Semi-analytical model for thermal response of anhydrite radiant slab
| Autor: | Abderrezak Belmerabet, Abdelhamid Kheiri, Salim Mokraoui, Abdelatif Merabtine |
|---|---|
| Přispěvatelé: | Groupe de Recherche en Sciences Pour l'Ingénieur - EA 4694 (GRESPI), Université de Reims Champagne-Ardenne (URCA)-SFR Condorcet, Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Énergies et Mécanique Théorique et Appliquée (LEMTA ), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Materials science Finite volume method Geography Planning and Development 0211 other engineering and technologies Time constant Finite difference method 02 engineering and technology Building and Construction Mechanics 010501 environmental sciences 01 natural sciences 7. Clean energy Heat capacity Volumetric flow rate [SPI]Engineering Sciences [physics] Thermal conductivity Thermal Slab 021108 energy 0105 earth and related environmental sciences Civil and Structural Engineering |
| Zdroj: | Building and Environment Building and Environment, Elsevier, 2019, 153, pp.253-266. ⟨10.1016/j.buildenv.2019.02.030⟩ |
| ISSN: | 0360-1323 |
| DOI: | 10.1016/j.buildenv.2019.02.030 |
| Popis: | The choice of heating systems in buildings is primarily guided by the desired comfort level and energy saving concerns. Radiant floor heating systems are suitable for satisfying these requirements by considering the trade-off between minimizing the thermal inertia of the radiant slab and maintaining the surface temperature below a certain value. In this study, 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. A full-scale test cell, monitored by a set of sensors, was used to obtain measurements under transient conditions. In addition, numerical models based on the finite difference method and the finite volume method were developed and validated under transient conditions. The design of experiments method is used to derive meta-models for the time constant and the delay time in order to compute the surface temperature. The sensitivity analysis indicated that the specific heat capacity of the slab material and the heating water flowrate significantly affect the time constant as opposed to the insignificant effect of the thermal conductivity and the heating water pipe inner diameter. In addition, it was found that all of these parameters, except for the heating water flowrate, have a significant impact on the delay time. Compared to the experimental results, the maximum relative deviations on the computed surface temperature were within 2% for the numerical model and 4% for the semi-analytical model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect