MDPI » Inventions
520 FOLLOWERS
The journal Inventions is an international, peer-reviewed journal that publishes original scientific research of significance concerning innovation/invention, or patent-based/extended/reviewed research papers in all fields of science, engineering, and product development processes. Also covered would be research concerning improvements of machines or products; new processes for creating an..
MDPI » Inventions
1d ago
Inventions, Vol. 9, Pages 46: Experimental Research on an Afterburner System Fueled with Hydrogen–Methane Mixtures
Inventions doi: 10.3390/inventions9030046
Authors: Florin Gabriel Florean Andreea Mangra Marius Enache Marius Deaconu Razvan Ciobanu Razvan Carlanescu
A new afterburner installation is proposed, fueled with pure hydrogen (100%H2) or hydrogen–methane mixtures (60% H2 + 40% CH4, 80% H2 + 20% CH4) for use in cogeneration applications. Two prototypes (P1 and P2) with the same expansion angle (45 degrees) were developed and tested. P1 was manufactured by the cla ..read more
MDPI » Inventions
6d ago
Inventions, Vol. 9, Pages 45: A Novel Hybrid Ultrasound Abrasive-Driven Electrochemical Surface Finishing Technique for Additively Manufactured Ti6Al4V Parts
Inventions doi: 10.3390/inventions9020045
Authors: Manyou Sun Ehsan Toyserkani
Poor surface quality is one of the drawbacks of metal parts made by additive manufacturing (AM)—they normally possess relatively high surface roughness and different types of surface irregularities. Post-processing operations are usually needed to reduce the surface roughness to have ready-to-use parts. Among all the surface treatment techniques ..read more
MDPI » Inventions
1w ago
Inventions, Vol. 9, Pages 44: A Modified Reduced-Order Generalized Integrator–Frequency-Locked Loop-Based Sensorless Vector Control Scheme Including the Maximum Power Point Tracking Algorithm for Grid-Connected Squirrel-Cage Induction Generator Wind Turbine Systems
Inventions doi: 10.3390/inventions9020044
Authors: Tuynh Van Pham Anh Tan Nguyen
In this paper, an improved speed sensorless control method including the maximum power point tracking (MPPT) algorithm for grid-connected squirrel-cage induction generator (SCIG) wind turbine systems using modified reduced-order generalized in ..read more
MDPI » Inventions
1w ago
Inventions, Vol. 9, Pages 43: From Sensing Technology towards Digital Twin in Applications
Inventions doi: 10.3390/inventions9020043
Authors: Jianxiong Zhu Bairong Sun Luyu Jia Haibing Hu
Sensing technology drives innovation in digital technology, especially in data acquisition ..read more
MDPI » Inventions
1w ago
Inventions, Vol. 9, Pages 42: Enhanced Heat Transfer in Thermoelectric Generator Heat Exchanger for Sustainable Cold Chain Logistics: Entropy and Exergy Analysis
Inventions doi: 10.3390/inventions9020042
Authors: Yunchi Fu Yanzhe Li
This study investigates the application of thermoelectric power generation devices in conjunction with cold chain logistics transport vehicles, focusing on their efficiency and performance. Our experimental results highlight the impact of thermoelectric module characteristics, such as thermal conductivity and the filling thickness of copper foam, on the energy util ..read more
MDPI » Inventions
1w ago
Inventions, Vol. 9, Pages 40: Design, Construction and Programming of a Low-Cost Pulsed High-Voltage Direct Current Power Supply for the Electrophoretic Deposition of Silicon Carbide Mixed with Graphite and/or Alumina for Thermoelectric Applications
Inventions doi: 10.3390/inventions9020040
Authors: Juan Jesús Reyes Valdez Edna Carina De la Cruz Terrazas Eugenio Rodríguez González
This document describes a proprietary design, construction, programming and testing of a low-cost pulsed high-voltage direct current (HVDC) power supply with an output of 430 V and power of 25 W. The design obtained ..read more
MDPI » Inventions
1w ago
Inventions, Vol. 9, Pages 41: The Expected Dynamics for the Extreme Wind and Wave Conditions at the Mouths of the Danube River in Connection with the Navigation Hazards
Inventions doi: 10.3390/inventions9020041
Authors: Alina Beatrice Răileanu Liliana Rusu Andra Marcu Eugen Rusu
The entrance in the Sulina channel in the Black Sea is the target area of this study. This represents the southern gate of the seventh Pan-European transport corridor, and it is usually subjected to high navigation traffic. The main objective of the work is to provide a more comprehensive picture concerning the past an ..read more
MDPI » Inventions
2w ago
Inventions, Vol. 9, Pages 39: Innovative Hybrid UAV Design, Development, and Manufacture for Forest Preservation and Acoustic Surveillance
Inventions doi: 10.3390/inventions9020039
Authors: Gabriel Petre Badea Tiberius Florian Frigioescu Madalin Dombrovschi Grigore Cican Marius Dima Victoras Anghel Daniel Eugeniu Crunteanu
The research described in this paper focuses on the development of an innovative unmanned aerial vehicle (UAV) tailored for a specific mission: detecting the acoustic signature emitted by chainsaws, identifying deforestation, and reporting its location for legality assessmen ..read more
MDPI » Inventions
2w ago
Inventions, Vol. 9, Pages 38: The Basic k-ϵ Model and a New Model Based on General Statistical Descriptions of Anisotropic Inhomogeneous Turbulence Compared with DNS of Channel Flow at High Reynolds Number
Inventions doi: 10.3390/inventions9020038
Authors: J. J. H. Brouwers
Predictions are presented of mean values of statistical variables of large-scale turbulent flow of the widely used basic k-ϵ model, and of a new model, which is based on general statistical descriptions of turbulence. The predictions are verified against published results of direct numerical simulati ..read more
MDPI » Inventions
1M ago
Inventions, Vol. 9, Pages 37: Modeling and Experimental Validation of Broad Input-Output Range Three-Voltage-Level Rectifier
Inventions doi: 10.3390/inventions9020037
Authors: Yarden Oren Eliav Dahan Aaron Shmaryahu Yishai Kellerman Moshe Sitbon Shlomo Yaakov Gadelovits Dmitry Baimel Ilan Aharon
A new type of single–conversion–step wide–input–range versatile step–up/down three–voltage–level power–factor correction stage is presented in this manuscript. The rectifier can operate both ..read more