# Análisis 43: Balance energético para obtener el coeficiente de exceso de aire

{% hint style="info" %}
En una cámara de combustión se quema un hidrocarburo gaseoso formado según la composición volumétrica: CH<sub>4</sub> (75.68 %); C<sub>2</sub>H<sub>6</sub> (11.15 %); CO<sub>2</sub> (5.2 %); C<sub>3</sub>H<sub>8</sub> (4.70 %); C<sub>4</sub>H<sub>10</sub> (2.36 %); N<sub>2</sub> (0.91 %)

Sabiendo que aire seco (21.25 kg/s) y el combustible entran a 25 ºC y 100 kPa, siendo la mezcla pobre, y los humos salen a 727 ºC y 100 kPa. El calor cedido al medio ambiente es 345 kJ/mol de combustible.

Determinar:

1. Coeficiente de exceso de aire suponiendo una combustión pobre
2. Productos de la combustión en base seca y húmeda
3. Temperatura de rocío de los productos de combustión
4. Poderes caloríficos, superior e inferior
5. Eficiencia de la combustión
6. Irreversibilidad
7. Diagrama de Ostwald
8. Diagrama de Kissel
   {% endhint %}

![](https://thermosuite.com/manual/43/media/image2.png) ![](https://thermosuite.com/manual/43/media/image3.png)

<figure><img src="/files/ZuN6XOVKiOdtU1mLH3tj" alt=""><figcaption></figcaption></figure>

![](https://thermosuite.com/manual/43/media/image4.png)

![](https://thermosuite.com/manual/43/media/image5.png)

![](https://thermosuite.com/manual/43/media/image6.png) ![](https://thermosuite.com/manual/43/media/image7.png)

Conocida la temperatura de los humos de combustión y el calor evacuado al ambiente, mediante un balance energético (proceso iterativo), es calculado el coeficiente de exceso de aire.

![](https://thermosuite.com/manual/43/media/image8.png) ![](https://thermosuite.com/manual/43/media/image9.png)

![](https://thermosuite.com/manual/43/media/image10.png)

![](https://thermosuite.com/manual/43/media/image11.png)

![](https://thermosuite.com/manual/43/media/image12.png)

![](https://thermosuite.com/manual/43/media/image13.png) ![](https://thermosuite.com/manual/43/media/image14.png)

![](https://thermosuite.com/manual/43/media/image15.png)

![](https://thermosuite.com/manual/43/media/image16.png)

![](https://thermosuite.com/manual/43/media/image17.png) ![](https://thermosuite.com/manual/43/media/image18.png)

![](https://thermosuite.com/manual/43/media/image19.png)

![](https://thermosuite.com/manual/43/media/image20.png)

![](https://thermosuite.com/manual/43/media/image21.png)

![](https://thermosuite.com/manual/43/media/image22.png)

![](https://thermosuite.com/manual/43/media/image23.png)

![](https://thermosuite.com/manual/43/media/image24.png)

![](https://thermosuite.com/manual/43/media/image25.png) ![](https://thermosuite.com/manual/43/media/image26.png)

![](https://thermosuite.com/manual/43/media/image27.png)

![](https://thermosuite.com/manual/43/media/image28.png)

![](https://thermosuite.com/manual/43/media/image29.png) ![](https://thermosuite.com/manual/43/media/image30.png)

![](https://thermosuite.com/manual/43/media/image31.png)

![](https://thermosuite.com/manual/43/media/image32.png)

![](https://thermosuite.com/manual/43/media/image33.png)

![](https://thermosuite.com/manual/43/media/image34.png)

![](https://thermosuite.com/manual/43/media/image35.png) ![](https://thermosuite.com/manual/43/media/image36.png)

![](https://thermosuite.com/manual/43/media/image37.png)

![](https://thermosuite.com/manual/43/media/image38.png) ![](https://thermosuite.com/manual/43/media/image39.png)

![](https://thermosuite.com/manual/43/media/image40.png)

![](https://thermosuite.com/manual/43/media/image41.png)


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