top corners fell below 0.25 liters/min-ft2, but the center test areas did not. This is largely Figure 11: The spray rack disassembled and bundled with Velcro straps. due to the fact that there is minimal spray nozzle overlap at the outermost sample The spray rack and stand were tested and areas. easily fit into a compact sedan (Nissan 200SX) At an 18 inch rack-surface separation, the by one person. Rubber caps were also spray rack effectively covered 61% more attached to the ends of each member, shown surface area, but the required internal in Figure 12, so that forces of impact from pressure of the system rose to 30 psi. When transportation and industrial handling will be the pressure of this system fell below 30 psi, more effectively absorbed. it behaved almost identically to that of the 12 inch rack-wall separation system. Maintenance Although the spray rack has not required any maintenance after the fabrication was Portability The portability of the new spray rack system completed, the team does not foresee many has fully satisfied the requirements of the instances where potential problems could not PDS. The rack can be assembled/ be easily maintained and serviced in the field disassembled on site by one person in or at the Morrison Hershfield facility. approximately 5 minutes, which minimizes Copper was chosen as the piping material the additional time needed to improve with soldered joints. If a section of piping, portability. or pressure gage were to be irreparably Disassembled and bundled with Velcro straps damaged, the affected area can be cut out if shown in Figure 11, the rack’s dimensions are needed, and replaced with parts commonly 6 ft. long, with its largest diameter equal to found at most hardware stores. If leaks occur, about 9 inches. The spray rack stand, used the joints can be heated and re-soldered. for mounting at ground level applications, is a Brass nozzles and bushings, shown in Figure 6.5 ft long, which intersects perpendicularly 12, were chosen with simple designs to at one end with a 3 ft section of tube. minimize corrosion, to be easily cleaned of clogs, and easily replaced. These parts were
top corners fell below 0.25 liters/min-ft2, but the center test areas did not. This is largely due to the fact that there is minimal spray nozzle overlap at the outermost sample areas. At an 18 inch rack-surface separation, the spray rack effectively covered 61% more surface area, but the required internal pressure of the system rose to 30 psi. When the pressure of this system fell below 30 psi, it behaved almost identically to that of the 12 inch rack-wall separation system. Portability The portability of the new spray rack system has fully satisfied the requirements of the PDS. The rack can be assembled/ disassembled on site by one person in approximately 5 minutes, which minimizes the additional time needed to improve portability. Disassembled and bundled with Velcro straps shown in Figure 11, the rack’s dimensions are 6 ft. long, with its largest diameter equal to about 9 inches. The spray rack stand, used for mounting at ground level applications, is a 6.5 ft long, which intersects perpendicularly at one end with a 3 ft section of tube. Figure 11: The spray rack disassembled and bundled with Velcro straps. The spray rack and stand were tested and easily fit into a compact sedan (Nissan 200SX) by one person. Rubber caps were also attached to the ends of each member, shown in Figure 12, so that forces of impact from transportation and industrial handling will be more effectively absorbed. Maintenance Although the spray rack has not required any maintenance after the fabrication was completed, the team does not foresee many instances where potential problems could not be easily maintained and serviced in the field or at the Morrison Hershfield facility. Copper was chosen as the piping material with soldered joints. If a section of piping, or pressure gage were to be irreparably damaged, the affected area can be cut out if needed, and replaced with parts commonly found at most hardware stores. If leaks occur, the joints can be heated and re-soldered. Brass nozzles and bushings, shown in Figure 12, were chosen with simple designs to minimize corrosion, to be easily cleaned of clogs, and easily replaced. These parts were
Rain%20Rack%20-%20Final%20Report.docx