Abstract:Current research on Energy Diaphragm Walls (EDWs), both domestically and international-ly, mainly focuses on heat exchange performance, with few studies addressing their impact on thethermal and moisture environment of adjacent underground buildings. This paper investigates the influ-ence of EDWs on the heat and moisture conditions of adjacent basement walls and the heat and mois-ture flux interaction with the indoor environment by establishing a 3D numerical model of coupled heatand moisture transfer. Results showed that the operation of the EDWs significantly changed the direc-tion and intensity of heat and moisture flow on the interior side walls. Although the impact of the mois-ture transfer process on wall temperature change was less than 0.2℃ compared to pure heat transfer re-sults, this small discrepancy can cause a prediction deviation of sensible heat flux density by more than10%. Ignoring the latent heat flux can result in an underestimation of the total thermal load of the un-derground space by more than 2.4%. Moreover, the insulation layer effectively blocks the flux of heatand moisture into the indoor environment.
