As the evaporative cooler is used within the space the improvement of the two factors mentioned above are 49.5 and 19% respectively. Using 4 rows evaporator improved the water generation and power consumption by 26% and 10% respectively. when the volume flow rate of air is 230 m 3 /hr, this amount of water production is increases to about 13.11 lit/day with a power consumption of 1.068 kW-hr/lit, when an evaporative cooler is turned on in the test room. The result showed that the maximum water production for the two rows evaporator is 7.9 lit/day with a power consumption of 1.76 kW-h/lit. As well as the effect of using evaporative cooling at the test room on the water production is studied. Many parameters are studied in this work, namely the volume flow rate of air across the evaporator in the range from 224 to 540 m 3 /hr, the number of evaporator rows, and configuration of evaporator rows connection. The compressor used in the unit of 372 W capacity. The unit consists of a vapor compression unit. Orthogonal worm gear pairs are classified in the form of the original body of the worm – cylindrical worm, globoid worm, flat worm gear pairs – with flat worm, with shifted axes hypoid gear pairs spiroid gear pairs – properly spiroid one and cylindrical spiroid gear pair – helicon.Ī water harvesting unit is designed and built and test under Iraqi weather.

Hyperboloid gears are differentiated by the number of meshing zones and location of them relatively to the line of centers, as well as in according to the shape of initial surfaces of the conjugate links and type of meshing.

Involute gears are classified by the virtual number of teeth, different for spur, helical, crossed helical, straight bevel, etc. Gear pairs with the flat gear wheels are distinguished in the shape-generated surfaces. These specific characteristics overtake the variations in the type of initial surface and the angle of inclination of the tooth at the designed point in the form of initial body on which tooth surface should be formed by the relative position of initial bodies according to the tooth shape and the types of tooth profile (involute, cycloid, epy- or hypocycloid, complete of circle arcs and straight lines), accordingly with relative positions of the axes.

A variety of classification systems and criteria are under consideration, which relate to the type of gears and gear pairs, meshing systems, axes position, etc. A review of sources regarding classification of the gear trains with toothed wheels on fixed axes is given.

System mechanic pro crack 18.0.2