An experimental analysis of the Trombe wall temperature fluctuations for high range climate conditions: Influence of ventilation openings and shading devices

Abstract

a b s t r a c tDespite the studies already developed about Trombe walls, more research work is needed to contribute to the knowledge about their behaviour and optimize it according to the specific characteristics of each climatic region. The ventilation openings and the shading device operation decisively influence the temperatures fluctuation along the system and that impact should be discussed.In this context, a test cell with a classical Trombe wall was submitted to real climatic conditions in a Portuguese city. The effect of ventilation openings and shading devices in the temperatures fluctuation was analysed.The temperatures in the air layer and along the massive wall presented a similar oscillation pattern and exceeded 60 • C without ventilation and shading devices. For this configuration, temperature values at the top of the air layer were always higher than those obtained at the base and a differential of 19 • C was achieved.The temperature fluctuation across the massive wall was not proportional to its thickness due to its heat storage capacity. When the ventilation system was closed and the shading device was not activated, the temperature inside the test cell exceeded the outside temperature value in 9 • C, showing the system ability to store and release heat.

An analytical approach to assess the influence of the massive wall material, thickness and ventilation system on the Trombe wall thermal performance

“…The methodology described above was applied to a Trombe wall that integrates the envelope of a building located in a Portuguese city characterized by high thermal amplitudes during the day and along the year (Briga Sá et al, 2017). The constructive details of the studied Trombe wall system will be presented in the next section.…”

“…The ventilation system has a fundamental role in the Trombe wall system performance. Briga Sá et al (2017) developed research work about the classical Trombe wall thermal performance based on the experimental analysis of the system under real weather conditions. The influence of the ventilation system on the Trombe wall thermal performance was analysed, and the results showed that opening or closing the air vents decisively influences the air layer and the massive wall temperature fluctuation and consequently the temperature inside the room.…”

Experimental Evaluation of the Heat Balance of an Interactive Glass Wall in A Heating Season

“…However, they require highly specialized knowledge of numerical modelling, building physics and thermodynamics. In the evaluation of the thermal efficiency of prototypes the validation of numerical models is strongly supported by the data obtained from experimental tests performed on physical models in natural [26] or laboratory conditions [27]. The evaluation of the thermal efficiency of the IGW presented in the paper was based on the analysis of the data obtained in the field tests on the IGW using a test chamber of controlled indoor temperature.…”

Energy Efficiency of a Solar Wall with Transparent Insulation in Polish Climatic Conditions

“…One of them is the fact that construction practices differ significantly from country to country, so building design strategies should take into account significant regional differences in climate patterns [17]. Therefore, despite the numerous studies already carried out on solar walls, more work needs to be done to gain knowledge about their behavior and to optimize them according to the specificity of each climate region [29].…”