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8. Calculation of pipeline pressures and dimensions. Gas is gathered at point A from gas processing plants B and C (see Figure 5-3), and transported to customers at D. The gas rates from plants B and C are 150 and 100 MMscf/d, respectively. The distances between BA, CA, and AD are 1,000 ft, 800 ft, and 10 miles, respectively. The diameters of pipelines CA and AD are 5 and 10 in., respectively. The pressure at destination D has to be 500 psi. Assume the temperature is 77°F in the whole process. The pipeline relative roughness is 0.001. All gas is methane. 1. What is the inlet pressure in the AD pipeline? 2. If gas from pipeline BA is injected into the main pipeline AD at the same pressure (BA outlet pressure = AD inlet pressure) and the inlet pressure at B has to be 1,240 psi, what should the diameter of pipeline BA be? 3. If the diameter of pipeline CA is 5 in., pressure at C is 1,000 psi. What is the outlet pressure at CA? To get CA gas stream injected to main stream AD at the same pressure as the inlet pressure of AD, how much pressure has to be boosted by a compressor? Lại 4 | | LAOI0 miles 150 MM/ DAY10 in PO) 300 MM/ LANCO De in Assume Temperatur 777 Relative roughness 0.001 Figure 5-3 Diagram for Example 5--1