Solar urban design using Energy3D: Part IMay 17th, 2013 by Charles Xie
The solar urban design project we have developed challenges students to use Energy3D to construct a square city block surrounded by a number of existing buildings of different heights, with the goals to maximize solar access for new constructions and minimize obstruction of sunlight to existing buildings. The existing buildings, which cannot be modified by students, serve as constraints for the design challenge. This design challenge is an authentic engineering problem as it requires students to consider solar radiation as it varies over seasons and apply these math and science concepts to solve open-ended problems using a supporting analytic tool. This distinguishes it from common computer drafting activities in which students draw structures whose functions cannot or will not be verified or tested.
The horizontal radiation heat map can be used to identify the hot and cold areas of the empty city block. With this heat map, students can find out where the new constructions should be in order to have maximal solar heating in the winter. Once they put in a new building, they can move the building around within the construction site to experiment how much solar energy the building will gain. As an example, Figure 3 shows that a rectangular high-rise building will receive the highest amount of solar radiation in January if it is placed at the southwestern part of the square and it will receive the lowest amount of solar radiation if it is placed at the southeastern part.
Such an analytic tool provides data for students to make their design decisions, creating plenty of opportunities of inquiry in design processes.