At this time, Niu Dali also spoke and asked, "Chief, what are we going to do later?" ”

"You guys." Huang Shi thought for a while, and then replied, "You people have to be divided into three parts, one part is to install and fix these water heaters, one part is to install various connecting pipes, and the other part is to lay tiles in the bathhouse." ”

Hearing what the chief said, Jiang Laogan and Niu Dali's eyes suddenly widened, and they immediately raised their hands without thinking about it, "Chief, leave the work of laying tiles to us." ”

They knew that the installation of the water heater must have been done by Ding San and Hu Zhentian, and the two groups of engineering construction personnel either did pipe connections, or connected various water inlet pipes and outlet pipes. Because they had already piped the cistern to each sink, it didn't feel too difficult.

But the chief said that the last one to lay tiles, this they have not done before, before they only laid that kind of antique bricks on the walkway of the park, now it is equivalent to let them learn to paste tiles, then it is equivalent to learning a new craft, for Jiang Laogan and Niu Dali for a rare opportunity, naturally it is very positive.

"I'll talk about it later, by the way, wait for you, and you, I'll help Xiaoding and Xiaohu for a while." When Huang Shi said, he ordered two young men, both of whom were more flexible, one was Brother Tang and the other was Li Renjun.

Ding San and Hu Zhentian did the work of electricians, and Huangshi felt that they had fewer manpower, so he assigned two newcomers to study with them, after all, if they want to build buildings in the future, the work of water and electricity decoration will also have to increase manpower.

After this arrangement, Huangshi asked the others to leave the field first, and there were only four people left on the roof who were ready to install the water heater.

……

Then Huang Shi took out dozens of big guys, which were the insulated water tanks of the water heater, and walked to the open space on the other side, putting down dozens of pairs of various stainless steel shelves, as well as dozens of blue and faint glass vacuum tubes.

These materials placed on the roof are all waiting for Ding San, Hu Zhentian, Tang Xiaoge and Li Renjun to assemble them.

After putting the materials, Huang Shi said to them, "There are 29 sets of materials here, plus the set I have already assembled, a total of 30 sets, enough for our current people on the island." ”

"Chief, do you have to install all these water heaters?" Because there are actually less than 200 people on the island, Li Renjun has some doubts.

"Hehe, soon, I will let Mr. Su and them recruit people here one after another, I'm afraid it's not enough." Huang Shi laughed as he walked over to the pile of stainless steel brackets, "You guys are going to put these brackets up now." ”

Ding San and the others agreed, and then went to the installed water heater to observe, found the corresponding brackets, support rods and connecting belts from the pile of steel parts, and then took out the electrician's bag they brought with them and began to assemble them.

The bracket of the solar water heater consists of two brackets, two support rods and a connecting belt, and the materials are all C-shaped steel, Z-shaped steel and U-shaped steel, which have sufficient strength and rigidity to ensure that they have sufficient load-bearing capacity. Moreover, in coastal areas like Dongluo Island, where the daily wind is very strong, Huangshi also paid special attention to whether they were designed to resist wind when purchasing brackets.

After assembling the three pairs of brackets, Huangshi told them to stop and let them install the insulated tank on the connecting belt. The shell of the thermal insulation water tank has color steel and stainless steel, the color steel does not lead to lightning, but it is easy to peel off the paint, and the stainless steel will conduct lightning and lightning, which is more light-resistant. However, the inner tank is basically stainless steel, and the middle is not a vacuum, but a thermal insulation cotton.

It's just that the 300-liter capacity insulation water tank is a bit heavy, and in addition to the fact that the bracket is very high this time, Ding San and they have to find a way to put a few large boxes under their feet to put this water tank on it.

It turns out that the height of the bracket of the water heater mainly depends on the length of the vacuum tube and the angle of the bracket. The vacuum tube is divided into one meter two, one meter five, one meter six, one meter eight, one meter nine, two meters, two meters one, two meters two, so many kinds, the longer the length of the vacuum tube, the higher the corresponding bracket height, although there are also angle reasons, but the main thing is that the length of the vacuum tube determines the height of the solar host.

For example, if the vacuum tube is 1.8 meters, then the height of the water heater can reach about 1.78 meters. And like the water heater that Huangshi bought this time, the vacuum tube is two meters one, so in this case, from the ground to the highest point of the water tank, it reaches two meters, and Ding San and Hu Zhentian may not be able to touch it even if they hold their hands high.

Seeing that they put a lot of effort to put the water tank up, Huang Shi spoke out again, and concisely pointed out the method of how to fix the insulated water tank and the bracket one by one.

After this step, the rest is for Huang Shi to demonstrate in person, he wants to put the vacuum tube **** water tank, "You turn this shelf in a different direction." ”

Ding San and the others didn't know why, but according to what Huang Shi said, the four of them carried the shelf and turned it in a different direction.

"When we install a water heater under the sun, we must first fill the vacuum tube with water and insert it into the tank, or cover the sunlight on the vacuum tube until the tank is filled with water before it can shine into the sun, otherwise these vacuum tubes will easily break.

A few people said that it was strange, but it was definitely inconvenient to load water on this roof, and there was nothing to cover it, so after turning these shelves around, the sun would not shine for a while, which was a solution.

Then Huang Shi took out a watering can, added a little dish soap to it, and asked Li Renjun to go downstairs to fill up the water, and when he came back, he said to them, "When we intubate, we should first spray some slippery water on the upper part of the vacuum tube and the sealing ring of the water tank, so that it is easier to insert the tube." ”

So they saw that the chief first wiped the cleaning **** on the wind shield, then put the protruding direction on the vacuum tube, and then smeared some dish soap on the position of the vacuum nozzle, and then held the middle of the vacuum tube with his left hand, held the bottom of the vacuum tube with his right hand, aimed at the round hole in the water tank, and slowly rotated to push it up.

After Huang Shi finished this step, he reminded Ding San and them, "What you have to be careful about is to protect the tip of the bottom. ”

……

Seeing that their faces were full of hesitation and excitement, Huang Shi smiled and comforted, "Okay, you guys can try it too, don't be afraid, these tubes are not very heavy, just be careful." ”

"Chief, then I'll come first." Ding San saw that the other three people did not move, so he had to take the initiative to ask for help first, because the chief was looking at him with encouraging eyes.

"Okay, be bold, don't be afraid."

Ding San learned what Huang Shi had just done, first wiped it on the wind shield ring and the head of the vacuum tube with a cleaning ****, then took a deep breath, carefully grabbed one from the pile of vacuum tubes, and walked back slowly. As the chief said, although this tube is very long, more than 2 meters long, it is not thick, only 70 millimeters, and it is not heavy, and it is not difficult to grasp it with two hands.

The vacuum tube is the core of the solar water heater, and it looks like an elongated thermos, which looks very fragile, as if it will break if it is touched lightly, so Ding San is holding it a little like walking on thin ice.

It is composed of inner glass tube, solar selective absorption coating, vacuum interlayer, hood glass tube, supporting parts (spring clips), getter and other parts, among which the inner glass tube is used as a flow pipe for water, with copper oxide, black nickel, black chromium, black zinc, black copper and other solar selective absorption coatings, which are uniformly coated on the outer surface of the inner glass tube by vacuum deposition, sputtering technology, electrochemical treatment and other processes.

And its structure is also like a thermos, with a vacuum between the inner and outer layers. The surface of the inner glass tube is coated with a spectrally selective absorption coating to maximize the absorption of solar radiant energy. After being irradiated by sunlight, the photons hit the coating, the internal energy of the sun is converted into heat energy, and the water in the tube absorbs heat from the outside of the coating, the water temperature rises, the density decreases, and the hot water moves to the upper part of the coating, while the cold water with a large proportion decreases. The hot water is always located in the upper part, i.e. in a solar-insulated tank.

The heating of the hot water in the solar water heater has little to do with the outside temperature, mainly depends on the length of the light time, so in the winter season, it is cold outside, as long as there is sunlight, then the hot water supply in the room will not be missing.

Ding San carefully put the vacuum tube into the water tank, and finally breathed a sigh of relief, and was about to move the second one, when he heard the chief say, "Now, Xiaohu, you can try it." ”

In this way, Ding San and the four of them took turns to install the vacuum tube, but the speed was not very fast, Huang Shi said, "In this way, when the vacuum tube is installed, you can divide the labor, and the speed may be faster." ”

Huangshi means that they should have one person take the tube, one person wipe the dish soap, and two intubations, so that the speed is much faster.

Sure enough, after they arranged it like this, the speed was doubled, and then Huang Shi clapped his hands and said, "Okay, you can do the rest of the things yourself, and report back to me when it's done." ”

After Huangshi left, Ding San and Hu Zhentian felt a lot more relaxed, after all, the chief was watching from the side, always afraid that he and others would make a mistake, so even the efficiency improved a lot.

After a while, two more young men came up from downstairs, and they heard that it was the chief who had transferred them out to support the work like Li Renjun and them.

"Great." The two leaders, Ding San and Hu Zhentian, glanced at each other, and just as they felt that the manpower was tight, the chief was relieved, and naturally accepted it happily.

After doing this for another hour, everyone was a little tired, sat down on the roof, drank a few sips of water, Ding San saw the sunlight shining on the side with the vacuum tube, and said to Hu Zhentian, "I'll take someone to the warehouse to get some sunscreen cloths and cover them up, so as not to spoil the light." ”

"Okay, then you can go." Hu Zhentian nodded, this is what the chief just explained.

Because Li Renjun is relatively tall, he is the main force supporting the water tank in front, so he was left by Ding San to rest. Now he was sitting there and saw Hu Zhentian reading a book in his hand, so he asked, "Uncle Hu, what book are you reading?" ”