Bản vẽ thiết kế năng lượng mặt trời thụ động

An architectural cross-section blueprint diagram explaining the concept of passive solar design in a [residential house]. Crisp white line drawing on a classic deep blue blueprint background, showing the contrasting angles of the sun in winter and summer. Clear technical schematics illustrate solar rays, roof overhangs, and window placement affecting seasonal heating and cooling. Accurate architectural drafting style with structural notes, dimension lines, and physics-based thermal airflow indicators.