Study on moisture condensation on the interior surface of buildings in high humidity climate

Abstract Hot and humid air infiltration would lead to moisture condensation on the interior surface of buildings in high humidity climate, which has a negative influence on the indoor environment and building life. This study aims to expound the transient property of moisture condensation on the interior surface of buildings in high humidity climate, and find the typical places where moisture condensation often occurs by numerical and experimental methods. A numerical model of a test chamber is established, which is used to predict the distribution of heat and humidity due to air infiltration. Simulation results from the application of FLUENT software are compared with the experimental data, and a validation procedure is presented. The effect of outdoor air temperature, humidity ratio and wind speed on the moisture condensation state is investigated. The results prove that these parameters have a significant impact on the start time, duration and magnitude of moisture condensation. Two regression equations are developed from the experimental results, which describe the relationship between the indoor air temperature, humidity and the factors of infiltrated air. Meanwhile, two kinds of dew-proof solutions are proposed.

[1]  Michael Ambrose,et al.  Air Tightness of New Australian Residential Buildings , 2017 .

[2]  Jing Liu,et al.  CFD prediction of surface condensation on walls and its experimental validation , 2004 .

[3]  Caesar Abi Shdid,et al.  Validating a new model for rapid multi-dimensional combined heat and air infiltration building energy simulation , 2015 .

[4]  Yacine Rezgui,et al.  A novel concept to measure envelope thermal transmittance and air infiltration using a combined simulation and experimental approach , 2017 .

[5]  Sherif Goubran,et al.  Comparing methods of modeling air infiltration through building entrances and their impact on building energy simulations , 2017 .

[6]  Xianting Li,et al.  An algorithm to predict the transient moisture distribution for wall condensation under a steady flow field , 2013 .

[7]  Carolina Aparicio-Fernández,et al.  Temperature and humidity transient simulation and validation in a measured house without a HVAC system , 2016 .

[8]  Shinsuke Kato,et al.  Optimum design for indoor humidity by coupling Genetic Algorithm with transient simulation based on Contribution Ratio of Indoor Humidity and Climate analysis , 2012 .

[9]  Targo Kalamees,et al.  Air tightness and air leakages of new lightweight single-family detached houses in Estonia , 2007 .

[10]  G. P. Vasilyev,et al.  Modeling moisture condensation in humid air flow in the course of cooling and heat recovery , 2016 .

[11]  N. V. Peskov,et al.  Estimation of the thermal effect of ground moisture condensation on heat transfer outside a geothermal borehole , 2014 .

[12]  Guangcai Gong,et al.  Investigation of moisture condensation on papermaking plant envelopes in high humidity environment b , 2011 .

[13]  P. Rattanadecho,et al.  Numerical study of vertical solar chimneys with moist air in a hot and humid climate , 2016 .

[14]  Magnus Mattsson,et al.  Evaluation of the LBL and AIM-2 air infiltration models on large single zones: Three historical churches , 2014 .

[15]  M. Woloszyn,et al.  Numerical prediction of indoor air humidity and its effect on indoor environment , 2003 .

[16]  Yanfeng Liu,et al.  Effect of the night ventilation rate on the indoor environment and air-conditioning load while considering wall inner surface moisture transfer , 2014 .

[17]  Seung-Yeong Song,et al.  Evaluation of the Thermal Environment for Condensation and Mold Problem Diagnosis Around Built-in Furniture in Korean Apartment Buildings during Summer and Winter , 2016 .

[18]  Th. Frank,et al.  CFD modelling and validation of wall condensation in the presence of non-condensable gases , 2014 .

[19]  Michael Wolf,et al.  Weighted Least Squares and Adaptive Least Squares: Further Empirical Evidence , 2017, Robustness in Econometrics.

[20]  Crystal L. Pilon,et al.  The Effect of Indoor Humidity on Water Vapor Release in Homes , 2007 .

[21]  Ingy I. El-Darwish,et al.  Retrofitting strategy for building envelopes to achieve energy efficiency , 2017 .