Energy meter based on natural gas thermophysical property-calorific value model

A technology for measuring meters and natural gas, which is applied in measurement devices, material excitation analysis, instruments, etc., can solve the problem of lack of natural gas energy measurement equipment, etc., and achieve the effect of accurate measurement results.

Pending Publication Date: 2022-05-17
ZHEJIANG MEASUREMENT SCI RES INST
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  • Abstract
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Problems solved by technology

[0003] The vast majority of natural gas gate stations in my country already have the measurement conditions for indirectly obtaining the unit natural gas calorific value through online chromatographic determination of natural gas components, and can basically implement the relevant requirements of the "Measures"; For low-voltage natural gas users such as small and micro enterprises and households with the same measurement conditions, there is still a lack of corresponding natural gas energy measurement equipment in China

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  • Energy meter based on natural gas thermophysical property-calorific value model
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  • Energy meter based on natural gas thermophysical property-calorific value model

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with accompanying drawing:

[0037] According to the present invention, an energy meter based on the natural gas thermophysical property-calorific value model, the energy meter is composed of a main body 1, a screen hole 2, an electronic screen 3, a control panel 4, a base 5, a movable back cover 6, Composed of a certain number of connection ports 7 and transmission antennas 8, the electronic screen 3 is installed on the main body 1 through the screen hole 2, the control panel 4 is embedded on the main body 1, and the base 5 is horizontally arranged at the level of the main body 1, The movable back cover 6 is arranged on the main body 1, the connection port 7 is inlaid on the main body 1, the transmission antenna 8 is arranged on the top of the main body 1, a controller is arranged inside the main body 1, and the The database uses the expert database obtained from the established natural gas thermophys...

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Abstract

The invention relates to an energy meter based on a natural gas thermophysical property-calorific value model, which is characterized in that the low calorific value and key thermophysical property of natural gas under various conditions are measured and recorded by proportioning different component proportions of methane, ethane, propane, carbon dioxide and the like in low-pressure natural gas at the temperature of-30 DEG C to 70 DEG C and the absolute pressure of 70 kPa to 200 kPa; according to the method, gas density, water dew point, hydrocarbon dew point, heat conductivity, specific heat capacity and other thermophysical property and calorific value corresponding relations are screened, a plurality of key thermophysical property-calorific value corresponding models are established by means of numerical analysis and the like, an expert database is formed, and the measurement result is more accurate; the method is mainly used for low-pressure natural gas user sides of small and micro enterprises, families and the like without the same metering condition of a gate station.

Description

technical field [0001] The invention is an energy meter based on a natural gas thermophysical property-calorific value model. Background technique [0002] Energy metering is a measurement method in which natural gas calorific value is used as the settlement unit; natural gas energy metering is based on volumetric metering, while simultaneously measuring the calorific value of natural gas, and calculating the gas flow through the pipeline through the calorific value and volume per unit volume / mass The total energy of natural gas; according to "Determination of Natural Gas Energy (GB / T 22723-2008)", the determination of natural gas energy mainly includes three methods: direct measurement and indirect measurement; 1. The direct measurement method (such as combustion calorimeter) is through constant Flowing natural gas burns in excess air, and the released energy is transferred to the heat exchange medium to increase its temperature. The calorific value of the gas is directly r...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N21/3504G01N21/65
CPCG01N21/3504G01N21/65
Inventor仇亿王丽建崔超张玉佩陈慧云刘珂王杰陆雅婷
OwnerZHEJIANG MEASUREMENT SCI RES INST