Instituto de Física

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Browsing Instituto de Física by Author "Edwin Garabitos"

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    Electrical dataset of household appliances in operation in an apartment
    (2023-12) Edwin Garabitos
    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.
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    Sizing of photovoltaic systems for self-consumption without surpluses through on –site measurements: Case study of the Dominican Republic
    (2024-12) Edwin Garabitos
    The photovoltaic systems with surpluses have contributed significantly to distributed generation in the last decade, however, its growth is affected by new regulations in several countries. With the aim of promoting self-consumption, this research evaluates the profitability of self-consumption without surpluses, considering self-consumption without an anti-dump system. The sizing methodology includes the use of geographic information systems tools, on-site measurements with an electrical network analyzer and irradiance meter, contributing with real data of the solar resource. A techno-economic model is applied to a case study in the residential sector of the Dominican Republic, with an average demand of 394 kWh/month, from which results are inferred for other levels of consumption. The results show that self-consumption without anti-dump is profitable, with payback time (PBT) of 4.57 years, internal rate of return (IRR) of 23.4 % and self-sufficiency rate (SSR) of 5.0 %. The deployment of this type of self-consumption is not viable for customers with consumption <252 kWh/month. In the case study with the anti-dump system the investment is profitable, with PBT of 4.84 years, IRR of 21.7 % and SSR of 20.8 %. These results indicate the profitability conditions for two types of self-consumption without surpluses, presenting an alternative to self-consumption with surpluses.