摘要
通过对太阳能热泵沼气工程供能系统进行分析,找到能量利用薄弱环节;利用Matlab软件对系统状态参数进行变量非线性最优化问题求解,得出提升系统效率的具体措施与方法,并进行了验证性实验,同时研究了个别状态参数和设备性能参数对系统效率的影响。结果表明:优化后可将系统效率从18.44%提升至28.99%。状态参数(蓄热水箱温度t v)以及性能参数(热泵系统CCOP(year)和集热器效率ηcol)对系统的效率影响很大,其中蓄热水箱水温提高1℃,系统效率将提高0.58%;CCOP(year)值每提高一个单位值,系统效率将提高5.94%;集热器效率ηcol值提高一个百分点,效率将提高0.045%。
In recent years, solar assisted heat pump based heating system has been widely applied in the buildings and greenhouses, but it is little applied and researched in biogas projects. Exergy analysis of solar assisted heat pump based heating system of biogas project was conducted, and the weak links were found in the energy-using process; system status parameters were obtained by solving variable nonlinear optimization problem with Matlab; specific measures and methods of improving system exergy efficiency were proposed and validation experiments were done ; the effect of individual status parameters and equipment performance parameters on system exergy efficiency was also studied. The results showed that optimized system exergy efficiency can increase from 18.44% to 28.99%. The status parameter（storage tank temperature tv） and performance parameters（pump system CcoP（year） and collector efficiency r/oo~） have a great influence on system exergy efficiency. The system exergy efficiency can increase by 0.58% with the temperature increasing by 1 ~C , increase by 5.94% with the CcoP（r^r） increasing by one unit of value, increase by 0. 045% with the collector efficiency r/~ol increasing by one percentage point.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2014年第1期143-149,167,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家高技术研究发展计划(863计划)资助项目(2013AA103006-02)
关键词
太阳能
热泵
沼气工程
煸分析
优化
Solar energy Heat pump Biogas project Exergy analysis Optimization
