En este nuevo Laboratorio en Casa, le enseñaremos como realizar una estufa u hornilla casera, hecha con materiales que fácilmente podemos encontrar en nuestro hogar. Esta estufa es excelente cuando estés de excursión y no tengas otro medio para calentar cualquier alimento. Inténtalo en casa, pero bajo la supervisión de un adulto responsable.
Materiales
- 2 latas de refresco
- 1 martillo
- 2 clavos
- 1 tijera de electricista
- 1 alicate (tenaza)
- 1 Navaja o exacto.
- Alcohol antiséptico (Alcohol isopropílico)
Procedimiento
- Cortar el círculo de la base de la lata con la navaja
- Toma una de las latas, y mide 4 cm de altura desde el borde antes de la base.
- Ahora con la segunda lata, mide 2 cm desde el borde antes de la base y córtala con mucho cuidado de no dañar el resto. Esa será la parte inferior o base de la estufa (parte 1).
- Toma lo que quedo restante de la lata 2, y corta la parte de la boca, a su vez ábrela de manera que te quede una franja de la lata. Cuya franja debe medir 4 cm de grosor y córtala.
- Con esta franja armarás un cilindro que calce en el círculo interno de la parte 2. Después que midas que cantidad de franja necesitas para formar el cilindro, abre en un extremo una abertura de arriba hacia abajo, y en el extremo opuesto una abertura de abajo hacia arriba, esto te permitirá calzar la franja entre sí y obtener el cilindro necesario. Ya obtenido el cilindro ábrele 2 aberturas en forma triangular en la parte baja, una delantera y otra abertura trasera. Esta será la parte interna de la estufa (parte 2).
Una vez obtenidas las 3 partes, es momento de armar la estufa.
- Coloca la parte 2 (con las aberturas hacia abajo) justo en el círculo interno de la parte 1. Luego calza la parte 3 sobre la 1 y 2 de manera que la parte 2 calce con el círculo o abertura superior de la 3.
- Una vez agrega 10 ml de alcohol antiséptico dentro de la estufa y con mucho cuidado enciende en la parte media.
- Deja calentar y reposar, hasta que se forme la llama.
- Coloca una parrilla para colocar la olla, si la colocas directamente a la lata, se caerá y no funcionará la estufa.
Resultado
Se enciende la parte media de la estufa, al pasar del tiempo la llama del medio se mantiene y empiece a formarse el fuego en cada uno de los orificios de la lata simulando el efecto de una estufa de cocina.
Pero, ¿por qué ocurre esto?
La estufa utiliza el alcohol antiséptico (químicamente alcohol isopropílico) como combustible para mantener encendida la llama, ya que esta sustancia es muy volátil, es decir, tiene baja presión de vapor y la facilidad de pasar de líquido a vapor espontáneamente (Vaporización), es decir, sin necesidad de ser calentada.
Al encender la parte central de la estufa no arde por completo porque se debe esperar que haya suficiente vapor del alcohol; al encender se está aplicando cierta cantidad de energía que calienta el alcohol y comienza a pasar de líquido a vapor aún más rápido (Evaporación). Cuando se forma suficiente vapor de alcohol, estos escapan por los orificios de nuestra estufa y son quemados por la llama central.
Sencillamente. . . .EXCELENTE. . .
Felicidades, está excelente.
Todo tiene un principio y poco a poco irá creciendo tu proyecto.
Me encantó.
esto nos puede servir cuando no tengamos gas ni electricidad o cuando estemos en la chacra
muchas gracias
Excelente y mas hitita en la situación que estamos viviendo aquí en Venezuela
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