
太陽熱利用(1)、2018年夏、豪雨による断水時の思い出 Utilization of solar heat (1), Memories of when water was cut off due to torrential rains in summer,2018
6年前の夏、豪雨で尾道市が長期に断水した時、私たちは実家の井戸水でしのぎました。
夏の初めで風呂やシャワーが必要な時期でもあり、井戸水の温水化には発泡スチロールの箱(断熱性は抜群)に水を張り、その上に黒いビニールシートを浮かべて太陽熱を集熱して温水にしました。
この方法で十分な温度の温水を必要量使用できましたが、念のために水の浄化には写真のような簡易浄水器を作っていました。(添付写真参照)
現在は真空式の集熱管を使った製品があります。(添付写真参照)
少なくとも夏の間は超簡易的な方法で太陽熱を利用し、地球温暖化や気候変動原因となっているガスや電気を利用しないで、温水を作ることは可能な訳です。

Simple water heater and simple filter
In summer 6 years ago, when the city of Onomichi was cut off from water for a long period of time due to torrential rains, we made do with well water from my parents' home.
It was the beginning of summer and we needed to take baths and showers. To heat the well water, we filled a styrofoam box (with excellent insulation) with water and floated a black plastic sheet on top of it to collect sun heat to make hot water.
With this method, we were able to use the necessary amount of hot water with sufficient temperature for showers, etc. But just to be safe, we built a simple water purifier like the one shown in the photo to purify the water.
Now, there are products using vacuum type heat collector tubes. (See attached photo)
So at least during the summer months it is possible to use solar heat in a very simple way to produce hot water without using gas or electricity, which are causes of global warming and climate change.

Hot water heater products using vacuum-type heat collector tubes