The water flow rate was in the range of 8.265 26.117 l/min and the average inlet air mass flow rate was 1.1041 kg/h, with inclination angles of 15°, 30°, 45°, 60°, 75°, 80° and 85°.
We created box plots for daily maximum 1-hour ozone, daily maximum temperature, daily average dew point temperature, and daily average sea-level pressure for each air mass for each of the five cities.
The findings show that the average heat and mass transfer coefficients increase with increasing air mass flow rate and air relative humidity, and decrease with increasing the temperature difference between the air dew point and pipe surface temperature.
The trend of air mass variation is also supported by the average monthly data of Clearness Index (CI or Kt) for the year 2010, which was measured and is being plotted in Fig. 7.
The facility was assessed under the average daily solar irradiance of 412.6 Wm−2 and ambient temperature of 30 °C over an air mass flow rate range from 0.010 kgs−1 to 0.032 kgs−1.
Many of the Earth's deserts lie near the average latitude of the subtropical ridge, where descent reduces the relative humidity of the air mass.
The DT air mass, as expected, is characterized by smaller values for the daily average dew point temperature than the MT air mass, whereas the MT air mass shows higher values of daily average dew point temperature.
The fan power consumption has been estimated with following formula: P_{abs,fan} cong frac{{dot{m}_{air} cdot p_{air} }}{{rho_{air,avg} cdot eta_{fan} }} (15 considering the required cooling air mass flow (dot{m}_{air}), the total radiator core air side pressure drop, (Delta p_{air}), the average air density, ρ air,avg, and the fan efficiency, η fan.
