Because of the low exhaust
gas temperatures of condensing boiler systems, the exhaust gas transport can
not be realised using the natural buoyancy of the gas.
- Give reasons for the
modifications that are necessary because of this in contrast to the conventional
way to remove exhaust gases.
- Explain in more detail
how the exhaust gas removal has to be realised with condensing boiler systems.
Since the exhaust gases
are condensing in the exhaust gas pipe, humidity insensitive materials have
to be used for the exhaust gas pipe.
- Explain and give reasons
which installation has to be there in the case of exhaust gas pipes of condensing
The so called "concentric
shaft arrangement" of the exhaust gas pipe is based on the countercurrent
principle (second possibility: "parallel shaft arrangement").
- Explain the terms "concentric"
and "parallel shaft arrangement".
- Draw the two different
Condensing boiler systems
that operate room air independently are so called "pressurised systems".
- Explain this principle.