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Measurement of gas flow rate utilizing ordinary cone-shaped pipe connector instead of purposely built and costly flow meter

IP.com Disclosure Number: IPCOM000247514D
Publication Date: 2016-Sep-13
Document File: 2 page(s) / 46K

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The IP.com Prior Art Database

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Title: Measurement of gas flow rate utilizing ordinary cone-shaped pipe connector

The measurement of flow rate (liquid or gas) in general requires flowmeters constructed and marketed by specialty companies. They are in many different sizes and shapes depending on kind of fluid, and range of flow rate. These flowmeters are individually accompanied by calibration parameters provided from the manufacturers which require these meters to be periodically recalibrated for accurate data acquisition. In general, these meters must be installed with extra sensors, including (1) differential pressure sensor, (2) absolute pressure sensor, (3) temperature sensor, (4) additional sensor such as humidity sensor if humid gas flow (mixed gas) is measured.

A method is proposed to use an ordinary cone pipe connector instead of purposely built and costly specialty sensors. This method is to be used requiring the same sensors (mentioned above) as specialty flow meter.

Method (using gas as flowing material)

Specialty sensor (for example, V-cone)                                                                                 Cone pipe connector

Following the identical principle, from the Bernoulli equation

Differential pressure sensor measures the following.           Then manipulate using the following equation

From measured quantities, differential pressure, absolute pressure, temperature, (humidity)

Step 1: calculate density from measured absolute pressure and temperature (if mixed gas such as humid gas, use humidity to calculate the density)

Step 2: divide the measured differential pressure by density calculated in step 1, then obtain square root of it

Step 3: multiply with the factor

Step 4: multiply with density from Step 1, and divide by density at STP

Only one additional “factor” in the step 3 above is needed to obtain the final standard flow rate.

One can see from the two equations above, the standard flow rate...