Assigning optimum time period for using evaporation cooling systems in Iraq

Increasing demand on electricity power during summer in Iraq because of increasing averages of temperature reached 47 ºC and continuous to increase and the problems facing Iraq is the increasing in peak load for the electrical system because of using cooling and air-conditioning operated by compressed gases, according it is obliged to search  for alternative methods to activate   electrical power consumption and one of solutions and processing is  using application of cooling  by evaporation (evaporation coolers) consumed less electrical and  power compared with other cooling devices  which provide power of amount (80%) and for what Iraq characterized by climate conditions such as  scarcity of relative humidity among the research results, the general average of monthly average of relative humidity in Iraq during the summer season (the study period) for 36 years for the period (1980-2015) not exceeded (42%) as for  the general average of the monthly average of temperature for the same period was higher average for it (31 ºC) and for these two elements are the core to identify the cooling  efficiency, according Iraq is considered one of the  good area to use the evaporation cooling applications, where the general average  of monthly average of cooling efficiency for the same period was higher average(51%) and the optimum time period  for using the evaporation  cooling applications in Iraq  in July at  Salahdd in  city center with monthly efficiency average (60%).