Please use this identifier to cite or link to this item:
Main Title: Evaluation of an energy- and exergy-based generic modeling approach of combined heat and power plants
Author(s): Mollenhauer, Eike
Christidis, Andreas
Tsatsaronis, George
Type: Article
Language Code: en
Abstract: Reduced models of combined heat and power plants are required for different applications. Among other usages, they are implemented as mixed integer linear programs (MILP) in energy market models or price-based unit commitment problems to study the economic feasibility and optimal operation strategies of different units. Generic models are particularly useful when limited information is available for each considered plant. This paper presents a MILP modeling approach for combined heat and power (CHP) plants. The approach is based on energy and exergy balances and a few typical plant characteristics for different operating conditions. The reduction of electrical power output due to heat extraction is estimated by the transferred exergy to the district heating network. Furthermore, the accuracy, strengths and limitations of this approach are investigated for various CHP plant types with extraction condensing turbines designed for district heating systems. Therefore, detailed thermodynamic cycle simulations of CHP plants including part load operations are used to obtain the real plant operating conditions to compare them to the results of the described generic approach. The validation of the reduced, generic model shows that the accuracy mainly depends on the effectiveness of the heat extraction from the CHP plant. In addition, it can be seen that the main advantage of the presented exergy-based method is the inherent consideration of the feed flow temperature for the calculation of the power reduction due to heat extraction.
Issue Date: 29-Feb-2016
Date Available: 31-May-2018
DDC Class: 333.7 Natürliche Ressourcen, Energie und Umwelt
Subject(s): CHP
combined heat and power
mixed integer linear programs
district heating
extraction condensing turbine
thermodynamic simulation
unit commitment
Sponsor/Funder: BMWi, 03ET1188A, EnEff:Wärme - Der Beitrag thermischer Speicher zur Steigerung der Energieeffizienz, Flexibilität und Wirtschaftlichkeit der Fernwärme- und Stromerzeugung in KWK-Anlagen
Journal Title: International Journal of Energy and Environmental Engineering
Publisher: Springer
Publisher Place: Berlin ; Heidelberg
Volume: 7
Issue: 2
Publisher DOI: 10.1007/s40095-016-0204-6
Page Start: 167
Page End: 176
EISSN: 2251-6832
ISSN: 2008-9163
Appears in Collections:FG Energietechnik und Umweltschutz » Publications

Files in This Item:
File Description SizeFormat 
10.1007_s40095-016-0204-6.pdf986.96 kBAdobe PDFThumbnail

This item is licensed under a Creative Commons License Creative Commons