| 摘要 |
PURPOSE:To analyze with a high accuracy a flow of air between many chambers by estimating a ventilation air quantity of each space and a ventilation air quantity between each chamber and the open air by the minimum square-law method, based on an analytic model of a simultaneous differential equation of a gas density related to a building to be measured. CONSTITUTION:A gas flow rate controller 2 and solenoid valves 3, 4 are provided on a pipe for injecting a tracer gas into each chamber from a gas bomb 1, and a gas density analyzer 11 is provided on an exhaust line. In this state, by switching the solenoid valves 3, 4, a tracer gas is injected into each chamber with schedule-like or random-like injection flow rate and injection time, and by the controller 2 and the analyzer 11, the gas injection flow rate and a continuous observation data of a gas density of each chamber and the open air are obtained. Also, the CPU 10 estimates a ventilation air quantity between each chamber and a ventilation air quantity between each chamber and the open air by the minimum square-law method applied to a simultaneous differential equation, based on an analytic model of a simultaneous differential equation of a gas density related to a building to be measured. |
