基于节能系数概念，评价预测了节能与环保效益。
The benefits of energy-saving and environment protection were evaluated and forecasted based on the concept of energy-saving coefficient.
其材料的使用在建筑节能的基础之上，更多考虑建筑的生态效益，并最终实现功能与美感的统一。
Its material using tends to attach more importance to the ecological benefits based on energy-saving so as to realize the combination of functions and beauty.
较单级系统而言，双级空调系统具有良好的整体性能与节能效益，在使用低温热源上有较大优势。
Compared with the one-stage system, the two-stage system has the better performance in whole. Energy savings and the capability to use low temperature heat are obtained.
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