Working fluid selection for a high efficiency integrated power/cooling system combining an organic Rankine cycle and vapor compression-absorption cycles

Ngangué, Max Ndame; Lekané, Nelson Nguefack; Njock, Julbin Paul; Sosso, Olivier Thierry; Stouffs, Pascal

doi:10.1016/j.energy.2023.127709

Cited by 8 publications

(1 citation statement)

References 32 publications

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“…Additionally, a sensitivity analysis of various parameters was conducted to examine how they affect the cycle's performance. Ngangue´ et al [30] presented the assessment of various combinations of working fluids for a novel heat recovery cogeneration system. This system combines an organic Rankine cycle, a vapor absorption cycle and a vapor compression cycle.…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic based comparative analysis between NH3-NaSCN single effect absorption cycle, combined compression-absorption refrigeration and combined ejector-absorption refrigeration cycles powered by solar panel

Rabiei,

Borji,

Kazemi

2024

Preprint

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Solar cooling is environmentally friendly and relies on solar energy to meet cooling needs. In recent years, absorption chillers have gained interest as a sustainable alternative to vapor compression chillers using eco-friendly refrigerants. However, a major problem with simple absorption systems is their low coefficient of performance. As a result, researchers are exploring ways to improve their thermoeconomic efficiency. In this research, three different configurations of absorption cycles are compared and analyzed from exergetic and exergoeconomic points of view. These configurations include the simple absorption cycle, the combined ejector-absorption cycle, and the combined compression-absorption cycle, as well as a flat plate solar collector and a storage tank. Ammonia sodium thiocyanate is used as the working solution. In both combined cycles, the absorber operates at intermediate pressure, allowing three pressure levels to be considered. The simulations are carried out using EES software. The results show that the solar collector should be considered more than other components in terms of exergy and exergoeconomic. It is observed that for the same pressure ratio of ejector and compressor, the exergy efficiency of the ejector cycle is slightly higher than that of the compression cycle. Also, in most cases, the results show improved performance in the combined solar compression cycle by increasing the compressor pressure ratio compared to the other cycles. It has also been shown that increasing the pressure ratio of the ejector and compressor improves the exergoeconomic performance of the combined cycles compared to the simple absorption cycle.

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Section: Introductionmentioning

confidence: 99%