Adsorption cold storage system with zeolite–water working pair used for locomotive air conditioning
The research paper presents a detailed study of an adsorption cold storage system utilizing a zeolite-water working pair, specifically designed for air conditioning in the driver’s cab of internal combustion locomotives. The authors, Y.Z. Lu, R.Z. Wang, M. Zhang, and S. Jiang, conducted both thermodynamic analyses and experimental investigations to evaluate the system's performance.
The study highlights the advantages of adsorption cold storage, including its large storage capacity and the absence of cold energy loss during the storage process. The system operates through a cycle that includes three main phases: generation, cold storage, and cold discharge. During the generation phase, the adsorbent bed is heated, allowing refrigerant vapor to be released and condensed. The cold storage phase involves cooling the adsorbent bed, while the cold discharge phase utilizes the stored cold energy to provide air conditioning.
Experimental results indicate that the system can achieve a refrigeration power output of approximately 4.1 kW, making it suitable for intermittent refrigeration needs, particularly when powered by low-grade thermal energy sources like industrial waste heat or solar energy. The authors also discuss the system's operational efficiency, noting that the cold discharge can be achieved through either air cooling or adiabatic processes.
The findings suggest that the zeolite-water adsorption cold storage system is effective for locomotive air conditioning, although improvements in heat and mass transfer within the adsorber are necessary for enhanced performance. The study concludes that this system is a viable option for utilizing low-grade thermal energy in refrigeration applications.
This research paper is significant in the field of thermal engineering and energy management, particularly in the context of sustainable refrigeration technologies. It contributes to ongoing discussions about energy efficiency and the utilization of renewable energy sources by demonstrating a practical application of adsorption cold storage systems. The findings are particularly relevant for industries seeking to reduce energy consumption and environmental impact, as the system operates with low-grade thermal energy and produces no pollution.
The research offers valuable insights for engineers and researchers interested in developing more efficient cooling systems, especially in transportation applications. By showcasing the potential of zeolite-water pairs in adsorption refrigeration, the article encourages further exploration and innovation in energy storage technologies.
