Gas energy metering method and device
A measurement method and gas flow technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as deviation, deviation of energy measurement, and low accuracy of energy measurement
Active Publication Date: 2018-11-09
ENN SCI & TECH DEV
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Problems solved by technology
Because the two are in different sampling positions or there is a certain measurement time difference, and the gas will cause irregular changes in calorific value due to changes in gas source components during the transportation process, so the existing measurement methods cannot guarantee the final gas consumption and metering. The synchronization of station calorific value information measurement leads to deviations in energy measurement, especially in the case of frequent fluctuations in the calorific value of combustible gases, which will bring large deviations and low accuracy of energy measurement
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0033] The inventors have found that for a certain gas (generally referring to a flammable gas or a mixed gas containing a flammable gas, which can be a single gas or a mixed gas), the molecular elements and structures of each component are different. The corresponding physical parameters and calorific value are also different, and each component has a combination of physical property parameters and calorific value corresponding to one, that is, the physical parameter X corresponding to component i i (Physical parameter X i can be thermal conductivity λ i , heat capacity C pi , density ρ i , viscosity μ i or thermal diffusivity α i , can also be multiple items i...
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The invention discloses a gas energy metering method and device, relating to the field of gas metering, which can realize the simultaneous metering of flow information and calorific value information, and improve metering accuracy. The gas energy measurement method of the present invention includes: measuring the flow rate and physical property parameters of the measured gas, ensuring that the flow rate and physical property parameters of the measured gas are obtained from the same fluid at the same time; and according to the measured physical property parameters, by The calorific value of the measured gas is calculated by the quantitative relationship between the gas calorific value and the physical parameters; the energy of the measured gas is calculated according to the calculated gas calorific value and the measured gas flow rate.
Description
technical field [0001] The invention relates to the field of gas metering, in particular to a gas energy metering method and device. Background technique [0002] Combustible gas is used as a fuel, and users mainly use the energy released after combustion. Traditional volume or mass measurement methods are difficult to reflect its energy value. In contrast, the energy measurement of flammable gases is a fairer and more scientific measurement method, which is recognized by more and more people. [0003] It is generally believed that the energy (E) contained in a certain amount of gas is the product of the gas amount (Q) and the corresponding calorific value (H), and the energy can be calculated from the gas amount and its calorific value. At present, the energy measurement of combustible gas usually uses the terminal flow metering device to measure the flow, the calorific value measuring device of the metering station to measure the calorific value, and then the upper system...
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IPC IPC(8): G01N33/22
CPCG01N33/225
Inventor 段所行董胜龙张金龙陶仁义李国国
Owner ENN SCI & TECH DEV