Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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**Title: Understanding Pressure Drop in Solar Water Heaters**

**Description:**

This educational resource explores the pressure dynamics in a solar water heater system. The heater, mounted on a roof, includes two flat plates. The system allows water to enter at point **A** and exit at point **B**. The average temperature of the water is assumed to be 45°C.

**Diagram Explanation:**

- The illustration shows a side view of the solar heater setup.
- The plates are inclined at an angle of 5° relative to the horizontal plane.
- The length of the plates is labeled as 2 meters.
- The gap between the plates is specified as 1.38 mm.

**Task:**

- **Objective:** Determine the maximum allowable pressure drop (\( \Delta P_{\text{max}} \)) from point **A** to point **B** while ensuring the flow remains laminar.
  
**Attempts and Responses:**

1. **First Attempt:** 
   - Submitted: \( \Delta P_{\text{max}} = 2329.45 \, \text{Pa} \) 
   - Result: Incorrect, with a 3% deduction.

2. **Second Attempt:** 
   - Submitted: \( \Delta P_{\text{max}} = 2.329 \, \text{kPa} \)
   - Result: Incorrect, with a 3% deduction.

3. **Third Attempt:** 
   - Submitted: \( \Delta P_{\text{max}} = 3722.192 \, \frac{N}{m^2} \)
   - Result: Incorrect, with a 3% deduction.

Participants are encouraged to calculate carefully and check their units and significant figures when submitting their answers. Providing feedback and asking for hints can assist in achieving the correct solution.
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Transcribed Image Text:**Title: Understanding Pressure Drop in Solar Water Heaters** **Description:** This educational resource explores the pressure dynamics in a solar water heater system. The heater, mounted on a roof, includes two flat plates. The system allows water to enter at point **A** and exit at point **B**. The average temperature of the water is assumed to be 45°C. **Diagram Explanation:** - The illustration shows a side view of the solar heater setup. - The plates are inclined at an angle of 5° relative to the horizontal plane. - The length of the plates is labeled as 2 meters. - The gap between the plates is specified as 1.38 mm. **Task:** - **Objective:** Determine the maximum allowable pressure drop (\( \Delta P_{\text{max}} \)) from point **A** to point **B** while ensuring the flow remains laminar. **Attempts and Responses:** 1. **First Attempt:** - Submitted: \( \Delta P_{\text{max}} = 2329.45 \, \text{Pa} \) - Result: Incorrect, with a 3% deduction. 2. **Second Attempt:** - Submitted: \( \Delta P_{\text{max}} = 2.329 \, \text{kPa} \) - Result: Incorrect, with a 3% deduction. 3. **Third Attempt:** - Submitted: \( \Delta P_{\text{max}} = 3722.192 \, \frac{N}{m^2} \) - Result: Incorrect, with a 3% deduction. Participants are encouraged to calculate carefully and check their units and significant figures when submitting their answers. Providing feedback and asking for hints can assist in achieving the correct solution.
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