COCINA SOLAR INDIRECTA CON ACUMULACIÓN TÉRMICA INTEGRADA A VIVIENDAS

N. DI LALLA, A. DÍAZ, A. HERNANDEZ

AVANCES EN ENERGIAS RENOVABLES Y MEDIO AMBIENTE

ASOCIACIÓN ARGENTINA DE ENERGÍA SOLAR

Lugar: Salta; Año: 2022

0329-5184

The thermal characterization of a building-integrated indirect solar cooker prototype by sensible heat thermal accumulation system, is presented. We have designed and manufactured a device with 0.8 m2 solar aperture area, that operates with a two-liter pot. The reflector is of CPC type and works in conjunction with two selective evacuated tubes with their respective heat pipes. These tubes transmit the absorbed heat to a thermal accumulator system made up of vegetable oil, in which the cooking pot is located. The ratio between the volume of oil in the accumulator and the solar aperture area of the prototype is 6.25 liters/m2. This dimensioning was evaluated by means of thermal tests in different environmental conditions, verifying if it allows: baking and frying, and also to continue cooking in case of a total sudden cloud cover. The prototype showed a very good use of the collected energy, since, despite its relatively small collection area, the heat storage system, during a winter day, reached a maximum temperature of 220°C. In addition, at noon, two liters of water in the pot reached boiling point in 20 minutes. The water in the pot kept boiling for more than 50 minutes during off-sunshine.