Searched for: author%3A%22de+Servi%2C+C.M.%22
(1 - 17 of 17)
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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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Ascione, F. (author), Colonna, Piero (author), de Servi, C.M. (author)
The aircraft Environmental Control System (ECS) is the primary consumer of non-propulsive power at cruise conditions, hence, its performance optimization is crucial for the reduction of specific fuel consumption. A novel integrated system design optimization method is presented: thermodynamic cycle, component sizing and working fluid are...
journal article 2024
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Head, A.J. (author), Michelis, Theodorus (author), Beltrame, F. (author), Fuentes Monjas, B. (author), Casati, Emiliano (author), de Servi, C.M. (author), Colonna, Piero (author)
This paper describes an experiment conducted within the nozzle test section of the Organic Rankine Cycle Hybrid Integrated Device (ORCHID) aimed at providing accurate data for the validation of NICFD flow solvers [5]. A supersonic flow of the dense vapor siloxane MM established in the nozzle of the setup was characterized by means of the...
book chapter 2023
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Fuentes Monjas, B. (author), Head, A.J. (author), de Servi, C.M. (author), Pini, M. (author)
This work assessed the accuracy of the SU2 flow solver in predicting the isentropic expansion of Siloxane MM through the converging-diverging nozzle test section of the Organic Rankine Cycle Hybrid Integrated Device (ORCHID) [9]. The expansion is modeled using compressible Euler equations, and assuming adiabatic flow, while the fluid...
book chapter 2023
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Scaccabarozzi, R. (author), Martelli, Emanuele (author), Pini, M. (author), de Servi, C.M. (author), Chiesa, Paolo (author), Gatti, Manuele (author)
This paper documents a thermo-fluid-dynamic mean-line model for the preliminary design of multistage axial turbines with blade cooling applicable to supercritical CO<sub>2</sub> turbines. Given the working fluid and coolant inlet thermodynamic conditions, blade geometry, number of stages and load criterion, the model computes the stage-by...
journal article 2022
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Galieti, L. (author), de Servi, C.M. (author), Colonna, Piero (author), Silva, Paolo (author), Bombarda, Paola (author)
The use of mixtures in place of pure fluids in Organic Rankine Cycle (ORC) power plants is proposed as a possible improvement in terms of efficiency, environmental benefit and safety of the system. In particular, zeotropic mixtures exhibit a temperature variation (or glide) during phase change, because the components have different boiling...
abstract 2022
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Pini, M. (author), de Servi, C.M. (author), Spinelli, Andrea (author), Di Mare, Francesca (author), Guardone, Alberto (author)
contribution to periodical 2021
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Beltrame, F. (author), Head, A.J. (author), de Servi, C.M. (author), Pini, M. (author), Schrijer, F.F.J. (author), Colonna, Piero (author)
This paper reports one of the initial NICFD experiments in the nozzle test section of the ORCHID aimed at providing accurate data for the validation of flow solvers, albeit, at this stage of the research, the focus is limited to inviscid phenomena. Notably, a series of schlieren photographs displaying Mach waves in the supersonic flow of the...
conference paper 2021
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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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Bahamonde, Juan S. (author), Pini, M. (author), de Servi, C.M. (author), Schiffmann, Jürg (author), Colonna, Piero (author)
By means of this corrigendum, the authors would like to include relevant information regarding the validation of the meanline turbine model employed in the original article. The improvement regarding the validation of the model was made possible thanks to the contribution of Prof. Jürg Schiffmann. The additional results documented here...
journal article 2019
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de Servi, C.M. (author), Burigana, M. (author), Pini, M. (author), Colonna, Piero (author)
The realization of commercial mini organic Rankine cycle (ORC) power systems (tens of kW of power output) is currently pursued by means of various research and development activities. The application driving most of the efforts is the waste heat recovery from long-haul truck engines. Obtaining an efficient mini radial inflow turbine, arguably...
journal article 2019
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Lampe, M.H.F. (author), de Servi, C.M. (author), Schilling, Johannes (author), Bardow, Andre (author), Colonna, Piero (author)
The conventional design of organic Rankine cycle (ORC) power systems starts with the selection of the working fluid and the subsequent optimization of the corresponding thermodynamic cycle. More recently, systematic methods have been proposed integrating the selection of the working fluid into the optimization of the thermodynamic cycle....
journal article 2019
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De Servi, C.M. (author), Azzini, L. (author), Pini, M. (author), Colonna, Piero (author)
This preliminary study considers a combined cycle configu­ration for aeroengines, whereby thermal energy from the exhaust of the gas turbine is partly recovered in order to obtain additional mechanical power. The waste heat recovery system is based on a closed thermodynamic bottoming cycle with supercritical car­ bon dioxide (scCO2) as working...
conference paper 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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Pini, M. (author), de Servi, C.M. (author), Burigana, M. (author), Bahamonde, Juan S. (author), Rubino, A. (author), Vitale, S. (author), Colonna, Piero (author)
High temperature Organic Rankine Cycles power systems of low power capacity, i.e. 3-50 kW<sub>e</sub>, are receiving recognition for distributed and mobile energy generation applications. For this type of power plants, it is customary to adopt a radial-turbine as prime mover, essentially for their ability to cope with very large volumetric...
conference paper 2017
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Head, A.J. (author), De Servi, C.M. (author), Casati, E.I.M. (author), Colonna di Paliano, P. (author)
report 2015
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