Publisher

UNPUNP

Journal TeknomekanikTeknomekanik Abstract

In high temperature and high humidity zones, evaporative cooling is ineffective and vapour compression systems are less energy efficient. Therefore, an alternative system is highly desirable which is effective, energy efficient and enables the use of cheap and sustainable energy sources. Indirect evaporative cooling helps in retaining humidity level of air, but is less effective in attaining lower air temperatures. To mitigate this challenge, M-cycle indirect evaporative cooling system helps in achieving sub-wet bulb temperatures. In this work, performance of a novel modified indirect evaporative M-cycle cooling system assisted by 40% aqueous Li-Cl liquid desiccant is experimentally investigated against various parameters. The cooling system used in this study is a single unit system which can perform liquid desiccant dehumidification and internal cooling to the liquid desiccant. With an air velocity of 1 m/s at the inlet, the introduction of openings in between inlet and exit of the cooling system has shown a maximum improvement of 19.2% in its dew point effectiveness, with unaffected dehumidification effectiveness. Furthermore, it is observed that the dew point effectiveness is decreased with the increasing distance of openings from the inlet. The investigated cooling and dehumidification system is useful as a pre-air-conditioner to conventional air-conditioning systems and also as a stand-alone air-conditioning system.

Conclusion

The experimental investigation of a Li-Cl liquid desiccant assisted M-cycle indirect evaporative cooler revealed the impact of various parameters on its performance.Increasing the working air to product air ratio enhanced dew point effectiveness without affecting dehumidification effectiveness.Liquid desiccant flow length initially improved dew point effectiveness but decreased beyond a certain point, while consistently enhancing dehumidification effectiveness.The system demonstrates potential as a pre-air conditioner or standalone unit.

Future Research

Further research should focus on optimizing the design of the bypass openings, exploring different shapes and arrangements to maximize cooling performance. Investigating the use of alternative liquid desiccants with improved properties, such as lower corrosivity or higher hygroscopicity, could enhance the systems efficiency and longevity. Additionally, a comprehensive economic analysis, including lifecycle cost assessment, is needed to evaluate the feasibility of implementing this technology on a larger scale and compare it with conventional air conditioning systems. Finally, exploring the integration of renewable energy sources, such as solar thermal energy, to regenerate the liquid desiccant could further reduce the systems environmental impact and operating costs, making it a more sustainable cooling solution. These studies should consider varying climatic conditions to assess the systems adaptability and performance in diverse environments.

References

1. Validate User. validate user sorry experiencing unusual traffic time please help confirm robot take content... academic.oup.com/ijlct/article-lookup/doi/10.1093/ijlct/ctv032Validate User validate user sorry experiencing unusual traffic time please help confirm robot take content academic oup ijlct article lookup doi 10 1093 ijlct ctv032
2. Comparison of NaOH and Na2CO3 as absorbents for CO2 absorption in carbon capture and storage technology... jerel.rlsociety.org/index.php/jerel/article/view/23Comparison of NaOH and Na2CO3 as absorbents for CO2 absorption in carbon capture and storage technology jerel rlsociety index php jerel article view 23

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