クッカーの効率について

クッカーの効率を調べるには、炎を一定にして沸騰までの時間を測定すればよいが、炎を一定にしたつもりでも、気化時の冷却でゆっくりと炎が小さくなることに気づいた。これを線形的な変化とすると、系統誤差を相殺するように、沸騰実験をすれば、何とかなるかと思った。つまり、クッカーA, Bに対して、ABA, BABと実験すれば良い。簡便のため、水は500mlとし、簡単な温度計を入れ、目視で沸騰を判断した。誤差は20-30秒ある。

In order to clarify  the efficiency of the cooker, I had thought that it was easy to measure the boiling time while maintained the flame constant. But I have noticed that  flame becomes smaller slowly by cooling at the time of evaporation of the gas. If this change was linear, I can carry out the boiling offset experiment so that the systematic error might be canceled. That is, boiling experiment of cooker A, B consist of ABA, BAB series. To put it simple, water was 500 ml, the easy thermometer was put in, and boiling time was judged visually. There may be 20 to 30 seconds of errors.


沸騰実験の結果　クッカーと沸騰時間を示す。

The result of boiling experiment, cookers and boiling times were indicated

(1) 1.8L cooker, 3.5minutes --- Outback Oven, 4.5 minutes --- 1.8L cooker, 4.5 minutes
(2) Outback Oven, 4.5 minutes --- 1.8 L cooker, 4.2 minutes --- Outback Oven, 5.5 minutes

推定沸騰時間は
The estimated boiling times are

  1.8 L cooker   ---> ( 3.5 + 4.5 + 4.2  ) / 3 = 4.07 minutes
  Outback Oven --->( 4.5 + 4.5 + 5.5 ) / 3 = 4.83 minutes
  4.83 / 4.07 = 1.19

 Outback Ovenは1.8 L cookerと比較して20%くらい余計に燃料が必要。
 Outback Oven needs 1.2 times fuel as compared to the 1.8 L cooker


1.8L cooker と3L cookerを比較するために、もう一度、実験した。
The second experiment to compare 1.8 L cooker and 3 L cooker


(1) 1.8 L cooker, 3.7 minutes --- 3 L cooker, 4 minutes --- 1.8 L cooker, 4.5 minutes

ここでやる気がなくなり、中止した。
I stopped the experiment

ここからは、
Because

1.8L cooker ---> ( 3.7 + 4.5 ) / 2 = 4.1 minutes
 3L cooker  = 4.0 minutes

となる。つまり、3L cookerは効率が悪いと思っていたが、思い込みのようだ。実質的に効率は同程度だろうと推測される。

Essentially,  the fuel efficiency of  1.8 L cooker and  3 L cooker is equal. I had thought the efficiency of 3 L cooker was inferior to 1.8 L cooker. But this thought was wrong.

なお、火は中火、フタをして沸騰実験を行った。Outback Ovenにパーカを付けると効率はかなり上昇し、1.8L cookerと同程度となる。

The experiments were carried out with lid and middle flame.  When the Outback Oven was covered by Pot Parka, its fuel efficiency was drastically improved.