Consider a pumping system used in a cooling water loop. Water is drawn from a tank, which maintains a height of 2 m of water. It then enters the pump and then passes through the process heat exchanger, where it is heated. The water is then cooled back to cooling water temperature using a chiller (another heat exchanger). Finally, water exits the chiller and is circulated back to the original tank, forming a closed loop. All equipment is at ground level. All pipe in the system is 2-inch schedule 40, commercial steel pipe. a. If the flowrate is 15 kg/s, determine the Fanning friction factor in the pipe using the Colebrook Equation. b. At a flowrate of 15 kg/s, the heat exchanger and chiller each have a pressure drop of 15 kPa. Estimate the equivalent length of each heat exchanger. c. In addition to the heat exchangers and 35 m of straight pipe, there are the following valves and fittings: 90° elbows Tee Open gate valve Swing check valve x 6 x2 x6 x1 If the flowrate is 15 kg/s, determine the work required (in kW) for a 75% efficient pump. You may ignore entrance and exit effects.

Consider a pumping system used in a cooling water loop. Water is drawn from a tank, which maintains a height of 2 m of water. It then enters the pump and then passes through the process heat exchanger, where it is heated. The water is then cooled back to cooling water temperature using a chiller (another heat exchanger). Finally, water exits the chiller and is circulated back to the original tank, forming a closed loop. All equipment is at ground level. All pipe in the system is 2-inch schedule 40, commercial steel pipe. a. If the flowrate is 15 kg/s, determine the Fanning friction factor in the pipe using the Colebrook Equation. b. At a flowrate of 15 kg/s, the heat exchanger and chiller each have a pressure drop of 15 kPa. Estimate the equivalent length of each heat exchanger. c. In addition to the heat exchangers and 35 m of straight pipe, there are the following valves and fittings: 90° elbows Tee Open gate valve Swing check valve x 6 x2 x6 x1 If the flowrate is 15 kg/s, determine the work required (in kW) for a 75% efficient pump. You may ignore entrance and exit effects.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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