The immigration fees paid by a large number of immigrants have injected more construction funds into the Special Economic Zone.

The increase in manpower and financial resources has also accelerated the construction of the SEZs and created a benign development.

With the quiet efforts of Wei Minsheng and Long Hao, the foundation of the second urban unit gradually took shape.

The grouting reinforcement of the foundation and the construction of the fill above the sea surface can only be completed by conventional forces.

Because if you directly use the power of shared space to fill in a small island overnight, it is a bit too shocking.

After the first urban unit was built, the focus of machinery and work gradually shifted to the new island.

Between the two small islands, a curved embankment more than 10 meters wide has also been built, which not only connects the living and working areas, but also serves as a temporary docking point for ships.

With more space to work and easier transportation of materials needed on the construction site, the construction of the second urban unit was further accelerated.

And these construction workers, with the experience of building the first urban unit, worked according to the same building template, and even copied the content of the published task completely.

However, after the same work content is summarized through classification and statistics, the release of tasks appears to be more regular, and the work efficiency is further improved.

However, after the first urban unit is built, it must also provide a stable supply of electricity in order to fully function as a resident.

The use of temporary power generation equipment to solve the demand for electricity is unlikely to be applied in the long term.

Because this kind of power generation method, regardless of its power generation cost and environmental impact, is unbearable for Wei Minsheng.

Due to the size of the land area, the use of straw gas to generate electricity in other worlds also has the problem of insufficient fuel.

On this island, far from the mainland, wind energy is an almost inexhaustible source of green energy.

Therefore, after having a large amount of working capital, Shuguang Group negotiated with domestic wind power equipment manufacturers in the name of Tuvalu Special Zone through the domestic Minsheng Company and signed a wind power construction contract.

However, the construction of this offshore wind farm cannot be completed in a short period of time and can be put into power production.

Therefore, Wei Minsheng used the power of another world, all of which used riveting falcon structures to produce a large number of hardwood water wheels, and used advanced materials in the real world for anti-corrosion treatment.

It stands to reason that this water wheel can only be used in rivers, and in the uncontrollable direction of the current in the sea, it does not produce much utilization at all.

But Wei Minsheng's idea was always so different, in order to add another layer of security to the city of hope, he built an arc-shaped embankment in the direction facing the sea, about 200 meters from the foundation of the urban unit.

The arc-shaped embankment is connected to a large arc-shaped embankment that extends from both sides of the city and is used for land transportation between urban units and to protect against waves, and finally encloses a small crescent-shaped reservoir outside the city of hope.

Rectangular culverts were then built at intervals in the middle of the dam.

Part of the rectangular culvert is submerged below the surface of the sea, and under normal circumstances, the maximum level of the daily tide is less than half the height of the culvert.

In the middle of the culvert, a shaft is used to hold the hardwood wheel in place, so that the lateral baffle of the wheel just blocks the flow of sea water in the culvert.

Under the guarantee of real technology, the gap between the water wheel baffle and the culvert can be controlled at the millimeter level to obtain the maximum utilization rate.

However, for a wooden water wheel that is prone to deformation under stress, if the gap is too small, the water wheel is easy to collide with the culvert wall when it is running.

In this case, the chance of the wheel being damaged increases exponentially.

Therefore, in order to improve the utilization rate of water flow in the culvert, water baffles are installed at the entrances and exits at both ends of the culvert.

Under the action of the water baffle, the seawater through the culvert is concentrated in the middle of the transverse baffle of the water wheel, so that the water wheel can obtain a greater power source.

On both sides of the central shaft of the water wheel, two gear rings are fixed, and the sides of the gear rings are connected to a ratchet wheel that can only rotate in one direction.

The central shaft of the water wheel can be lifted after the fixing points at both ends are loosened.

After the water wheel is raised, the gear ring of the water wheel is automatically separated from the ratchet on the side to cut off the power and prevent possible damage to the water wheel caused by the huge waves caused by the storm at sea.

The moving water wheel is also easier to replace and maintain.

Under the effect of culverts, the ebb and flow of the tide and the unpredictable waves are locked in a fixed watercourse, which becomes a source of power that can be used.

The ratchets on both sides of the water wheel can convert the water flow in and out of the culvert and the rotational force that pushes the water wheel in any direction into mechanical energy, so that the utilization of tidal energy is possible.

Although there are many ways to use energy, with the exception of thermal power, nuclear power and hydropower stations with dams, other energy uses are not stable.

In order to obtain a stable energy output, energy storage is very important.

However, electricity is a kind of energy that is not easy to store on a large scale, and the best way to store energy at present is to store water and peak power stations, but this is not direct power storage.

In the process of pumping water with surplus electricity, a part of the energy will be lost, and then another part of the energy will be lost through hydroelectric power, and after multiple energy conversions, the energy storage efficiency can only reach about 60% of the original energy.

In order to achieve greater energy storage, the difference between the upper and lower reservoirs of pumped storage power stations is basically more than 500 meters, and some large pumped storage power stations even reach a drop of more than 1 kilometer.

But the larger the drop, the more complex and expensive it is to build a high-pressure waterway.

Moreover, this pumped storage method is also limited by the geographical environment, and there is no way to build it if there is no suitable terrain and sufficient drops.

Therefore, there is definitely no way to build such pumped storage in Tuvalu.

In fact, the pumped storage method also uses gravity, which is essentially the same as Wei Minsheng's gravity buffer storage method in another world.

It's just that the way of energy conversion is not the same, and the conversion efficiency of pure mechanical energy in the other world is much higher than that of pumped storage, and there is almost no additional loss except friction.

However, the mechanical gravity energy storage method is adopted, which is subject to the load-bearing force of the chain, and the storage energy is limited.

Such a structure is effective as a buffer energy storage device for unstable energy sources, but it is congenitally deficient when used as a large-scale storage device.

Therefore, it is necessary to find a way to store energy that is suitable for the geographical conditions of Tuvalu.

Otherwise, even if the offshore wind farm is completed, the unstable wind energy will not be able to meet the daily electricity needs of the City of Hope.