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Graphical analysis on internal heat recovery of a single stage ammonia–water absorption refrigeration system

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  • Du, S.
  • Wang, R.Z.
  • Xia, Z.Z.

Abstract

The internal heat recovery has great influence on the performance of an ammonia water absorption refrigeration system. This paper presents an intuitional graphical analysis to identify the characteristics of different cycles with different internal heat recovery strategies and to find out the key points which have significant influence on internal heat recovery. The different cycles can be illustrated clearly in a temperature–heat load diagram with the system construction and the energy target so that the better one can be obtained. And the optimal one can be verified from the comparison. The feed condition and the size of the pocket of the background process are regarded as the key points of internal heat integration for the reduction of the system heat input. The results show that saturated feed condition is the optimal feed condition due to the minimum irreversible loss of heat and mass transfer and reducing the heat flow rate in the pocket of the background process contributes to the heat integration between the column and background processes. The two key points on internal heat recovery can be the operating direction on internal heat recovery for system performance improvement.

Suggested Citation

  • Du, S. & Wang, R.Z. & Xia, Z.Z., 2015. "Graphical analysis on internal heat recovery of a single stage ammonia–water absorption refrigeration system," Energy, Elsevier, vol. 80(C), pages 687-694.
  • Handle: RePEc:eee:energy:v:80:y:2015:i:c:p:687-694
    DOI: 10.1016/j.energy.2014.12.024
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    References listed on IDEAS

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    Cited by:

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    4. Muhsin Kılıç, 2022. "Evaluation of Combined Thermal–Mechanical Compression Systems: A Review for Energy Efficient Sustainable Cooling," Sustainability, MDPI, vol. 14(21), pages 1-38, October.
    5. Chen, X. & Wang, R.Z. & Du, S., 2017. "An improved cycle for large temperature lifts application in water-ammonia absorption system," Energy, Elsevier, vol. 118(C), pages 1361-1369.
    6. Alvaro A. S. Lima & Gustavo de N. P. Leite & Alvaro A. V. Ochoa & Carlos A. C. dos Santos & José A. P. da Costa & Paula S. A. Michima & Allysson M. A. Caldas, 2020. "Absorption Refrigeration Systems Based on Ammonia as Refrigerant Using Different Absorbents: Review and Applications," Energies, MDPI, vol. 14(1), pages 1-41, December.
    7. Chen, X. & Wang, R.Z. & Du, S., 2017. "Heat integration of ammonia-water absorption refrigeration system through heat-exchanger network analysis," Energy, Elsevier, vol. 141(C), pages 1585-1599.
    8. Du, S. & Wang, R.Z. & Chen, X., 2017. "Development and experimental study of an ammonia water absorption refrigeration prototype driven by diesel engine exhaust heat," Energy, Elsevier, vol. 130(C), pages 420-432.
    9. Jia, Teng & Dou, Pengbo & Chen, Erjian & Dai, Yanjun, 2022. "Feasibility and performance analysis of a hybrid GAX-based absorption-compression heat pump system for space heating in extremely cold climate conditions," Energy, Elsevier, vol. 242(C).
    10. Ge, T.S. & Wang, R.Z. & Xu, Z.Y. & Pan, Q.W. & Du, S. & Chen, X.M. & Ma, T. & Wu, X.N. & Sun, X.L. & Chen, J.F., 2018. "Solar heating and cooling: Present and future development," Renewable Energy, Elsevier, vol. 126(C), pages 1126-1140.
    11. Du, S. & Wang, R.Z., 2019. "A unified single stage ammonia-water absorption system configuration with producing best thermal efficiencies for freezing, air-conditioning and space heating applications," Energy, Elsevier, vol. 174(C), pages 1039-1048.

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