UA_FROM_NTU

This function converts exchanger transfer units and minimum heat-capacity rate into overall conductance. It is the inverse of the standard NTU-from-UA relation.

The formula is UA=\mathrm{NTU}\,C_{min}.

Excel Usage

=UA_FROM_NTU(NTU, Cmin)

NTU (float, required): Thermal number of transfer units (-).
Cmin (float, required): Minimum heat capacity rate (W/K).

Returns (float): Area heat transfer coefficient product (W/K).

Example 1: UA from NTU example

Inputs:

NTU	Cmin
200	22

Excel formula:

=UA_FROM_NTU(200, 22)

Expected output:

4400

Example 2: UA for smaller NTU

Inputs:

NTU	Cmin
5	100

Excel formula:

=UA_FROM_NTU(5, 100)

Expected output:

500

Example 3: UA for larger NTU

Inputs:

NTU	Cmin
50	250

Excel formula:

=UA_FROM_NTU(50, 250)

Expected output:

12500

Example 4: UA for high capacity rate

Inputs:

NTU	Cmin
10	500

Excel formula:

=UA_FROM_NTU(10, 500)

Expected output:

5000

Python Code

Show Code

from ht.hx import UA_from_NTU as hx_UA_from_NTU

def UA_from_NTU(NTU, Cmin):
    """
    Calculate UA from NTU and the minimum heat capacity rate.

    See: https://ht.readthedocs.io/en/latest/ht.hx.html

    This example function is provided as-is without any representation of accuracy.

    Args:
        NTU (float): Thermal number of transfer units (-).
        Cmin (float): Minimum heat capacity rate (W/K).

    Returns:
        float: Area heat transfer coefficient product (W/K).
    """
    try:
        result = hx_UA_from_NTU(NTU=NTU, Cmin=Cmin)
        return result
    except Exception as e:
        return f"Error: {str(e)}"

Online Calculator

NTU *

Thermal number of transfer units (-).

Cmin *

Minimum heat capacity rate (W/K).