The exterior walls of my design are a mix of south-facing curtain walls with triple glazing for an R value of 3.7, a visual light transmittance of 0.7, and a solar heat gain coefficient of 0.61, and CMU insulated walls with an R value of 21.69 and a thermal mass of 38.47.
My windows are double-glazed low-E coating with an R value of 2.22, a visual light transmittance of 0.76, and a solar heat gain coefficient of 0.65.
My design has three separate roof sections - the first one is modeled as a floor to allow for cafe terrace seating, the second roof section includes a green roof with tiled paving, and the top roof section is modeled as a standard roof (steel truss EPDM) to allow for PV panels.
The bottom floor consists of 10” of cast-in-place concrete with a 3” thermal/air layer for an R value of 18.68 and a thermal mass of 18.78. All other floors consist of 3” of LW concrete on a 2” metal deck, with R values of 3.45 and 3.88 thermal mass.
I chose not to include shading elements because the sunlighting during summer months was minimal, and I wanted to retain maximal daylighting and solar heat gain during winter months, as well as reduce any potential obstruction of the views.
The windows on the back end of the building are dictated by the layout of the rooms, and no windows are included on the back side of levels one and two because of the layout of utility/storage spaces and restrooms, and the use of curtain walls for the programmed spaces. My main entrance is on the east side of the building, with both a revolving door and an ADA-accessible sliding door. Two triple glazed double glass doors provide access to the terrace on level two, and two triple glazed curtain wall glass doors provide access to the green roof on level three.