Wang Qi, who lived in the palace, suddenly got two pieces of good news. He was very happy and even ran to the kitchen to make a sweet and sour fish.
Li Xiang was studying magic today and didn't notice him reading the news, but after taking a bite, he knew it was made by Wang Qi because the taste was different.
Wang Qi attaches great importance to the taste and texture of the ingredients themselves. The left-hand ingredients and spices are just the icing on the cake. In his words, the king and his ministers assist the left. Although the palace kitchen also intends to please, after all, the people chosen are the Night Clan who can guarantee their loyalty. The second generation of the disaster have no chance to systematically pass on the cooking skills. There is not a single chef who can be called a professional. In addition, the kitchen has to be managed. With enough food for two to three hundred people in the inner court, and no extra budget for practicing skills, after many years of imitating it, it can only be like a 70% or 80% improvement, but the difference is quite obvious.
"What's the good thing?"
"Breakthroughs in basic technology and good news on aircraft engines."
Li Xiang didn't ask about the engine. She knew that Wang Qi actually didn't care about application technology that much: "Basic technology?"
"Yes, a magic technology that can transfer the heat of low-temperature substances to high-temperature areas."
"...You're not talking about the freezing spell, are you?"
The essence of the freezing spell is the same. Only part of the heat will disappear, and most of it will just be transferred. This change rate is very small, and it feels relatively limited.
The specific heat capacity of water is four times that of air of the same weight. One kilogram of water cools down by one degree, which causes a little more than three cubic meters of air to heat up by one degree.
The volume ratio sounds exaggerated, but it is nothing compared to the huge amount of air. For example, if a person is cooled by 50 degrees from the inside to the outside and turned into a popsicle, it can only heat 9,000 cubic meters of air by one degree, which is only the radius. With a height of only 20 meters and two floors, this amount of air is dynamically raised by one degree due to the flowing aura of the atmospheric environment, and people may not be able to feel it.
In actual applications, there are very few spells that can freeze a person from the inside out. The scale of heat transfer is even smaller, and it is only noticeable indoors.
Sure enough, Wang Qi nodded: "It's almost the same, but there are some differences. Freezing cannot specify the direction and medium of heat diffusion, but it can."
Li Xiang thought for a while, but couldn't think of anything: "Very useful?"
"Of course, on a larger scale, this is a technology related to the sustainability of civilization."
"Ah!?" Li Xiang stared, is it so exaggerated?
However, his evaluation of the ice tree was similar.
So it still has something to do with heat death.
"Of course sustainability is too far away from us. At this stage, it is mainly about the prospects of industrial applications." Wang Qi was not in a hurry. After eating, he and Li went to the ninth floor to view the scenery, and by the way, they wrote and drew to tell her what she could do.
Heat can break through the natural flow and move from low temperature to high temperature. In industry, it can be used for refrigeration and waste heat recovery.
Waste heat is entropy, energy that is difficult to reuse by living things. Plant growth requires a certain temperature, but plants do not use temperature, but rely on this temperature to maintain cell activity. This heat will eventually be dissipated into endless space with thermal radiation.
Industrial waste heat is mainly concentrated in waste gas and waste water.
For example, in a steelmaking plant, the original blast furnace had to emit a huge amount of heat. Now it can find ways to concentrate the heat above and use steam or metal heat conduction to maintain the temperature of the furnace below, effectively saving fuel.
Another example is steam power generation. The 400-degree steam that passes into the turbine travels twice in the turbine and comes out at about 200 degrees. This steam has to go back to the boiler through pipes for reheating, and part of it will return to the state of water.
Now we can try to process the 200-degree steam on-site, and raise one-quarter to one-third of the steam to 400 degrees again, and the remaining part is completely converted into water for reflux. The water pipe is small, the temperature difference between the inside and outside is low, and the heat lost on the return path will be much smaller.
Moreover, return water has more advantages than return steam in terms of production safety. Because steam is highly corrosive to metals, it is impossible to deploy stainless steel throughout the entire turbine and boiler plant area, and there is bound to be a risk of pipeline corrosion.
Even further, the existing central cooling tower can only cool down the surrounding factory buildings slightly with the help of floors and radiators. The heat conduction of the air is poor, so that the temperature in some areas is still very high, and the working environment is still harsh.
Now it may be possible to specially design a heat collection device to use the heat conduction of water pipes to cool down. The effect will be significantly improved, which will help the cooling tower circulate to increase the flow rate and maintain an even temperature in the entire area.
Regarding the application of refrigeration, Wang Qi thinks that we should focus on residential buildings first.
Use a water circulation radiator to collect indoor heat and circulate it to the water, or turn off the magic module and let the radiator naturally release the heat in the water pipe.
This integrated cooling and heating temperature control method is much more reliable than trying to expand the production capacity of small motors to manufacture air conditioners. After all, the electricity has to be sent out and then transported. The magic module of the magic array is equipped with a magic collection module in each building. Delivery is available throughout the building.
When used in industrial refrigeration, the report of the director of the institute pointed out that there is no way to transfer heat below 0 degrees Celsius. Naturally, it cannot compare with ammonia refrigeration and petroleum gas refrigeration. The latter can reach more than 100 degrees below zero and can be used to produce liquids. nitrogen.
Contrary to petroleum fractionation, the separation of petroleum gas relies on low temperature and high pressure.
The critical temperature of each gas is different. This critical temperature is the highest temperature at which the gas can liquefy in a high-pressure environment.
For example, ammonia can achieve low-pressure high-pressure liquefaction at room temperature. It can achieve liquefaction at a maximum pressure of more than 130 degrees Celsius with ultra-high pressure of more than 100 times atmospheric pressure. After critical liquefaction, heat dissipation can be achieved by spraying water on water pipes and blowing air to reduce the liquid to The temperature is minus 33 degrees or even lower, so it is a very important and basic industrial refrigerant.
Liquefied petroleum gas has complex components. Among them, methane has a critical temperature below zero. Its normal pressure boiling point is minus 161.5 degrees and its critical temperature is minus 82.1 degrees. It is the main source of the low temperature required to produce butyl rubber. In this temperature range It can also produce critical liquid nitrogen and liquid oxygen. With these two people, minus two hundred degrees is no longer a fantasy, and liquid hydrogen is just around the corner.
The subsequent development route of the new low-temperature heat-to-high-temperature conversion technology is similar to that of industrial coolants. The ultimate goal is to directly create critical liquid helium through heat absorption. With the addition of industrial means, it can utilize heat at least minus 269 degrees Celsius.
The remaining 4.16 Kelvin calorific value is probably really hopeless.
"It's really great. What engine can be considered good news if it is put together with it?" Li Xiang was curious.
Heat reversal technology can be said to be epoch-making, and it cannot be compared with internal combustion engines. No matter how good an engine is, it cannot bring about such a degree of change.
"Of course the engine is not that powerful, but I see a new possibility."
Wang Qi never thought about it, or he couldn't focus on magic testing, so when he saw the report from Blue Sky Heavy Industry, he learned for the first time that magic can directly separate water into hydrogen and oxygen, and can even be used to make Jet engine.
The biggest problem with electrolyzed water is not that it consumes high power, but that it is slow and cannot be produced temporarily to keep up with consumption needs.
God doesn't care about it in advance, only the earth.
The so-called hydrogen energy is to use the reverse electrolysis reaction of hydrogen and oxygen to produce electrical energy. This process requires the use of platinum as a catalyst. Is it possible to electrolyze water directly at a charging station to replenish hydrogen without using a hydrogen refueling station? If it can be realized, even water can be recycled in the car, and the oxygen can be drained during electrolysis, without wasting an extra container.
The answer is no. Electrolysis is too slow and the utilization rate of electric energy is limited. It is not as economical as burning coal to purify hydrogen from coking gas.
If magic can make the speed of electrolysis...or magic solution keep up with the demand of jet engines, can it be directly used to build rockets?
Liquid hydrogen and liquid oxygen rockets are a very difficult thing for scientists.
Its advantage is high specific impulse, which can be understood as the total thrust value that unit mass of fuel can bring. Hydrazine fuel is generally used as a first-level specific impulse below 300 seconds. The advantage is that it is easy to store and transport. Liquid hydrogen and liquid oxygen The theoretical specific impulse can reach more than 520 seconds, and the finished products of Wang Qi's era exceeded 500.
But liquid hydrogen itself has a very low density, weighing just over 100 kilograms per cubic meter. Liquid oxygen is not much better. It is thicker and brings greater resistance. At the same time, due to the need for storage pressure, additional thickness is required. Container wall.
But if on-site hydrolysis can be achieved, will there be a brand new solution? The carrying capacity of hydrogen and oxygen rocket fuel can be increased by an order of magnitude while maintaining the specific impact advantage.
Rocket... do you want to do it?
