Searched for: subject%3A%22organic%255C%2Brankine%255C%2Bcycle%22
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Krempus, D. (author), Bahamonde, Sebastian (author), van der Stelt, T.P. (author), Klink, Wolfgang (author), Colonna, Piero (author), de Servi, C.M. (author)
The use of mixtures as working fluids of organic Rankine cycle (ORC) waste heat recovery (WHR) power plants has been proposed in the past to improve the matching between the temperature profile of the hot and the cold streams of condensers and evaporators, thus to possibly increase the energy conversion efficiency of the system. The goal of...
journal article 2024
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Tosto, F. (author), Wheeler, Andrew (author), Pini, M. (author)
In this work, we investigate the sources of dissipation in adiabatic boundary layers of non-ideal compressible fluid flows. Direct numerical simulations of transitional, zero-pressure gradient boundary layers are performed with an in-house solver considering two fluids characterized by different complexity of the fluid molecules, namely air...
book chapter 2023
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Boersma, Isaac (author)
The need for more efficient aircraft has spawned the conception of a variety of novel engine and aircraft architectures, such as the combined-cycle engine proposed by researchers at Delft University of Technology. To evaluate the potential benefits of these concepts comprehensively, in-depth performance simulations are required. Furthermore,...
master thesis 2022
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Tosto, F. (author), Giuffré, A. (author), Colonna, Piero (author), Pini, M. (author)
In this work we examine the flow deviation and its relationship to critical choking, i.e., choking of the meridional component of velocity, in transonic turbine cascades operating with non-ideal compressible flows. To this purpose, a generalized expression of the corrected flow per unit area as a function of both the thermodynamic state and...
journal article 2022
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Hariharan, Gayathri (author)
Organic Rankine Cycle systems are gaining increasing attention as a modular, cost-effective and decentralised thermal energy recovery solution. The design of an efficient expander in the ORC system is crucial to its rapid uptake by the industry. Compared to volumetric expanders, a radial turbine provides advantages in terms of flexibility and...
master thesis 2021
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Head, A.J. (author)
The vast number of pioneering theoretical developments inthe area of non-classical gas dynamics together with the rising number ofapplications of organic Rankine cycle (ORC) technology have shaped a new branchof fluid mechanics called non-ideal compressible fluid dynamics (NICFD). Thisfield of fluid mechanics is concerned...
doctoral thesis 2021
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van der Vries, André (author)
The global warming and increase in energy use demands the industry to come up with ideas to lower the CO<sub>2</sub> production and save valuable energy. Organic Rankine cycles have a great potential as low grade heat can be converted into electrical energy. In the last ten years, research in this particular field has increased together with the...
master thesis 2021
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Leverone, F.K. (author)
Exploring and utilising space to benefit humankind is undeniably a costly venture where the higher the mass of the satellite, the higher the cost to launch. However, the rewards of space-related achievements are indisputable. These achievements range from increasing our understanding of the universe using satellites, such as the Hubble Space...
doctoral thesis 2021
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van Senden, Jaap Jan (author)
The global energy demand is growing, while climate change is demanding a sustainable way of generating this energy. Ocean Thermal Energy Conversion (OTEC) can be a part of the solution for this problem. OTEC generates electricity by using the temperature difference between the surface water of the ocean and the water at 1000 meters depth as a...
master thesis 2020
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Bahamonde, Juan S. (author), de Servi, C.M. (author), Colonna, Piero (author)
The electric hybridization of heavy-duty road vehicles is a promising alternative to reduce the environmental impact of freight and passengers transportation. Employing a micro gas turbine as a prime mover offers several advantages: high power density, fuel flexibility, ultra-low emissions (without the need of exhaust after-treatment), low...
journal article 2020
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Pini, M. (author), de Servi, C.M. (author)
This paper documents a numerical study on entropy generation in zero-pressure gradient, laminar boundary layers of adiabatic non-ideal compressible fluid flows. The entropy generation is expressed in terms of dissipation coefficient $$C:\mathrm {d}$$ and its dependency on free-stream Mach number, fluid molecular complexity, and flow non...
conference paper 2020
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Stelwagen, Johan (author)
This thesis project aims to enable Bluerise to create a 3 [MW] plant for their OTEC system. The current model and lab setup used to create insight into the systems working mechanisms are based on a Kalina cycle configuration. This method uses a working fluid mixture of water and ammonia. After evaporation, the liquid and vapor are separated and...
master thesis 2019
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Roumpedakis, Tryfonas (author)
The rapid growth of power systems supplied by sustainable energy sources and the attempt towards the decrease of CO₂ emissions has resulted in the increase of decentralized energy systems over the last decades. Tri-generation systems utilizing an Organic Rankine Cycle (ORC) can offer a reliable alternative towards that direction. In particular,...
master thesis 2018
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Osakwe, Precious (author)
Transitioning to cleaner sources of energy and improving the efficiency of power generators are crucial in combating global warming. Organic Rankine Cycles (ORC) when coupled to heat emitting power generators allows for waste heat recovery; thus increasing the engine overall efficiency and reducing atmospheric pollution. Additionally,...
master thesis 2018
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Thimmanoor, Sai (author)
Carbon dioxide emission into the earth’s atmosphere by maritime activities are a concern for the people within and outside the industry. This is because of the environmental impacts that are caused by these greenhouse gas emissions which changes the very chemistry of this planet. These impacts can be mitigated by reducing the CO2 emissions which...
master thesis 2018
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Scalcerle, Lucrezia (author)
Organic Rankine Cycles (ORCs) are one of the technologies that can play an important role in the reduction of green house emissions. By converting low temperature energy sources in electricity, they are suitable for the exploitation of renewable sources (as solar and geothermal) and industrial waste heat. One of the most critical components in...
master thesis 2017
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Arumugam, Senthil Kumar (author)
Low-grade heat sources are abundant on earth but are majorly untapped due to lower thermodynamic efficiency at low temperatures and cost considerations. A cost-effective technology is needed to convert this energy resource into useful forms of energy. This work aims at optimizing Organic Rankine Cycle (ORC) based heat engine and a cogeneration...
master thesis 2017
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Kuikhoven, L.J. (author)
The oceans cover over 70% of the earth’s surface and are therewith the largest source of renewable heat available on the planet. Ocean Thermal Energy Conversion (OTEC) is a process that exploits this low-grade oceanic heat. A heat engine is employed to generate electricity from the small temperature gradient that is available between the...
master thesis 2017
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Bahamonde, Juan S. (author), Pini, M. (author), de Servi, C.M. (author), Colonna, Piero (author)
The preliminary fluid dynamic design of turbomachinery operating with non-standard working fluids and unusual operating conditions and specifications can be very challenging because of the lack of know-how and guidelines. Examples are the design of turbomachinery for small-capacity organic Rankine cycle and supercritical CO<sub>2</sub> cycle...
journal article 2017
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Bahamonde, Juan S. (author), Pini, M. (author), Colonna, Piero (author)
The fluid dynamic preliminary design of unconventional turbomachinery is customary done with meanline design procedures coupled with gradient-free optimizers. This method features various drawbacks, since it might become computationally expensive, and it does not provide design insights or guidelines to the designer. This work proposes a...
conference paper 2016
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