Northwest School is expanding their campus with a new building that includes a Gymnasium, Auditorium, and Cafeteria. Rushing is the Mechanical Engineer of record.
This photo was taken at Mithun’s office after a very early brainstorm session and is an example of integrated design in the early incubation phase.
The building sectional sketch created by Richard Franko, Partner at Mithun, shows potential mechanical approaches woven into the architectural spaces along with associated topics such as energy, codes, filtration, and insulation.
The following images come from a recent meeting addressing solar heating options for the Northwest School Expansion.
These graphics show the differences in efficiency of flat plate versus evacuated tube configurations for solar heating.
From Nathan Miller:
“There was … much discussion about the results of the flat plate vs evacuated tube in our presentation yesterday, and we mentioned that flat plate is more efficient when you aren’t trying to drive the temperature up as high. Here is a chart to better illustrate that point. This comes from ASHRAE and compares “generic” flat plate and evacuated tube solar collectors, but we also create a custom version for the specific panels in our study and the results are very similar – see below
The left axis is % of incident solar radiation that is converted into thermal energy. The bottom axis is less obvious, and has to do with the temperature difference between ambient and the fluid you are trying to heat, divided by the amount of solar radiation. The units aren’t really important, but I marked up the approximate axis values for DHW preheat, which is a relatively low-temperature difference application and space heating, which is a high-temperature difference application.”
The layouts of both the flat panel array and evacuated tube array can be found here: Northwest School Solar Exhibit Sheets