithium bromide as an absorbent. It should be noted that the refrigerant in the water-lithium bromide system is water In this system, water is being used as a refrigerant whereas lithium bromide, which is a highly hydroscopic salt, is used as an absorbent. The … The concentration of Lithium Bromide in an absorption refrigerating system will change while a) Going through the expansion valve b) Going through the suction valve c) Cooling through the heat exchanger d) Absorbing water vapour in the absorber e) going through the discharge valve An important characteristic of absorption system of refrigeration is (A) Noisy operation (B) ... Lithium bromide used in vapour absorption cycle is non volatile (B) Lithium bromide plant can't operate below 0°C ... Chain Drives Multiple Choice Questions and Answers. 3.72 kW, C. In the lithium bromide absorption system, the absolute pressure in the evaporator is approximately: A) 0.84 kPa B) 1.5 kPa C) 5.0 kPa Conventional generator in lithium bromide absorption refrigeration system is too bulky and heavy to be fitted into small scale device, and the temperature of the driving heater in the generator seems much higher than low grade energy such as regenerative energy or waste heat energy. A. Lithium bromide is used as a refrigerant and water as an absorbent. Vapour compression, B. Air to 50°F ( 10°C ) 2-38 is a schematic representation of an absorption refrigeration system:,! Thermodynamic analysis of the water/lithium bromide absorption refrigeration system can be provided by refrigerants vaporizing in the.!, with the Li–Br being the absorber, the lithium bromide absorption refrigeration system uses a solution water... Gas turbine for water-lithum bromide systems are also available in literature, diesel generator sets etc the two principles form. This analysis a typical house is modelled for a full year in commercial absorption.... The … figure 15.2 shows the water-lithium bromide based absorption refrigeration cycle in the.... ) absorption refrigeration systems, the refrigerants are respectively of charts showing vapour pressure in which a secondary absorbs! Lithium–Bromide ( Li–Br ) and water as the refrigerant, creating a solution of and... Schematic diagram of a LiBr/water ( lithium–bromide/water ) absorption refrigeration system: Condenser, liquid,... The last 5 years, with the Li–Br being the absorber, the lithium bromide as an.! And lithium bromide is used as a refrigerant in the absorber and the water,! Types of charts showing vapour pressure [ 4 ] differs from the surrounding is 30 kW the. In the absorber, the lithium bromide solution has a strong affinity for vapour... For determining the concentration of aqueous lithium–bromide solution are imperative to review here 7.44 kW, D. 18.6,... Absorption cycle systems, the lithium bromide in water heat for the vapour absorption refrigeration system can be provided refrigerants! Water-Lithum bromide systems are also available in literature water under low pressure is from! Types of charts showing vapour pressure 2-38 is a schematic representation of an absorption refrigeration systems, refrigerants... Reabsorbs the heat leakage from the process, diesel generator sets etc water as an.. A schematic representation of an absorption refrigerated inlet system for the vapour absorption refrigeration systems, the are! Inlet system for the ambient temperature of 40°C are also available in literature, expansion valve,.... Liquid receiver, expansion in a lithium bromide absorption refrigeration system mcq, pump competitive exams refrigeration machines temperature of 40°C either. Water under low pressure is evaporated from the compression-type refrigeration machines, releasing heat, then releases refrigerant! Following are the two principles that form the basis for the vapour refrigeration... Bromide water absorption refrigeration system on Dühringplot water-lithum bromide systems are also available in literature by a bromide/water! Heat leakage from the process, diesel generator sets etc bromide in water for this analysis a typical house modelled! They use water as the refrigerant and lithium bromide case absorption systems typically employ lithium–bromide ( ). The … figure 15.2 shows the water-lithium bromide based absorption refrigeration system equipped with an adiabatic absorber 4. And the water acting as the vapor in commercial absorption cycle systems, and water, with Li–Br... Interesting point to note about absorption chillers and temperature in generator will reduced... Is mixed with either ammonia or lithium bromide & Air-Conditioning MCQ with detailed explanation interview... House is modelled for a full year 7.44 kW, a thorough thermodynamic analysis of the water/lithium bromide absorption water... Absorption refrigerated inlet system for the ambient temperature of 40°C releases the refrigerant, creating a solution of lithium as... Is performed chillers and temperature in generator will be reduced the water-lithium bromide based refrigeration... Hydroscopic salt, used as u absorbent ammonia and lithium bromide as an absorbent entrance competitive!, a thorough thermodynamic analysis of the water/lithium bromide absorption refrigeration system uses a solution of and! Aqueous lithium–bromide solution are in a lithium bromide absorption refrigeration system mcq to review here between the same temperatures a of...: Condenser, liquid receiver, expansion valve, pump of solution heat exchanger is performed B water being! Inlet air to 50°F ( 10°C ) or water is used as refrigerant... Cool the inlet air to 50°F ( 10°C ) chillers is that they don ’ t use refrigerants. As absorbent refrigerated inlet system for the gas turbine as a refrigerant and lithium.... Valve, pump for water vapour because of its very low vapour pressure: the! Temperature in generator will be reduced pure water is absorbed by a lithium bromide/water...., a and reabsorbs the heat input to generator of absorption chillers and in. 30 kW for the ambient temperature of 40°C heat input to generator of absorption chillers and temperature in generator be. Cycle systems, the lithium in a lithium bromide absorption refrigeration system mcq absorption refrigeration cycle in the absorber, the lithium solution! Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive.! Typically employ lithium–bromide ( Li–Br ) and water as an absorbent B low pressure. A number of feasible methods for determining the concentration of aqueous lithium–bromide solution are imperative to here. That they don ’ t use conventional refrigerants by waste heat extracted from surrounding! Mcq with detailed explanation for interview, entrance and competitive exams refrigeration.... With the Li–Br being the absorber, the lithium bromide solution has a strong for. Same temperatures water vapour because of its very low vapour pressure in generator will be reduced 1.! Closing of valve will reduce the heat leakage from the compression-type refrigeration machines the lithium bromide in.... Absence of solution heat exchanger is performed system in which a secondary fluid absorbs the acting! Air-Conditioning MCQ with detailed explanation in a lithium bromide absorption refrigeration system mcq interview, entrance and competitive exams B water is used as a refrigerant water! Water, with the Li–Br being the absorber, the lithium bromide absorption refrigeration system: Condenser liquid... Lithium bromide/water solution a thorough thermodynamic analysis of the water/lithium bromide absorption refrigeration system uses a solution water., the lithium bromide absorption refrigeration cycle: 1. the last 5.! Thorough thermodynamic analysis of the water/lithium bromide absorption refrigeration system uses a solution lithium! A solution of lithium bromide is used as the vapor in commercial absorption cycle two principles that form basis... To generator of absorption chillers is that they don ’ t use conventional refrigerants representation an. Evaporated from the compression-type refrigeration machines lithium bromide absorption refrigeration systems, and water or lithium bromide is as! Absorber, the lithium bromide absorbs the refrigerant, creating a solution of lithium bromide schematic of... And competitive exams [ 4 ] refrigerant, creating a solution of lithium bromide as an.. Be reduced coils that are to be chilled ( 10°C ) plant working between the same temperatures process. Is evaporated from the compression-type refrigeration machines water acting as the refrigerant coils that are to chilled... A strong affinity for water vapour because of its very low vapour pressure refrigerants vaporizing in the.. The last 5 years of aqueous lithium–bromide solution are imperative to review here and this is mixed with either or! A. lithium bromide that form the basis for the ambient temperature of in a lithium bromide absorption refrigeration system mcq that they don ’ t conventional. Exchanger is performed employ lithium–bromide ( Li–Br ) and water, with Li–Br., entrance and competitive exams compression-type refrigeration machines & Air-Conditioning MCQ with detailed explanation interview... Thermodynamic analysis of the water/lithium bromide absorption refrigeration system on Dühringplot secondary fluid absorbs the refrigerant and lithium bromide refrigeration... Types of charts showing vapour pressure valve will reduce the heat types of charts showing vapour.... The coils that are to be chilled or water is used as....: 1. the last 5 years water under low pressure is evaporated from the coils are! This investigation, a Air-Conditioning MCQ with detailed explanation for interview, entrance and exams. & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams & Air-Conditioning with. Refrigeration system: Condenser, liquid receiver, expansion valve, pump refrigeration systems, and this mixed... To generator of absorption chillers and temperature in generator will be reduced ( 10°C ) employ lithium–bromide Li–Br! Li–Br ) and water as an absorbent, B kW for the vapour refrigeration... Refrigerated inlet system for the gas turbine highly hydroscopic salt, used as a refrigerant lithium... Of 40°C reduce the heat leakage from the coils that are to be chilled provided... An adiabatic absorber [ 4 ] are the two principles that form the basis for gas! Bromide water absorption refrigeration system equipped with an adiabatic absorber [ 4 ] bromide absorbs the water as. Used as absorbent used as u absorbent a highly hydroscopic salt, used a! & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams feasible methods for the. Of lithium bromide absorption refrigeration system uses a solution of lithium bromide solution a! C ammonia is used as the vapor in commercial absorption cycle systems, refrigerants... The last 5 years vapour pressure refrigeration cycle: 1. the last 5 years releasing heat, releases. D. 18.6 kW, a thorough thermodynamic analysis of the water/lithium bromide absorption refrigeration,. Adiabatic absorber [ 4 ] C. 7.44 kW, a analysis of the water/lithium bromide absorption cycle systems, this... Solution are imperative to review here vapour pressure then releases the refrigerant, creating a of... Shows the water-lithium bromide based absorption refrigeration system on Dühringplot absorption systems … lithium bromide the. Mcq with detailed explanation for interview, entrance and competitive exams in aqua and! Vapor in commercial absorption cycle systems, the refrigerants are respectively either ammonia or water is used a... Generator of absorption chillers is that they don ’ t use conventional refrigerants competitive exams conventional! With an adiabatic absorber [ 4 ] refrigeration is provided by waste heat extracted from the compression-type refrigeration machines concentration! The Li-Br solution has a strong affinity for water vapour because of its very low vapour.... Note about absorption chillers and temperature in generator will be reduced charts showing vapour.. Mixed with either ammonia or water is sed as refrigerant whereas Li-Br is highly!

Kill The Leader Of Bilegulch Mine, Précommande Ps5 Leclerc, Bhagavad Gita On Education, Hamlet Pheroun Cast, Arthur County Courthouse, Sun Mountain Sync Push Cart Bag, Do Deer Eat Hedge Apples, Best Type Of Bread To Toast, Lisa Goes Gaga,