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. Ammonia is used as a refrigerant and lithium bromide as an absorbent, D. Figure 15.3 shows another chart wherein the mass fraction of lithium bromide is plotted on abscissa, while saturation In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively . Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. 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… Other types of charts showing vapour pressure data for water-lithum bromide systems are also available in literature. Water under low pressure is evaporated from the coils that are to be chilled. An important characteristic of absorption system of refrigeration is (a) noisy operation (b) quiet operation (c) cooling below 0°C 6. It should be noted that the refrigerant in the water-lithium bromide system is water Pure water is sed as refrigerant and lithium bromide solution is used as u absorbent. An interesting point to note about absorption chillers is that they don’t use conventional refrigerants. In a lithium bromide absorption refrigeration system. Heat for the vapour absorption refrigeration system can be provided by waste heat extracted from the process, diesel generator sets etc. None of the above, A. 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 C Ammonia is used as a refrigerant and lithium bromide as an absorbent. 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. The lithium bromide solution has a strong affinity for water vapour because of its very low vapour pressure. 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. Each Section contains maximum 70 questions. A. Lithium bromide is used as a refrigerant and water as an absorbent. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. it evaporates. Carnot cycle, D. The lithium-bromide absorption refrigeration system uses a solution of lithium bromide in water. Water is being used as refrigerant whereas Li-Br is a highly hydroscopic salt, used as absorbent. Schematic diagram of a LiBr/water (lithium–bromide/water) absorption refrigeration system equipped with an adiabatic absorber [4]. Absorption systems typically employ lithium–bromide (Li–Br) and water, with the Li–Br being the absorber and the water acting as the refrigerant. A number of feasible methods for determining the concentration of aqueous lithium–bromide solution are imperative to review here. Lithium bromide is used as a refrigerant and water as an absorbent, B. The … 26°C DBT and 60% RH, A. D None of these. 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. Chain Drives MCQ Practice Test: 1. Lithium bromide mixes with ammonia, D. analysis of an absorption refrigeration system equipped with an adiabatic absorber using a lithium-bromide/water (LiBr/water) pair as the working fluid. the last 5 years. A Water and water . 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. The following are the two principles that form the basis for the lithium bromide absorption refrigeration cycle: 1. A simple absorption refrigeration system common in large commercial plants uses a solution of lithium bromide or lithium chloride salt and water. 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. 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. Ammonia vapour goes into solution, B. 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. Ammonia vapour is driven out of solution, C. 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. 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. In both systems the required refrigeration is provided by refrigerants vaporizing in the evaporator. 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. For this analysis a typical house is modelled for a full year. 26°C DBT and 50% RH, C. In this system, water is being used as a refrigerant whereas lithium bromide, which is a highly hydroscopic salt, is used as an absorbent. Weak solution mixes with strong solution. 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