. . .and pulling it apart has a chilling affect on air and apartments.
The new evaporative cooler – purchased and installed for less than 400 USD has been tested with good results. At 38 C outside the chiller kept the apartment in the mid 70s Fahrenheit.
The Psychrometric Chart below combines enthalpy calculations in a combination intended to allow prediction of the expected cooling. The chart shows that with outside air at 120 F (50 C) and 20 % relative humidity, we may expect to have between 75 F and 80 F inside the apartment – more or less.
The charts of average temperature and humidity for Luxor suggest the system might keep the apartment cool right through the heat of the summer – for about 100 watts of energy and a few gallons of water per day. So far, we have only tested it o 38 C. We shall see – Preferably our new renters will discover how well it works!
Egypt’s electrical energy use has been steadily increasing as a result of growing population, disposable income, and air conditioning. But it won’t be hard to reduce energy use here. The flat landscape and compact urban environments are perfect for electrical vehicle usage. Photo-voltaics could generate sufficient power for distributed battery charging. Most buildings south of Cairo could use evaporative cooling. The simple solutions applied at our apartment here in Luxor could reduce upper middle income household energy use to a fraction of present use.
I have some local engineer friends who have just had their government project concelled by the ministry due to a shortage of funds. I am meeting them next week – maybe I can suggest they start their own “Green Company”.
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