Vapour absorption, C. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. 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. An interesting point to note about absorption chillers is that they don’t use conventional refrigerants. 5. A. 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 The … 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. the last 5 years. Vapour absorption refrigeration systems using water-lithium bromide pair are extensively used in large capacity air conditioning systems. The lithium bromide absorption refrigeration system uses a solution of lithium bromide in water. Figure 15.3 shows another chart wherein the mass fraction of lithium bromide is plotted on abscissa, while saturation Figure 2-38 is a schematic representation of an absorption refrigerated inlet system for the gas turbine. Schematic diagram of a LiBr/water (lithium–bromide/water) absorption refrigeration system equipped with an adiabatic absorber [4]. None of the above, A. Ammonia vapour is driven out of solution, C. The following are the two principles that form the basis for the lithium bromide absorption refrigeration cycle: 1. D None of these. In both systems the required refrigeration is provided by refrigerants vaporizing in the evaporator. In this investigation, a thorough thermodynamic analysis of the water/lithium bromide absorption refrigeration cycle in the absence of solution heat exchanger is performed. The water is absorbed by a lithium bromide/water solution. 20°C DBT and 60% RH, D. Lithium bromide mixes with ammonia, 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. For this analysis a typical house is modelled for a full year. Each Section contains maximum 70 questions. A. Lithium bromide is used as a refrigerant and water as an absorbent, B. In this system, water is being used as a refrigerant whereas lithium bromide, which is a highly hydroscopic salt, is used as an absorbent. Answer: Option B A system in which a secondary fluid absorbs the refrigerant, releasing heat, then releases the refrigerant and reabsorbs the heat. Ammonia is used as a refrigerant and lithium bromide as an absorbent, D. To get more questions visit other sections. 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. In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively . 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). 26°C DBT and 60% RH, 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. @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. 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, … A number of feasible methods for determining the concentration of aqueous lithium–bromide solution are imperative to review here. Vapour compression, B. 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. 57 In a lithium bromide absorption refrigeration system A Lithium bromide is used as a refrigerant and water as an absorbent. Carnot cycle, D. 7.44 kW, D. = 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. 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. This closing of valve will reduce the heat input to generator of absorption chillers and temperature in generator will be reduced. 3.72 kW, C. B Water and lithium bromide . Water is being used as refrigerant whereas Li-Br is a highly hydroscopic salt, used as absorbent. A. Lithium bromide is used as a refrigerant and water as an absorbent B. 14. Electrolux refrigerator, A. C Ammonia is used as a refrigerant and lithium bromide as an absorbent. 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. 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. A simple absorption refrigeration system common in large commercial plants uses a solution of lithium bromide or lithium chloride salt and water. Explanation are given for understanding. 6. 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