Creating a Tool for Performance Assessment of Heat Extraction using the Example of the Combined Heat and Power Plant Heilbronn
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
This thesis is dealing with the development of a calculation model representing the processes of electricity generation and heat extraction of the combined heat and power (CHP) plant Heilbronn (Germany). Using the thermodynamic simulation software EBSILON® Professional, a tool is created, which is applied to elaborate possible optimization potentials and which enables analyzing existing operation procedures. In collaboration with the Royal Institute of Technology Stockholm and EnBW Energie Baden-Württemberg AG necessary boundary conditions are specified in order to construct a model, which on one hand simplifies the complex process design into an easy understandable and user-friendly program and which on the other is still able to describe the real mechanisms as accurately as necessary. Thereby this work defines design configurations, data input and calculation procedures in order to determine the qualifying factors required.
On the basis of a general description of the power plant and background information about the simulation software used, first of all the essential data points and approach of the development process and selection of components are stated. Thereby the implementation of base data and possible assumptions are defined, while the model is built in a number of steps. Afterwards the different parts are put together and the created tool is checked for its plausibility by comparing simulated values with real measurement data (trial runs). The different components’ characteristics are adjusted and existing and alternative processes of the district heating and process steam systems are simulated.
In this study not only the model creation itself, but also its application is investigated. Hereby two exemplary plant conditions are reconstructed and changes made in order to see how the system’s thermodynamic properties (temperature, pressure and enthalpy), mass flows and efficiencies adapt to new situations. Thereby nonexistent data points can be determined and analyzed. Beyond that important factors in the supply structure (bottlenecks) are pointed out as well as energy outputs, flow rates, temperatures and CO2-emmissions are investigated and evaluated.
In the future the created tool will be used to make an economic analysis, not only of the district heating system itself, but be part of a larger research – in combination with other studies – investigating the performance of the whole power plant. The developed concept aims for the implementation at the CHP plant in Heilbronn and will support the decision making process while saving time and money resources.
Place, publisher, year, edition, pages
2014. , 94 p.
CHP, combined heat and power, Simulation, Ebsilon
IdentifiersURN: urn:nbn:se:kth:diva-147195OAI: oai:DiVA.org:kth-147195DiVA: diva2:728389
Subject / course
Master of Science - Sustainable Energy Engineering
HPT Library, Brinellvägen 68, Stockholm (English)
Fakhrai, Reza, Dr.