Abstract
The basic principle of low exergy building systems is the minimization of excess temperature gradients across building systems so that the quality of the energy supplied to the building better matches with the actual demand of the building. Several low exergy technologies which were developed at ETH, Switzerland were implemented in a small research laboratory (BubbleZERO) in Singapore to evaluate the performance of these systems for the tropics. In this paper, the indoor space conditioned by these technologies is analysed by computational fluid dynamics (CFD). Different sources of heat, water vapour and carbon dioxide have been modelled with suitable boundary conditions and emission sources., The CFD results have been verified with different numerical settings and the impact of different turbulence models and mesh densities on the accuracy of the CFD results has been studied. The results have shown that SST k-ω and Reynolds Stress turbulence models have close predictions while the standard k-ε model underestimate the temperature values. In addition, indoor air quality concerns like cold feet or excessive temperature difference for occupants in the space are investigated by checking the thermal stratification in the space.
| Original language | English |
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| Publication status | Published - 7 Jul 2014 |
| Externally published | Yes |
| Event | 13th International Conference on Indoor Air Quality and Climate - Duration: 7 Jul 2014 → … |
Conference
| Conference | 13th International Conference on Indoor Air Quality and Climate |
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| Period | 7/07/14 → … |