Trombe walls with nanoporous aerogel insulation applied to UK housing refurbishments

Dowson, Mark; Harrison, David; Dehouche, Zahir

doi:10.1080/19475411.2014.999730

Cited by 13 publications

(4 citation statements)

References 30 publications

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“…Then, the previously mentioned computer programs may be used effectively for such calculations [17,22,23]. To estimate the impact of transparent insulated envelopes on the thermal balance of a building, simplified stationary algorithms, such as the one proposed in [4] or the "Un-Utilizability Design Method" [24,25] used in [21,26], are utilized. For a shortened analysis of transient heat conduction within an envelope during one day, a simplified model based on electrical analogies and the finite-difference method can be used [27,28].…”

Section: Introductionmentioning

confidence: 99%

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

2020

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A numerical model of a solar wall (SW) with transparent insulation (TI) is proposed in this article. The model is based on the finite-difference method and thermal conductivity equation, with a heat source term for the absorber. Using this model, the energy efficiency of a solar wall with transparent insulation (SW-TI) with honeycomb insulation made of modified cellulose acetate was analyzed in the case of different climatic conditions prevailing in Poland, different orientations of the envelope, and different insulation thicknesses. Simulations were carried out throughout the whole heating period. Monthly energy balances and temperature distributions for the analyzed envelopes at individual moments of the heating period are the basic results of the simulations. It was found that the use of 108 and 88 mm thick insulation was the most recommended in the considered temperate climate. Placing transparent insulation on a wall with an eastern or western orientation caused the annual heat balance of the envelope to decrease by 24–31% in relation to the value of this balance in the case of a southern orientation. The monthly heat balances obtained using the proposed model give results consistent with the method of calculating heat gains for opaque building envelopes with transparent insulation included in the PN-EN ISO 13790:2008 standard.

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Section: Introductionmentioning

confidence: 99%

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

2020

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“…Another approach is based on a prototype of innovative flat plate solar collector with honeycomb TIM that has been constructed and experimentally tested and in parallel, a numerical model has been implemented by Kessentini et al A specific ventilation channel with a thermally actuated door was inserted below the absorber allowing to protect the collector from stagnation conditions, while preserving good performance during normal operation [38]. In Dowson et al [39], the in-situ performance of a flat plate solar air heater connected to a dwelling's active mechanical ventilation system with heat recovery was carried out. Again, in his concept, instead of glass, the cover was a lightweight multiwall polycarbonate panel filled with granular aerogel as the form of TIM.…”

Section: Introductionmentioning

confidence: 99%

A Non-Ventilated Solar Façade Concept Based on Selective and Transparent Insulation Material Integration: An Experimental Study

Čekon

Slávik

2017

Energies

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A new solar façade concept based on transparent insulation and a selective absorber is proposed, tested and compared with conventional insulation and a non-selective type of absorber, respectively. The presented study focuses on an experimental non-ventilated solar type of façade exposed to solar radiation both in the laboratory and in outdoor tests. Due to the high solar absorbance level of the façade, high-and low-emissivity contributions were primarily analysed. All of the implemented materials were contrasted from the thermal and optical point of view. An analysis was made of both thermodynamic and steady state procedures affecting the proposed solar façade concept. Experimental full scale tests on real building components were additionally involved during summer monitoring. An indicator of the temperature response generated by solar radiation exposure demonstrates the outdoor performance of the façade is closely related to overheating phenomena. From the thermal point of view, the proposed transparent insulation and selective absorber concept corresponds to the performance of conventional thermal insulation of identical material thickness; however, the non-selective prototype only provides 50% thermal performance. The results of the solar-based experiments show that with a small-scale experimental prototype, approximately no significant difference is measured when compared with a non-selective absorber type. The only difference was achieved at the maximum of 2.5 K, when the lower temperature was obtained in the solar selective concept. At the full-scale outdoor mode, the results indicate a maximum of 3.0 K difference, however the lower temperature achieves a non-selective approach. This solar façade can actively contribute to the thermal performance of building components during periods of heating.

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“…Typically, the glazing unit would consist of one or two panes of clear glass, but other transparent materials are also possible. For example, Dowson et al [12] investigate lightweight polycarbonate panels filled with nanoporous aerogel insulation as an alternative.…”

Section: Introductionmentioning

confidence: 99%

Solar walls for high-performance buildings

Stankov¹,

Kaloyanov²,

Tomov³

2017

Int. J. EQ

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Passive solar design can reduce building energy demand for heating, cooling and ventilation, while also contributing to the comfort, well-being and productivity of the building's occupants. The successful application of passive solar features, such as solar walls, requires a good understanding of the factors influencing their energy performance and a correct assessment of this performance during the design process. This paper discusses some basic design strategies for successful application of solar walls and the factors with the most significant impact on their efficiency. It summarizes the principle results and findings of an experimental study, based on dynamic simulations and test site measurements. The energy performance of various configurations of unvented solar walls was investigated in different climatic conditions. The outcomes of the dynamic simulations were used to develop a simplified quasisteady-state model, which can be used for approximate evaluation of the heat gains and heat losses through an unvented solar wall on a monthly basis. The model is compatible with the monthly method of EN ISO 13790.

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Trombe walls with nanoporous aerogel insulation applied to UK housing refurbishments

Cited by 13 publications

References 30 publications

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

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

A Non-Ventilated Solar Façade Concept Based on Selective and Transparent Insulation Material Integration: An Experimental Study

Solar walls for high-performance buildings

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