Technological Educational Institute of Western Macedonia

About: Technological Educational Institute of Western Macedonia is a based out in . It is known for research contribution in the topics: Catalysis & Symplectic geometry. The organization has 291 authors who have published 522 publications receiving 7682 citations. The organization is also known as: TEI of West Macedonia & TEI of Western Macedonia.

Economic Assessment of Lithium-Ion Battery Storage Systems in the Nearly Zero Energy Building Environment

Abstract: Scope of this paper is to deliver a complete techno-economic model for the economic assessment of lithium-ion battery energy storage systems in the framework of the nearly zero energy buildings (NZEB) The proposed model simulates the combined operation of photovoltaics, solar thermal generators, heat pump generators, electrical and thermal storage devices in order to represent efficiently the typical characteristics of NZEBs The model takes into account the thermal and electrical needs of the building, typical electricity prices, household electrical consumption profiles, weather data and typical costs for lithium battery energy storage systems Using these inputs, an optimization procedure is applied and the optimal size, in terms of net present value, for the lithium-ion battery energy storage system is derived

Valorization of Mill Scale Waste by its Incorporation in Fired Clay Bricks

Abstract: The mill scale (MS) waste is produced in steel industry during the milling process from the rapid oxidization of the hot iron products, and is mainly consisted of iron oxides (>95%). The aim of this work is to evaluate the utilization of MS (known in Greece as “kalamina”) as an admixture in clay bricks manufacturing by applying extrusion and sintering processes. For that purpose, specimens were formed from various clay/MS mixtures (up to 9 wt% MS) and then fired at different temperatures (up to 1100°C). Shrinkage and weight loss upon firing as well as density, porosity, bending strength and thermal conductivity of sintered specimens were determined and studied as a function of the % MS content and the firing temperature for optimization. The experimental results show that the incorporation of MS in clay bricks production is feasible, as an efficient secondary resource, thus turning waste from one industry into useful feedstock for another one. Specifically, the mechanical performance and thermal conductivity are not significantly affected with increasing the mineral admixture percentage and the sintering temperature.

A Survey on Medium Access Control Schemes for 5G Vehicular Cloud Computing Systems

Abstract: Fifth generation (5G) vehicular systems support multiple services with strict Quality of Service (QoS) constraints. To fulfill the increased communication needs, 5G Vehicular Cloud Computing (5G-VCC) architectures with dense deployments of the access network infrastructures have been proposed. In such systems, the network resources manipulation is a critical task that could be addressed by the Medium Access Control (MAC) layer. MAC schemes that have been proposed for vehicular networks, can be applied to 5G-VCC systems in order optimal manipulation of communication resources to be accomplished. This paper makes an overview of available MAC schemes, while a comprehensive discussion about their implementation in 5GVCC systems is performed leading to useful conclusions.

Load signatures enhancement via odd-order harmonic currents

Abstract: This paper examines the contribution of the Odd-Order Harmonic Currents to the development of robust and distinct Load Signatures that could, in turn, facilitate load identification in Non-Intrusive Load Monitoring (NILM) algorithms. The analysis is based on field measurements in various residences with single-phase grid connections. Measurements have been conducted both for stand-alone operation of each appliance and for various combination scenarios. The former enables the determination of the active and reactive power consumption, the instantaneous current values, and the magnitude of odd-order harmonic current under steady state operation, for realistic operating conditions regarding the operational time of each appliance. The latter, allows considering candidate aggregated signals for decomposition. The results indicate that the utilization of more distinct and enhanced Load Signatures, using odd-order harmonic currents, improves the efficiency of the identification procedure.