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Dynamic oxygen measuring
From its inception, Nilsson Shipping's charter has been to design, build, sell and service unique products in chosen market segments and to support these products with a world-class sales and service. Our fault-proof low cost continuous oxygen measuring systems measure the concentration of oxygen and temperature in the waste gas of furnaces, if combustion circumstances change, for ex. between summer and winter the oxygen quantity can vary with more than 20% under the influence of changes in temperature with 20 °C, at the same atmospheric pressure (the barometric pressure). With our low cost system its possible to manually adjust the Fuel-Air Ratio so the O2-content in the flue gas is in optimum values. By adding new technology that did not exist when the plant was first erected, we can make it an operationally and financially attractive asset adapted to modern environmental requirements. The panel can be built in pre-built enclosures or purpose built enclosures to customers requirements. Combustion temperatures and O2-content are easily viewed on a LCD display, or analog panel instrument customers choice. Nilsson Shipping offers an extensive aftercare service to all clients and is committed to the development of environmentally friendly products.
Dynamic Oxygen Measuring Benefits
- Accurate Fuel-Air Ratio Control
- Decrease fuel consumption and CO2 emissions
- Reduces the NOx compound (Less harmful emissions).
- Reduces the SO3 compound (Less corrosion).
- Gives the highest possible combustion technical efficiency.
- Fuel Saving Oxygen Trim
- Easy to install; the same set-up as for a temperature sensor
- Easy to Use Touch Screen Operation and Commissioning
- Suitable at oil, gas, coal and biofuel combustion
- Direct measuring of flue gases
- Small probe dimensions
- Easy Operation, Non trained personnel can operate
- Low Cost Solution, Minimal operating costs and long sensor life.
Oxygen sensor
In a furnace with 10 MW and 5,000 operating hours per year, the consumption of natural gas is reduced 18,126 m3 per year, the fuel costs (at 2.5 ct per KW) by 4,530 € and the CO2 emissions by 41,743 kg. The investment will pay already after a few months.
Because some boilers operate with a very high percentage of excess oxygen, it is common for the first year savings to be substantially higher. However, much of that savings can be attributed to a more reasonable manual tuning of the boiler, and not necessarily from the installation of an automatic O2 control system. Well-tuned boilers can expect savings of 5 - 10%.
Density and Specific Weight of Air at Standard Atmospheric Pressure in SI Units;
At -10°C and 101.325 kPa, dry air has a density of ρSTP = 1.342 kg/m3.
At 0°C and 101.325 kPa, dry air has a density of ρSTP = 1.293 kg/m3.
At 15°C and 101.325 kPa, dry air has a density of ρSTP = 1.225 kg/m3.
At 25°C and 101.325 kPa, dry air has a density of ρSTP = 1.184 kg/m3.
|
Temperature
- t -
(oC) |
Density
- ρ -
(kg/m3) |
Specific Weight
- γ -
(N/m3) |
|
-40 |
1.514 |
14.85 |
|
-20 |
1.395 |
13.68 |
|
0 |
1.293 |
12.67 |
|
5 |
1.269 |
12.45 |
|
10 |
1.247 |
12.23 |
|
15 |
1.225 |
12.01 |
|
20 |
1.204 |
11.81 |
|
25 |
1.184 |
11.61 |
|
30 |
1.165 |
11.43 |
|
40 |
1.127 |
11.05 |
|
50 |
1.109 |
10.88 |
|
60 |
1.060 |
10.40 |
|
70 |
1.029 |
10.09 |
|
80 |
0.9996 |
9.803 |
|
90 |
0.9721 |
9.533 |
|
100 |
0.9461 |
9.278 |
|
200 |
0.7461 |
7.317 |
|
300 |
0.6159 |
6.040 |
|
400 |
0.5243 |
5.142 |
|
500 |
0.4565 |
4.477 |
|
1000 |
0.2772 |
2.719 |
|