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A novel Application of a Screw Rotor Engine as an Expansion Device in an Organic Rankine Cycle


Veröffentlichungsart
Begutachtete Publikation

Fakultät/Einrichtung
Natur und Technik

Institutszugehörigkeit
Julius Robert Mayer - Institut für Energietechnik
http://www.hs-bremen.de/internet/de/forschung/einrichtungen/jrmi/

Verfasser
Smolen, Slawomir, Prof. Dr.-Ing.
Eicke, Albrecht, Dipl.-Ing.

Forschungsprojekt
DAMPFKRAFTANLAGE MIT ORGANISCHEM ARBEITSMEDIUM (ORGANIC RANKINE CYCLE) - KONZEPTENTWICKLUNG UND ERRICHTUNG EINES VERSUCHS- UND DEMONSTRATIONSPRÜFSTANDES
http://www.hs-bremen.de/internet/de/forschung/projekte/detail/index_15189.html

Autor_innen, Jahr, Titel
Janusz T. Cieslinski, Gdansk University of Technology, Editor
Slawomir Smolen, University of Applied Sciences Bremen, Co-Editor

Weitere Informationen
Gdansk University of Technology Publishers, Gdansk, Polen
ISBN 978-83-7348-454-2

Anmerkung
Volume 5


Developments in Mechanical Engineering
Gdansk University of Technology Publishers Volume 5
Editor of Scientific Publications
Editor of Scientific Publications
Contents
Contents of Volume 5
A NOVEL APPLICATION OF A SCREW ROTOR ENGINE
AS AN EXPANSION DEVICE IN AN ORGANIC
RANKINE CYCLE

Slawomir Smolen, Albrecht Eicke
Introduction
From the perspective of the growing scarcity of primary energy resources, low temperature heat or waste heat from various processes is becoming more and more "attractive" as a secondary energy source. New energy conversion technologies are required to utilize these energy resources, which are suitable for power generation without causing additional environmental pollution. One of the possible technologies to utilize low-grade heat sources is the Organic-Rankine-Cycle (ORC). This system uses organic substance as a working fluid and consists of evaporator (heating area), expansion device, condenser (cooling area), feed pump and some auxiliary equipment. The typical examples for the natural low-grade ORC heat sources with their available temperatures ranging between 60 and 300°C are solar radiation, geothermal energy, biomass and others, but the main goal of the present investigations is the possible utilization and use of waste heat from different industrial and communal energy supply systems as mentioned in the first sentence.
The additional electricity produced by a down-sized ORC is typically in the range of a few tens of kW, thus requiring a low-size recovery plant which can be alternatively referred to as "micro-Rankine cycle". The main advantage of such a design is the possibility to select the most adequate fluid in order to allow acceptable efficiency and cost-effective design, regardless of the low power output.
The ORC is not the only possible technology to recover low temperature heat. The Stirling and Ericsson cycles, the water-ammonia cycle, the supercritical CO2 cycle or the thermoelectric generator could be an effective alternative to an ORC-process. It depends on the specific application conditions, which technology could be suitable and most efficient from different points of view. Thus, in many cases investigated the Organic Rankine Cycle seems to be the preferable option.

 

 

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