Evaluación de la eficiencia de un colector solar con tubos al vacío para el precalentamiento de agua para la cocción de alimentos

Abstract

In order to contribute with a viable alternative for reducing the consumption of domestic gas (LPG) in cooking food, it is proposed to develop this research on the use of low temperature solar thermal energy, below 100 ° C, for preheating the water. The boiling time of this fluid can be reduced by entering the domestic hot water (DHW) at a temperature of 33.20 ° C into the cooking container. This is achieved by means of a solar water heater with vacuum tubes (CSATV) that has a thermal efficiency of 68% in unfavorable weather conditions that occur in the winter months where a saving in gas consumption of 50% can be obtained. until reaching the boiling temperature of the preheated water. On the other hand, it is necessary to indicate that liquefied petroleum gas is a deficit fuel, polluting and has a state subsidy, so it is necessary to reduce its consumption both in gas boilers and in cooking food. These new possibilities of taking advantage of solar energy, will allow the improvement of the quality of life of the population, saving foreign currency by reducing the import volumes of this fuel and environmental conservation for the benefit of present and future generations, especially of the marginal rural sector.