"Okay, by the way, ice made directly from saltpeter is not edible. Don't use that basin of ice to make smoothies. If you want to eat it, make ice through a bucket."
"I know this, okay? I'm not that stupid!"
After hanging up the video, Xu Xin couldn't wait to try it out. He filled a basin with water and placed the blue saltpeter in it. Immediately, the water froze at a visible speed. At the same time, a chill emerged, and the surrounding temperature dropped instantly, causing Xu Xin to shudder.
The saltpeter was frozen in the ice without any change in shape.
"This...this is too powerful!" Xu Xin was a little shocked.
He immediately changed his idea of making a refrigerator.
What kind of refrigerator is this? He could use these two pieces of saltpeter to make an ice cellar! With an ice cellar, he could store large amounts of mutant beast meat and other food, which would be equivalent to a small granary!
He quickly began to plan the ice cellar in his mind.
To build an ice cellar, you need to first lower the temperature inside the ice cellar and then place the ice cubes inside.
The ice cellars of the ancients were actually quite simple. In winter, they would chisel large chunks of ice and put them into the cellar. Because the cellar was underground, it had a strong ability to maintain temperature. So in the summer, the ice would basically not melt, and the cellar would always maintain a low temperature. This was an ice cellar.
It was summer, and there was no natural ice available, so he needed saltpeter to cool down and make ice. Ordinary saltpeter was difficult to achieve, as the amount required to cool the surrounding area and make a large amount of ice was too great. However, his two blue-grade saltpeter blocks were more than sufficient.
What he needed to consider now was where to build an ice cellar. Generally speaking, ice cellars were built underground. There was no ventilation or light, so little heat could be conducted into the underground, which was the only way to preserve ice for a long time.
But if it is set up underground, he will have to go down from the tree house every time he goes to the ice cellar to get something. It would be very troublesome if something happens that prevents him from leaving the tree house, or if the cellar is flooded by a flood.
So Xu Xin planned to build an ice cellar on the first floor of the tree house.
It's not just because it's convenient, but he actually discovered very early on that the floor of the tree house has heat insulation capabilities.
His furnace was placed in the corner of the second floor of the tree house. Every time he used the furnace, the high-temperature flame inside would emit very strong heat. You know, the flame for melting iron blocks is over 1,500 degrees. Whenever the furnace was running, he would try to stay away from the furnace unless he was going to get materials.
When he used the furnace on the second floor to smelt ore and sand for a long time, the temperature near the furnace was ridiculously high. Especially now that the ambient temperature was not low, the entire second floor was like a high-temperature sauna.
According to common sense, the third floor should also be like a steamer. But no, the floor of the third floor is still cool, and only the area near the stairs is slightly affected.
Therefore, it is entirely feasible to use the first floor of a tree house as an ice cellar, provided that the tree house floor and walls are insulated.
Xu Xin immediately began to renovate the first floor of the tree house.
The ice cellar doesn't need to be as big as the entire first floor. There's no need for that. Xu Xin divided the first floor into two parts. He separated the inner half and used it as an ice cellar.
He covered the windows with wooden shutters to prevent sunlight from entering, and the entire room became a dark, enclosed and insulated environment.
Xu Xin filled a huge wooden barrel with water, placed it in the room that was about to become an ice cellar, and threw a piece of saltpeter directly into it.
The moment the saltpeter sank into the water, the water surface made a crackling sound and froze directly. The saltpeter was frozen near the water surface. At the same time, the water in the wooden barrel was gradually frozen, and a bone-chilling coldness emanated from the barrel.
"Crack!" The ice that expanded after the wooden barrel was frozen burst directly, and wood chips fell all over the ground. At the same time, Xu Xin felt the temperature in the entire room drop sharply within half a minute, falling directly from 30 degrees to a few degrees, which had reached the temperature of the refrigerator's refrigerator compartment.
"The heat absorption capacity of this blue-grade saltpeter is too strong, and it has not been consumed at all!" Xu Xin looked at the saltpeter frozen on the ice surface, took out a pickaxe and chiseled it out. This piece of blue-grade saltpeter still maintained its original appearance, and it was probably just dissolved with a layer of skin that was invisible to the naked eye.
Even if it all dissolves, it's fine; it can be precipitated and reused. This blue saltpeter is so convenient!
Continue to repeat this action. After the third bucket of water is frozen, the temperature in the entire ice cellar is already very cold, at least below minus ten degrees Celsius. Combined with the three pieces of ice made from saltpeter, which are at a lower temperature, the temperature is maintained. The entire ice cellar is basically completed.
Xu Xin couldn't stand the cold anymore, so he hurried out. As soon as he opened the door, he was hit by a wave of heat. The contrast of dozens of degrees made him feel extremely uncomfortable. Fortunately, his body had been strengthened, otherwise he might have gotten a minor illness.
He quickly closed the door to prevent the cold air from coming out.
Next, he wanted to enrich the contents of the ice cellar! He wanted to build a small granary inside the tree house!
23shu8
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