HIERARCHICAL CYCLES IN MODERN POWER SYSTEMS – EXERGY ANALYSIS UNDER PART LOADS

Tomasz Kowalczyk; Paweł Ziółkowski; Sebastian Kornet

HIERARCHICAL CYCLES IN MODERN POWER SYSTEMS – EXERGY ANALYSIS UNDER PART LOADS

Abstract

The aim of the paper is to investigate thermodynamic efficiency of advanced hierarchic power cyclesunder partial loads by using of exergy analyze. Advanced hierarchical power systems arecomposed of few energy conversion cycles, most common are steam and gas cycles in various configurations, but they may contain fuel cells, ORC, lithium bromide absorption chillers and others. Moreover hierarchical cycles can be powered by several different sources of energyjointly, like nuclear energy, coil, natural gas or biomass. Combination of different kinds of energy conversion cycles can provide number of advantages like higher exergy efficiency, better cooperation with fuel and exhaust gases cleaning systems or carbon capture and storage systems, correlated high efficient production of synthetic fuel or hydrogen. The subject is particularly important in modern power systems where high flexibility of generating units is necessary to meet the power grid requests. Hierarchical power cycles are in this field unique. On the one hand their maintenanceis complicated, because change of each parameter of each machine in the cycle influence onto whole cycle. On the other hand this creates an opportunity to select the most suitable parameters and lead themaintenance under partial loads in way that will provide better efficiency of the thermodynamic cycle and is more proper in meaning of safety of the machinery.

Authors (3)

Tomasz Kowalczyk
- Instytut Maszyn Przepływowych; Środowiskowe Studium Doktoranckie Zakład Konwersji Energii; Wydział Mechaniczny PG
Paweł Ziółkowski
- Instytut Maszyn Przepływowych; Środowiskowe Studium Doktoranckie Zakład Konwersji Energii; Wydział Mechaniczny PG
Sebastian Kornet
- Instytut Maszyn Przepływowych; Środowiskowe Studium Doktoranckie Zakład Konwersji Energii ; Wydział Mechaniczny PG

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Category:: Articles
Type:: artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
Published in:: Transactions of the Institute of Fluid-Flow Machinery no. 129, pages 3 - 23,
ISSN: 0079-3205
Language:: English
Publication year:: 2015
Bibliographic description:: Kowalczyk T., Ziółkowski P., Kornet S.: HIERARCHICAL CYCLES IN MODERN POWER SYSTEMS – EXERGY ANALYSIS UNDER PART LOADS// Transactions of the Institute of Fluid-Flow Machinery. -Vol. 129., (2015), s.3-23
Verified by:: Gdańsk University of Technology