Paper Conference

Proceedings of ASim Conference 2016: 3rd Asia conference of IBPSA-China, Japan, Korea


An Optimization study on Temperature based Automatic windows opening of highly insulated soil walls residential building

M. Tayasu, A. Ozaki

Abstract: In recent years, energy-saving standards have been revised for the realization of a lowcarbon society. Because energy consumption is increasing, especially in the business and residential sector, energy consumption reduction is urgently needed. Thus, insulated airtight houses has been promoted. However, to perform ventilation with the purpose of outside air cooling and night purging, also by cold storage in an interior material with heat storage capacity such as soil walls, the cooling load can be reduced. The use of windows which open and close automatically, combined with air temperature and humidity sensors, indoor temperature and humidity sensors, rain sensors, etc., make it possible to control ventilation. However, because outside air humidity flows into a room through ventilation, the humidity in the room becomes high. It is feared that the indoor environment is deteriorated. Therefore, in this study, through the interrelated simulation of heat and moisture transfer and airflow using THERB for HAM, which can predict temperature, humidity, and load of whole building elements, we have studied the evaluation of the comfort of the indoor environment at the time of ventilation and the optimal control method of the window. First, there is an experimental house located in Ena, Gifu Prefecture, and actual measurements in the house using the soil walls for the interior material were carried out. Secondly, we examined the effect of the interior material by using the numerical simulation. Lastly, the optimal control of windows which open and close is estimated.
Keywords: Automatic windows, Ventilation, Soil wall, Cool storage, Numerical Simulation