For that reason, we have started interfacing with Wunderground to obtain historical temperature data for specific locations. We then simulate the performance of an evaporative cooler so that the client can get an idea of the performance of the cooler.
Here is an example of two locations: The first is Monte Vista on the Cape flats. A pretty humid location where this client had a specific need to condition a large storage location.
The second was Oliver Tambo Airport in Johannesburg, elevation nearly 1400 m and much dryer.
|Figure 1: Predicted summer temperatures for Monte Vista|
Figure 2: Predicted summer temperatures for Oliver Tambo Airport
This performance of the units are quantified in Figure 3 and 4.
|Figure 3: Monte Vista hours over specification|
|Figure 4: ORT hours over specification|
It is clear that at ORT, that the evaporative cooler will produce air that is 1 ° C over specification for slightly more than 2 % of the summer hours. Air at 2 ° C over-specification will be less than 1 % of the total summer hours.