Investigating the performance of novel green solvents in absorption refrigeration cycles: Energy and exergy analyses

Haghbakhsh, Reza; Peyrovedin, Hamed; Raeissi, Sona; Duarte, Ana Rita C.; Shariati, Alireza

doi:10.1016/j.ijrefrig.2020.01.013

Cited by 31 publications

(17 citation statements)

References 31 publications

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“…Haghbakhsh et al 67 primarily applied DESs in absorption refrigeration as a potential working medium to investigate the feasibility of DESs in refrigeration cycles, where thermodynamic models consisting of the Non Random Two Liquid (NRTL) equation and the Soave−Redlich−Kwong (SRK) EOS were used to correlate the experimental result. The modified SRK-NRTL model is proved to fit well with the obtained experimental data of reline, ethaline, and glyceline.…”

Section: Synthesized and Thoroughly Studied 1-ethylimidazolium Ethyl ...mentioning

confidence: 99%

An Overview of Ammonia Separation by Ionic Liquids

Zhang

Dong

Zeng

et al. 2021

Ind. Eng. Chem. Res.

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Ammonia (NH3) is an important chemical in several fields, such as agriculture, pharmaceutical, material, and chemicals manufacturing. However, NH3 is a toxic gaseous pollutant and NH3 release results in environment pollution. Minimizing NH3 emission is of great significance for solving NH3-related environmental issues and promoting the reuse of NH3 resources. Ionic liquids (ILs) are energy-saving gas absorbents, because of their low vapor pressure, good chemical stability, and high NH3 solubility. The recent research progress of conventional, functionalized ILs and novel IL-based materials and solvents for NH3 separation was summarized. The effects of anions and cations on NH3 absorption capacity, as well as the absorption mechanism of ILs, were discussed in detail in this Review. The simulated dynamic parameters of NH3–IL systems including mass diffusivity, heat- and mass-transfer coefficient were also discussed. In addition, this Review summarized the industrial application achievement of ILs in NH3 separation and recovery from NH3-containing tail gas, which spans from simulation, pilot plant to industrial applications. Finally, the research trends in NH3 separation by IL-based systems were proposed based on existing research.

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Section: Synthesized and Thoroughly Studied 1-ethylimidazolium Ethyl ...mentioning

confidence: 99%

An Overview of Ammonia Separation by Ionic Liquids

Zhang

Dong

Zeng

et al. 2021

Ind. Eng. Chem. Res.

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“…Studies in the literature on absorption refrigeration cycles have determined that the work done by the pump is negligible in comparison to the amount of heat transfer in the regenerator [ 7 , 9 , 10 , 60 ]. Accordingly, the work done by the pump, W p , was neglected in this work.…”

Section: Resultsmentioning

confidence: 99%

“…Accordingly, the work done by the pump, W p , was neglected in this work. However, to make sure that this is indeed a valid assumption, the work done for pumping all three DES/water working pairs was calculated using Equation (32) [ 60 ].

where V is the volumetric flow rate of the solution, and η p is the efficiency of the pump.…”

Section: Resultsmentioning

confidence: 99%

Energy Conservation in Absorption Refrigeration Cycles Using DES as a New Generation of Green Absorbents

Haghbakhsh

Peyrovedin

Raeissi

et al. 2020

Entropy

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Deep eutectic solvents (DESs) are emerging green solvents with very unique characteristics. Their contribution to atmospheric pollution is negligible, and they can be “designed” for desired properties. In this study, the feasibility of applying DESs (Reline, Ethaline, or Glyceline) as absorbents in absorption refrigeration cycles was investigated. The sophisticated cubic-plus-association (CPA) equation of state, considering the strong intermolecular interactions of such complex systems, was used to estimate the thermodynamic properties. At a fixed set of base case operating conditions, the coefficients of performance were calculated to be 0.705, 0.713, and 0.716 for Reline/water, Ethaline/water, and Glyceline/water systems, respectively, while the corresponding mass flow rate ratios were 33.73, 11.53, and 16.06, respectively. Furthermore, the optimum operating conditions of each system were estimated. To verify the feasibility, results were compared to literature systems, including LiBr/water and various ionic liquid/water systems. The results indicate that DES/water working fluids have the potential to be used in such cycles. Since DESs have the characteristic to be tuned (designed) to desired properties, including their solvent power and their enthalpies of absorption, much further research needs to be done to propose new DESs with higher energy efficiencies.

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“…The E eva is calculated by the evaporation heat(P eva ), the evaporation temperature(T eva =T 6 ), and the environment temperature(T 0 =24.5℃). While the E gen is calculated by the generation heat(P gen ), the generation temperature(T gen =T 1 ), and the environment temperature(T 0 =24.5℃) [25].…”

Section: Calculation Methods Of Exergy Coefficient Of Performance (Ecop)mentioning

confidence: 99%

The Influence of Tio2 Nanoparticles and Libr on the Exergy Efficiency of Ammonia Absorption Refrigeration System under Different Working Temperatures

Jin¹,

Li²,

Du³

2022

International Conference on Fluid Flow, Heat and Mass Transfer

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The addition of TiO 2 nanoparticles and LiBr can increase the coefficient of performance(COP) of the ammonia water absorption, but the exergy efficiency has not been investigated. Therefore, this paper studied the influence of TiO 2 nanoparticles and LiBr on the exergy efficiency under different working temperatures. The results show that the addition of TiO 2 nanoparticles or LiBr can improve the ECOP of the ammonia-water absorption refrigeration system. There is optimal T gen , T eva for the NH 3 -H 2 O-LiBr-TiO 2 working fluid, which is 110℃, -13℃. In comparison, the ECOP decreases with the T cw increases. The maximum value of ECOP in this paper is 0.266 when the T eva , T gen , and T cw are -13℃, 110℃, and 28℃. Generally, applying NH 3 -H 2 O -LiBr -TiO 2 nanofluid working fluid can efficiently improve the ECOP of the absorption refrigeration system.

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Investigating the performance of novel green solvents in absorption refrigeration cycles: Energy and exergy analyses

Cited by 31 publications

References 31 publications

An Overview of Ammonia Separation by Ionic Liquids

An Overview of Ammonia Separation by Ionic Liquids

Energy Conservation in Absorption Refrigeration Cycles Using DES as a New Generation of Green Absorbents

The Influence of Tio2 Nanoparticles and Libr on the Exergy Efficiency of Ammonia Absorption Refrigeration System under Different Working Temperatures

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