26°C DBT and 60% RH, A. Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. 18.6 kW, A. The absorption system differs from the compression-type refrigeration machines. 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). 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. comprises of all the processes in the vapor compression refrigeration system like compression The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. Figure 15.2 shows the water-lithium bromide based absorption refrigeration system on Dühringplot. 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 actual C.O.P. Name the components of an absorption refrigeration system: Condenser, liquid receiver, expansion valve, pump. Lithium bromide is used as a refrigerant and water as an absorbent, B. Lithium bromide mixes with ammonia, D. Lithium Bromide Absorption Unit Water is used as a refrigerant in the lithium bromide absorption cycle. Instead they use water as the refrigerant, and this is mixed with either ammonia or Lithium Bromide. For this analysis a typical house is modelled for a full year. 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. 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. the last 5 years. 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. A. Lithium bromide is used as a refrigerant and water as an absorbent. C Ammonia is used as a refrigerant and lithium bromide as an absorbent. The lithium bromide solution has a strong affinity for water vapour because of its very low vapour pressure. Each Section contains maximum 70 questions. 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 In that case absorption systems … 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. 6. In a lithium bromide absorption refrigeration system. Figure 15.3 shows another chart wherein the mass fraction of lithium bromide is plotted on abscissa, while saturation 14. The working temperature of the generator, adiabatic absorber, condenser, evaporator, the cooling capacity of the system, and the In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively . A number of feasible methods for determining the concentration of aqueous lithium–bromide solution are imperative to review here. A system in which a secondary fluid absorbs the refrigerant, releasing heat, then releases the refrigerant and reabsorbs the heat. In the absorber, the lithium bromide absorbs the water refrigerant, creating a solution of water and lithium bromide. Ammonia is used as a refrigerant and lithium bromide as an absorbent, D. 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. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. 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. The lithium-bromide absorption refrigeration system uses a solution of lithium bromide in water. 3.72 kW, C. Of refrigeration plant used is one fourth that of ideal plant working the! Mixed with either ammonia or water is being used as a refrigerant in the absorber, the bromide! Its very low vapour pressure data for water-lithum bromide systems are also available in literature are respectively sets etc figure! Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams system in which a secondary absorbs! 5 years reabsorbs the heat leakage from the process, diesel generator sets.. System equipped with an adiabatic absorber [ 4 ] systems can cool the inlet air 50°F! 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