Numerical and experimental analysis of floor heat storage and release during an intermittent in-slab floor heating process |
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| Affiliation: | 1. The College of Architecture and Civil engineering, Beijing University of Technology, Beijing 100124, PR China;2. College of Architectural Engineering, Qingdao Agricultural University, Qingdao 266109, PR China;1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China;2. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China;1. College of Civil Engineering, Hunan University, Changsha 410082, China;2. Center for the Built Environment, University of California, Berkeley, CA 94720, USA;1. Department of Building Science, Tsinghua University, Beijing 100084, China;2. Key Laboratory of Eco Planning & Green Building, Ministry of Education, Tsinghua University, China |
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| Abstract: | In this paper, the floor heat storage in the preheating period and the heat release in the intermittent period during an intermittent in-slab floor heating process are investigated. Numerical simulations are used to determine the effect of the design and operating parameters, i.e., the pipe spacing, the filling layer thickness and the pipe water temperature, on the floor heat storage and heat release. The relationship between the intermittent time and the preheating time is also obtained. The results show that pipe spacing has the dominant effect on the preheating time. In the intermittent period, 2 h later, the two-dimensional heat transfer process can be modeled as a one-dimensional vertical heat transfer process, and the filling layer thickness has a relatively large effect on the heat release time. The numerical simulation method is shown to be accurate to at least within 7% of the experimental measurements. |
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| Keywords: | Intermittent heating Surface temperature Floor heat storage and release COMSOL |
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