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Efficiency of a lithium bromide absorption chiller operating on the combined cycle

DOI: 10.17586/1606-4313-2025-24-4-19-27
UDC 621.574.013–932.2

Efficiency of a lithium bromide absorption chiller operating on the combined cycle

Abramov Vladislav I., Olga S. Malinina

For citation: Abramov V.I., Malinina O.S. Efficiency of a lithium bromide absorption chiller operating on the combined cycle. Journal of International Academy of Refrigeration. 2025. No 4. p. 19-27. DOI: 10.17586/1606-4313-2025-24-4-19-27 (in Russian)]

Abstract
This paper presents a numerical evaluation of the efficiency of the combined LBAC cycle that integrates cycles with two-stage generation and two-stage absorption. The authors of the article analyzed the second type of the thermodynamicsystem, in which the implementation of these two-stage cycles occurs in individual solution circuits interconnected with each other. According to the mathematical modeling results, it was found out that the thermal coefficient of the studied cycle,depending on the parameters of external heat sources, is in the range of 0.44÷0.50, and a heating source with a lower temperature level (from 62.7 °C to 96.1 °C) is required to drive this cycle, unlike the single-stage (basic) cycle. Another benefit demonstrating the efficiency of LBAC operation on the combined cycle is that this LBAC has a more advantageous performance characteristic in terms of cold accumulation compared to the single-stage machine. Thus,the use of LBAC with the studied cycle is appropriate in systems where there is a need to accumulate excess refrigeration energy (install a cold storage battery) in compliance with production requirements.

Keywords: lithium bromide absorption chiller, LBAC, combined cycle, two-stage generation, two-stage absorption, heating source, thermal coefficient.

All references

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Efficiency of a lithium bromide absorption chiller operating on the combined cycle

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