International Journal of Energy Research

Volume 44, Issue 13 pp. 10394-10413

RESEARCH ARTICLE

Thermodynamic performance of absorption-compression hybrid refrigeration cycles based on lithium nitrate+1-butyl-3-methylimidazolium nitrate/water working fluid

Yanan Wang,

Yanan Wang

School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China

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Na Li,

Na Li

R&D Center of Science and Technology, State Grid Energy Conservation Service Co., Ltd., Beijing, China

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Chunhuan Luo,

Corresponding Author

Chunhuan Luo

[email protected]

orcid.org/0000-0003-2789-4414

School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China

Beijing Key Laboratory of Energy Conservation and Emission Reduction for Metallurgical Industry, Beijing, China

Correspondence

Chunhuan Luo, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.

Email: [email protected]

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Yanan Wang,

Yanan Wang

School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China

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Na Li,

Na Li

R&D Center of Science and Technology, State Grid Energy Conservation Service Co., Ltd., Beijing, China

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Chunhuan Luo,

Corresponding Author

Chunhuan Luo

[email protected]

orcid.org/0000-0003-2789-4414

School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China

Beijing Key Laboratory of Energy Conservation and Emission Reduction for Metallurgical Industry, Beijing, China

Correspondence

Chunhuan Luo, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.

Email: [email protected]

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First published: 08 July 2020

https://doi.org/10.1002/er.5661

Citations: 10

Funding information: CSC Scholarship, Grant/Award Number: 201706465071; Fundamental Research Funds for the Center Universities, Grant/Award Number: FRF-TP-18-010A3; National Natural Science Foundation of China, Grant/Award Number: 51506005

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Summary

In this paper, LiNO₃ (lithium nitrate)-[BMIM]NO₃ (1-butyl-3-methylimidazolium nitrate)/H₂O is presented for absorption-compression hybrid refrigeration. The thermophysical properties and corrosion of this ternary system were measured. The performance of this hybrid system using LiNO₃-[BMIM]NO₃/H₂O was studied and compared with those based on LiBr (lithium bromide)/H₂O, LiNO₃/H₂O, and LiNO₃-[MMIM][DMP] (1,3-dimethylimidazolium dimethylphosphate)/H₂O. Results showed that the hybrid refrigeration cycles can work at much lower generator and evaporator temperatures in comparison with the pure absorption cycle. Generator temperatures of both hybrid cycles based on this working fluid were lower than those using the other working fluids. At different refrigeration temperatures, the generator temperatures of both hybrid cycles using this presented working fluid were reduced about 7 and 10 K, respectively, in comparison with those based on LiBr/H₂O. Compared with other working fluids, both single- and double-effect hybrid systems using this new working fluid achieved a larger coefficient of performance around 0.88 and 1.6, respectively. Additionally, the exergetic efficiency for both hybrid cycles is also about 10% larger than that using LiBr/H₂O. And this working fluid shows an excellent thermal stability below 598.32 K and acceptable high-temperature anti-corrosion to metallic materials. Moreover, the hybrid cycle using LiNO₃-[BMIM]NO₃/H₂O of 80 kW has a shorter payback period of 5.51 years when utilizing solar energy as the driven heat source. Therefore, LiNO₃-[BMIM]NO₃/H₂O shows great advantages in the absorption-compression hybrid cycles.

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Thermodynamic performance of absorption-compression hybrid refrigeration cycles based on lithium nitrate+1-butyl-3-methylimidazolium nitrate/water working fluid

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Thermodynamic performance of absorption-compression hybrid refrigeration cycles based on lithium nitrate+1-butyl-3-methylimidazolium nitrate/water working fluid

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