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The diameter of the selected impeller is Geometric Ratios below. 1) Not know. None of the above 2) Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Geometric Ratio Allowed Range 0.14-0.5 0.17 0.4 D/T (radial) D/T (axial) H/D (either) H/T (axial) 2-4 0.34-1.6 m based on the allowable range of

The diameter of the selected impeller is Geometric Ratios below. 1) Not know. None of the above 2) Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Geometric Ratio Allowed Range 0.14-0.5 0.17 0.4 D/T (radial) D/T (axial) H/D (either) H/T (axial) 2-4 0.34-1.6 m based on the allowable range of

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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**Geometric Ratios for Impeller Design** The diameter of the selected impeller is ______ m based on the allowable range of Geometric Ratios below. 1) Not know. 2) None of the above 3) 2.7 4) 1.8 5) 1.0 **Geometric Ratios Table:** | Geometric Ratio | Allowed Range | |-------------------|----------------| | D/T (radial) | 0.14 – 0.5 | | D/T (axial) | 0.17 – 0.4 | | H/D (either) | 2 – 4 | | H/T (axial) | 0.34 – 1.6 | | H/T (radial) | 0.28 – 2 | | B/D (either) | 0.7 – 1.6 | **Symbols and Definitions:** - **D** = impeller diameter - **T** = equivalent tank diameter - **H** = water depth - **B** = water depth below impeller
Transcribed Image Text:**Geometric Ratios for Impeller Design** The diameter of the selected impeller is ______ m based on the allowable range of Geometric Ratios below. 1) Not know. 2) None of the above 3) 2.7 4) 1.8 5) 1.0 **Geometric Ratios Table:** | Geometric Ratio | Allowed Range | |-------------------|----------------| | D/T (radial) | 0.14 – 0.5 | | D/T (axial) | 0.17 – 0.4 | | H/D (either) | 2 – 4 | | H/T (axial) | 0.34 – 1.6 | | H/T (radial) | 0.28 – 2 | | B/D (either) | 0.7 – 1.6 | **Symbols and Definitions:** - **D** = impeller diameter - **T** = equivalent tank diameter - **H** = water depth - **B** = water depth below impeller
As a process engineer, you are designing a new drinking water treatment plant using a conventional treatment process. The design includes **Two Trains of Flocculators** as follows: - **Design Flow:** 0.35 m³/s. - **Average Temperature:** The average temperature of the water is 5°C with a dynamic viscosity of \( \mu = 1.519 \times 10^{-3} \, \text{Pa·s} \) and \( \rho = 999.967 \, \text{kg/m}^3 \). - **Major Target:** The primary goal of the water treatment plant (WTP) is to remove color from the water using alum as a coagulant. The product of the velocity gradient (G) and the detention time (\(\theta\)), \( G_{Avg} \theta \), should be equal to 120,000. - **Flocculator Design:** Each train of flocculators includes three compartments of the same size in series with the following tapered velocity gradients: - G = 80, 50, and 20 s⁻¹. - **Compartment Dimensions:** The length, width, and depth are equal for each compartment. - **Impeller Type:** The impeller is of the axial-flow type with three blades. - **Impeller Diameters:** The available impeller diameters are 1.0 m, 1.8 m, and 2.7 m. - **Water Depth below Impeller:** The water depth below the impeller, \( B \), is one-third of the total water depth, \( H \). Therefore, \( B = \frac{1}{3} H \). This detailed design approach ensures efficient mixing and flocculation, critical for effective water treatment and color removal.
Transcribed Image Text:As a process engineer, you are designing a new drinking water treatment plant using a conventional treatment process. The design includes **Two Trains of Flocculators** as follows: - **Design Flow:** 0.35 m³/s. - **Average Temperature:** The average temperature of the water is 5°C with a dynamic viscosity of \( \mu = 1.519 \times 10^{-3} \, \text{Pa·s} \) and \( \rho = 999.967 \, \text{kg/m}^3 \). - **Major Target:** The primary goal of the water treatment plant (WTP) is to remove color from the water using alum as a coagulant. The product of the velocity gradient (G) and the detention time (\(\theta\)), \( G_{Avg} \theta \), should be equal to 120,000. - **Flocculator Design:** Each train of flocculators includes three compartments of the same size in series with the following tapered velocity gradients: - G = 80, 50, and 20 s⁻¹. - **Compartment Dimensions:** The length, width, and depth are equal for each compartment. - **Impeller Type:** The impeller is of the axial-flow type with three blades. - **Impeller Diameters:** The available impeller diameters are 1.0 m, 1.8 m, and 2.7 m. - **Water Depth below Impeller:** The water depth below the impeller, \( B \), is one-third of the total water depth, \( H \). Therefore, \( B = \frac{1}{3} H \). This detailed design approach ensures efficient mixing and flocculation, critical for effective water treatment and color removal.
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