Experimental energy and exergy analysis of a novel water-LiBr absorption system

Gutiérrez-Urueta, G.; Huicochea, A.; Rivera, W.; Rodríguez-Aumente, P.A.; Oviedo-Tolentino, F.

doi:10.1504/ijex.2017.10005443

Cited by 1 publication

(2 citation statements)

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“…In an HTG, a part of refrigerant vapor is removed from the solution at a relatively high temperature. The refrigerant vapor (17) and the high-concentration solution (14) from the HTG enter the LTG. The strong absorbent solution (14) enters the absorber through the solution valves, LTG, and solution heat exchangers (LTHX and HTHX) (14-15-16-4-5-6).…”

Section: System Configurationmentioning

confidence: 99%

“…The study presented that as the temperature of the generator increased, the exergy efficiency decreased in all five types of chillers because exergy destruction increased. Urueta et al 17 investigated the adiabatic absorber in a single‐effect LiBr–water absorption refrigeration cycle regarding COP, subcooling solution, and exergy efficiency. The results showed that by rising the generator temperature and the mass flow rate of the weak solution, the COP and exergy efficiency increased.…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity analysis of avoidable and unavoidable exergy destructions in a parallel double‐effect LiBr–water absorption cooling system

Zendehnam

Pourfayaz

2022

Energy Science & Engineering

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A parametric study has been carried out based on advanced exergy assessment for a parallel double‐effect LiBr–water absorption chiller. The advanced exergy method provides the real potential of the equipment for improvement in the system by recognizing the avoidable irreversibilities. The sensitivity analysis of various parts of the exergy destruction (endogenous avoidable, endogenous unavoidable, exogenous avoidable, and exogenous unavoidable) in system components and the overall performance (coefficient of performance, exergy efficiency, and modified exergy efficiency) of the system has been done to identify the actual potential of different components of the system to improve the overall performance of the system relative to operational parameters. Operational parameters include the heat source temperature, heat sink temperature, and the difference between the absorption and condensation temperature. The results showed that by modifying and improving the performance of components, 18.5% of the total exergy destruction of the system could be reduced. The modified exergy efficiency reduces sharply (nearly 40%) with the rising heat sink temperature. The endogenous exergy destruction increases in all system components except the condenser and evaporator by the heat source temperature increase. With the increase in the heat sink temperature, the avoidable part of the total exergy destruction in the system increases due to the significant rise in the avoidable exogenous exergy destruction in the components, and the unavoidable endogenous exergy destruction decreases (more than 200%) in the absorber. Increasing the condensation temperature reduces the unavoidable endogenous exergy destruction in the components except for the low‐temperature heat exchanger.

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Section: System Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%