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Gas combustion heat measuring device and combustion heat measuring method utilizing the same

A technology of combustion heat and gas device, applied in the direction of measuring device, material heat development, instrument, etc., can solve the problem of lack of flow measurement verification and calibration ability, and achieve the effect of good application prospect, simple operation and reasonable structure

Inactive Publication Date: 2011-10-05
NAT INST OF METROLOGY CHINA
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Problems solved by technology

However, at present, my country has not yet established a large-flow national benchmark device, and lacks the ability to verify and calibrate flow measurement.

Method used

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  • Gas combustion heat measuring device and combustion heat measuring method utilizing the same
  • Gas combustion heat measuring device and combustion heat measuring method utilizing the same
  • Gas combustion heat measuring device and combustion heat measuring method utilizing the same

Examples

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Embodiment

[0063] The present invention is more specifically illustrated by the following examples, but the scope of the present invention is not limited thereto.

[0064] Measuring device for heat of combustion of flammable gases

[0065] Including an oxygen bomb calorimeter 10 and an air intake balance device 20:

[0066] Wherein, the oxygen bomb calorimeter 10 is the C4000 type oxygen bomb calorimeter produced by the German IKA company, and the oxygen bomb 11 bomb cover in the oxygen bomb calorimeter 10 is equipped with two valves 12 and 13;

[0067] The gas balance device 20 includes: a conventional vacuum pump 21 and a vacuum gauge 22, a conventional pressure gauge 23 and a rotameter 24, a three-stage bubbling saturator 25 for common use, a constant temperature water tank 26 for common use, an atmospheric balance bottle 27, and a conduit 28 .

[0068] Measuring the combustion heat of methane using the above-mentioned combustible gas combustion heat measuring device

[0069] 1. ...

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Abstract

The invention relates to a gas combustion heat measuring device and a combustion heat measuring method utilizing the same. The measuring device comprises an oxygen bomb calorimeter and a gas gathering balancing unit. The combustion heat measuring method comprises the following steps: filling combustible gas to be measured with a volume equal to an inner volume V of the oxygen bomb into the oxygen bomb through the gas gathering balancing unit; employing a direct combustion method to enable the combustible gas with a volume equal to the inner volume V of the oxygen bomb to combust directly in the oxygen bomb; calculating a combustion heat of the combustible gas by using a premeasured thermal capacity k of the oxygen bomb system and a temperature rise delta t generated during combustion of the combustible gas in the oxygen bomb according to a formula. The calorific value of the combustible gas is measured by employing a direct combustion method, so that measuring uncertainty is little and measured value can be directly traced to international system of units, besides the device with a reasonable structure is easy to operate, and has a promising application prospect. Therefore, natural gas trade settlement can be realized by metering energy.

Description

technical field [0001] The present invention relates to the measurement of heat of combustion, more specifically, to a device for measuring the heat of combustion of combustible gases (such as methane or natural gas) and a method for measuring the heat of combustion of combustible gases using the device. Background technique [0002] The heat of combustion (also known as calorific value) of a certain substance refers to the heat released by the complete combustion of a unit mass or unit volume of the substance. For example, for the calorific value of coal, the national standard stipulates that the high calorific value and low calorific value of coal are measured by the direct combustion method of the oxygen bomb calorimeter (see GB213-2008). As for flammable gas, since its volume cannot be measured, it is not possible to use an oxygen bomb calorimeter to measure its calorific value by direct combustion method. [0003] Natural gas is a natural, clean and non-renewable energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/28G01N30/02
Inventor 孙国华李佳王海峰孟凡敏
Owner NAT INST OF METROLOGY CHINA
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