The weather was fair, and Long Yan occupied the port city.
Due to the influence of the cold wave, the temperature dropped sharply after experiencing several heavy rains.
Fortunately, Liu Zheng had already made preparations before the cold winter arrived.
He mined coal from the East India region that no one wanted to use locally and shipped it to Longyan Port.
In addition, the indoor smokeless heater developed by Liu Zheng based on the stove is actually a traditional coal stove.
It's just that when Liu Zheng made the stove, he used red clay as the core of the stove. This kind of soil is extremely resistant to burning and has excellent heat preservation properties.
Originally, the most traditional stove only had a furnace core without any protective measures on the outside.
This can lead to carbon dioxide poisoning produced by burning coal.
Although Liu Zheng improved the process and produced anthracite, this alone was not enough.
Anthracite is not truly smokeless, but it is less volatile and produces less harmful substances.
But it still existed, so Liu Zheng improved the stove.
The solid outer wall is made of airtight steel. In order to make it foolproof, Liu Zheng also adopted an ancient but never outdated production method.
Wax sealing method!
The sealing of the entire furnace wall is improved to a higher level.
To ensure the loss speed of heat and smoke.
At the same time, one side of the stove is designed as a heat conduction port. The heat generated by the combustion of the stove will enter the heat conduction port along with the generated smoke.
Follow the heat conduction port and enter the thermal insulation kang, which is also made of iron, to evaporate the heat.
The smoke generated by the burning stove will come to the outside along the iron pipe on the insulated kang.
This creates a thermal cycle and increases the temperature.
"That's all we can do right now." Liu Zheng sighed and added a piece of coal to the stove.
Although the wind was biting outside and many people had thickened their clothes, Liu Zheng wore very thin clothes inside.
It is a replica of the water boiler that I knew in my previous life, but it cannot be achieved with current technology and design.
That type of furnace has a water pipe installed in the furnace wall, and the heat of the entire furnace is circulated through water to provide temperature.
The biggest advantage of this kind of water heater is that even if the fire goes out, the residual heat can last for a long time.
It's a pity that the material problem has not been solved yet. The water pipe must be one that is not easy to corrode, and it also needs to be circulated.
Although the world has now experienced the industrial revolution, there has been no breakthrough in existing materials.
Only the craftsmanship has been improved.
Therefore, Liu Zheng eagerly wanted to develop electricity and accelerate his industrial level.
The efficiency of steam engines is too low. Even Long Yan's most advanced steam engines are far behind the British steam engines in terms of core efficiency.
Although the Yinzhou ship is recognized as the strongest ship in the world, it is not yet out of reach.
At this time, a veteran general came in.
He was wearing a military coat. Although it was late autumn, the temperature outside made him feel like it was winter.
But now that he entered the house, the warm heat hit him, and he instantly felt like he was bathing in the spring breeze.
Liu Zheng glanced at him and asked, "What's the matter?"
The general gave a slight salute, and then said: "There are a large number of Austrian refugees around the city. Sir, do we want them to enter the city?"
Liu Zheng thought for a while, feeling very strange.
Their Longyan Army did not go into full-scale war with Austria. At most, it was a confrontation. In addition, the situation in Austria is relatively stable now.
There will never be a large number of refugees.
Where did these Austrian refugees come from?
According to the situation in Austria, although this winter will be difficult, it is not unbearable, and there should not be so many refugees.