【摘要】 针对经典冷热电联产系统变工况性能差及其动力设备排烟余热利用不充分的问题，提出了一种耦合压缩空气储能和蓄热装置的电-冷–热-压缩空气多联供系统。建立多联供系统模型，开展压缩/膨胀等熵效率、储气室最高/最低压力、产气压力以及烟气分流率等关键参数对系统性能影响的敏感性分析，发现产气压力存在最佳值，并且增大烟气分流率能够提高系统全工况性能。与参比系统对比分析的结果表明，所提系统热力学性能优异，综合能源利用率增加3.78个百分点，相对节能率增加6.11个百分点，?效率增加4.33个百分点。进一步采用T-Q图对烟气余热利用过程进行分析，阐明所提系统性能提升的关键。更多还原

【Abstract】 In order to solve the problems of poor performance of prime power equipment running at off-design condition and insufficient utilization of the exhaust waste heat of the power equipment in traditional combined cooling heating and power(CCHP) system, a powercooling-heating-compressed air multi-generation system coupled with compressed air energy storage(CAES) and thermal energy storage was proposed. The system model was established, and the sensitivity analysis of key parameters that affect the performance of system was carried on,such as isentropic efficiency of compression/expansion, maximum/minimum pressure of compressed air reservoir, compressed air production pressure and flue gas flow rate. Sensitivity analysis revealed the existence of an optimal compressed air production pressure and demonstrated that increasing the flue gas flow rate enhances system performance across all operating conditions. The results showed that proposed system represents excellent thermodynamic performance, of which the primary energy ratio, the primary energy saving rate(PESR) and the exergy efficiency is3.78, 6.11 and 4.33 percentage point higher, respectively. Furthermore, the T-Q diagram analysis of exhaust gas cascade utilization elucidated the fundamental mechanisms behind performance improvement.更多还原