对不同耦合连接方式下的生物质-太阳能双热源联用建筑采暖系统进行了数值研究，讨论了双热源直接耦合、间接耦合、热源串联连接、并联连接等各种供热方案的系统运行特性。研究表明，直接耦合的太阳能集热效果高于间接耦合，供暖期内前者的太阳能利用率高于后者2.7%；双热源分支流量比λ是影响并联耦合运行时系统热供效率的重要因素，当λ等于双热源的负荷比时，系统达到最佳供热效率。

A biomasssolar hybrid system for office building heating located in North China was constructed and tested numerically,and the heating behavior of different heating schemes,including direct and indirect coupling,parallel and serial connections of the dual thermal sources were analyzed.Results showed that the solar collection efficiency of direct coupling is higher than that of indirect coupling by 2.7% for one heating season,and based on the study of heating efficiency of dual thermal source,the flow branch ratio,λ,was found to be one key factor influencing the heating efficiency.The highest efficiency was achieved with the flow branch ratio equal to the load ratio.

TK6;S214;S216

天津市科技支撑计划项目（14ZCDZGX00821）；河北省应用基础研究计划重点项目（13964308D）