how so!

Seeing the squeezing blank making machine slowly squeezed out the bricks, Shi Yiwen was stunned.

This... is too slow!

The extrusion blank making machine does not make tens of thousands of bricks per hour as he imagined. At the current brick making speed, it is already very good to make thousands of bricks.

"Young Master, with this brick making machine, our brick price can be at least 50% cheaper!"

Zhao Guoye obviously did not pay attention to the change in Shi Yiwen's face.

Shi Yiwen, who looked quite ugly, looked coldly at the "inefficient" brick making machine. He squeezed out a row of bricks in about a minute, sixteen pieces in a row, and one hour... one thousand pieces.

This efficiency is really too low!

how so?

What's the problem?

After searching for a while, Shi Yiwen finally found the problem - lack of motivation!

"The efficiency of the brick making machine is too low, mainly because of the water truck!"

Sitting on the embankment, Shi Yiwen stared at the rows of drainage trucks in the water diversion canal on the river bank and asked with a frown.

"Guangqi, you have also learned a lot of physics knowledge in the past few months. Do you know why the water truck is inefficient?"

The teacher's replies made Xu Guangqi slightly stunned. He carefully observed the water wheel and connected with his own physical knowledge. After a while, he tried to answer.

"After the water leaves the water wheel, the water usually still has a speed, which may waste a lot of the kinetic energy of the water wheel."

Xu Guangqi's answer made Shi Yiwen nod. For a thousand years, all kinds of water trucks have actually used the weight of the water to drive the upward-shooting water truck. This kind of water truck has low efficiency and has one biggest disadvantage. This type of water truck will not be used in winter because the river surface will freeze.

And the winter in the capital...thinking that the north will only get colder in the next few decades, Shi Yiwen pursed his lips and nodded and said.

"It is true that the water wheel uses the weight of the water itself to drive it, which does not fully utilize the hydraulic power. Water flow itself is a stronger power. We can design a new water wheel to obtain energy when the water flow hits the water wheel."

Turning his head to look at Xu Guangqi, seeing that he still seemed to be puzzled, Shi Yiwen said with a smile.

"How is it? Are you willing to try it with your teacher?"

In fact, there is no need to try it at all. After all, there are many articles and books about turbines in the library. Although they are often related to electricity, they can still give him many inspirations. After all, turbines were originally invented not to generate electricity, but to provide power to factories.

Hydraulic machinery was not eliminated in some areas with abundant hydropower until the end of the 19th century. Although it cannot be compared with steam engines, it is still popular with many factories as cheap energy, especially when new turbines can provide power of dozens or even hundreds of horsepower.

All of this is due to the invention of more efficient water turbines by French engineer Furnelon Benoit in 1832. The waterwheel that has not changed for nearly 2,000 years has finally been replaced by efficient water turbines.

The iron factory has accumulated rich experience in metal processing, but the problem is how to design the entire hydraulic power system.

"It's it!"

Finally, after searching repeatedly in the library and comparing the information, Shi Yiwen chose a small low-head runoff hydropower station designed in the 1960s. This "small hydropower" designed to send light to "million farmers' brothers". Not only does the overall structure be simple, but even the turbine can use wooden propellers. Although only a few pages of simple pictures and thousands of words of text introduction were found in the library of space, Shi Yiwen still figured out its principle. This runoff hydropower station is built on a diversion weir. The water intercepted by the diversion weir rushed to the low-level water wheel through the waterway under the action of gravity, pushing the water wheel to rotate and driving the generator to generate electricity. Then the water flows into the normal river channel. Because this type of hydropower station does not require a large amount of water storage, of course the project volume is much smaller.

The reason I chose it is because its construction period is short. According to the book, it invests 500 labor and can be built in just one month. Except for generators, other equipment can be produced by natural means, including raw materials including cement.

Because the construction period is short and you only need to change the generator to a drive shaft to apply the drawings directly, it naturally becomes the best choice. What's more important is that compared to those huge old waterwheels that can only provide a few horsepower power, it can provide more than ten, or even twenty or thirty horsepower power.

After drawing simple drawings, they immediately started to recruit workers and build them. In the next month, the banks of the Lugou River became a busy construction site, with nearly two thousand craftsmen busy digging water diversion channels. Xu Guangqi, who had been following Shi Yiwen to study turbines, was responsible for casting turbines and other equipment in the iron factory.

As for Shi Yiwen, he transformed into a civil engineering engineer and guided the craftsmen to build a water diversion channel. However, in the process of building a water diversion channel, he encountered a problem - cement!

Because it is soil, water and electricity, it does not use pressure steel pipes to divert water, but uses brick and stone diversion weirs. Whether it is brick or stone, it needs cement to be built. However, the cement in the space has been almost used. After all, not only does it require cement to be used to build wheel kilns, but cement is also used to build the frames of the water trucks and even factories before. Although there are hundreds of tons of cement on the construction site in the space, it cannot withstand such use.

Just when the project was at its most critical moment, with the news brought by Sun Ming'an, the project had to be suspended.

"Young Master, this cement has been used up. I don't know when will the new cement be sent over?"

Sun Mingan looked at the young master and asked. Like his master, he had worked in the Ministry of Works. After coming here, he was most surprised that the cement that would become solid as solid as stone after being raised with water and gravel.

Although he was very curious before, he never asked where the cement came from and how it was made. After all, as a craftsman, he knew very well that some things were other people's magic weapons and could not ask what they could not ask.

But now that the cement is used up and the work is about to be stopped, he has to ask.

"this……"

Facing Sun Ming'an's inquiry, Shi Yiwen's face turned bitter.

That was so easy. He thought there was a lot of cement on the construction site, but he thought that the cement would be so useless and would be used up so quickly... It's true.

"There is nothing to give away. I can do it, let's make it ourselves now..."
Chapter completed!