Experimental validation of frequency-domain finite-difference model of active pipe-embedded building envelope in time domain by using Fourier series analysis

Xie, Jing; Xu, Xin; Li, Anbang; Zhu, Qi‐Zhi

doi:10.1016/j.enbuild.2015.04.043

Cited by 24 publications

(6 citation statements)

References 19 publications

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“…Several studies developed theoretical models validated with experimental. These models were used to find the adequate values for pipes separation and pipes depth within the walls [31], [33], [35], [37] water inlet temperature for cooling or heating [30], [37], water velocity and volumetric flow rate [30], [31], [33]. Modeling studies are relevant for the design of TABS because they allow researchers to find suitable values for the parameters mentioned above.…”

Section: Discussionmentioning

confidence: 99%

“…The authors concluded that the difference between the analytically calculated average temperature and the experimental measurements is 13.7 and 8.6% by contact and non-contact methods. A research about the thermal behavior of a building wall construction with embedded tubes was developed by Xie et al, [30]. Meanwhile, the average difference of about 0.5°C on the outlet temperature of the fluid was found throughout the day.…”

Section: Tabs Embedded In Building Wallsmentioning

confidence: 99%

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A Review of Thermally Activated Building Systems (TABS) for Improving the Thermal Behavior of Buildings

Villar-Ramos¹,

Hernández-Pérez²,

Aguilar-Castro³

et al. 2022

Preprint

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In recent years, several alternatives for improving the thermal comfort conditions inside buildings have been proposed. Among these alternatives, Thermally Activated Building Systems (TABS) have become of interest due to the benefits this technology brings to the building sector. The TABS are embedded in different building components and exchange heat with building envelope to improve the indoor air temperature. This review presents relevant results presented in the literature on the thermal behavior of TABS, the different types of TABS configurations, and the main parameters of TABS studied such as pipe separation, fluid inlet temperature, fluid velocity, and volumetric flow rate. The potential of TABS to improve thermal comfort conditions and provide energy savings is also discussed. Further, this study presents the different modes of application.

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Section: Discussionmentioning

confidence: 99%

Section: Tabs Embedded In Building Wallsmentioning

confidence: 99%

A Review of Thermally Activated Building Systems (TABS) for Improving the Thermal Behavior of Buildings

Villar-Ramos¹,

Hernández-Pérez²,

Aguilar-Castro³

et al. 2022

Preprint

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“…Many researchers from all over the world have been involved in the analysis of building structures with integrated energy-active elements. We provide references to some of the main scientific studies in this area of research [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Current Situationmentioning

confidence: 99%

Parametric study of the energy potential of a building’s envelope with integrated energy-active elements

Kalús

Koudelková²,

Mučková³

et al. 2022

Acta Polytech

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Building structures with integrated energy-active elements (BSIEAE) present a progressive alternative for building construction with multifunctional energy functions. The aim was to determine the energy potential of a building envelope with integrated energy-active elements in the function of direct-heating, semi-accumulation and accumulation of large-area radiant heating. The research methodology consists in an analysis of building structures with energy-active elements, creation of mathematical-physical models based on the simplified definition of heat and mass transfer in radiant large-area heating, and a parametric study of the energy potential of individual variants of technical solutions. The results indicate that the increase in heat loss due to the location of the tubes in the structure closer to the exterior is negligible for Variant II, semi-accumulation heating, and Variant III, accumulation heating, as compared to Variant I, direct heating, it is below 1 % of the total delivered heat flux. The direct heat flux to the heated room is 89.17 %, 73.36 %, and 58.46 % of the total heat flux for Variant I, Variant II and Variant III, respectively. For Variant II and Variant III, the heat storage accounts for 14.84 %, and 29.86 % of the total heat flux, respectively. Variants II and III appear to be promising in terms of heat/cool accumulation with an assumption of lower energy demand (at least 10 %) than for low inertia walls. We plan to extend these simplified parametric studies with dynamic computer simulations to optimise the design and composition of the panels with integrated energy-active elements.

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“…Xie, Xu, Li and Zhu in [14] describe a frequency-domain active building envelope model (FDFD) with TBs, which can directly predict the frequency thermal response of the active building envelope with integrated pipes and provide some important guidelines for system control and system sizing. This paper presents an experimental validation of this model in the time domain using Fourier series analysis.…”

Section: Description Of the Known State Of The Art And Contribution T...mentioning

confidence: 99%

Energy, Economic and Environmental Assessment of Thermal Barrier Application in Building Envelope Structures

2021

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Thermal engineering requirements for building structures are becoming more and more strict. Thermal barriers (TBs) are energy-active elements integrated into the building structure in which a heat transfer medium (water or air) flows. A survey of the scientific literature on the subject points to the fact that this is a very topical and promising area of research and, so far, most studies on TBs are based on calculations, computer simulations and experimental measurements. Few studies have focused on the economic and environmental aspects of TB use. Following the research results presented by authors from all over the world, as well as our contributions in this scientific field that are described in a European patent, three utility models and scientific articles, in this study we have focused on the evaluation of the TB in terms of energy performance, economic efficiency and environmental friendliness by comparing the use of a classical envelope wall with the required thickness of thermal insulation meeting the normative requirements for thermal resistance R ((m2K)/W) and a perimeter wall with an integrated TB significantly eliminating the thermal insulation thickness. We evaluate the use of the thermal barrier using: economic indicator one, where we compare the cost of heat delivered to the TB in a structure with significantly eliminated thermal insulation and the saved cost of thermal insulation at the standard thickness; economic indicator two, where we compare the cost of heat delivered to the TB in a structure with significantly eliminated thermal insulation with the potential gain from the sale of the useful area of the building gained compared to the area at the normative thickness of thermal insulation; and economic indicator three, where we compare the cost of heat delivered to the TB in a structure with significantly eliminated thermal insulation with the cost of grey energy at the normative thickness of thermal insulation. Based on a parametric study based on theoretical assumptions, it can be concluded that the thermal barrier shows a very promising and efficient solution in terms of the evaluation of economic indicators one to three, which are even more significant if we use heat for the TB from renewable energy sources (RES) or waste heat.

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Experimental validation of frequency-domain finite-difference model of active pipe-embedded building envelope in time domain by using Fourier series analysis

Cited by 24 publications

References 19 publications

A Review of Thermally Activated Building Systems (TABS) for Improving the Thermal Behavior of Buildings

A Review of Thermally Activated Building Systems (TABS) for Improving the Thermal Behavior of Buildings

Parametric study of the energy potential of a building’s envelope with integrated energy-active elements

Energy, Economic and Environmental Assessment of Thermal Barrier Application in Building Envelope Structures

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