Alexander Vallejo-Díaz

Alexander Vallejo-Díaz


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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11 May 2024 in Renewable and Sustainable Energy Reviews
Verified
Journal Article
Closed access
AVAlexander Vallejo-Díaz
Alexander Vallejo-Díaz
Idalberto Herrera MoyaIdalberto Herrera Moya
Idalberto Herrera Moya

14 February 2023 in Energy for Sustainable Development
Verified
Journal Article
Open access
AVAlexander Vallejo-Díaz
Alexander Vallejo-Díaz
IMIdalberto Herrera Moya
Idalberto Herrera Moya
CMCarlos Pereyra Mariñez
Carlos Pereyra Mariñez
ELEdwin Garabitos Lara
Edwin Garabitos Lara
CVCándida Casilla Victorino
Cándida Casilla Victorino

6 February 2024 in Sustainability
Verified
Journal Article
Open access
PDF file
AVAlexander Vallejo-Díaz
Alexander Vallejo-Díaz
Idalberto Herrera MoyaIdalberto Herrera Moya
Idalberto Herrera Moya
ELEdwin Garabitos Lara
Edwin Garabitos Lara
CVCándida Casilla Victorino
Cándida Casilla Victorino
Urban wind energy has emerged as an attractive source of distributed generation in cities to achieve sustainable development goals. The advancement in technologies for the use of urban wind energy has offered an alternative for the decarbonization of cities and the energy transition. The objectives of this work are (1) to identify the potential of wind energy through numerical weather prediction (NWP) data tools and (2) to identify the roles and responsibilities of the stakeholders involved in the decision-making process. A methodology was developed in two phases and applied to a case study in the Dominican Republic. The first phase consisted of estimating the wind energy potential for the 32 provinces at a height of 10 m using open access NWP tools provided by NASA. In the second phase, 28 stakeholders were identified through snowball sampling. The Responsible, Accountable, Consulted, and Informed (RACI) matrix tool was applied to identify the roles of the 28 institutions addressed at the country level as relevant in the decision-making process for the energy sector. The annual average wind speed and energy potential for each province were determined. It was found that 24 provinces have poor potentials, below <4.5 m/s. In the northwest and east is where there is the greatest potential, between 4.83 and 6.63 m/s. The population density was established, and it was observed that the provinces with greater potential are less densely populated. Through 59 interviews, 28 institutions were identified and evaluated due to their relevance in decision making for the implementation of energy projects. According to the RACI matrix, the Ministry of Energy and Mines has been categorized as “A”, electricity distribution companies as “R”, energy associations and universities as “C”, and educational and justice institutions as “I”.


31 October 2023 in Data in Brief
Verified
Journal Article
Open access
ELEdwin Garabitos Lara
Edwin Garabitos Lara
AVAlexander Vallejo-Díaz
Alexander Vallejo-Díaz
CARLOS Napoleon PEREYRACARLOS Napoleon PEREYRA
CARLOS Napoleon PEREYRA
This data article presents electricity demand data on common household appliances in the Dominican Republic and therefore in the Caribbean region, as well as appliances whose demand characteristics are maintained regardless of geographic location. A one-hour record is made in most cases, for 17 household appliances, containing information on power demand, effective current, power factor and harmonic distortion of voltage and current. The average, minimum, and maximum values ​​of each parameter for one minute are provided. The data were obtained using the Fluke-1738 electrical network analyzer. The data can be used to build demand profiles in the residential or commercial sector, depending on the composition of electrical appliances and the hours of use, dimension photovoltaic systems for self-consumption and emergency electrical sources. Although the number of household appliances and conditions of use of some appliances do not constitute a representative sample, the dataset and the measurement method constitute a starting point for obtaining this type of records, which are scarce in the literature.

5 April 2022 in Energies
Verified
Journal Article
Open access
PDF file
CARLOS Napoleon PEREYRACARLOS Napoleon PEREYRA
CARLOS Napoleon PEREYRA
FGFelix Santos Garcia
Felix Santos Garcia
VOVíctor S Ocaña-Guevara
Víctor S Ocaña-Guevara
AVAlexander Vallejo-Díaz
Alexander Vallejo-Díaz
The fulfillment of the sustainable development goals of the United Nations (UN) in remote communities undoubtedly goes through the consequent development of the energy supply system (ESS). Structuring a procedure for modeling the ESS, according to development requirements, is vital for decision making. This publication reviews the main methods for designing local development programs that apply a sustainable livelihoods approach and a group of modeling tools for ESS. The necessary criteria are verified to structure a model that integrates the expectations of sustainable development, through the indicators of sustainable livelihoods (SLs), with the requirements of the ESS and the use of available renewable energy resources. In the review carried out, it is found that the methods of analysis and planning of sustainable local development are disconnected from the models for energy planning. On the other hand, the relationship of the indicators for calculating SLs with the characteristics and behavior of energy demand with respect to time is verified. The main criteria, parameters, and optimization methods necessary for the design and expansion of ESS in hard-to-reach areas are also discussed. Lastly, the necessary elements are proposed to be validated through a future study case for the dimensioning and expansion of ESS in hard-to-reach communities, integrating the analysis of development programs based on SLs.