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Screw Engine as Expansion Machine Applied in an ORC-Test-Installation – the First Operating Experiences – Lubrication System for a Screw Machine in Reverse Rotation


Veröffentlichungsart
Beitrag auf Tagung

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.

Jahrgang
2014

Name(n), Titel
International Conference on Screw Machines

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

Weitere Informationen zur Veranstaltung
VDI-Berichte (Energy and Environment), International Conference on Screw Machines

Veranstaltungsort
TU Dortmund University - 2014

Datum
23.-24.09.2014

Anmerkung
Abstract:
As result of a previous theoretical research work about effective low enthalpy energy use from biogas installation a special ORC-concept has been developed and analysed [1, 2, 3]. The main features of the concept are two heat input stages and two expansion stages corresponding to the heat transfer temperatures and ratios in the exhaust gas heat exchanger of a combustion engine (specifically a gas motor in a biogas plant) and in the cooling system of the engine. In order to optimize the pressure ratios and thermal efficiency, the high-pressure expansion is carried out in a micro-turbine, and the residual expansion on the lower temperature and pressure level - in a screw engine.
Though, a big practical challenge is the adoption of proper and effective expansion devices for the ORC-Installation. Relating to the theoretical concept a special test bench has been developed und assembled in the Laboratory for Energetic of the University of the Applied Sciences in Bremen. The main goal of this installation is testing the operation of expansion machines, especially screw engines. For this purpose a VariScrew VMY 046 refrigerant screw compressor has been used, chosen from the product range of the manufacturer “Aerzen”. In order to use a compressor as expansion device some important modifications are essential, which has been developed and implemented.
First of all the compressor lubrication system needs some adjustments to operate correctly as a screw engine [4, 5].



 

 

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