Product category:
Plantwide control
News Release from: Siemens Process Automation | Subject: Simatic PCS 7 process control systems
Edited by the Engineeringtalk Editorial
Team on 27 September 2002
Controlling the cogeneration game
Controlling the complexity of combined heat and power installations to gain the maximum benefit from cogeneration technology presents a challenge to the most able of engineers.
Controlling the complexity of combined heat and power installations to gain the maximum benefit from cogeneration technology presents a challenge to the most able of engineers To enable their own engineers to design and build their own control system, Kappa SSK installed Siemens Simatic PCS 7 process control systems on two Centrax gas turbines at its plant in Birmingham, manufacturing raw material for the corrugated packaging industry
This article was originally published on Engineeringtalk on 8 Feb 2000 at 8.00am (UK)
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Combined heat and power (CHP), or cogeneration, is the simultaneous generation of electrical power and heat, and installations are of particular value to processes where large amounts of heat as well as electricity are consumed.
Usually the heat is recovered from the exhaust gases and cooling water of the generator's prime mover.
In the case of Kappa SSK the installations were powered by a 3MW Centrax gas turbine, installed in 1985, and a 5MW Centrax unit, commissioned in 2001, using the rejected thermal output to generate steam for the paper recycling process.
The PCS 7 is used to control the boiler, turbine and gas compressor, all components of the CHP installation.
Once committed to cogeneration, the plant had to be assured of a continuous and reliable supply of both heat and electrical power to secure continuity of production and predictability of energy costs, it is therefore inherent in a process of this nature that reliability is of supreme importance.
Although PCS 7 makes extensive use of the Simatic I/O system and Totally Integrated Automation, PCS 7 has the necessary hardware and software tools and features required of a process control system.
In choosing to use the Simatic PCS 7 as the control unit for the CHP installations, the engineers at Kappa SSK were taking advantage of the modularity of the PCS, which uses standard Simatic components.
Alan Clarke, Works Electrical Engineer said, "Siemens gave us a lot of assistance in explaining the more complicated aspects of the installation.
We received good service from Siemens".
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