Carbon dioxide tracing gas method-based room ventilation frequency testing system and method

A technology of carbon dioxide and air change times, which is applied in heating and ventilation control systems, heating and ventilation safety systems, and control inputs related to air characteristics, etc., to achieve the effects of low intervention, improved measurement efficiency, and high test accuracy

Pending Publication Date: 2019-09-20
ZHEJIANG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a room ventilation rate testing system based on the carbon dioxide tracer gas...

Method used

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  • Carbon dioxide tracing gas method-based room ventilation frequency testing system and method

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing.

[0028] Such as figure 1 As shown, a room ventilation rate test system based on carbon dioxide tracer gas method, including carbon dioxide cylinder 1, decompression pressure gauge 2, mass flow controller 3, control center 4, gas pipeline system 5, indoor sensor 6, Outdoor sensor7. The indoor sensor 6 is set in the room to be tested (in the range of the dotted line in the figure), and the outdoor sensor 7 is set outside the room to be tested. The gas outlet of the carbon dioxide cylinder 1 communicates with the inlet of the mass flow controller 3 through the gas pipeline system 5, and the gas outlet of the mass flow controller 3 communicates with the room to be tested through the gas pipeline system 5; the mass flow controller 3 , the indoor sensor 6 and the outdoor sensor 7 are signal-connected with the control center 4 .

[0029] Carbon dioxide cylinder 1 is a steel seam...

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Abstract

The invention discloses a carbon dioxide tracing gas method-based room ventilation frequency testing system and method. The system comprises a carbon dioxide steel cylinder, a pressure gauge, a mass flow rate controller, a control center, a gas pipeline system, an indoor sensor and an outdoor sensor; the indoor sensor and the outdoor sensor are arranged inside and outside a room to be tested respectively; the carbon dioxide steel cylinder is communicated with the mass flow rate controller; the mass flow rate controller is communicated with the room to be tested through the gas pipeline system; the mass flow rate controller, the indoor sensor and the outdoor sensor are in signal connection with the control center; the control center controls the carbon dioxide steel cylinder to release carbon dioxide gas at a constant speed and conveys the carbon dioxide gas to the room to be tested through the gas pipeline system, meanwhile, the indoor sensor and the outdoor sensor collect data according to a step length; after set time comes, calculation is performed according to the data acquired by the sensors, so that ventilation frequency values under indoor and outdoor working conditions are obtained. The system and the method have the advantages of low equipment cost, high testing speed and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of building energy conservation, in particular to the technical field of building testing in building energy conservation, and relates to a room ventilation rate testing system, in particular to a room ventilation rate testing system and method based on a carbon dioxide tracer gas method. Background technique [0002] The traditional method of testing the number of air changes is mainly based on SF 6 The tracer gas method and the blast door method for tracer gas. The blower door method needs to use a fan to supply air to form a certain pressure difference between the indoor and the outdoor, and calculate the number of air changes in the room by measuring the amount of air blown by the fan per unit time; the test device is generally composed of a fan, sealing device, and flow metering equipment. The testing device of this method is complicated, and the testing process is loaded down with trivial details and ...

Claims

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Application Information

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IPC IPC(8): G01D21/00F24F11/46F24F11/61F24F11/64F24F110/70F24F110/10F24F110/20
CPCG01D21/00F24F11/46F24F11/61F24F11/64F24F2110/70F24F2110/10F24F2110/20
Inventor 赵康王登辉赵宇杰葛坚
Owner ZHEJIANG UNIV
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