Browsing by Author "Perez, Rodrigo"

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    Feasibility study of the application of a cooling energy storage system in a chiller plant of an office building located in Santiago, Chile
    (2019) Venegas-Troncoso, Tomas; Ugarte-Larraguibel, Gaspar; Vasco, Diego A.; Rouault, Fabien; Perez, Rodrigo
    Energy consumption of commercial buildings has increasingly gained attention worldwide, because of its significant electricity consumption and peak power demand. Chiller plants are mostly used in commercial buildings to generate cold water for air conditioning. However, because the chiller plants and the refrigeration systems tend to be oversized with respect to their critical design load conditions, they certainly lead to higher energy consumption than a properly sized chiller plant. One possible way to reduce the power consumption and redistribute energy use is through the integration of latent heat thermal energy storage (LHTES) systems with air-cooling system in buildings. In the present work, a LHTES system based on ice is implemented along with a conventional chiller system of an existing commercial building located in Santiago, Chile. Different strategies of operation in a design day are assessed by computational simulation with EnergyPlus. A hybrid operation strategy is evaluated for the hottest summer week, and the results of the cooling loads are obtained. Finally, we founded that the implementation of a LHTES reduces by 7.8% the cooling energy consumption of the cooling system during the analyzed period. (C) 2019 Elsevier Ltd and IIR. All rights reserved.
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    The distance to market effect on rural poverty in the Metropolitan Region of Santiago
    (PONTIFICIA UNIV CATOLICA CHILE, INST ESTUDIOS URBANOS TERRITORIALES, 2013) Perez, Rodrigo; Salazar, Alejandro; Foster, William; Osses, Pablo
    The national poverty headcount in Chile has declined considerably since 1990. In 2006, rural poverty rate fell below that of urban areas, due in part to population mobility. Rural areas, however, are still characterized by low educational levels and incomes, explained, in part, by low population density, remoteness to services, and limited access to markets for rural-produced products. This study finds that distance (measured as travel time) of rural populations to urban areas is associated with the incidence of poverty in rural communities after controlling for other factors. Using an econometric model based on geographical and socioeconomic information of the Metropolitan Region of Santiago, the study finds that poverty levels in census tracts increase with distance to Santiago, and, for a given distance, access to transportation reduces poverty, through a mitigation of the distance effect.