Other tests showed that the duty increased more considerably
with an increase of pressure, so that mantles used, or which had been
previously used, at a pressure of 5 inches gave duties of 115 to 125
candles per cubic foot.
It should be noted that the burners so far considered are small, being
intended for domestic purposes only; larger burners exhibit higher
efficiencies. For instance, a set of French incandescent acetylene
burners examined by Fouche showed:
_________________________________________________________________
| | | | | |
| Size of Burner | Pressure | Cubic Feet | Light in | Candles per |
| in Litres. | Inches. | per Hour. | Candles. | Cubic Feet. |
|________________|__________|____________|__________|_____________|
| | | | | |
| 20 | 5.9 | 0.71 | 70 | 98.6 |
| 40 | 5.9 | 1.41 | 150 | 106.4 |
| 70 | 5.9 | 2.47 | 280 | 113.4 |
| 120 | 5.9 | 4.23 | 500 | 118.2 |
|________________|__________|____________|__________|_____________|
By increasing the pressure at which acetylene is introduced into burners
of this type, still larger duties may be obtained from them:
_________________________________________________________________
| | | | | |
| Size of Burner | Pressure | Cubic Feet | Light in | Candles per |
| in Litres.
Pages:
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554