A method and test device for measuring dynamic ventilation times of small caves in grotto temples

Abstract

The invention discloses a method for determining the dynamic ventilation times of a small cave in a grotto temple and a testing device, comprising testing steps, S1: measuring the CO2 background concentration of the environment outside the cave: placing a calibrated CO2 monitoring device outside the cave, and reading the reading at 10 minutes as the background concentration; S2: arranging monitoring points in the cave and exhausting the residual CO2 gas in the cave: opening the cave door to be tested, arranging three CO2 monitoring points at a height of 1.5m at three points of the diagonal quarter of the main room of the cave, using the calibrated CO2 monitoring device for monitoring, accelerating the discharge of the residual CO2 gas by stirring the air or adsorbing CO2 through an auxiliary testing device, and when the reading of the equipment in the cave is consistent with that outside the cave, closing and sealing the cave door with a plastic sheet; by fixing the CO2 concentration at the start and end times of the test, the numerator in the original calculation formula can be changed into a constant, and the ventilation times can be calculated only by knowing the test duration.

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