立足于产品的绿色设计，构建了产品再回收设计的经济性分析模型，以保证产品在回收处理阶段的成本与收益之间的均衡。
Based on product green design, this paper proposes the product recycling design economic analysis model to assure the equilibrium of costs and benefits at the recycling stage.
以汽轮机功率方程和锅炉吸热量方程为基础，并将机组的整个回热系统视为一闭口热力系统，通过对其的热平衡分析，得到了高加切除对机组热经济性影响的计算模型。
By heat balance analysis of the whole regenerative system, which is regarded as a closed thermodynamic system, the calculation model on the influence of HPs removal on heat economy of unit is derived.
在以上研究的基础上，并结合结构体系的特点，提出了基于价值工程理论的结构体系经济性分析的方法和模型。
On the base of above study, and with the structural system feature, we put forward economic of structural system analyzing method and model, which is base on value engineering theory.
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