System components
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Systemlösung – 6 720 885 509 (2018/03)
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System components
2.1
General
The CHP system with waste heat use for steam
generation consists of 2 key components plus required
accessories.
The key components are:
• A CHP module, designed for flue gas heat utilisation
(without flue gas heat exchanger), consisting of
combustion engine and generator
• A steam boiler with combustion and integrated fourth
draught for waste heat use
• The superordinate control of the combination CHP
and 4-draught steam boiler should be effected by the
Bosch control system MEC system.
The combustion motor is intended for activating the
generator. The hot flue gas, that is created during the
combustion process, with temperatures above 400 °C is
used in the 4-draught steam boiler for steam production.
In addition, during operation of the CHP module, engine
coolant with a temperature of up to 85 °C is created.
Depending on the loss of condensate in the steam
network, this can be used for make-up water preheating
in the steam boiler or for space heating or DHW heating.
The system control “MEC system” controls the
combination of CHP module and 4-draught steam boiler
and optimally integrates is in the compete energy
production system on site.
Fig. 1 Simplified function diagram 4-draught steam boiler and CHP module and CHP (simplified depiction)
[1]
4-draught steam boiler
[2]
Economiser
[3]
Chimney
[4]
Flue gas heat exchanger
[5]
Water service module
[6]
Mains power supply
[7]
Consumer
[8]
Manifold
[9]
Memory
[10] CHP
[11] Flue with bypass
Current
Water/condensate
Steam
Flue gas
If a replacement power supply is necessary, e.g. as in
hospitals or other safety-relevant facilities, a CHP
module can also be used as standby power generator.
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