Hu Yu, Xu Weiqing, Jia Guanwei, Li Guangyao, Cai Maolin
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China.
Pneumatic and Thermodynamic Energy Storage and Supply Beijing Key Laboratory, Beijing 100191, China.
Entropy (Basel). 2022 Jul 27;24(8):1035. doi: 10.3390/e24081035.
Energy saving is one of the main technique routes for net zero carbon emissions. Air compressor systems take up a large part of energy consumption in the industrial field. A pre-cooling air compressor system was proposed for energy saving by cooling the air before it flows in a compressor. The energy efficiency of the proposed system was analyzed. As additional energy consumption is required for air cooling, the feasibility of the pre-cooling method for energy saving was analyzed. As the efficiency of the pre-cooling air compressor system is mainly influenced by the environment temperature and humidity, applicability of the system in different regions and at different seasons was discussed. A pilot project was performed to verify the technical feasibility and economics of the proposed system. When the precooling temperature of the pilot system was set to 2 °C, the annual pneumatic-electrical ratio of the system can be increased by approximately 2% in several regions of China. This paper shows the pre-cooling air compressor system is feasible for energy saving.
节能是实现净零碳排放的主要技术途径之一。空气压缩机系统在工业领域的能源消耗中占很大一部分。提出了一种预冷空气压缩机系统，通过在空气流入压缩机之前对其进行冷却来实现节能。分析了所提出系统的能源效率。由于空气冷却需要额外的能源消耗，因此分析了预冷节能方法的可行性。由于预冷空气压缩机系统的效率主要受环境温度和湿度的影响，讨论了该系统在不同地区和不同季节的适用性。进行了一个试点项目，以验证所提出系统的技术可行性和经济性。当试点系统的预冷温度设定为2℃时，在中国的几个地区，该系统的年度气电比可提高约2%。本文表明预冷空气压缩机系统节能是可行的。
