8-236_AZ_89x261_GB 01.04.2008 10:31 Uhr Seite 1
Operation & Maintenance of Power Plants C M Y CM MY CY CMY K
Calcium Silicate also creates considerably greater levels of dust than low biopersistent fibre-based board when chopped, shaped or handled, which potentially exposes operatives to the inhalation of a particulate. Dealing with this requires the use of appropriate respiratory protective equipment (RPE), which adds to the cost.
Fig. 2. Morgan Thermal Ceramics’ Superwool Plus Blok fibre modules can reduced CO2 year compared with the leading Calcium Silicate board.
A further key issue with these products is that of water absorption, as one installation option is to apply a castable material directly onto the back-up lining material. While low biopersistent fibre based board products are treated to be water repellent (hydrophobic), Calcium Silicate boards are highly water absorbent. Tis can result in the castable becoming dry and not curing correctly. It can also result in water becoming trapped in the back-up lining, leading to possible material damage.
Fibre-based boards One of the quickest and most cost-effective ways of achieving savings is by fitting low biopersistent fibre- based boards in furnaces. Although Calcium Silicate is one option, low biopersistent fibre-based boards almost always offer the most energy efficient solution. In recent testing, Morgan Termal Ceramics compared its Superwool Plus Blok product against a leading brand of Calcium Silicate board, covering a surface of 380m2
emissions by 190 tons a
with 80mm
back-up insulation. Results showed that although Calcium Silicate typically has a lower initial purchase price, the difference in cost will be repaid over the course of just seven weeks, due to the superior energy efficiency of Superwool Plus Blok fibre modules. When the energy-saving difference between the two materials is considered over a 12-month period, the difference in cost is paid back more than seven times. ●
Dave Barrington is general manager, Morgan Thermal Ceramics UK, Wirral, Merseyside, UK.
www.morganthermalceramics.com
For more information ✔ at
www.engineerlive.com/ipe Probedruck
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