Sylvain Serra

Sylvain Serra
Université de Pau et des Pays de l'Adour | UPPA · Department of Energy

Associate Professor (Ph. D.)

About

35
Publications
2,920
Reads
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280
Citations
Introduction
Sylvain Serra currently works at the Department of Energy (LaTEP), Université de Pau et des Pays de l'Adour. Sylvain does research in conversion, transport and storage of thermal energy, Computer Engineering and renewable energies. His research topic is about optimization of energetic systems and mainly on district networks, solar thermal plants and multi-energy networks.

Publications

Publications (35)
Conference Paper
Thermal energy storage (TES) is a key issue in efficient energy systems applications. In this regard, phase-changing material (PCM) has been of interest as an active solution for efficient energy management, especially in the context of the building. This paper presents a thermal analysis on sensible and latent TES systems to investigate their ther...
Article
Full-text available
This review provides a deep analysis of the different methodologies to improve the operation of solar thermal plants based on mathematical optimization. The various schemes found in the literature to determine the optimal operational strategy are classified depending on two criteria: time dependence (static or dynamic) and with feedback or not from...
Conference Paper
In this work, an economic Dynamic Real-Time Optimization (DRTO) of the operation of a solar thermal plant is conducted. A planning phase is used to improve the use of storage, and a storage state target is included in the objective function of the DRTO. The weight of this term in the objective function is adjusted. The trajectories for the flow rat...
Chapter
In this work, an economic Dynamic Real-Time Optimization (DRTO) of the operation of a solar thermal plant is conducted. A planning phase is used to improve the use of storage, and a storage state target is included in the objective function of the DRTO. The weight of this term in the objective function is adjusted. The trajectories for the flow rat...
Article
Full-text available
The aim of the ISORC/OPTIMISER project is to increase and improve the use of solar thermal energy in district heating networks. One of the main tasks of the project is to develop an optimization tool for the sizing and operation of a solar district heating network. This is the first optimization tool using an open-source interface (Julia, JuMP) and...
Article
Full-text available
An open system based on physical adsorption phenomena with humid air and zeolite 13X is herein discussed for residential heat storage purposes. A model has been developed to describe the conservation of mass and heat in the system. A simplified approach of a complete model describing both mass conservation in the macroporous and microporous domains...
Conference Paper
In the present paper, we first developed and implemented the exergy analysis within an Integrated Asset Modeling (IAM) platform to evaluate the overall energy efficiency and Greenhouse Gas (GHG) emissions of a future offshore oil production system. The use of the same state function enables a direct comparison of the different irreversibilities tha...
Article
This paper presents the simultaneous optimization of the design and operation in nominal conditions of a geothermal plant where the geothermal fluid is split into two streams to feed an Organic Rankine Cycle (ORC) and a District Heating Network (DHN). The topology of the DHN is also investigated. A Mixed Integer Non-Linear Programming (MINLP) optim...
Conference Paper
ISORC/OPTIMISER project aims to increase and improve the use of solar thermal energy for District Heating Networks. One of the main tasks of the project is to develop an “open-access” optimization tool for the sizing and operation of a Solar District Heating Networks (SDH). This tool is developed with the Julia programming language whose package, J...
Article
France is behind its objectives regarding the development of solar thermal energy. The company NEWHEAT has the objective to help reducing this gap by designing, financing, building and operating solar thermal plants which provide solar heat to large consumers: industrial processes and district heating networks. The present work focuses on the optim...
Article
Due to the increasing demand for cooling worldwide and the need for reliable and energy-efficient alternatives to provide it, the analysis of district cooling (DC) networks has become a focus of interest in recent years. In DC networks, the temperature of the cooling utility returning to the production site must be close to the design temperature o...
Article
Full-text available
Laminarization of a turbulent flow due to wall heating has been known for more than 50 years, to the point that it is sometimes used as means of reducing friction. However this phenomenon has been mainly studied for cylindrical pipes and with imposed heat flux but not for channel flows and with imposed temperature boundary conditions, especially wi...
Chapter
This paper presents a new methodology to improve the conception of petroleum production systems by incorporating environmental perspectives, in addition to energy and economic aspects, over their entire life-cycle. We first proposed generic oil production system configurations that include the most common technologies. In this work, two objective f...
Article
Full-text available
This paper presents the optimization of parallel distribution between electricity and heat production for a geothermal plant. The geothermal fluid is split into two streams, one used for an Organic Rankine Cycle (ORC) system, and the other for a District Heating Network (DHN). The superstructure to be used for the optimization problem includes the...
Article
This contribution presents the optimization of parallel distribution between electricity and heat production for a geothermal plant. The geothermal fluid is split into two streams, one used for an Organic Rankine Cycle (ORC) system, and the other for a District Heating Network (DHN). The superstructure to be used for the optimization problem includ...
Article
Full-text available
The effects of a strong transverse temperature gradient on a turbulent Poiseuille flow are studied numerically using Reynolds-averaged Navier–Stokes (RANS) models. Such a situation is very common for numerous industrial applications. Since a large majority of industrial computations are based on the RANS approach, the aim of the present work is to...
Article
In this paper a general model for the steady state simulation of a solar absorption chiller is proposed. The novelty of this model is to calculate the physical state of all the streams rather than fix them (especially at the outlet of the condenser and evaporator). The thermodynamic properties of the mixture can be calculated by suitable predictive...
Conference Paper
This study deals with the heat transfers calculations between the internal walls of a duct and a non-isothermal turbulent flow inside this later on. The departure point for this work is the appearance of an asymmetry in the velocity fiels, implying consequently a modification of the temperature profiles [1, 2]. Therefore, the fluid properties can b...
Article
Full-text available
The aim of this work is to propose a tool to help the design of district heating networks (DHN). The configuration (network layout and production technologies) and the design (mass flow rate, temperature, heat capacity to install and area of the heat exchanger) are optimized simultaneously.
Article
Full-text available
This contribution presents the economical optimization of the parallel repartition between electric and heat production for geothermal application. The 350 m³/h flow of geothermal fluid, assimilated to liquid water at 185°C, is then separated in two streams. Its reinjection temperature is fixed at 70°C. An Organic Rankine Cycle (ORC) system is used...
Article
The aim of this work is to propose a tool for the design assistance of District Heating Network (DHN). Two goals of DHN optimization are handled simultaneously: the optimization of the configuration and its design. The optimization objective is to minimize the global cost of the DHN over 30 years. It includes both operating costs (heating and pumpi...
Conference Paper
Full-text available
The aim of this work is to propose a tool for the design assistance of District Heating Network (DHN) at the beginning of an urban project, as well as for an extension of an existing network. Two goals of DHN optimization are handling at the same time: the optimization of the configuration (network layout, choice between the different production te...
Article
Unresolved fluxes in turbulent diffusion flames are investigated by introducing the specific volume to analyze the effects of density variations. Unresolved fluxes are found to be related to scalar correlations involving this specific quantity. The algebraic models proposed for the turbulent scalar and momentum fluxes allow to recover and generaliz...
Article
In this Letter, we find that the Kolmogorov scaling law is no longer valid when the flow is submitted to strong dilatational effects caused by high temperature gradients. As a result, in addition to the nonlinear time scale, there is a much shorter “temperature gradients” time scale. We propose a model that estimates the time scale of the triple de...
Article
This paper studied nonisothermal plane channel flows using themethod of thermal largeeddy simulations (TLES). Several temperature ratios (TR = TH/TC) were investigated, where TC and TH are the temperatures of the cold and hot sides, respectively. Each TR case is further considered for two wall Reynolds numbers (Reτm), 180 and 395, where the wall Re...
Article
Full-text available
Thermal large eddy simulations are carried out in order to study the convective flow in a solar receiver. We investigate the impact of thermal gradients on a turbulent channel flow with imposed wall temperatures for two turbulent Reynolds numbers based on the friction velocity (180 and 395). In this configuration, the flow is subsonic, while temper...
Thesis
Full-text available
The aim of this work is to analyse the flow in the high temperature solar receiver of the central tower power plant PEGASE. The flow is turbulent and submitted to a very high temperature gradient. We use the Thermal Large Eddy Simulation applied to the lowMach number equations in order to work on the turbulent flow in geometry of a biperiodic plane ch...

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Projects

Projects (4)
Project
MCPBAT aims to develop a Bio-based modular compact thermal energy storage (TES) for Solar and HVAC applications (Hot water, heating and cooling). Due to its compactness and thermal performance, this system is expected to allow better use of thermal energy in building while reducing the space occupied.