A thermal evaluation of a R-TW system (room with a Trombe wall) is presented. Hourly climatic data of the coldest and the warmest days of 2014 was used to assess the behavior of the R-TW in two cities of Mexico with cold climate (Huitzilac and Toluca). The simulations were done with an in-house code based on the Finite Volume Method. It was found that thermal energy losses through the semitransparent wall are about 60% of the solar radiation incident on the system (Gsol). Despite of the thermal losses, the system gets enough energy to keep the air inside the room with a temperature above 35 °C. For both cities during the coldest day, the maximum energy stored is about 109 MJ and during the warmest day is about 70 MJ. This energy is supplied from the storage wall to the air inside the room during periods without insolation.
Bibliographical noteFunding Information:
I. Hernández-López acknowledges the support provided by the Consejo Nacional de Ciencia y Tecnología (CONACYT) (Grant number: 331583) given through its doctorate scholarship program. In addition, the authors are grateful to the Servicio Meteorológico Nacional-Comisión Nacional del Agua (SMN-CONAGUA) for providing the climatic data used for the CFD simulations in this work.
© 2016 Elsevier Ltd.
- CFD simulation
- Passive solar heating
- Thermal energy storage
- Trombe wall system