Ventilated Trombe wall as a passive solar heating and cooling retrofitting approach; a low-tech design for off-grid settlements in semi-arid climates

Abstract

. (2015). Ventilated Trombe wall as a passive solar heating and cooling retrofitting approach; a low-tech design for off-grid settlements in semi-arid climates. Solar Energy, 122, 820-833. https://doi.org/10.1016Energy, 122, 820-833. https://doi.org/10. /j.solener.2015 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. AbstractIn the coming years, it is anticipated that if we continue with the same pace of energy consumption, communities will continue to face three major challenges; a mounting increase in energy demands, pollution, and global warming. On a local scale, Egypt is experiencing one of its most serious energy crises in decades. The energy consumed in indoor cooling and heating is the biggest portion of total energy consumption in residential buildings. This paper is an experimental simulation study for building retrofitting in off-grid settlements in semi-arid climates, using Trombe wall as a low-tech passive heating and cooling solution. In this study, we made developments to the conventional classic Trombe wall using occupant-centered design and living lab experimental methods. The thermal efficiency of the proposed Trombe wall design is simulated during winter and summer peaks. In the proposed design we used gray paint instead of typical black paint in addition to 15 cm reversible natural wool insulation and two 3 mm thick roll-up wool curtains. The new design reduced the heating load by 94% and reduced the cooling load by 73% compared to the base case with an annual energy savings of 53,631 kW h and a reduction in CO 2 emissions of 144,267 kg of CO 2 . The living lab test proved that the proposed design of the Trombe wall is economically viable and the payback time is 7 months. It is recommended that the proposed design be monitored for a whole year to have an accurate assessment of its efficiency. A post occupancy evaluation is also needed to measure local residents' acceptance and perceived comfort after retrofitting.

Classification, experimental assessment, modeling methods and evaluation metrics of Trombe walls

“…The available evaluation indexes are listed in Table 10. , which is also called CO2 emissions, is used more frequently than other indexes in the environmental assessment of a Trombe wall, not only for a life-cycle analysis [174,[208][209][210] but also for an annual analysis [82,90,173,206]. can be calculated by multiplying the quantity of energy consumption of a Trombe wall by its unit CO2 emissions.…”

Techno-economic study of BIPV in typical Sahara region in Algeria

“…In the last century, the consumption of a large part of the global energy demand in construction has been recorded, energy consumption accounts for about 40% of total global energy consumption, with much of this energy being directed to heating and cooling residential and commercial buildings (Dabaieh & Elbably, 2015). Accelerated reconstruction in the world has caused significant pollution, especially in developed countries, as a result of carbon dioxide emissions due to the large proportion of industrialization in these countries.…”

Numerical and Experimental Investigations of Composite Solar Walls Integrating Sensible or Latent Heat Thermal Storage

“…Integrated into the building envelope, a passive solar wall has drawn researchers' attention in determining the potential benefit achieved from such a system. Previous work has focused on: Trombe-Michel systems yielding more air power entering the room during sunny hours [1]; passive solar air heating and natural ventilation via the buoyancy effect [2]; a ventilated Trombe wall as a passive solar heating and cooling retrofitting approach, serving to reduce the heating and cooling loads by 94% and 73% respectively [3]; the greenhouse effect with a passive Trombe wall providing higher temperature to the greenhouse air [4]; and a Trombe wall with direct gain generating the comfort of thermal heat [5]. Passive solar wall techniques, whether heating or cooling applications, can reduce annual energy consumption in the residential building sector, i.e.…”