deutschland en Service Technical glossary

Technical glossary

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Nett calorific value (lower heating value)

The amount of heat released throught the complete combustion of a cubic metre of gas (at standard temperature and pressure) or a kilogram of fuel oil, when the water produced by the combustion is a vapor. It is measured in kWh/m3 or kWh/kg.

Nitrogen oxide

A pollutant emission which can cause "acid rain" (emissions). The term "nitrogen oxide" or "oxides of nitrogen" encompasses the various gaseous oxides of nitrogen. Nitrogen oxide is also abbreviated to NOX, because the different oxidisation stages of nitrogen can create various nitrogen-oxygen compounds. With modern boilers and burner systems nitrogen oxide emissions are in some instances considerably lower than the mandated limits.

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