scholarly journals Combined Turbine and Cycle Optimization for Organic Rankine Cycle Power Systems—Part A: Turbine Model

Energies ◽  
2016 ◽  
Vol 9 (5) ◽  
pp. 313 ◽  
Author(s):  
Andrea Meroni ◽  
Angelo La Seta ◽  
Jesper Andreasen ◽  
Leonardo Pierobon ◽  
Giacomo Persico ◽  
...  
Keyword(s):  
Power Systems ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Turbine Model

Dynamic performance of an organic Rankine cycle system with a dynamic turbine model: A comparison study

2020 ◽  
Vol 181 ◽  
pp. 115940
Author(s):  
Yaxiong Wang ◽  
Jiangfeng Wang ◽  
Ziyang Cheng ◽  
Qingxuan Sun ◽  
Pan Zhao ◽  
...  
Keyword(s):  
Dynamic Performance ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Comparison Study ◽  
Cycle System ◽  
Turbine Model

Design of organic Rankine cycle power systems for maritime applications accounting for engine backpressure effects

2020 ◽  
Vol 178 ◽  
pp. 115527 ◽  
Author(s):  
Enrico Baldasso ◽  
Maria E. Mondejar ◽  
Jesper Graa Andreasen ◽  
Kari Anne Tveitaskog Rønnenfelt ◽  
Bent Ørndrup Nielsen ◽  
...  
Keyword(s):  
Power Systems ◽  
Organic Rankine Cycle ◽  
Rankine Cycle

scholarly journals Optimization of organic Rankine cycle power systems considering multistage axial turbine design

2018 ◽  
Vol 209 ◽  
pp. 339-354 ◽  
Author(s):  
Andrea Meroni ◽  
Jesper Graa Andreasen ◽  
Giacomo Persico ◽  
Fredrik Haglind
Keyword(s):  
Power Systems ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Axial Turbine ◽  
Turbine Design

Optimization of Cycle and Expander Design of an Organic Rankine Cycle Unit Using Multi-Component Working Fluids

2016 ◽  
Author(s):  
Andrea Meroni ◽  
Jesper Graa Andreasen ◽  
Leonardo Pierobon ◽  
Fredrik Haglind
Keyword(s):  
Low Temperature ◽  
Power Systems ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Fluid Temperature ◽  
Heat Sources ◽  
Working Fluids ◽  
Turbine Performance ◽  
Temperature Heat

Organic Rankine cycle (ORC) power systems represent attractive solutions for power conversion from low temperature heat sources, and the use of these power systems is gaining increasing attention in the marine industry. This paper proposes the combined optimal design of cycle and expander for an organic Rankine cycle unit utilizing waste heat from low temperature heat sources. The study addresses a case where the minimum temperature of the heat source is constrained and a case where no constraint is imposed. The former case is the waste heat recovery from jacket cooling water of a marine diesel engine onboard a large ship, and the latter is representative of a low-temperature geothermal, solar or waste heat recovery application. Multi-component working fluids are investigated, as they allow improving the match between the temperature profiles in the heat exchangers and, consequently, reducing the irreversibility in the ORC system. This work considers mixtures of R245fa/pentane and propane/isobutane. The use of multi-component working fluids typically results in increased heat transfer areas and different expander designs compared to pure fluids. In order to properly account for turbine performance and design constraints in the cycle calculation, the thermodynamic cycle and the turbine are optimized simultaneously in the molar composition range of each mixture. Such novel optimization approach enables one to identify to which extent the cycle or the turbine behaviour influences the selection of the optimal solution. It also enables one to find the composition for which an optimal compromise between cycle and turbine performance is achieved. The optimal ORC unit employs pure R245fa and provides approximately 200 kW when the minimum hot fluid temperature is constrained. Conversely, the mixture R245fa/pentane (0.5/0.5) is selected and provides approximately 444 kW when the hot fluid temperature is not constrained to a lower value. In both cases, a compact and efficient turbine can be manufactured.

scholarly journals Organic Rankine Cycle Power Systems: From the Concept to Current Technology, Applications, and an Outlook to the Future

2015 ◽  
Vol 137 (10) ◽  
Author(s):  
Piero Colonna ◽  
Emiliano Casati ◽  
Carsten Trapp ◽  
Tiemo Mathijssen ◽  
Jaakko Larjola ◽  
...  
Keyword(s):  
Power Systems ◽  
Research And Development ◽  
Thermal Energy ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Biomass Combustion ◽  
Main Stream ◽  
Advantages And Disadvantages ◽  
The Many

The cumulative global capacity of organic Rankine cycle (ORC) power systems for the conversion of renewable and waste thermal energy is undergoing a rapid growth and is estimated to be approx. 2000 MWe considering only installations that went into operation after 1995. The potential for the conversion of the thermal power coming from liquid-dominated geothermal reservoirs, waste heat from primary engines or industrial processes, biomass combustion, and concentrated solar radiation into electricity is arguably enormous. ORC technology is possibly the most flexible in terms of capacity and temperature level and is currently often the only applicable technology for the conversion of external thermal energy sources. In addition, ORC power systems are suitable for the cogeneration of heating and/or cooling, another advantage in the framework of distributed power generation. Related research and development is therefore very lively. These considerations motivated the effort documented in this article, aimed at providing consistent information about the evolution, state, and future of this power conversion technology. First, basic theoretical elements on the thermodynamic cycle, working fluid, and design aspects are illustrated, together with an evaluation of the advantages and disadvantages in comparison to competing technologies. An overview of the long history of the development of ORC power systems follows, in order to place the more recent evolution into perspective. Then, a compendium of the many aspects of the state of the art is illustrated: the solutions currently adopted in commercial plants and the main-stream applications, including information about exemplary installations. A classification and terminology for ORC power plants are proposed. An outlook on the many research and development activities is provided, whereby information on new high-impact applications, such as automotive heat recovery is included. Possible directions of future developments are highlighted, ranging from efforts targeting volume-produced stationary and mobile mini-ORC systems with a power output of few kWe, up to large MWe base-load ORC plants.

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