Energy and Economic Assessment of Household Space Heating by Heat Pumps in Bariloche, Montevideo and Santiago
Evaluación Energética y Económica de Calefacción de Hogares por Bomba de Calor en Bariloche, Montevideo y Santiago
Abstract
Climate change forces to improve the efficiency of energy consumption. This work develops a methodology for energy and economic assessment related to replacing a standard household heating system fueled by natural gas, LPG, or conventional electric heaters, with a modern heat pump (inverter). As its efficiency is related to the temperature difference between the outdoor and indoor environments, the efficiency varies depending on the location of the city. Thus, the performance is studied in Bariloche, Santiago de Chile, and Montevideo (Average annual temperature of 8.3, 14.6 and 16.3 °C, respectively), using the following systems: 1) air-air, installing several Split devices; and 2) air-water, installing a heat pump that provides heating by water radiators. This methodology allows sizing these systems and calculating annual savings, exemplified for a 50 m2 social housing. In all the cases studied, moderate to notable reductions in consumption and savings were achieved (and investment payback periods of less than two years), except for natural gas in Bariloche and Montevideo. It is also discussed how their moderated investment can be an affordable first solution, as opposed to the expensive thermal rehabilitation, for obtaining more sustainable housing.
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