A sensitivity analysis of the design parameters for thermal comfort of thermally activated building system
| Autor: | S.M. Shiva Nagendra, D.G. Leo Samuel, M.P. Maiya |
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| Rok vydání: | 2019 |
| Předmět: |
Operative temperature
Multidisciplinary Materials science business.industry Passive cooling 020209 energy Multiphysics 0211 other engineering and technologies Thermal comfort 02 engineering and technology Computational fluid dynamics Thermal conductivity 021105 building & construction 0202 electrical engineering electronic engineering information engineering Sensitivity (control systems) Composite material business Roof |
| Zdroj: | Sādhanā. 44 |
| ISSN: | 0973-7677 0256-2499 |
| DOI: | 10.1007/s12046-018-1033-5 |
| Popis: | Thermally activated building system (TABS) can be operated at relatively higher water temperature. Hence, it can be coupled with passive cooling systems. This paper investigates the influences of three design parameters on thermal comfort of TABS using COMSOL Multiphysics, a computational fluid dynamics (CFD) tool. For the same inlet velocity, an increase in the pipe inner diameter from 9 to 17 mm decreased the operative temperature (OT), a thermal comfort index, by 1.8°C. An increase in the pipe thermal conductivity from 0.14 to 1.4 W/mK reduced the average OT by 2.5°C. However, a further increase in thermal conductivity had no significant influence. For cooling pipes embedded at a constant depth, an increase in the thickness of both roof and floor from 0.1 to 0.2 m delayed and reduced the maximum OT by 48 minutes and 0.3°C, respectively. |
| Databáze: | OpenAIRE |
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