Effect of soot on rating of heating boilers

• Publisher: Elsevier Science
• Year: 1940
• Tongue: English
• Weight: 131 KB
• Volume: 230
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(40)90378-7

✦ Synopsis

Heating for 6 hours at 221' F. and each of the three humidities weakened all of the yarns. The breaking strength and elongation at break of the viscose, cuprammonium, degummed silk, and cotton yarns decreased still more at higher temperatures.

In comparison with heating at I per cent. absolute humidity, heating at 9.5 per cent. absolute humidity resulted in lower breaking strengths and elongations at break for all yarns except the raw cotton, higher fluidities, lower affinity of cellulosic fibers, and higher affinity of wool fibers for the dyes.

Heating for 3 hour at 302~ F. had little effect on the properties of the yarns, except the viscose and cuprammonium rayon, which were adversely affected.

The damage which occurred at a given temperature and humidity increased throughout the heating period.