A boiler heating system is not a complicated thing, its essence is to heat boiling water, then transport the heat energy through pipes to the room, and then diffuse it by the radiator. Pen Fun Pavilion wWw. ｂiquge。 The carrier of INFO heat can be either water or water vapour, the latter of which is used by Roland DG because of the higher temperature limit of the steam and the easier circulation. As long as the boiler is burned, the resulting steam pressure will automatically fill every corner of the pipe with tiny, high-temperature droplets, even the water pump.

Of course, water vapor heating is not without shortcomings, the pipeline is always in a high-pressure environment, the interface is not firm, it is easy to leak or even explode, two or three hundred degrees of high-pressure steam as long as it is touched, so the installation quality requirements are higher. Anna's black wire soldering ensures the strength of the interface, and with Soloya's coating, this disadvantage can undoubtedly be minimized.

At the same time, Roland also set up an automatic pressure reducing valve on the boiler, the mechanical principle of which is the same as the centrifugal governor on the steam engine, when the pressure in the furnace is too high, the high-speed rotating flywheel will pull up the valve, exhaust depressurization.

The final safety was at the point where the boiler was connected to the two main heating pipes, and he had Anna carve several grooves around the copper pipes to make them less strong, similar to cans. Even if the pressure valve is not opened properly, the explosion can occur in the boiler room without endangering the people in the room.

When the heating system was put into operation, the scene in the castle changed completely.

The heavy and thick winter clothes were gone, the witches had changed into their autumn clothes, and as he watched the colorful girls talking and laughing in front of him, Roland felt that his motivation for work had risen by five percent.

Of course, these facilities are for enjoyment, or to create a better working environment.

The next thing to do is the important project related to the future of the West.

The result is the synthesis of ammonia and the reduction of reliance on saltpeter, thus raising the production of chemical explosives to a whole new level, allowing it to meet the requirements of automatic firing weapons.

Achieving this goal before the end of winter would undoubtedly put a lot of leverage on the planned spring offensive.

Roland called Kemo Stoll and Agatha to his office.

"How well have you worked together these days?" he asked with a smile. One is the chief alchemist of the border town, and apart from his love for alchemy, he hardly cares about the feelings and opinions of others. One is from the witch kingdom four hundred years ago, with the pride of being a member of the Secret Society, the highest research institution, and the two are both straight, and together they are like powder kegs that explode at the touch of a button. Roland is also often worried about whether they will quarrel, but whether it is nitrification powder or synthetic ammonia, the two must work together, so he still has to ask about the situation first, and if they don't get along, he can only mediate.

"Very good," Carmo said to Roland with a slight surprise, "Miss Agatha's abilities have been of great help in chemical experiments, and now that I have found a stable synthesis temperature of nitro*glycerin, which has been prepared in the laboratory, I am further testing the possibility of industrial preparation...... It's fair to say that none of this would have been possible without the ice cup. Oh, and I didn't notify you because I was so busy at work. He paused, "By the way, if you're looking for this, can you get me back to the lab now, I still have a lot of things to do." ”

Belch...... Is that so?" Roland looked at Agatha, who nodded.

"Mr. Kemo's knowledge is indeed unusual, especially the knowledge of the elements, which is quite similar to the Mystery Society. Our cooperation is very pleasant at the moment, and if he is transferred to Tachira, he will inevitably be absorbed by the federation. ”

Could it be that it is easier for a straight person to get along with a straight child? It seems that he is worried about nothing, and why is the chief alchemist's attitude towards witches better than that of himself? It's sad...... After sneering in his heart, Roland cleared his throat, "Since that's the case, I'm relieved." I have called you here, for there is a new study to be given to you. ”

Hearing the word research, Kemo immediately came to his senses, "You please." ”

"As I said before, there are many different gases in the air, and now is the time to take advantage of them. Roland recounted his thoughts in general, "According to Elementary Chemistry, oxygen and nitrogen make up 99% of the air, and now I need to separate these two gases for chemical production." ”

Camo thought for a moment and replied, "You mean, taking advantage of their different properties...... For example, the boiling point and the melting point are different to separate?"

"That's right," Roland nodded approvingly, "to condense the air and then heat it up, nitrogen has a lower boiling point than oxygen, so it will be fractionated from the liquid first, and since this temperature is far below the freezing point, it is difficult to do with the current conventional means, so it must be achieved with the help of Agatha's ability." ”

"Turning air into liquid," Camo said grinning, rubbing his beard, "sounds like a lot of fun." ”

"If you lower the temperature further, they can even turn solid, like ice cubes," Roland smiled. This is definitely a scene that modern alchemists have never imagined, and seemingly ethereal gases can be held in their hands - provided that they take precautions against freezing.

"I've read some of that book, but when I freeze the air, I don't see it solidify into multiple gases. ”

"Because they don't stratify when mixed together, it's hard to tell with the naked eye," Roland explains, "and the first thing that's excluded is carbon dioxide, which has the highest freezing point, but it's so low in the air that you won't even notice the fine particles that solidify." Next is oxygen and nitrogen, which blend perfectly together, giving it a pale blue color that, if not separated, looks like a pure substance. In fact, liquid nitrogen should be colorless. ”

"What are we supposed to do?"

"Prepare the fractionation vessel first," the prince said, curling the corners of his mouth, "this is a big project. ”

There is no doubt that Agatha alone is not enough. Glass is prone to shattering due to repeated temperature changes, so containers containing liquid air have to be made of all-steel shells. This is not a difficult task for Anna, but the fully enclosed shell will make it impossible to observe the change of liquid air when the temperature rises, so it is also necessary to use Sylvie's magic eye to observe the scene inside through the container, and then let Agatha record the specific amount of magic consumed when the liquid nitrogen boils, in order to obtain the temperature parameters of stable production.

This preparation lasted three days.

When the container was manufactured, Roland visited the chemistry laboratory to guide the town in its first experiment of oxygen and nitrogen separation.

. (To be continued.) )