太阳能辅助沼气化学回热的新型冷热电联产系统模拟分析  

Simulation Analysis of a New CCHP System Based on Solar-assisted Biogas Chemical Recuperation

作　　者：王异林 苏博生 黄枝 黄宇鹏 黄祺腾 袁妁 WANG Yilin;SU Bosheng;HUANG Zhi;HUANG Yupeng;HUANG Qiteng;YUAN Shuo(College of Marine Equipment and MechanicalEngineering,Jimei University,Xiamen 361021,Fujian Province,China)

机构地区：[1]集美大学海洋装备与机械工程学院,福建厦门361021

出　　处：《动力工程学报》2024年第2期213-220,231,共9页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(52006089);福建省自然科学基金资助项目(2020J05142)

摘　　要：提出了一种太阳能辅助沼气化学回热的新型冷热电联产系统,在新系统中考虑了沼气池的热负荷,并通过中温槽式太阳能生产大量水蒸气来构建一种高水碳比的沼气蒸汽重整工艺。基于Aspen Plus仿真软件,分析了水碳比对新系统和参比系统性能的影响。结果表明:在设计点工况下,新系统的发电效率较参比系统提高13.4%;在2个系统供冷量相同的情况下,新系统供热量较参比系统高1476.69 kW,增幅为110.62%;由于太阳能的引入带来了产电收益,集热温度为170℃时,新系统的太阳能净发电效率最低值(17%)仍高于集热温度为300~400℃时传统槽式太阳能热发电系统的最大发电效率(16%)。A new combined cooling,heating and power system based on solar-assisted biogas chemical recuperation was proposed.In the new system,the heat load of the biogas digester was considered,and a biogas steam reforming process with high water-carbon ratio was constructed with much water vapor generated by the trough solar energy in medium temperature.Based on the simulation software Aspen Plus,the effects of the key parameter water-carbon ratio on performance of the new and reference systems were analyzed.Results show that the power generation efficiency of the new system is 13.4%higher than that of the reference system in the design condition.With the same cooling capacity,the heating capacity of the new system is 1476.69 kW higher than that of the reference system,with the increase of 110.62%.Due to the introduction of solar energy,it brings electricity generation benefits,the lowest solar power efficiency(17%)of the new system at a collector temperature of 170℃is higher than the maximum power generation efficiency(16%)of the traditional parabolic system at 300-400℃.

关 键 词：化学回热 沼气蒸汽重整 沼气-太阳能互补 低温潜热回收 分布式供能系统 

分 类 号：O414.1[理学—理论物理]