First law analysis of a novel double effect air-cooled non-adiabatic ammonia/salt absorption refrigeration cycle

For an absorption cycle, a ternary working pair LiBr–[BMIM]Cl(2.5:1)/H2O was proposed as a new working pair to replace LiBr/H2O. The thermodynamic properties including specific heat capacity, specific enthalpy, density, and viscosity were systematically measured and fitted by the least-squares method. The thermodynamic performance of a double-effect absorption refrigeration cycle based on LiBr–[BMIM]Cl(2.5:1)/H2O was investigated under different refrigeration temperatures from 5 °C to 12 °C. Results showed that the ternary working pair LiBr–[BMIM]Cl(2.5:1)/H2O had advantages in the operating temperature range and corrosivity. Compared with LiBr/H2O, the operating temperature range was 20 °C larger, and the corrosion rates of carbon steel and copper were reduced by more than 50% at 453.15 K. However, the double-effect absorption refrigeration cycle with LiBr–[BMIM]Cl(2.5:1)/H2O achieved a coefficient of performance (COPc) from 1.09 to 1.46 and an exergetic coefficient of performance (ECOPc) from 0.244 to 0.238, which were smaller than those based on LiBr/H2O due to the higher generation temperature and larger flow ratio.

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Thermodynamic modelling of a double-effect LiBr-H2O absorption refrigeration cycle

Heat and Mass Transfer ◽

10.1007/s00231-012-1045-3 ◽

2012 ◽

Vol 48 (12) ◽

pp. 2113-2123 ◽

Cited By ~ 11

Author(s):

A. Iranmanesh ◽

M. A. Mehrabian

Keyword(s):

Double Effect ◽

Thermodynamic Modelling ◽

Refrigeration Cycle ◽

Absorption Refrigeration

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Corrigendum to “First and second law analysis of ammonia/salt absorption refrigeration systems” [International Journal of Refrigeration 40 (2014) 111–121]

International Journal of Refrigeration ◽

10.1016/j.ijrefrig.2019.09.014 ◽

2020 ◽

Vol 109 ◽

pp. 210-211

Author(s):

L. Garousi Farshi ◽

C.A. Infante Ferreira ◽

S.M.S. Mahmoudi ◽

M.A. Rosen

Keyword(s):

Second Law ◽

Absorption Refrigeration ◽

Salt Absorption ◽

Second Law Analysis ◽

Ammonia Salt

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Investigating the effect of using nanofluids on the performance of a double-effect absorption refrigeration cycle combined with a solar collector

Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy ◽

10.1177/0957650919889811 ◽

2019 ◽

Vol 234 (7) ◽

pp. 981-993 ◽

Cited By ~ 3

Author(s):

Mohamad Aramesh ◽

Fathollah Pourfayaz ◽

Mehdi Haghir ◽

Alibakhsh Kasaeian ◽

Mohammad H Ahmadi

Keyword(s):

Heat Transfer ◽

Ag Nanoparticles ◽

Pure Water ◽

Double Effect ◽

Heat Transfer Fluid ◽

Working Fluid ◽

Inlet Temperature ◽

Refrigeration Cycle ◽

Outlet Temperature ◽

Absorption Refrigeration

In this article, the performance of a double-effect LiBr-H2O absorption refrigeration cycle is studied and is improved by applying solar energy and utilizing nanofluids. A trough collector is used to preheat the working fluid before entering the generator of the cycle. In addition, four different nanofluids are considered as the heat transfer fluid of the collector: Al2O3, Ag, Cu, and CuO. The effects of using nanofluids on the outlet temperature of the heat transfer fluid, the temperature of the working fluid entering the generator, the heat produced by the generator, and COP of the cycle are studied. Different concentrations of the nanoparticles from 0 to 2.5% are considered for the nanofluids. The results indicate that in all the concentrations, Ag nanoparticles will have a better performance comparing to the other types. Furthermore, it was concluded that the higher concentrations of the nanoparticles and along with it the higher inlet temperature of the generator will decrease the generator heat production rate up to 4%. Moreover, considering the constant cooling capacity of the cycle, usage of the Ag nanoparticles in the concentration of 2.5% increases the value of COP up to 3.9%, with respect to the pure water.

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