Shown below is a heat exchanger used to cool down the liquid in the tube. The shell is well insulated. (1) If the tube is selected as the system, select
Shown below is a heat exchanger used to cool down the liquid in the tube. The shell is well insulated. (1) If the tube is selected as the system, select
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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Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
Question
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Shown below is a heat exchanger used to cool down the liquid in the tube. The shell is well insulated.
(1) If the tube is selected as the system, select the correct energy balance equation._____________
A. B. C. D.

Transcribed Image Text:**Heat Exchanger System Analysis**
This image depicts a heat exchanger utilized for cooling the liquid flowing through a tube. The system ensures that the surrounding shell remains well insulated.
**Diagram Details:**
The diagram shows a shell and tube configuration with the following flow paths:
- Inlet (1) into the shell and outlet (2) from the shell for the cooling medium
- Inlet (3) into the tube and outlet (4) from the tube for the liquid being cooled
Flow is directed with arrows, indicating the liquid's movement from the inlet to the outlet within the tube system. The primary objective is to transfer heat from the liquid in the tube to the surrounding shell.
**Question for Analysis:**
1. When considering the tube as the system, identify the correct energy balance equation.
**Options for the Energy Balance Equation:**
- **A.** \( \dot{m}_3 h_3 + \dot{Q} = \dot{m}_4 h_4 \)
- **B.** \( \dot{m}_1 h_1 = \dot{m}_2 h_2 + \dot{Q} \)
- **C.** \( \dot{m}_3 h_3 = \dot{m}_4 h_4 + \dot{Q} \)
- **D.** \( \dot{m}_1 h_1 + \dot{Q} = \dot{m}_2 h_2 \)
In these equations, \(\dot{m}\) denotes mass flow rate, \(h\) represents specific enthalpy at respective inlets and outlets, and \(\dot{Q}\) indicates the rate of heat transfer.
The correct energy balance equation must account for the conservation of energy within the tube, considering mass flow rates and corresponding changes in specific enthalpy.
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