Finally, the process of heat transfer is calculated in the furnace, smoke tube and condensation heat transfer tube, and the design of construction is checked out. In the experiment, the thermal efficiency of this boiler is up to 93%. 最后对炉膛、烟管、以及凝结换热管的传热进行了理论计算,对其结构设计进行了校核,并对真空热水锅炉热效率进行了实际测定,其热效率达到93%。