摘要
为了充分利用冷热电多能联供(CCHP)子系统的余热,提高能源的利用效率,并与我国的能源现状相适应,将级联地源热泵与焦炉煤气基CCHP进行深度耦合,提出了一种新型的多能联供系统.基于AspenPlus平台,对该系统进行了模拟运行、热力学分析和关键参数的灵敏度分析.结果表明:系统的一次能源利用效率和效率分别达到95.12%和35.12%,高于常规系统的83.80%和31.80%.压缩机、循环泵的㶲效率较高,换热器的效率相对较低.㶲损失主要发生在燃烧室和烟水换热器,分别占整个系统总烟损失的48.7%和29.9%.当其他参数值一定时,采暖循环水中间温度和上级循环压缩机出口压力与级联热泵循环子系统的功耗呈正相关,蒸发器压力与级联热泵循环子系统的功耗近似呈负相关.
A novel multi-energy combined supply system was proposed by deep coupling a cascade ground source heat pump(C-GSHP)system and a coke oven gas-based combined cooling,heating and power(COG-CCHP),so as to maximize the utilization of waste heat from the CCHP subsystem,enhance energy utilization efficiency,and adjust to China’s current energy landscape.Based on the Aspen Plus platform,the simulation operation,thermodynamic analysis,and sensitivity analysis of the system’s important parameters were completed.The results indicate that the system’s primary energy utilization efficiency and exergy efficiency are 95.12%and 35.12%,respectively,greater than the traditional system’s 83.80%and 31.80%.The exergy efficiency of compressors and circulating pumps is relatively high,while that of heat exchangers is relatively low.The exergy loss mainly occurs in the combustion chamber and the steam-water heat exchanger,accounting for 48.7%and 29.9%of the total exergy loss of the entire system,respectively.When other parameter values are fixed,the intermediate temperature of the heating circulating water and the outlet pressure of the upper-level circulating compressor are positively correlated with the power consumption of the cascade heat pump circulation subsystem,while the evaporator pressure is approximately negatively correlated with the power consumption of the cascade heat pump circulation subsystem.
作者
冯明杰
王登亮
夏毓谦
刘晟晖
FENG Ming-jie;WANG Deng-liang;XIA Yu-qian;LIU Sheng-hui(School of Metallurgy,Northeastern University,Shenyang 110819,China.)
出处
《东北大学学报(自然科学版)》
北大核心
2025年第10期81-88,共8页
Journal of Northeastern University(Natural Science)
基金
国家重点研发计划项目(2021YFB3701302).
关键词
级联地源热泵
焦炉煤气基CCHP
运行性能
地热
cascade ground source heat pump
coke oven gas based CCHP
operational performance
geothermal energy
