The Simulation And Investigation On Indoor Swimming Pool Condensation Using Wall-Attached-Jet In Cold Area

As a result of humidity and temperature character of indoor natatorium, the condensation status of the domestic natatorium exists commonly especially in winter, which causes the indoor air quality (IAQ) problem, erodent of building envelope, reduction of the natatorium's life, and sometimes even influence the ordinary use. The main reason of the condensation is that the temperature of building envelope is lower than the dew point temperature of indoor air. Accordingly, to rise the temperature of the building envelope, until it is higher than the dew point temperature of indoor air is the key to solve the condensation problem. As is proved in projects: as long as the building envelope temperature is 1-2℃higher than indoor air dew point temperature , condensation of inside walls should be avoided effectively.This article chooses a new natatorium of Northeast Forestry University. Physics models are established base on the indoor natatorium's humidity and temperature characteristics in winter, and the parameters of heat engineering are determined. CFD software Airpak is used to simulate, Ordinary air-supply and wall-attached-jet air-supply are respectively simulated to study indoor natatorium thermal field, moisture field and humidity field. Also the possility of condensation in inside walls are analysed. The adventure and disadventure of this two air-supply styles in preventing condensation is compared.In addition, aim at the factors that affect the effect of wall-attached-jet, this article inspects the influences of different supply speed,temperature and different tuyere form on the effect of wall-attached-jet. This article compare the effect of wall-attached-jet with the speed of 3m/s,5m/s,7m/s, then compare the effect of wall-attached-jet with the temperature of 28℃,30℃,32℃, At last compare the effect of wall-attached-jet between the rectangle tuyere form and circule tuyere form.The result of this research has much theoretical and utilizable value for the design of the natatorium and similar building in north regions, and supply some useful information for future engineering application of wall-attached-jet.