ArticleAnalysis of passive heating concepts
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Cited by (28)
Experimental heat flux analysis of a solar wall design in Tunisia
2016, Journal of Building EngineeringCitation Excerpt :Fig. 9 gives the variation of the experimental heat exchange coefficient of radiation on the outer wall surface. The evolution of this coefficient is periodic and its experimental value varies between 4.2 W/m2 K and 5.6 W/m2 K, which is in good agreement with the results found in the literature, including the work of Nayak et al. [35] who cited a coefficient in the order of 4.9 W/m2 K.. The convective heat transfer occurs between the outer surface of the wall and the air gap, thus, to identify the corresponding coefficient hm1,f, it is necessary to quantify the Nusselt number.
CFD simulation of the thermal performance of an opaque water wall system for Australian climate
2016, Solar EnergyCitation Excerpt :This result along with the results shown in Figs. 3–5 demonstrates that the water column acts as a buffer layer to mitigate temperature fluctuations in the uncontrolled room air. For the purpose of exploring energy saving potential of various energy saving strategies, the heat flux to or from a temperature-regulated room has been examined in the literature (e.g. Nayak et al., 1983; Kaushik and Kaul, 1989). Here the time series of the heat flux entering into the controlled room is presented in Fig. 7a for the different water column thicknesses.
A review of research and development on water wall for building applications
2016, Energy and BuildingsCitation Excerpt :Moreover, the temperature swing was smaller when the entire insulation layer was applied outside rather than inside the thermal storage water wall. Nayak et al. [22] compared the thermal performance of four typical passive heating concepts, namely a Trombe wall, a water wall, and a solarium under two different configurations, one with the glazing uncovered and the other with the glazing covered by a moveable insulation during off sunshine hours. Their calculations showed that the water wall system resulted in a less temperature fluctuation and a higher average heat flux than the Trombe wall when night-time insulation was used, and a phase shift of almost 12 h was observed for a 0.22 m thick concrete wall next to a 0.10 m thick water wall.
Active pipe-embedded structures in buildings for utilizing low-grade energy sources: A review
2010, Energy and BuildingsEnergy analysis of a passive solar system
1998, Revue Generale de Thermique
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Present address: Energy Systems Engineering, I.I.T., Powaz, Bombay-400076, India.