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Two renewable ammonia - salt absorption refrigeration system improvements and comparison of

Evaporation heat difference between liquid caused by the different. Ammonia gas condensation heat and lithium nitrate thermal evaporation of ammonia solution vary greatly, and water vapor condensing heat and thermal evaporation of lithium bromide solution was little difference. 3 subsystems for system 1, the real effect is to increase heat, increasing heat, the heat for the absorption refrigeration sub-system 2, type G1 in the heating steam heat for 707kJ / s, while the A1 and G2 used in the regeneration solution heat to 1194kJ / s,ed hardy danmark, heating steam heat than a 69% increase, between System 1 and System 2, corresponding to the COP also between the system between 1 and System 2. FR2 see from the circulation rate, system 2 was significantly lower than System 1, while system 3 was significantly greater than the system 1. It can be seen from the cooling water consumption, minimum system 2,ed hardy tøj, system 1, the highest, but the three difference is not great. 2 from the solution for the heat exchanger can be seen that the heat transfer system 2 is much lower than the other two processes, and system 3 is much greater. The heat capacity, meaning the loss caused by the temperature difference on the big, the corresponding solution heat exchanger area is also large. From the COP as a comprehensive index and exergy efficiency point of view, the minimum system 1, system 2 and 3 showed significant improvement in the system, and the system COP 2, the highest, most efficient system Jiong 3. 4 Conclusions two ammonia a salt regeneration system and proposed two kinds of double-duplex quality refrigeration temperature simulation and analysis system, the results show that: 1) Two improved system operating performance have a greater advantage. Improve the system COP was significantly higher than that of system 1, in which the highest COP system 2, at 1.1 above; system 2 over system 1 FR2 has reduced significantly, the system instead of 3 cycle ratio rose significantly compared with System 1 high. Jiong improve the system has greatly improved efficiency, increased range of System 3 is more significant. 2) improve the system both at the highest operating pressure is also a great advantage for a 30. System 2 and System 3, the maximum operating pressure 0.2MPa, which was much lower than the maximum operating pressure of system 1 (5.7MPa above). 3) System 1 and System 2 can be in the heating temperature is below 160 ℃, stable operation, the system 3 is used when the heating temperature higher than 160 ℃ the operation is more favorable. When the cooling system needs a constant 0 ~ C below the temperature when the cooling capacity available, it is appropriate for a secondary ammonium salt regeneration system cooling. In many cases, the material needs and then gradually cooled by the cooling water temperature to the required temperature,ropa ed hardy, then very suitable for the improved quality of double-duplex refrigeration temperature absorption refrigeration system. 2 because the system has a higher COP value, in a wide temperature range could serve as a preferred object, the system 3 for 160 ~ C above the heating temperature range. However, due to the higher cooling system 3 low temperature, in some special occasions it may be more dominant than the system 2. Main notations: H, h a specific enthalpy (/ kg); P a pressure, kPa; Q of a device for heat (kw); S a solution concentration (%); a temperature (℃); W of a mass flow ( / s) required under the standard instructions: mouth of a absorber; c a condenser; e an evaporator; a Jiong; g of a regenerator exit; in a solution of imports or import; m in an average; 0 export or export of a solution ; a material to be cooled; t, a vapor; 1 a subsystem 1; 2, a sub-2 Reference 1MAhachad, MChal4a. Absol ~ onheatttllI ~ applicafiomtoabsorption | gelgmachine. P1 [DIcee 【IiI Can oftheInterlla-tionalAbsorptionHeatPumpC0l】 rerlce. AE, NewYork, NY, USA ,1994,mac makeup wholesale,101-1072DAKouremenes, ERosdms, KAAntonepoulos. rash-ettl-ciency, compoundNH3 / H ~ O a o, IjBrabsorption-refrigera-tionsystem. Energy (Oxford), 1989,fred perry,14 (12) :893-9053MSag) firuddin, ASiddiqui. F_ ~ glomicanalysisoftwostagedualfluidabsorptioncycleforoptimizinggeneratorteml ~ tatutes. En-etgyComersMsmt, 2001,42 (4) :407-437

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