Looking for a minimum exergy destruction in hierarchical cycle

Tomasz Kowalczyk; Paweł Ziółkowski; Janusz Badur

Looking for a minimum exergy destruction in hierarchical cycle

Abstract

The paper presents results of energy analysis, complemented with an exergy balance, of hierarchical thermodynamic cycle. Proposed cycle is a binary vapour cycle based on a model of real supercritical steam power plant. Energy analysis is used to preliminary optimization of the cycle and the exergy losses analysis is proposed to perform optimization of heat transfer processes, which are essential for hierarchical cycles. Proposed cycle consists of a steam cycle bottomed with an ORC (Organic Rankin Cycle) installation. This coupling has negative influence onto energy efficiency, however this modification allow to reduce sizes of the power unit, by decreasing LP (Low Pressure) steam turbine cylinder and steam condenser. Reduction of the “cold end” of the turbine is desirable from economic and technical reasons. In the paper the proposed binary vapour cycle is shown, next the mathematical model of chosen power plant thermodynamic cycle used to calculation is briefly presented. At the end the procedure of the binary vapour design and optimization is elaborate, in meaning of size reduction and limitation of exergy losses.

Authors (3)

Tomasz Kowalczyk
- Instytut Maszyn Przepływowych PAN, Środowiskowe Studium Doktoranckie WM PG Zakład Konwersji Energii
Paweł Ziółkowski
- Instytut Maszyn Przepływowych PAN, Środowiskowe Studium Doktoranckie WM PG Zakład Konwersji Energii
Janusz Badur
- Instytut Maszyn Przepływowych PAN Zakład Konwersji Energii

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Category:: Monographic publication
Type:: rozdział, artykuł w książce - dziele zbiorowym /podręczniku w języku o zasięgu międzynarodowym
Title of issue:: Inżynieria Odnawialnych Źródeł Energii, Inżyniera Pomp Ciepła strony 196 - 218
Language:: English
Publication year:: 2015
Bibliographic description:: Kowalczyk T., Ziółkowski P., Badur J.: Looking for a minimum exergy destruction in hierarchical cycle// Inżynieria Odnawialnych Źródeł Energii, Inżyniera Pomp Ciepła/ ed. Adam Mroziński Bydgoszcz: Wydawnictwo Fundacji Rozwoju Mechatroniki, 2015, s.196-218
Verified by:: Gdańsk University of Technology