What is Green Trades Math?


Ripped from the Headlines, Part Deux!

https://www.nytimes.com/interactive/2021/06/29/upshot/portland-seattle-vancouver-weather.html?action=click&module=RelatedLinks&pgtype=Article

CO2 levels the highest ever measured. The last time there was this much CO2 in the air, Titanis terror birds roamed the Earth.

An extra tidbit: a study surveying half a million workers found that physically demanding jobs will help you live longer.

Warmup Question: Why are Bioswales an example of green building? (responses)

LEED link

Apply table and graph reading skills to solve three green trades math problems:

What follows are the procedures for calculating how green a building is.


Green Math Calculations

Let’s start with

Heat Transfer through a Wall. You’ll need to find three numbers:

  1. The Thermal Conductivity number, given building material.
  2. The Area the heat gradient is going through. We will use one of three rooms.
  3. The “delta T” — the change in temperature. Each problem will give you two temperatures. Do the takeaway.

And now Solar Panels. You’ll need to find, … another three numbers:

  1. The Insolation number, given city and month.
  2. The number of daylight hours.
  3. The area of the solar panel in square meters.

And finally, Heat Pumps. Another three numbers:

  1. Mass Flow Rate. Given in the problem.
  2. Heat Capacity of the coolant.
  3. Another delta T.

That’s it for Green Trades Math.


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