Publication
Title
Assessing cogeneration activity in extraction-condensing steam turbines : dissolving the issues by applied thermodynamics
Author
Abstract
Extraction-condensing steam turbines mix cold-condensing and cogeneration activities making the respective power and fuel flows not directly observable. A flawed assessment of the flows is causing confusion and bias. A steam expansion path on a Mollier diagram reveals the design characteristics of a thermal power plant and of its embedded combined heat and power (CHP) activities. State variable data on a unit mass of steam, entering the turboset as life steam and leaving it at one of the heat extraction exhausts, provide the roster of the power-heat production possibility set of the plant. The actual production possibilities are drawn from the roster by applying capacity data and constraints on the heat extraction points. Design power-to-heat ratios of CHP activities are univocally identified, allowing accurate assessments of cogenerated power. This information is needed for proper incentive regulation of CHP activities, pursuing maximization of CHP quality and quantity. Quality is gauged by the power-to-heat ratio, principally a design (investment) decision. Quantity is gauged by the operational amounts of recovered heat exhausts. Optimal regulatory specificity is attained through setting generic frameworks by technology, accommodating investment and operational decisions by plant owners. Our novel method is explained and applied with numerical data, also revealing the flaws in present regulations.
Language
English
Source (journal)
Transactions of the ASME : journal of energy resources technology / American Society of Mechanical Engineers. - New York, N.Y., 1979, currens
Publication
New York, N.Y. : American Society of Mechanical Engineers , 2016
ISSN
0195-0738 [print]
1528-8994 [online]
DOI
10.1115/1.4033424
Volume/pages
138 :5 (2016) , p. 1-6
Article Reference
052005
ISI
000382754400008
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 06.10.2016
Last edited 09.10.2023
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