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Optimization of overcritical Organic Rankine Cycle


Veröffentlichungsart
Beitrag auf Tagung

Fakultät/Einrichtung
Natur und Technik

Institutszugehörigkeit
Julius Robert Mayer - Institut für Energietechnik
Hochschule Bremen
Neustadtswall 30
28199 Bremen
http://www.hs-bremen.de/internet/de/forschung/einrichtungen/jrmi/therm/

Verfasser
Smolen, Slawomir, Prof. Dr.-Ing.
Wang, Qingquan

Jahrgang
2015

Name(n), Titel
Optimization of overcritical Organic Rankine Cycle

Weitere Informationen zur Veranstaltung
XXII International Symposium - Research - Education - Technology

4. Internationale Konferenz - Niedertemperatur- und Abwärmenutzung in Kommunalen und Industriellen Energieversorgungssystemen

Veranstaltungsort
Hochschule Bremen
Neustadtswall 30
28199 Bremen

Datum
24. - 25- September 2015

Anmerkung
http://www.hs-bremen.de/internet/de/forschung/einrichtungen/jrmi/intercon/


Introduction
The growth of population urges energy consumption. However, even though the amount of energy generated by industrial power plants has been increased since last few decades, more than 50% of the energy consumed is lost as waste heat (Lecklider, 2013). In this context, waste heat recovery technology is to gather low-grade heat sources and to regenerate power. A common employment of waste heat recovery is to utilize ORC (Organic Rankine Cycle).
In this research, thermal efficiency has been analyzed from different point of views. Thermal efficiencies for 10 different working fluids have been calculated under different frame conditions. First the subcritical or critical ORC is studied. Second the overcritical cases are considered and the optimization of thermal efficiency for overcritical ORC is discussed as the main topic of the presented paper.
Optimization of ORC thermal efficiency can be explored from various aspects. Here lists several possibilities of thermal efficiency optimization procedure.
- Thermal optimization
- Working fluid selection
- Minimization of exergy losses between heat source and the ORC
- Optimization of the components and minimization of the energy losses in the components and connecting pipe
lines Much research work has been done in optimization of ORC systems. Bândean et al. implemented organic working fluid selection method with a special fluid database, which builds a model for further optimization study. Sun et al. studied the impact of controlled variables, including working fluid mass flow rate, turbine inlet and outlet pressure and temperature. Borsukiewicz-Gozdur studied the influence of recuperation in ORC power plant. In his research, three ORC solutions were compared, one with basic ORC, one with internal recuperation and one with external heat recuperation, and it is suggested that the evaporation temperature of working fluid fundamentally affects the maximum power output.

Plakat
4. Internationale Konferenz LTHU
4. Internationale Konferenz - Niedertemperatur- und Abwärmenutzung in Kommunalen und Industriellen Energieversorgungssystemen
 

 

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