In remembrance of Dr.-Ing. Karsten Junge

In remembrance of Dr.-Ing. Karsten Junge
Comparison of designs and economic efficiencies of air circulation systems in dryers (Part 2)

»1 Drying times of various drying methods

»17 Cross section of an air wall dryer with dryer cars and railbound air walls

»23 Air wall dryer for roof tiles, with platform car and stackable drying supports

»24 Air wall dryer for plain tiles, with oblong inlets

»25 Impact airflow onto roof tiles in an XStream rapid dryer (red = hot air, blue = moist air)

»26 Stackable drying supports (modular channel) for standard roof tiles, with QuickPoint support and perforated plates arranged above and below the tile

»27 Cutaway view of a drying support for accessory tiles, with different sections in the air duct

»28 Drying support grouped upstream of an XStream rapid dryer

»29 Cross-sectional view of an XStream rapid dryer for roof tiles, with stackable drying supports and platform cars

»30 Comparison of specific power consumption (circulation fans only) and circulation factors for air wall-type and rotary fan dryers (8 roof tile factories)

Following a rundown of determining parameters for the drying process, Part 1 (Zi 5/2011, pages 12–26) of this report compared and analysed measured economic operating data of various air circulation systems for masonry brick and clinker dryers. Now, Part 2 presents corresponding data for roof tiles. In nearly all regards, rapid dryers emerge as the most economical variant, often by a wide margin.

6 Conventional air circulation systems for roof tiles

Rotary fans or air walls are also employed in roof-tile dryers of conventional design. Unlike air wall dryers for masonry bricks and clinkers, however, air wall dryers for roof tiles have horizontal slit inlets (»23). For the sake of simplicity and easy assembly, round inlets (»24) can also be used.

7 Air circulation systems in rapid dryers for roof tiles

Due to the drawbacks of parallel incidence, as mentioned in item 2.6 (Part 1 in Zi5/2011), other forms of incidence were investigated for roof tiles in various experiments and simulations...

Issue 5/2011

Comparison of designs and economic efficiencies of air circulation systems in dryers (Part 1)

In remembrance of Dr.-Ing. Karsten Junge

1 Introduction All kinds of bricks and tiles (clay masonry units) are still being dried by means of air circulation in convection dryers. Thus, the air circulation system constitutes the dryers core...

Issue 05/2014