Gas Flowmeters

MINISTRY OF EDUCATION AND SCIENCES OF UKRAINE NATIIntegrated Complexes Subject Gas Flowmeters Student of group FCS 312. The chief Suchenko O.A Kiev 2005 Contents 1. Introduction 2. Volumetric expense and volumetric flow meters. 3. What is the mass flow rate of gas 4. Mass flowmeters. 5. The principle of thermal mass flowmeter operation. 6. Types of the gas flowmeter-counters. ь Turbine gas counter ь . Rotational gas counters ь Vortex flowmeter-counter ь Super sound gas flowmeter-counters ь Membrane gas counter ь Jet gas counters ь Drum gas counter 7. The standard means for gas expense measurement 8. Calculation list 9. Calculation and selection of the restriction device. 10. Selection of the restriction device 11. Electrical scheme of the flowmeter 12. Conclusions 13. Literature 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 5 Introduction Modern level of thermal power engineering, aviation and rocket techniques, chemical, gas production and other branches of industry development requires the introduction of high-accurate tools of gas flow. There are about 200 constructions of flowmeters that are based on different physical principles.

The flowmeter in techniques is such a devise that measures the flow expense of the volume or the medium surrounding mass weight that flow through the device during the time unit. It is used for control and estimation of liquid, gas or vapor during its production, absence, usage and storage.

Also it is used for regulation of technological and thermal power engineering processes in automatic control systems.

Flowmeter that operate during an arbitrary time period are called the counters of liquid or gas. They can be used as independent devices or they can be included in the measuring node of топливо-маслораздаточной column etc. Sometimes the flowmeters are complicated by integrators- the devices for summation of measured weights and volumes. The matter quantity that passes through the pipeline per time unit is called the expense.

Depending on the properties of the technological process and the substance state there are volumetric and mass expense. ь

Volumetric expense and volumetric flow meters

The second class of the volumetric flow meters can be represented by t... The wide extension among the volumetric flowmeters the tachometric has... They have the primary element, and it s rotation speed is proportional... The vortex precession case looks like the Ventura tube. This motion is called the vortex precession.

What is the mass flow rate of gas

We got used to think and to work with gases using volumetric units lit... Such a cylinder places 1 liter of air under normal condition almost 1 ... The expense that is measured with the help of any volumetric flowmeter... If we will move the piston on the half-width to the cylinder bottom, t... Due to this the actual heat content will be represented more accurate.

The principle of thermal mass flowmeter operation

The principle of thermal mass flowmeter operation. The main elements o... Also the formation of the turbulent mode of the gas flow arises. Due t... The height of the s-turbine as a rule doesn t exceed 25-30 of the radi... For the explosion hazard of the counter the power supply of the block ... Any direction of the gas through the counter, absence of the treatment...

The standard means for gas expense measurement

Average excessive pressure.. Average temperature, С . The mechanical method is based on the displacement of the gas from the... Minimal expense . 5.

Calculation list

2. 1. 3. Relative humidity in the unit share. TypeСапфир.

Calculation and selection of the restriction device

Calculation and selection of the restriction device. This choice is done by the following conditions 1 The given pressure o... 2. The strict observance of the coaxial alignment between the pipeline an... The construction of the restriction device and the method of its housi...

Electrical scheme of the flowmeter

Electrical scheme of the flowmeter. Due to action of the magnetic field the pontoon takes the central plac... The device takes the energy from the ferroresonanse stabilizer FSN of ... In the first stage of the switch P1 by the change of the resistor R7 t... Figure 5.

Conclusions

Conclusions In the given course work the gaseous flowmeters were researched.

Here you can find the information about the principle of action, main characteristics, advantages, electrical-principle scheme and all other information that is specified to this topic. The calculated results are quietly coinciding with the real ones.

Literature

Literature. 3. Маковский. Шевцов, Справочник по поверке и наладке приборов. 12.