Pretoria climate data with IWAC supply temperatures

Here is the Pretoria climate data posted before, but with the IWAC supply temperatures super imposed.

The lines indicate the number of days per year that the IWAC will provide supply air above the specific temperature datum.

Pretoria climate data

Included is a 2D histogram for Tdb/Twb for the Pretoria Forum, 14h00, 1956-1960 for the months Dec-Feb.

Here is the actual bin data for the graph above.

Unit images

A Compact Single Stage with centrifugal fan

A Two Stage cooler connected to vertical ducting

The Two Stage unit seen from the side. Note the dry cooling coil (loads of small copper pipes protruding from the side)

A number of small Single Stage units ready for loading

Two Stage double units where the secondary air is blow out vertically and the primary air horizontally

A Two Stage evaporative cooler mounted on a roof