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LiBr, LiNO3and NaOH are three widely used additions that can significantly improve the performance of ammonia absorption heat pumpcycle. To compare the enhancementsof using different additions,Aspen plus process monitor is appliedto simulate the performance ofternary NH3-H2O-salt absorption heat pump. Theresults indicateLiBr heighten theperformance most, 16.52% higher than ternarycycle. However, the existence of additions has an adverse effect on absorption process because it decreases the absorption capacity of the ternary working fluid. To avoid the negative effect, electrodialysis techniqueis employed to separate additionsfrom absorber to generator. The new models of NH3-H2O-saltabsorption heat pump combinedwith electrodialysis device areestablished and simulated in Aspen plus process monitor. The results showthat, LiBr can increase the COP of new absorption heat pump cycle up to 12.36%, highestin the three additions compared with traditional cycle.
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Details
- Original title: Performance analysis of different ternary NH3-H2O-salt absorption heat pump cycle combined with electrodialysis technique.
- Record ID : 30026118
- Languages: English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Publication date: 2019/08/24
- DOI: http://dx.doi.org/10.18462/iir.icr.2019.1503
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Indexing
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Themes:
Heat pumps techniques;
Absorption and adsorption systems - Keywords: Hydroxide; Lithium bromide; Ammonia-water; Absorption; Sodium; Simulation; Heat pump; Nitrate; Cycle; COP
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