Research On Experimental And Numerical Simulation Of Indoor Air Distribution Characteristic And Thermal Comfort In A Tiny House

In the current situation of dense population and the increasingly rise of housing prices in Chinese cities, the issue of land and house resources has become increasingly prominent. With the advantages of fewer land resources and lower investment cost, high utilization rate of space, comfortable living environment, and adaption to the high mobility of urban life, the tiny houses start to boom accordingly. However, the narrow house closes people’s space and distorts people’s time, which is bound to increase people’s psychological burden. Therefore, to build a reasonable and comfortable air environment in such tiny houses is particularly important. Compared with the conventional buildings, the indoor airflow of tiny house is more vulnerable to the interference of external factors. Currently, here few people studying the indoor airflow environment and thermal comfort of the tiny house. Based on the heat and mass transfer process of air flow, as well as the people-oriented principle, this paper studies the thermal comfort of indoor environment of the tiny house, and explores the indoor air-flow characteristics of the tiny houses and the influence factors.By integrating theoretical analysis with experimental results, a 1:1 building model of tiny house was constructed to study the indoor airflow of the tiny house, as we as measure and record the related parameters of natural ventilation under different conditions. The results indicated that the humidity was closely related to temperature. At a certain temperature, the mean age of air has a big impact on the indoor comfort. By the continuous tests of similar space time by time, it was observed that the indoor air distribution was very stable when the air conditioning system of Air Curtain Ventilation combined top plate radiation was applied. At the same time, it could be found that the air distribution of the area with the large specific heat capacity was less susceptible to the influence of external factors. By comparing the simulation results with the experiment results, the accuracy and reliability of the model were proved. From the simulation results, it could be found that due to the blocking effect of the furniture, the local air flow might interfere with each other, which promoted the air exchange of local space to a certain extent, but the air age could not reflect the indoor comfort degree.Based on the Air Curtain Ventilation, this paper established 32 kinds of side ventilation to study the effects of air supply temperature, velocity and air supply mode on indoor thermal comfort of tiny houses and confirm the best ventilation mode. Through the analysis of the results, it can be found even with different ventilation mode and different air inlet parameters, the indoor airflow also appears an extremely similar distribution. Therefore, combining with different ventilation parameters can also create comfortable indoor environment.By means of experiment and simulation of the indoor thermal comfort in tiny houses, the indoor airflow distribution may also be clear at a glance. By confirming the impact factors for indoor thermal comfort, this paper hopes to solve the indoor thermal comfort of tiny houses, and provide theoretical guidance and technical support for the limited solutions in practical engineering.