Comprehensive performance analysis and optimization of 1,3-dimethylimidazolylium dimethylphosphate-water binary mixture for a single effect absorption refrigeration system

Abstract

The energy and exergy analyses of the absorption refrigeration system (ARS) using H₂O-[mmim][DMP] mixture were investigated for a wide range of temperature. The equilibrium Dühring (P-T-X_IL) and enthalpy (h-T-X_IL) of mixture were assessed using the excess Gibbs free non-random two liquid (NRTL) model for a temperature range of 20°C to 140°C and X_IL from 0.1 to 0.9. The performance validation of the ARS cycle showed a better coefficient of performance (COP) of 0.834 for H₂O-[mmim][DMP] in comparison to NH₃-H₂O, H₂O-LiBr, H₂O-[emim][DMP], and H₂O-[emim][BF4]. Further, ARS performances with various operating temperatures of the absorber (T_a), condenser (T_c), generator (T_g), and evaporator (T_e) were simulated and optimized for a maximum COP and exergetic COP (ECOP). The effects of T_g from 50°C to 150°C and T_a and T_c from 30°C to 50°C on COP and ECOP, the X_a, X_g, and circulation ratio (CR) of the ARS were evaluated and optimized for T_e from 5°C to 15°C. The optimization revealed that T_g needed to achieve a maximum COP which was more than that for a maximum ECOP. Therefore, this investigation provides criteria to select low grade heat source temperature. Most of the series flow of the cases of cooling water from the condenser to the absorber was found to be better than the absorber to the condenser.

Graphical abstract

Keywords

ionic liquid driven absorption cycle / H₂O-[mmim][DMP] / coefficient of performance (COP) / exergy analysis / thermodynamics mixture property

References

[1] Fernandes M S, Brites G J V N, Costa J J, Review and future trends of solar adsorption refrigeration systems. Renewable & Sustainable Energy Reviews, 2014, 39: 102–123

[2] Sleiti A K. Tidal power technology review with potential applications in Gulf Stream. Renewable & Sustainable Energy Reviews, 2017, 69: 435–441

[3] Sleiti A K, Al-Ammari W A, Al-Khawaja M. Review of innovative approaches of thermo-mechanical refrigeration systems using low grade heat. International Journal of Energy Research, 2020, 44(13): 9808–9838

[4] Takalkar G. Simulation and experimental study of heat based refrigeration cycles. Dissertation for the Doctoral Degree. India: Institute of Chemical Technology, 2013

[5] Sleiti A K, Al-ammari W A, Al-khawaja M. A novel solar integrated distillation and cooling system – design and analysis. Solar Energy, 2020, 206: 68–83

[6] Sarbu I, Sebarchievici C. Review of solar refrigeration and cooling systems. Energy and Buildings, 2013, 67: 286–297

[7] Shublaq M, Sleiti A K. Experimental analysis of water evaporation losses in cooling towers using filters. Applied Thermal Engineering, 2020, 175: 115418

[8] Sun Y, Di G, Wang J, Gaseous solubility and thermodynamic performance of absorption system using R1234yf/IL working pairs. Applied Thermal Engineering, 2020, 172: 115161

[9] Perez-Astudillo D, Bachour D. DNI, GHI and DHI ground measurements in Doha, Qatar. Energy Procedia, 2014, 49: 2398–2404

[10] Bachour D, Perez-Astudillo D. Ground-measurement GHI map for Qatar. Energy Procedia, 2014, 49: 2297–2302

[11] Papadopoulos A I, Kyriakides A S, Seferlis P, Absorption refrigeration processes with organic working fluid mixtures—a review. Renewable & Sustainable Energy Reviews, 2019, 109: 239–270

[12] Boman D B, Hoysall D C, Staedter M A, A method for comparison of absorption heat pump working pairs. International Journal of Refrigeration, 2017, 77: 149–175

[13] Shiflett M B, Yokozeki A. Solubility and diffusivity of hydrofluorocarbons in room-temperature ionic liquids. AIChE Journal, 2006, 52(3): 1205–1219

[14] Yokozeki A, Shiflett M B. Ammonia solubilities in room temperatures ionic liquids. Industrial & Engineering Chemistry Research, 2007, 46: 1605–1610

[15] Shiflett M B, Yokozcki A. Absorption cycle utilizing ionic liquids and water as working fluids. US patent: US-8715521-BZ, 2005

[16] Mehari A, Xu Z Y, Wang R Z. Thermal energy storage using absorption cycle and system: a comprehensive review. Energy Conversion and Management, 2020, 206: 112482

[17] Parab P, Takalkar G, Bhagwat S. Vapour liquid equilibrium of Potassium formate–water: measurements and correlation by e-NRTL model. Indian Chemical Engineer, 2019, 61(4): 361–373

[18] Wu W, You T, Leung M. Screening of novel water/ionic liquid working fluids for absorption thermal energy storage in cooling systems. International Journal of Energy Research, 2019, 44(12): 9367–9381

[19] Takalkar G D, Bhosale R R, Mali N A, Thermodynamic analysis of EMISE–water as a working pair for absorption refrigeration system. Applied Thermal Engineering, 2019, 148: 787–795

[20] Liu X, Bai L, Liu S, Vapor-liquid equilibrium of R1234yf/[HMIM][Tf₂N] and R1234ze(E)/[HMIM][Tf₂N] working pairs for the absorption refrigeration cycle. Journal of Chemical & Engineering Data, 2016, 61(11): 3952–3957

[21] Wu W, Zhang H, You T, Thermodynamic investigation and comparison of absorption cycles using hydrofluoroolefins and ionic liquid. Industrial & Engineering Chemistry Research, 2017, 56(35): 9906–9916

[22] Kim S, Kohl P A. Theoretical and experimental investigation of an absorption refrigeration system using R134/[bmim][PF₆] working fluid. Industrial & Engineering Chemistry Research, 2013, 52(37): 13459–13465

[23] Shiflett M B, Yokozeki A. Solubility and diffusivity of hydrofluorocarbons in room-temperature ionic liquids. AIChE Journal, 2006, 52(3): 1205–1219

[24] Wang M, Infante Ferreira C A. Absorption heat pump cycles with NH₃ – ionic liquid working pairs. Applied Energy, 2017, 204: 819–830

[25] Chen W, Bai Y. Thermal performance of an absorption-refrigeration system with [emim]Cu₂Cl₅/NH₃ as working fluid. Energy, 2016, 112: 332–341

[26] Takalkar G D, Bhosale R R, Mali N A, Energetic and exergetic performance of NH₃-H₂O-based absorption refrigeration cycle: effect of operating factor. International Journal of Exergy, 2020, 31(4): 352

[27] Zhang B, Chen W, Sun Q, Numerical evaluation of thermal performances of diffusion–absorption refrigeration using 1,3-dimethylimidazolylium dimethylphosphate/methanol/helium as working fluid. Energy Conversion and Management, 2017, 152: 201–213

[28] He Z, Zhao Z, Zhang X, Thermodynamic properties of new heat pump working pairs: 1,3-dimethylimidazolium dimethylphosphate and water, ethanol and methanol. Fluid Phase Equilibria, 2010, 298(1): 83–91

[29] Chen W, Liang S. Thermodynamic analysis of absorption heat transformers using [mmim]DMP/H₂O and [mmim]DMP/CH₃OH as working fluids. Applied Thermal Engineering, 2016, 99: 846–856

[30] Zheng D, Dong L, Huang W, A review of imidazolium ionic liquids research and development towards working pair of absorption cycle. Renewable & Sustainable Energy Reviews, 2014, 37: 47–68

[31] Popp S, Bösmann A, Wölfel R, Screening of ionic liquid/H₂O working pairs for application in low temperature driven sorption heat pump systems. ACS Sustainable Chemistry & Engineering, 2015, 3(4): 750–757

[32] Wang M, Becker T M, Infante Ferreira C A. Assessment of vapor–liquid equilibrium models for ionic liquid based working pairs in absorption cycles. International Journal of Refrigeration, 2018, 87: 10–25

[33] Kim S, Kohl P A. Analysis of [hmim][PF₆] and [hmim][Tf₂N] ionic liquids as absorbents for an absorption refrigeration system. International Journal of Refrigeration, 2014, 48: 105–113

[34] Sujatha I, Venkatarathnam G. Performance of a vapour absorption heat transformer operating with ionic liquids and ammonia. Energy, 2017, 141: 924–936

[35] Chen W, Xu C, Wu H, Energy and exergy analyses of a novel hybrid system consisting of a phosphoric acid fuel cell and a triple-effect compression–absorption refrigerator with [mmim]DMP/CH₃OH as working fluid. Energy, 2020, 195: 116951

[36] Wu W, Leung M, Ding Z, Comparative analysis of conventional and low-GWP refrigerants with ionic liquid used for compression-assisted absorption cooling cycles. Applied Thermal Engineering, 2020, 172: 115145

[37] Dong L, Zheng D, Nie N, Performance prediction of absorption refrigeration cycle based on the measurements of vapor pressure and heat capacity of H₂O+[DMIM]DMP system. Applied Energy, 2012, 98: 326–332

[38] Anand S, Gupta A, Tyagi S K, An absorption chiller system using lithium bromide and water as working fluids: exergy analysis. ASHRAE Transactions, 2014, 120: 226–239

[39] Kim Y J, Gonzalez M. Exergy analysis of an ionic-liquid absorption refrigeration system utilizing waste-heat from datacenters. International Journal of Refrigeration, 2014, 48: 26–37

[40] Ayou D S, Currás M R, Salavera D, Performance analysis of absorption heat transformer cycles using ionic liquids based on imidazolium cation as absorbents with 2,2,2-trifluoroethanol as refrigerant. Energy Conversion and Management, 2014, 84: 512–523

[41] Swarnkar S K, Srinivasa Murthy S, Performance of a vapour absorption refrigeration system operating with ionic liquid-ammonia combination with water as cosolvent. Applied Thermal Engineering, 2014, 72(2): 250–257

[42] Wagner W, Pruß A. The IAPWS formulation 1995 for the thermodynamic properties of ordinary water substance for general and scientific use. Journal of Physical and Chemical Reference Data, 2002, 31(2): 387

[43] Abumandour E S, Mutelet F, Alonso D. Performance of an absorption heat transformer using new working binary systems composed of {ionic liquid and water}. Applied Thermal Engineering, 2016, 94: 579–589

[44] Kamali M, Parham K, Assadi M. Performance analysis of a single stage absorption heat transformer-based desalination system employing a new working pair of (EMIM) (DMP)/H₂O. International Journal of Energy Research, 2018, 42(15): 4790–4804

[45] Yokozeki A. Theoretical performances of various refrigerant-absorbent pairs in a vapor-absorption refrigeration cycle by the use of equations of state. Applied Energy, 2005, 80(4): 383–399

[46] Shiflett M B, Yokozeki A. Absorption cycle utilizing ionic liquids and water as working fluids. US Patent Application 20070144186, 2006

[47] Takalkar G. Thermodynamic properties and performance evaluation of [EMIM] [DMP]-H₂O working pair for absorption cooling cycle. International Journal of Energy Research, 2019,44(15): 12269–12283

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