Calculate the percent uncertainty in flow rate

Reference no: EM131310826

Calculate the percent uncertainty in flow rate for the venturi measurements in Prob. 7.63 using the same uncertainties in the pressure and temperature measurements as in Prob. 7.62.

Prob. 7.63

The airflow system in Prob. 7.60 is measured with a venturi having like dimensions as the orifice, i.e., the same pipe diameter and throat diameter. Calculate the flow rate in kg/s for the same pressure and temperature measurements as in Prob. 7.60.

Prob. 7.60

An orifice is installed according to ASME specifications in a 5.0-cm-diameter pipe. The diameter of the orifice is 2.5 cm and the pressure taps are one diameter upstream and one-half diameter down-stream. Amano meter is used to measure the orifice pressure differential as 1932 mmH2O and the upstream pressure is measured as 400 kPa gage pressure with the local barometer reading as 750 mmHg. The fluid is air at a temperature of 27?C. Calculate the airflow rate in kg/s.

Prob. 7.62

Suppose the flow system in Probs. 7.60 and 7.61 is fluctuating such that the differential pressure varies over a range of ±12 mmH2O while the inlet pressure fluctuates by ±10 kPa. The temperature measurement is within ±2?C. Calculate the resultant uncertainties in the flow rates expressed as a percent of the calculated values.

Probs. 7.61

The orifice in Prob. 7.60 is used to measure the same airstream and the differential pressure reading is observed as 190 mm with all other readings the same. What is the airflow under these conditions?

Reference no: EM131310826

Questions Cloud

What are the two main factors that dictate climate : Give a specific example of an animal's ability to physiologically adapt to different environments. Place the 5 main groups of vertebrates in evolutionary order. What are the two main factors that dictate climate

Explain the mass transfer coefficient for a gas stream : Predict the variables that are necessary to explain the mass-transfer coefficient for a gas stream flowing over a flat plate and arrange these variables into dimensionless groups.

Identify the types of epidemiology studies that are used : Identify the types of epidemiology studies that are used to prove that a given substance resulted in changes in human health.

What documents will you need to review to accomplish : What documents will you need to review to accomplish this analysis? What issues must you be aware of that might taint the quality of the documents you review?

Calculate the percent uncertainty in flow rate : Calculate the percent uncertainty in flow rate for the venturi measurements in Prob. 7.63 using the same uncertainties in the pressure and temperature measurements as in Prob. 7.62.

Should any other variables have been included : In a mass-transfer spray column, a liquid is sprayed into a gas stream, and mass is transferred between the liquid and gas phases.- Arrange these variables in dimensionless groups. Should any other variables have been included?

What are the strengths of this technique : Identify one or more of the data collection techniques discussed in units 7, 8, and/or 9 that might be appropriate for your study.What are the strengths of this technique(s)?What are the weaknesses of this technique(s)?If weaknesses, how might you ..

How you allocated your cash within each position : Discuss your stock performance for your portfolio and how you allocated your cash within each position within the constraints above. Discuss your philosophy and process.

What is the uncertainty of the billing : The meter itself senses actual volume flow. What factor must be multiplied by the actual volume flow to give SCFM?

User Account

All Pages