Thermodynamic investigation of LiCl-H2O working pair in a double effect absorption chiller driven by parabolic trough collectors

Abstract In this study, an alternative working pair, the LiCl-H 2 O is investigated in a double-effect absorption chiller which is powered by parabolic trough collectors. Moreover, the conventional working fluid LiBr-H 2 O is examined under the same operating conditions in order to perform a suitable comparison. Three different condensation temperature levels are examined (30 °C–35 °C–40 °C) and four evaporating temperature levels (5.0 °C–7.5 °C–10.0 °C–12.5 °C), while the generator temperature varies in the allowed range in every case. The analysis is performed in steady state conditions with EES (Engineering Equator Solver). The final results indicate that the solar cooling performance is 8% higher with the LiCl-H 2 O compared to the operation with LiBr-H 2 O. This significant performance enhancement is able to make the solar cooling a more sustainable solution using LiCl-H 2 O. Furthermore, the demanded specific collecting area is calculated close to 1 m 2 ·kW −1 which is a relatively low value. This result is based on the high thermal efficiency of the parabolic trough collectors and on the increased performance of the operation with LiCl-H 2 O.

[1]  Manuel Castro,et al.  Exergy efficiency analysis in buildings climatized with LiCl–H2O solar cooling systems that use swimming pools as heat sinks , 2011 .

[2]  Ahmet Lokurlu.  Configurations of Worldwide First Solar Cooling Systems Using Parabolic Trough Collectors on Locations in Turkey , 2008 .

[3]  Mortaza Yari,et al.  Evaluation and Optimization of Single Stage Absorption Chiller Using (LiCl + H2O) as the Working Pair , 2013 .

[4]  F. Rosa,et al.  Solar absorption cooling plant in Seville , 2010 .

[5]  Muhsin Kilic,et al.  Second law-based thermodynamic analysis of water-lithium bromide absorption refrigeration system , 2007 .

[6]  Xiaosong Zhang,et al.  A novel low-grade heat-driven absorption refrigeration system with LiCl–H2O and LiBr–H2O working pairs , 2015 .

[7]  Sumana Ghosh,et al.  CFD simulation of steam condensation in a subcooled water pool , 2017 .

[8]  K. A. Antonopoulos,et al.  An innovative Trombe wall as a passive heating system for a building in Athens—A comparison with the conventional Trombe wall and the insulated wall , 2016 .

[9]  K. A. Antonopoulos,et al.  Energetic and financial investigation of a stand-alone solar-thermal Organic Rankine Cycle power plant , 2016 .

[10]  M. P. Maiya,et al.  Thermodynamic comparison of water-based working fluid combinations for a vapour absorption refrigeration system , 1998 .

[11]  Ahmed Y. Taha Al-Zubaydi.  Solar Air Conditioning and Refrigeration with Absorption Chillers Technology in Australia – An Overview on Researches and Applications , 2011 .

[12]  Marc A. Rosen,et al.  Analysis of crystallization risk in double effect absorption refrigeration systems , 2011 .

[13]  R. Petela.  Exergy of undiluted thermal radiation , 2003 .

[14]  J. Vargas,et al.  A single stage absorption refrigeration system dynamic mathematical modeling, adjustment and experimental validation , 2016 .

[15]  Francesco Calise,et al.  Experimental analysis and dynamic simulation of a novel high-temperature solar cooling system , 2016 .

[16]  Uday Kumar,et al.  A novel solar thermal polygeneration system for sustainable production of cooling, clean water and domestic hot water in United Arab Emirates: Dynamic simulation and economic evaluation , 2016 .

[17]  Reinhard Radermacher,et al.  Absorption Chillers and Heat Pumps , 1996 .

[18]  T. K. Gogoi,et al.  Exergy analysis of a H2O–LiCl absorption refrigeration system with operating temperatures estimated through inverse analysis , 2016 .

[19]  D. Zeng,et al.  Phase diagrams and thermochemical modeling of salt lake brine systems. I. LiCl+H2O system , 2015 .

[20]  Dimitrios M. Korres,et al.  Thermal and optical efficiency investigation of a parabolic trough collector , 2015 .

[21]  B. Guendouz,et al.  An illustrated review on solar absorption cooling experimental studies , 2016 .

[22]  Yan Li,et al.  Estimating solar energy potentials on pitched roofs , 2017 .

[23]  Agis M. Papadopoulos,et al.  Solar cooling system using concentrating collectors for office buildings: A case study for Greece , 2016 .

[24]  J. Pátek,et al.  A computationally effective formulation of the thermodynamic properties of LiBr-H2O solutions from 273 to 500 K over full composition range , 2006 .

[25]  Paul Rowley,et al.  Towards low carbon homes – a simulation analysis of building-integrated air-source heat pump systems , 2012 .

[26]  K. F. Fong,et al.  Simulation–optimization of solar–thermal refrigeration systems for office use in subtropical Hong Kong , 2011 .

[27]  Stephen White,et al.  A systematic parametric study and feasibility assessment of solar-assisted single-effect, double-effect, and triple-effect absorption chillers for heating and cooling applications , 2016 .

[28]  Jaroslav Pátek,et al.  Thermodynamic properties of the LiCl–H2O system at vapor–liquid equilibrium from 273 K to 400 K , 2008 .

[29]  K. A. Antonopoulos,et al.  Energetic and financial evaluation of solar assisted heat pump space heating systems , 2016 .

[30]  Khaled M. Bataineh,et al.  Review and recent improvements of solar sorption cooling systems , 2016 .

[31]  Arif Hepbasli,et al.  Experimental exergetic performance evaluation of a novel solar assisted LiCl–H2O absorption cooling system , 2014 .

[32]  K. A. Antonopoulos,et al.  Exergetic and energetic comparison of LiCl-H2O and LiBr-H2O working pairs in a solar absorption cooling system , 2016 .

[33]  F. A. Holland,et al.  Ammonia/lithium nitrate absorption/compression refrigeration cycle. Part II. experimental , 1998 .

[34]  Nahla Bouaziz,et al.  Energy and exergy investigation of a novel double effect hybrid absorption refrigeration system for solar cooling , 2015 .

[35]  Tarik Kousksou,et al.  Solar driven cooling systems: An updated review , 2015 .

[36]  K. A. Antonopoulos,et al.  Exergetic, energetic and financial evaluation of a solar driven absorption cooling system with various collector types , 2016 .

[37]  Evangelos Bellos,et al.  Parametric investigation of nanofluids utilization in parabolic trough collectors , 2017 .

[38]  Zeyu Li,et al.  Performance analysis of solar air cooled double effect LiBr/H2O absorption cooling system in subtropical city , 2014 .