Pressure dependency of effective thermal conductivity of packed beds

✍ Scribed by N. Wakao; D. Vortmeyer

• Publisher: Elsevier Science
• Year: 1971
• Tongue: English
• Weight: 528 KB
• Volume: 26
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(71)86063-3

✦ Synopsis

The effective thermal conductivities of packed beds with stagnant gas were theoretically computed, and it was found that these are expressed as ke = (ke)com) + (ke)RAD "q-(ke)cONTACT gas-solid radiation contact conductivity conductivity conductivity

Each conductivity was illustrated in graph; (/Q)COND is highly pressure dependent, (ke)aAD is slightly pressure dependent and (k e)CONTACT is independent of pressure.

It is also shown that for fine particles the effective thermal conductivities even at normal pressure is still in the pressure dependent region and is influenced by the gas accommodation coefficient.