Carlos Barreira Martinez's research while affiliated with Universidade Federal de Itajubá (UNIFEI) and other places
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Publications (23)
This work presents a proposal for the transformation of mining-degraded areas into renewable energy installations, converting deactivated mine pits, in the Quadrilátero Ferrífero (QF) region in state of Minas Gerais (MG), Brazil, into reservoirs for Pumped Storage Hydropower (PSH). Additionally, it proposes the alteration of adjacent areas impacted...
The dam safety depends heavily on the organizational structure, the developer’s philosophy, and the involved actor’s technical responsibility. In this context, the present research aimed to: introduce the concept of Engineer of Record (EoR); discuss their influence on the continuous improvement of dam safety, propose a work plan for this profession...
The study of the interaction between hydraulic structures in mobile bed river systems is complex because it involves sediment transport and dynamic changes in the boundary conditions, requiring the use of physical models. This article presents the procedure for the design and construction of a physical model of the reservoir and dam of the Small Hy...
![Estimated potential of the Brazilian coast. Source: [9].](publication/370017100/figure/tbl1/AS:11431281146094866@1681484302466/Estimated-potential-of-the-Brazilian-coast-Source-9_Q320.jpg)
![Significant wave heights and peak wave periods. Adapted from: [65].](publication/370017100/figure/tbl2/AS:11431281146103094@1681484302761/Significant-wave-heights-and-peak-wave-periods-Adapted-from-65_Q320.jpg)
Seas and oceans offer great potential as a widely available source of clean and renewable energy near high energy consumption centers. This source of energy is a valuable option in the energy transition and in energy matrix decarbonization. Wave energy and an oscillating water column (OWC) device stand out as the types of ocean energy with the most...
Pumping systems, especially those used in the water supply sector and in industrial and hydroelectric facilities, are commonly infested by the golden mussel. This causes an increase in maintenance operations (e.g., system shutdowns for cleaning) that can generate an increased energy cost. The geographical expansion of the golden mussel in Latin Ame...
O planejamento energético objetiva sobretudo assegurar a oferta e o acesso à energia. Porém, atualmente, essa energia deve ser de fonte limpa e renovável, estando de acordo com as premissas de preservação ambiental e transição energética, visando uma matriz descarbonizada que contribua efetivamente com a minimização dos efeitos da mudança climática...
O Brasil ocupa a segunda colocação em termos de capacidade instalada hidrelétrica, somente atrás da China. Isso deve-se ao fato de que o país ter buscado, ao longo dos anos, a construção de grandes usinas hidrelétricas devido à disponibilidade de potenciais ao longo de seu território, incluindo a região Amazônica, onde se encontram instaladas duas...
Several studies have already been conducted using residues to substitute or be added to Self- Compacting Concrete (SCC), including Waste Foundry Sand (WFS), yet there are still failures when using Waste Foundry Exhaust Sand (WFES), with respect to the potential for concrete corrosion. This study assesses using WFES as a partial substitute (10%, 20%...
The reuse of waste in civil construction brings environmental and economic benefits. However, for these to be used in concrete, it is necessary a previous evaluation of their physical and chemical characteristics. Thus, this study aimed to characterize and analyze the waste foundry exhaust sand (WFES) for use in self-compacting concrete (SCC). Foun...
The Order Concerns a Golden Mussel Testing Chamber which can be used for promising experiments to control the effect of ultraviolet radiation (UV) for the inactivation of larvae and eggs of the clam Limnoperna Fortunei (Golden mussel) or any other living organism which is intended to allow experiments are carried out on the supply of UV radiation t...
The present invention patent application is intended for a hydromechanical equipment entitled expansion chamber for air concentration and purges operating under low
traffic speed and for that reason promotes the concentration of all the air contained in the flow in its upper portion, which may be coupling to air expulsion and conventional suction c...
The present invention patent application is intended for accessory equipment that can be attached to the outlet located on the top of the air purgers or suction cups, which may
be used for domestic, industrial, commercial, and public services or in water distribution networks without compromising structural integrity or interfering with the functio...
Citations
... where EF corresponds to the emission factor, defined as 532 equivalent grams of CO 2 per kWh (gCO 2 eq./kWh) in case of natural gas combined cycle power plant, and 762 gCO 2 eq./kWh for an oil fired plant [44], [45]. The term P ef f. indicates the power of each renewable energy, wherein the P wind is multiplied by an device efficiency of 50% [46], whereas a 49% represents an average of the efficiency between different WECs [47]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/637070301200384-1528900804261_Q64/Adriano-Bastos.jpg)
... For instance, some researchers analyzed the losses in distribution transformers under varying operating conditions, such as load and ambient temperature. The study identified that the losses were mainly due to core loss and copper loss (Bastos et al ,2022). Similarly, some also analyzed the losses in power cables, considering factors such as cable length, insulation thickness, and frequency. ...
... To overcome these problems, Professor Okamura from Japan developed the concept of SCC during the late 1980s, which flows freely and gets compacted by its self-weight [13]. SCC can resist segregation and deformation, which maintains the homogeneity of the concrete mix [14,15]. It also exhibits the properties of fluidity (flowability), passing and filling ability without segregation or bleeding, which are the main characteristics of workability [16,17]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/277599826792448-1443196364218_Q64/Regina-Barros.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/1002784967114753-1616093975373_Q64/Lucas-Roque-Silva.jpg)
... In the past few years, the utilization of waste foundry sand in concrete mixtures has been on the rise due to its environmental and economic benefits [11,12]. Numerous studies [13,14] have been carried out on the impact of WFS on concrete's durability and strength. The various industrial practices that contribute to the creation of each waste type are responsible for its source. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/1119767880568836-1643984875986_Q64/Maria_Martins110.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/1086111493427201-1635960567112_Q64/Maria-Gabriela-Ranieri.jpg)
