System solution: 4-draught steam boiler with combined heat and power (CHP)
3
Systemlösung – 6 720 885 509 (2018/03)
1 System solution: 4-draught steam boiler with combined heat and power (CHP)
On the background of increasingly scarce natural
resources, sharp increases in energy prices over the last
few years and a turnaround in energy policy, it has
become indispensable, not only from an ecological, but
also from an economic point of view, to review and
reduce one's own energy consumption.
The industrial sector, the most energy-demanding of the
economic sectors, provides a large savings potential.
Often industrial applications require a steam supply
system. Such a system can be optimised concerning
energy consumption and economic viability by using
combined heat and power (CHP) in combination with a
CHP module. In the context of a turnaround in energy
policy, CHP plays a very important role. Its part in the
power generation mix in Germany will increase until
2020 to 25 %.
1.1 Notice on technical guide
The existing technical guide “4-draught boiler and CHP
with MEC system” can be used as information to simplify
the planning and sizing of 4-draught steam boiler system
in combination with combined heat and power unit by
Bosch.
The technical guide shall help you to understand the
basics for using flue gas heat for creating steam in 4-
draught steam boilers and for designing the components
of a boiler system in conjunction with a combined heat
and power unit (CHP).
The existing technical guide will show possible ways of
execution and respond to open questions concerning
planning, calculation, economic viability and quotation.
1.2 System solution
For commercial and industrial applications, the use of a
CHP system in conjunction with a steam boiler with
integrated waste heat use can be an efficient alternative.
Here, the CHP unit (design as CHP module for external
flue gas use) creates electrical current. A downstream
boiler system uses the hot flue gases of the CHP for
efficient creation of process vapour. The motor heat of
the CHP module can be used for make-up water
preheating, for heating or for DHW heating.
The steam boiler with waste heat utilisation is a
conventionally fired 3-draught steam boiler with
integrated additional fourth draught (4-draught steam
boiler). The hot flue gas of the CHP module is led
through the boiler to support steam production. Thanks
to the integrated combustion in 4-draught steam boilers,
steam peak load boilers are not necessary here that are
usually required with pure waste heat boilers.
Investment costs, space requirements and equipment
effort can be reduced significantly.
The use of a CHP in combination with a 4-draught steam
boiler is gently on the environment in more than one
respect.
The most important aspect is the considerably lower
consumption of primary energy compared to
conventional, separated production of current, steam
and heat. With a CHP, natural resources are saved and
the environment is protected from pollutants from other
combustion processes.
For the combination of a 4-draught steam boiler series
UL-S by Bosch Industriekessel GmbH and a CHP system
by Bosch KWK Systeme GmbH, different system
hydraulics are proposed in this document and their
planning and execution is described (Æ chapter 3.4,
page 34). These are suggestions that allow a simple
realisation.
To Next Page
Loading...
