Abstract
The development of superheated steam (SHS) furnace with ultra-high temperature was studied. We have proposed the use of atmospheric-pressure microwave-induced steam plasma as the heat source for SHS furnace. Since the sustainable operation and appropriate temperature distributions of microwave steam plasma play key roles in constructing an SHS furnace, the characteristics of steam plasma were initially investigated. The experimental results revealed that several conditions of microwave discharge existed for stable plasma formation. The limitations of heat-tolerance of a discharge tube, which are attributed to the rise of temperature, were confirmed at low steam flow rate, high input power, and large diameter of a discharge tube. Reducing the diameter of the discharge tube also caused the unstable formation of microwave steam plasma. Then, the furnace was assembled by joining the discharge tube of microwave steam plasma. The flat temperature distributions inside the furnace were observed as strongly affected by the steam flow rate. The proposed furnace could exhibit an ultra-high temperature over 1200 °C.
| Original language | English |
|---|---|
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Applied Thermal Engineering |
| Volume | 52 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2013 Jan 1 |
| Externally published | Yes |
Keywords
- Furnace
- Microwave discharge
- Steam plasma
- Superheated steam
- Swirl flow
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Industrial and Manufacturing Engineering