Throughout the printing industry, printers use diverse technologies to produce printed materials such as magazines and product labels. From lithography and flexography to screen printing, the many different printing processes share some common production and environmental challenges. Among these are the wise use of energy, maintenance of good indoor air quality and year-round control of temperature and humidity in the facility.
Two Midwestern printing plants, each dealing with different issues related to the expense of waste heat, found using air-to-air heat exchangers in a heat recovery system helped reduce the amount of waste heat and the price of their electric bills.
A Wisconsin printer using flexographic printing equipment was experiencing air balance problems in the printing plant. Problems included drafts and high energy bills associated with negative air situations. Rather than simply addressing the air deficit with a traditional gas-fired makeup unit, an approach was formulated to capture much of the energy in the airstream with air-to-air heat exchangers.