Experimental and multidimensional numerical analysis of the thermal behavior of an anhydrite radiant slab floor heating system: A multi-objective sensitivity study

Merabtine, Abdelatif; Mokraoui, Salim; Kheiri, Abdelhamid; Dars, Anass; Hawila, Abed Al-Waheed

doi:10.1016/j.enbuild.2018.06.062

Cited by 19 publications

(14 citation statements)

References 23 publications

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“…In the present case study, the response factors are time constant ߬ and the delay time ‫ݐ‬ ௗ , and the test will be conducted using a validated 2D FDM numerical model. In previous studies [Merabtine, 2018], both 2D FDM and 3D FVM models were developed and experimentally validated regarding the given experimental scenario to estimate the radiant floor surface temperature and the heat flowrate under transient conditions. The FDM model will be used hereafter to derive meta-models.…”

Section: Transient Simplified Semi-analytical Modellingmentioning

confidence: 99%

“…Numerous factors influencing ߬ and ‫ݐ‬ ௗ need to be considered: those related to the ambient air properties; the anhydrite slab thermo-physical properties; the thermo-physical properties of the hot water; and the geometric parameters. To simplify the process, a number of assumptions have been made as mentioned in [Merabtine, 2018]. The ambient air temperature was set between 16 °C and 28 °C.…”

Section: Transient Simplified Semi-analytical Modellingmentioning

confidence: 99%

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Simplified Analytical Model for the Investigation of the Transient Thermal Behavior of the Heating Radiant Slab

Merabtine¹,

Kheiri²,

Mokraoui³

2020

Proceedings of the enviBUILD 2019

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Radiant floor heating systems (FHS) are considered as reliable heating systems since they ensure maintaining inside air temperature and reduce its fluctuations more efficiently than conventional heating systems. The presented study investigates the dynamic thermal response of an experimental FHS equipped with an anhydrite radiant slab. A new simplified model based on an analytical correlation is proposed to evaluate the heating radiant slab surface temperature and examine its thermal behavior under dynamic conditions. In order the validate the developed analytical model, an experimental scenario, under transient conditions, was performed in a monitored full-scale test cell. 2D and 3D numerical models were also developed to evaluate the accuracy of the analytical model. The method of Design of Experiments (DoE) was used to both derive meta-models, to analytically estimate the surface temperature, and perform a sensitivity study.

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Section: Transient Simplified Semi-analytical Modellingmentioning

confidence: 99%

Section: Transient Simplified Semi-analytical Modellingmentioning

confidence: 99%

Simplified Analytical Model for the Investigation of the Transient Thermal Behavior of the Heating Radiant Slab

Merabtine¹,

Kheiri²,

Mokraoui³

2020

Proceedings of the enviBUILD 2019

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“…Numerous factors influencing and need to be considered: those related to the ambient air properties; the anhydrite slab thermo-physical properties; the thermophysical properties of the hot water; and the geometric parameters. To simplify the process, a number of assumptions have been made as mentioned in [Merabtine, 2018]. The ambient air temperature was set between 16 °C and 28 °C.…”

Section: Transient Simplified Semi-analytical Modellingmentioning

confidence: 99%

“…The FHS thermal behavior modeling has been an ongoing research topic for a number of years ([4], [6], [7], [8], [9] [10]). Analytical, numerical, and simplified-model approaches have been used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

A Combined Use of FDM and Doe Method to Derive a New Transient Simplified Semi-Analytical Model: A Case Study of Anhydrite Radiant Slab

2020

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“…Heavy thermal mass can also reduce the efficiency of radiant conditioning systems, as energy is wasted when space is not occupied or wasted on a structure mass rather than contributing directly to the conditioning of the required environment [56]. In terms of reaction time, an experiment with radiant slab floor done by Merabtine et al [57] showed that the system surface needs about 4 h to be heated up from 20 • C to 29 • C. Hence, this heavy system requires an advanced control system involving the water flow rate, inlet water temperature, and reaction time [18]. Additionally, the slow reaction time can increase the risk of condensation in the cooling mode if the space's humidity increases faster than the system response [11].…”

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confidence: 99%

Radiant Conditioning Retrofitting for Residential Buildings

et al. 2022

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In order to achieve Australia’s greenhouse gas emissions reduction targets, a majority of the existing residential building stock in Australia will require retrofitting in favour of energy-efficient solutions. This paper considers retrofitting for conditioning to be one of the most straightforward and offers the greatest potential to deliver significant comfort and energy-saving results. Radiant conditioning systems are not new, yet some game-changing innovations have taken place over the last decade that may require an entire paradigm shift in the manner we condition our buildings. The reiteration of the principle ‘thermally active systems’ suggests that our buildings need to accommodate these systems into the fabric of building components. However, extremely few products and/or innovative solutions for doing such seem to be provided by the industry. We seem incompetent with solutions that are not costing the Earth, insulating, lightweight, and offering an instant response time to conditioning. We still have the concept embedded in our minds that radiative systems consist of heavy ‘combat’ construction with time lags of a day or two and that they are very costly to implement, especially if we are to retrofit a project. The purpose of this paper is to rectify and change our understanding of radiant systems, namely through a review of the existing technology and its recent advancements. It intends to introduce the fact that radiant systems can become highly reactive, responsive, and thermally dynamic conditioning systems. Lightweight radiant systems can be 40% more energy-efficient than common air conditioners and can respond in less than 15 min rather than in the hours required of heavy radiant systems. Thus, an insulated, lightweight radiant system is ideal for retrofitting residential buildings. Furthermore, this paper supports and introduces various systems suited to retrofitting a residential building with hydronic radiant systems.

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Experimental and multidimensional numerical analysis of the thermal behavior of an anhydrite radiant slab floor heating system: A multi-objective sensitivity study

Cited by 19 publications

References 23 publications

Simplified Analytical Model for the Investigation of the Transient Thermal Behavior of the Heating Radiant Slab

Simplified Analytical Model for the Investigation of the Transient Thermal Behavior of the Heating Radiant Slab

A Combined Use of FDM and Doe Method to Derive a New Transient Simplified Semi-Analytical Model: A Case Study of Anhydrite Radiant Slab

Radiant Conditioning Retrofitting for Residential Buildings

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