Research on Energy-Saving Design Method of Green Building Based on BIM Technology

Table 2

Evaluation system of green building energy efficiency design effect and index relationship at all levels.

Item	Primary index	Secondary index
1	Energy-saving design	Feasibility of design scheme
		Quality of external protection structure
		Energy consumption
2	Energy consumption	Lighting condition
		Energy utilization
		External environmental conditions
3	Daylighting condition	Indoor lighting condition
		Light transmittance of external window
4	Ventilation condition	Indoor ventilation
		Indoor air quality
		Outdoor ventilation