Abstract
Recently, it is concerned with the problem of environmental pollution in the world, and the prevention of exhaust emission is enforcing day by day.
The air pollution from vessel is also no exception. The regulation for pollution materials in the exhaust emission from the marine diesel engine will be enforced a few years after. This draft of regulation is now examining, but measurement data have been short and the measuring method itself seems to be unclear.
The purpose of this study is to make an objective technique that measures pollution materials in the exhaust emission from vessel. There are many unknown factors in the measuring method at present yet. But we restrict only the oxide of nitrogen ( common name: NOx ) in this report.
When the exhaust gas measurement is carried out on board, following items must be taken into account with the field condition:
•Practicality, especially portability
•Reliability of measured results
Investigations about following items are described in this report:
•Difference of measured data due to the difference of the measurement principle
•Difference depending whether the sampling tube is heated or not
•Response of the measuring system
