Effectiveness Of Parallel-Flow Heat Exchanger If Cold Fluid Is Minimum Fluid Calculator

Formula Used:

\[ \varepsilon_c = \frac{T_{co} - T_{ci}}{T_{hi} - T_{ci}} \]

Outlet Temperature of Cold Fluid (Tco):

Inlet Temperature of Cold Fluid (Tci):

Inlet Temperature of Hot Fluid (Thi):

Effectiveness of HE when Cold Fluid is Min Fluid (εc):

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1. What is the Effectiveness of Parallel-Flow Heat Exchanger?

The effectiveness of a parallel-flow heat exchanger when cold fluid is the minimum fluid is a measure of how well the heat exchanger transfers heat between the two fluids. It represents the ratio of actual heat transfer to the maximum possible heat transfer.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \varepsilon_c = \frac{T_{co} - T_{ci}}{T_{hi} - T_{ci}} \]

Where:

\( \varepsilon_c \) — Effectiveness of HE when Cold Fluid is Min Fluid
\( T_{co} \) — Outlet Temperature of Cold Fluid (K)
\( T_{ci} \) — Inlet Temperature of Cold Fluid (K)
\( T_{hi} \) — Inlet Temperature of Hot Fluid (K)

Explanation: This formula calculates the effectiveness based on temperature differences when the cold fluid has the minimum heat capacity rate.

3. Importance of Effectiveness Calculation

Details: Calculating heat exchanger effectiveness is crucial for evaluating heat exchanger performance, optimizing thermal systems, and ensuring efficient energy transfer in various industrial applications.

4. Using the Calculator

Tips: Enter all temperature values in Kelvin. Ensure that the inlet temperature of hot fluid is greater than the inlet temperature of cold fluid for valid calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the range of effectiveness values?
A: Effectiveness values range from 0 to 1, where 0 indicates no heat transfer and 1 indicates maximum possible heat transfer.

Q2: When is cold fluid considered the minimum fluid?
A: Cold fluid is the minimum fluid when its heat capacity rate (mass flow rate × specific heat) is less than that of the hot fluid.

Q3: How does parallel-flow differ from counter-flow configuration?
A: In parallel-flow, both fluids enter at the same end and flow in the same direction, while in counter-flow, fluids enter at opposite ends and flow in opposite directions.

Q4: What factors affect heat exchanger effectiveness?
A: Effectiveness depends on the heat exchanger geometry, flow arrangement, heat transfer coefficients, and fluid properties.

Q5: Can this formula be used for other heat exchanger types?
A: This specific formula applies to parallel-flow heat exchangers when cold fluid is the minimum fluid. Different formulas exist for other configurations.