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Question 4. High Pressure Hot Water and Centrifugal pumps. Question 4 Section A: (i) Briefly discuss why it is important to use an anti-flash margin in high pressure hot water systems. (To obtain full marks, use the concepts of saturation pressure, saturation temperature, working pressure and working temperature to elaborate your answer). Page 5 of 7 (ii) Briefly explain two (02) negative effects of suction cavitation on centrifugal pump system performance. (Simply listing the effects will not be sufficient. You are expected to explain why the effects you chose are seen as negative effects of suction cavitation). (iii) An engineer can specify the design flow rate and the design head for a centrifugal pump system by plotting the pump curve and the system curve on the same graph to obtain the operating point. Using suitable sketches, briefly discuss what will happen to the operating point (and the design values) under the following two situations: (a) Decreasing the rotational speed of the pump. (b) Rust and limescale building up inside the pipes used in the suction side of the pumping system.

Question 4. High Pressure Hot Water and Centrifugal pumps. Question 4 Section A: (i) Briefly discuss why it is important to use an anti-flash margin in high pressure hot water systems. (To obtain full marks, use the concepts of saturation pressure, saturation temperature, working pressure and working temperature to elaborate your answer). Page 5 of 7 (ii) Briefly explain two (02) negative effects of suction cavitation on centrifugal pump system performance. (Simply listing the effects will not be sufficient. You are expected to explain why the effects you chose are seen as negative effects of suction cavitation). (iii) An engineer can specify the design flow rate and the design head for a centrifugal pump system by plotting the pump curve and the system curve on the same graph to obtain the operating point. Using suitable sketches, briefly discuss what will happen to the operating point (and the design values) under the following two situations: (a) Decreasing the rotational speed of the pump. (b) Rust and limescale building up inside the pipes used in the suction side of the pumping system.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Question 4. High Pressure Hot Water and Centrifugal pumps. Question 4 Section A: (i) Briefly discuss why it is important to use an anti-flash margin in high pressure hot water systems. (To obtain full marks, use the concepts of saturation pressure, saturation temperature, working pressure and working temperature to elaborate your answer). Page 5 of 7 (ii) Briefly explain two (02) negative effects of suction cavitation on centrifugal pump system performance. (Simply listing the effects will not be sufficient. You are expected to explain why the effects you chose are seen as negative effects of suction cavitation). (iii) An engineer can specify the design flow rate and the design head for a centrifugal pump system by plotting the pump curve and the system curve on the same graph to obtain the operating point. Using suitable sketches, briefly discuss what will happen to the operating point (and the design values) under the following two situations: (a) Decreasing the rotational speed of the pump. (b) Rust and limescale building up inside the pipes used in the suction side of the pumping system.
Transcribed Image Text:Question 4. High Pressure Hot Water and Centrifugal pumps. Question 4 Section A: (i) Briefly discuss why it is important to use an anti-flash margin in high pressure hot water systems. (To obtain full marks, use the concepts of saturation pressure, saturation temperature, working pressure and working temperature to elaborate your answer). Page 5 of 7 (ii) Briefly explain two (02) negative effects of suction cavitation on centrifugal pump system performance. (Simply listing the effects will not be sufficient. You are expected to explain why the effects you chose are seen as negative effects of suction cavitation). (iii) An engineer can specify the design flow rate and the design head for a centrifugal pump system by plotting the pump curve and the system curve on the same graph to obtain the operating point. Using suitable sketches, briefly discuss what will happen to the operating point (and the design values) under the following two situations: (a) Decreasing the rotational speed of the pump. (b) Rust and limescale building up inside the pipes used in the suction side of the pumping system.
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