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Nowadays, much attention is payed to the development of renewable energy resources. Wind energy plays a major role in this issue. That is why there is a growing interest for improving the design process of wind turbines at many aspects. This study compares two types of offshore wind turbines structures, the monopile and the jacket structure, in their dependency on wave load characteristics’ variations. The examined wave characteristics are significant wave height and wave peak period. The jacket structure showed lower influence of increase of wave height to stresses in the cross section at the bottom of the structure compared to the monopile structure. The monopile structure showed slight dependency of stresses on increasing wave frequency, while the jacket structure showed nearly no dependency, due to its more complex geometry and higher stiffness.

This work deals with an integrated solar PV/T hybrid air collector suitable for applications such as heating and drying of hay and industrial products. The main purpose of this study is to evaluate and optimize the thermal and electrical performances of this PV component and its integration system. A 2D mathematical model describing the thermal behaviour of the component is presented. The simulation values are compared to the measured data obtained under steady conditions on a solar PV/T air collector. Then, a description is provided regarding the in situ experimental studies which are carried out on three various models of the same component, in order to validate the thermal model previously developed. As further steps, various simulations will be performed on a drying system under a full building integration setup. 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 5150-5152

This paper presents a research work carried out under the umbrella of the CASCADE project, which is a European FP7 research project which is developing facility-specific measurement-based energy action plans for the airport energy managers that are underpinned by Fault Detection Diagnosis (FDD). The paper first describes the context of the project then it focuses on Building Management Systems describing the current status of the technology and presenting an outlook on their future development. Then a Strengths Weakness Opportunity and Treads (SWOT) framework is defined with the aim of verifying the suitability of an installed BMS system to incorporate Fault Detection and Diagnosis (FDD) tools

In order to develop the technology of carbon dioxide at so-called supercritical state (sCO2) further, quick and reliable design tools for the different system components, e.g. centrifugal compressors, are required. In this study, a computer program is developed to predict the performance of centrifugal compressors with sCO2 as working fluid. This computer program is based on mean-line analysis, calculates the fluid parameters at selected sections of the meridional plane and plots the performance maps. So-called enthalpy loss coefficients are utilized to describe the difference between the isentropic and the polytropic process. In addition to previous studies, the presented model intends to predict the performance of sCO2 centrifugal compressor with a shrouded impeller and a vaneless diffuser. For this purpose, corresponding loss coefficients are incorporated. Subsequently, the predicted results of this work are compared and validated with computational fluid dynamics (CFD) and experimental results from the EU-project sCO2-HeRo. The prediction of the computer program fits within 5% deviation to the CFD results, and about 4% to the experimental results regarding to pressure ratio. Conference Proceedings of the European sCO2 Conference4th European sCO2 Conference for Energy Systems: March 23-24, 2021, Online Conference, p. 68

The detailed study of corrosion behaviour of carbon steel in 1M hydrochloric acid solution in the presence and absence of (E)-4-((4-methoxybenzylidene) amino)-3-methyl-1H-1,2,4-triazole-5(4H)-thione (3-Tz) was investigated using weight loss method at various temperatures from 303 to 333 K. The inhibitor showed 92.15% inhibition efficiency at its optimum concentration 5 x 10-2M at 303K and decreased at higher temperatures. The various parameters of activation determining the kinetic data such as energy, enthalpy and entropy at different concentrations of the inhibitor were evaluated and discussed. The thermodynamic parameters such as, equilibrium constant, adsorption heat and adsorption entropy were obtained. The adsorptive behaviour of(3-Tz) followed Langmuir-type isotherm. The standard free energies of adsorption were negative at different temperatures tested, suggesting better inhibition performance. Applied Journal of Environmental Engineering Science, Vol 1, No 2 (2015)

A cause du faible montant des aides gouvernementales, 15% seulement des petits planteurs d'hévéas sont concernés par les programmes de développement de l'État indonésien alors qu'ils exploitent 84% des surfaces plantées. Pour ne pas perdre ses avantages sur le marché international, l'industrie du caoutchouc indonésienne (GAPKINDO) s'est associée à l'ICRAF (International Center for Research in Agroforestry) pour développer un système agroforestier à base d'hévéa (RAS) chez les petits propriétaires afin d'augmenter leur revenu tout en préservant l'environnement. Ce système, pratiqué traditionnellement et proche d'une forêt secondaire, s'est révélé écologiquement intéressant car il réduit l'érosion des sols et a une action positive sur la biodiversité. Des projets pilotes de plantations de clones améliorés d'hévéas intercalés avec d'autres plantes pérennes sont prévus pour début 1995 dans les provinces de West Kalimantan et de Jambi.

4th Banff Meeting on Structural Dynamics, Banff, Alberta, Canada, 15 Feb 2015 - 18 Feb 2015 ; (2015).

The Industry 4.0 Asset Administration Shell provides a standardized mechanism for collaboration between digital systems in the factory. Digital data within factories is typically stored in databases, we explore the requirements of providing an AAS as an interface to the data contained within the aforementioned databases. Based on these requirements, we describe and discuss a proof-of-concept implementation where an AAS is used to publish data stored in a relational database.