Make ice!

On a tropical desert island, even if you make ice, it is not so easy to store it well.

The daytime temperature on the desert island is around 40 degrees, and even more ice will melt away, and the amount of liquid nitrogen is limited, and only a few bottles have been found.

Qin Fengyi has a package of ice-making plans, first of all, to make a cellar, a cellar that can keep warm without seepage and leakage.

"Liquid nitrogen is much better than saltpeter when it comes to ice, but ...... Liquid nitrogen is still too little. Lin Qingxue pursed her lips, "I want to know what you think, Qin Fengyi." ”

Liquid nitrogen to make ice is very simple, use a wooden barrel with some liquid nitrogen, and then throw a few bottles full of water into the wooden barrel and seal it as much as possible, because the temperature of liquid nitrogen is very low, around minus 200 degrees, and it will evaporate in a short time.

Before the liquid nitrogen evaporates, a large amount of water needs to be prepared, and the plastic bottle can be filled with water, and a simple calculation shows that there are bottle caps in the shelter, and there are hundreds of bottles that can be sealed.

This is also thanks to the diligent picking up of marine garbage after all, otherwise it would never be possible to hoard so many plastic bottles, and at the same time, it also shows in disguise how serious the pollution is now, and plastic waste has begun to spread in the world's seas.

It's hard to make ice on a small island in the South Pacific, first of all, because the high temperatures are a big threat to the ice, which melts into water in a few hours at room temperature.

Therefore, an ice cellar that can be kept warm is needed.

"First of all, what we have to do is not ice, but something to keep ice!" Qin Fengyi pointed to a place not far away, "There is an underground stone chamber, about 7 meters deep, the temperature in the stone chamber is low, the daytime temperature on land is 40 degrees, and the temperature in the stone chamber may be about 25 degrees." ”

"So, you plan to make a cellar there?" Han Xuening roughly knew that the ancients' method of hiding ice was to use winter ice to hide it in the cellar and make some insulation measures in the cellar, so as to form an ice cellar.

"However, the cellar alone is not enough, it needs a series of thermal insulation measures!" Qin Fengyi said, "I remember when I was a child, there were small vendors who wrapped ice cream in quilts and sold them on the street, so that the quilts could keep warm and prevent the ice from melting so quickly......

"But...... We don't have quilts......" Lin Qingxue said with a wink, there are silk and flax, but compared to cotton, the gap between these things and cotton is not ordinary.

"You can use something else instead, such as using these foams to make a box, making thick straw mats with thick weeds around it, and then putting a lot of frozen bottles into the foam box...... Qin Fengyi explained, "Now the buildings are covered with foam on the outside walls, just to keep warm, I think...... The foam insulation effect should be good. ”

"You can try ......"

Lin Qingxue and Han Xuening thought for a moment and felt that it was feasible, the only drawback was that there was too little foam, and it was really difficult to make the foam box that Qin Fengyi said.

"On Saturdays, Sundays, you go outside and bring in that hay. Qin Fengyi said to the sleeping giant ape.

"Wow woo woo ......"

The giant ape was very reluctant to stand up slowly, some time ago when the giant ape was clearing the wasteland, a lot of weeds were dug out, and most of the weeds on the desert island grew extremely luxuriantly, all at knee-high height.

"It's all the bubbles in the shelter...... It's hard to make the kind of box you say. Lin Qingxue and Han Xuening tidied up a little and found a few pieces of foam, which were of different sizes and thicknesses.

"It can only be said that the ideal is very plump, and the reality is very skinny...... Qin Fengyi's plan to make a big refrigerator with foam came to naught......

If you want to build a civilized city, nature will always give you some problems, don't be discouraged when it is difficult, think hard, try more, make reasonable use of everything you have at your disposal, and then you will find that most problems can be solved.

"Let's take it one step at a time......" Qin Fengyi thought again, maybe you can use mud and stones to make a mud refrigerator, the thick mud should be able to isolate a little temperature, you only need to make mud into the refrigerator to make an insulation layer.

The great apes have a lot of physical strength, and it didn't take long for them to bring in all the weeds, and there were many of them, and when they were exposed to the sun for a long time, the moisture in the grass was evaporated, and the weeds all turned yellow-green.

Lin Qingxue and Han Xuening began to weave straw mats, the two girls were both ingenious, and the straw mat weaving went smoothly.

Qin Fengyi's work was heavier, he had to make a refrigerator made of clay out of yellow mud and stones.

"I'll go and mud, you weave slowly, and when we're done with the basics, we'll try to make ice. Qin Fengyi looked at the two girls weaving straw mats so quickly, and he nodded with satisfaction.

In the yellow earth by the river, many cacti grow here, and these cacti also grow some purple fruits.

Later, you can try to pick a few cactus fruits, this small reddish-purple fruit tastes delicious, but there are many thorns growing on it, and you need to clean these sharp thorns, otherwise when you taste it, you will be pricked and suspicious.

"This is it!" Qin Fengyi found a low-lying place and ordered the giant ape, "You dig a pit here, and then mix mud in this and transport mud over there for me." ”

By digging a pit here, you can not only get mud for making refrigerators, but also dig a little deeper to make a well.

Although there is a river that flows slowly next to it, no one knows how long the river will last because the water of the river comes from the ground.

Perhaps, in the next moment, the source of the river will dry up for various reasons, and a deep well can be drilled to store fresh water.

One well, enough to feed them......

The giant ape used an iron pickaxe to dig a pit, and on Saturday and Sunday it worked very hard, digging a pit half a meter deep and 2 meters in diameter with a few pickaxes.

The yellow clay is very sticky, there are hardly any impurities, it looks like a special clay used for clay sculptures, in the yellow clay clay, there are many earthworms, and some unlucky eggs have been cut in half by the giant ape with an iron pickaxe.

Qin Fengyi found some dried palm leaves, crushed them and mixed them with the mud, which could increase the cohesiveness of the soil.

After that, all the mud was moved to the underground stone chamber, and the prototype of the mud refrigerator was made, which was generally a mud pond with a circular shape of about 2 meters in diameter and a depth of 1 meter.

A straw mat filled with a mud fridge is not as insulating as a quilt, but it's better than nothing.

There is a lot of dead grass in the cells of ancient movies, and it is obvious that this thing can indeed keep warm.

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The new book (Immortal God's Demon Pet Cultivation) asks for collection......

This book, suspended writing, subject matter limitations, can't write at all, has begun to become a fantasy, and the content of survival is getting less and less, and it is no longer what I expected at the beginning.

I'm sorry...... I tried my best.

(End of chapter)