Abstract
A pipe-embedded wall (PE-wall) can effectively reduce the building load through the water circulation in the embedding pipes. Using renewable energy as an alternative, the water may be produced by solar water heater, or by cooling tower etc. This PE-wall may be used to reduce the building energy consumption, which is beneficial to achieve nearly zero energy building (nZEB) target. In this study, a simple parameter configuration scheme is proposed for the RC simplified dynamic model of the PE-wall. Based on the wall geometry and thermal properties, the scheme can directly determine thermal resistance (R) values and thermal capacitance (C) values for a 5R3C simplified dynamic model. The finite element frequency domain (FEFD) models and time-domain CFD models of three typical (i.e., light-weight, medium-weight and heavy-weight) PE-walls are established as reference. The simplified 5R3C model with parameters determined by the configuration scheme is validated in terms of their thermal responses both in frequency domain and time domain. Under specified dynamic boundaries, mean relative errors of heat flow on the internal wall surface and internal pipe surface are less than 5 %. The comparison results indicate the good accuracy and reliability of the parameter configuration scheme for the RC simplified dynamic model.
Published Version
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