| Specialist printer of laminates
using gravure and flexo web printing processes the factory produced packaging for the
bakery, cereals, confectionery, dairy, ice cream and snacks markets. The factory had an existing ventilation system but this was unable
to maintain a comfortable working temperature. Following a trial of a single unit a
complete factory proposal was designed using AutoCAD.
The details of the proposed cooler positions were then
clearly and easily communicated to all interested parties. Fourteen internal evaporative
coolers were installed at various locations throughout the factory.Each is individually
controlled to give spot cooling to work stations both by the main printing presses and
finishing areas. The coolers are suspended from the roof structure using simple
Unistrut components.All services run from above.
The mains water is supplied via
brominators to provide a low level of biocide in the circulating water. The other
use of internal evaporative coolers in the print industry is for humidification. During
the summer months the Relative Humidity routinely drops below 30% in factories. In winter,
when the air is being heated, the humidity can drop below 20%. An internal evaporative
cooler can be used to control the minimum level of humidity in a print factory by
connection to a hygrostat which will then control the fan speed and water circulation to
achieve a minimum set point. |
