- Source: Thermic siphon
Thermic siphons (alt. thermic syphons) are heat-exchanging elements in the firebox or combustion chamber of some steam boiler and steam locomotive designs. As they are directly exposed to the radiant heat of combustion, they have a high evaporative capacity relative to their size. By arranging them near-vertically, they also have good water circulation by means of the thermosyphon effect.
History
The concept of a self-circulating thermic syphon began with stationary boilers and relatively simple Galloway tubes. They reached their peak in steam locomotive boilers, where the complexity of a syphon was justified by the need for a compact and lightweight means of increasing boiler capacity. One of the best-known forms for locomotives was invented by the English locomotive engineer John L. Nicholson who received a US patent. The Nicholson form combined a complex shape that provided more heating area in a given space than did the earlier tubes and funnels, yet was simple to make, being folded from a single sheet of steel.
Flued boilers
The first high-pressure boilers were a large drum with a central flue, such as the Cornish and Lancashire boilers. Simple tubes were inserted across this flue.
See also
Thermosiphon
References
External links
Photo of lower tube-sections of thermic siphons on Battle of Britain class no. 34059 Sir Archibald Sinclair
Kata Kunci Pencarian:
- Thermic siphon
- Thermosiphon
- BNR class NM
- SR Leader class
- Chesapeake and Ohio Greenbrier
- Glossary of boiler terms
- Rio Grande class K-37
- Lima Locomotive Works
- Sentinel boiler
- Boston and Maine 3713
