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- W2605275050 abstract "Implicit schemes require important sub-iterations when dealing with highly nonlinear problems such as the combined heat and moisture transfer through porous building elements. The computational cost rises significantly when the whole-building is simulated, especially when there is important coupling among the building elements themselves with neighbouring zones and with HVAC (heating ventilation and air conditioning) systems. On the other hand, the classical Euler explicit scheme is generally not used because its stability condition imposes very fine time discretisation. Hence, this paper explores the use of an improved explicit approach—the DuFort–Frankel scheme—to overcome the disadvantage of the classical explicit one and to bring benefits that cannot be obtained by implicit methods. The DuFort–Frankel approach is first compared to the classical Euler implicit and explicit schemes to compute the solution of nonlinear heat and moisture transfer through porous materials. Then, the analysis of the DuFort–Frankel unconditionally stable explicit scheme is extended to the coupled heat and moisture balances on the scale of a one- and a two-zone building models. The DuFort–Frankel scheme has the benefits of being unconditionally stable, second-order accurate in time O(Δt2) and to compute explicitly the solution at each time step, avoiding costly sub-iterations. This approach may reduce the computational cost by twenty as well as it may enable perfect synchronism for whole-building simulation and co-simulation." @default.
- W2605275050 created "2017-04-14" @default.
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- W2605275050 date "2017-11-07" @default.
- W2605275050 modified "2023-10-02" @default.
- W2605275050 title "An improved explicit scheme for whole-building hygrothermal simulation" @default.
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- W2605275050 doi "https://doi.org/10.1007/s12273-017-0419-3" @default.
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