gabriel-happle
commented
8 years ago Regarding moisture:
ISO 13791:2012(E) - 5 Determination of internal humidity ... "Annex K provides a general overview of the calculation method for internal humidity, which is similar to that of internal air temperature (see 4.2.1). Annex K describes the calculation considering only the influx and outflux of moisture due to internal moisture production and ventilation, on the assumption that “walls and other internal items such as furniture and books” (described as “walls and others” from here on) do not absorb or desorb moisture. For the calculation considering moisture absorption into or desorption from walls and others, refer to Reference [15] in the Bibliography. This calculation can be somewhat more complex than that of considering only temperature because heat and moisture in walls and others interact with each other." ...
[15] IEA ANNEX41 “Whole building heat, air and moisture transport (MOIST-ENG)”,Final Report, Subtask 1, April 2008
adam-rysanek
jimenofonseca
From 3for2 and related studies in the last 2 years... here is my take on important and less important calibration parameters we've found for the accurate determination of total and peak energy consumption of 3for2 and similar spaces...
Highly important: Infiltration, Thermal and moisture capacitances, Shading (definitely don't overlook this, especially at early morning/evening due to adjacent structures/trees), System operational schedules (e.g., especially for high-performance, low-infiltration buildings), Occupant stochasticity with respect to comfort preferences (e.g., predisposition to low or high indoor temperatures, predisposition to using A/C when sleeping, at home, etc.);
Less important: Internal gains (at least for typical office and residential floor plates), Occupant stochasticity with respect to time (In my observation, Singapore is a special case where "atomic families" and workplaces still persist. I don't expect mean transient occupancy profiles in office and residences differing much from true stochastic profiles)
In the middle between "highly" and "less" important parameters are the classic cases of facade construction properties, air-con system properties, etc, but I view there is enough literature available to handle these with reasonable probabilistic accuracy. We needed special effort to deal with the capacitances and infiltration, for which we could find little relevant guidance on how to characterise these for the tropical context.