摘要
制约碳捕集技术实用化的重要瓶颈在于捕集能耗过高,而热力学是能源系统效能分析的有力工具。基于将热力学研究方法应用到碳捕集技术效能分析的思想,本文以变温吸附碳捕集为例,按照"物性-过程-冷热源-循环"顺序,完成热力学碳泵循环(TCPC)的构建,进而考察循环参数对总能耗和第二定律效率的影响。结果显示;循环能耗主要受循环温度、吸附剂和吸附相等影响,吸附相显热大约占循环总能耗的2%;第二定律效率区间为13.91%~21.21%,具有较高节能潜力;TCPC作为一种基于热力学思想的"量化规尺",可对碳捕集技术展开效能分析,进而对影响循环总能耗的主要因素进行归纳,并可通过第二定律效率对技术成熟度进行判断,有效挖掘碳捕集技术的节能潜力。
The main bottleneck of carbon capture technologies is the energy-intensive consumption,while thermodynamics can be considered as an effective tool for energy system analysis.By the ideology of application of thermodynamics into analysis on carbon capture system,the construction of thermodynamic carbon pump cycle（TCPC） is completed based on the research sequence of ＂property-process-source-cycle＂.The effect of cyclic parameters on the energy efficiency performance of temperature swing adsorption（TSA） is evaluated in terms of the total heat consumption and second-law efficiency.The results show that the heat consumption of TSA depends on the cycle temperature,physical property of adsorbent and adsorbed phase.However,the sensible heat of adsorbed phase accounts for about 2%of the total heat consumption.The range of the second-law efficiency for TCPCs is from 13.91%to 21.21%,and it means that TCPCs have high energy saving potentials.As a quantitative rule of thermodynamics,TCPC can address the energy-efficiency analysis on CO_2 capture technologies.Furthermore,according to the judgment of technical maturity based on the second-law efficiencies,the cyclic factors on energy consumption can be summarized and the energy-saving potentialities of CO_2 capture technologies can also be exploited.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2017年第7期1531-1538,共8页
Journal of Engineering Thermophysics
基金
国家自然科学基金青年科学基金(No.51506149)
天津市应用基础与前沿技术研究计划青年基金项目(No.15JCQNJC06700)
关键词
热力学碳泵
碳捕集
碳泵循环
变温吸附
第二定律效率
thermodynamic carbon pump
carbon capture
carbon pump cycle
temperature swing adsorption
second-law efficiency
