Looking for a top boss with a naval background to talk about supporting distributed gas turbine power generation technology, of course, it is indispensable to talk about the series of gas turbines on hand in Southwest Motor, based on the comprehensive reduction of power of Qingcheng engine in exchange for life and use cost, and developed a simple cycle gas turbine of Qingcheng engine.

According to the engine naming scheme stipulated by Southwest Motor, the industrial gas turbine improved based on a certain type of aero engine is usually named after the river near the mountain range named after the aero engine.

Naturally, the river located near Qingcheng Mountain is the Minjiang River, so there is the first generation model of Qingcheng Airlines: Minjiang 85.

Minjiang 85 then made two sets of different cycle power generation equipment, so they added the corresponding suffix to the back, which is the southwest motive naming routine, on the whole, it is no problem, simple and convenient.

In order to ensure the service life and equipment maintenance costs, the thermal efficiency of this Minjiang 85 gas turbine is not high, and the highest is only 31%, which is considered to be a lower than average level in the nineties.

In the past, due to the need for ground power generation, the efficiency could be improved by the huge steam cycle or intercooling reheating, but this time it is different, and the military has put forward a different opinion.

There is no way, now it is impossible for the 052 series to continue to purchase LM-2500 engines, seeing that the southwest motive is sent to the door, the big guy has to talk about the future development, for the southwest motive this series of Minjiang 85 gas turbines, the navy has always had their ideas.

"I've heard that you're building this gas turbine and are going to use it to drive power generation equipment on a large scale, and according to the plan you put forward, it's really feasible, but as for the Three Gorges Project, our military has never supported it. ”

Beckoning the secretary to put the tea on the table, he got up again from his desk and sat down on the sofa in the reception area, and began to talk about his old man's concerns.

"As I heard before, the Minjiang series of gas turbines have the possibility of continuing to increase the power, then I still ask a word, whether it can replace the LM-2500 gas turbine currently used on the 052, if it works, then give a letter of approval, when can it be installed and used. ”

The ability of Southwest Motive is still relatively reliable, Qingcheng engine project is one of the few perfect ending projects in the cooperation between the Republic and European and American military equipment in the eighties, and Southwest Motive took over the Turbo 3C domestic version of the turboshaft 6 engine has also been successfully installed and finalized, mixed and matched in the previous imported ultra Wasp helicopter power use, the effect is good, and the chain has not dropped.

So at this time, the big guy felt that he could put pressure on Southwest Motive again, and Rolls-Royce was able to change the SM-1 gas turbine with a power of 14 megawatts based on the TF-41, and then increased the power of the SM-1 to 18 megawatts, which is basically the same as the early model of LM-2500 used in 052A.

Now the situation is that Southwest Motor has the Qingcheng engine at hand, which is a power system with more thrust than the TF-41, and no one believes it to say that it can't be changed into an 18-megawatt gas turbine.

"Can be changed, of course can be changed, the Minjiang 85 gas turbine is for the ultra-long life of the ground generator set, so the power is deliberately reduced, but even if we do not make major changes in the current design, just modify some of the engine accessories, adjust the output power, can easily reach 12 megawatts. ”

Wang Zhengguo replied.

The figure of 12 megawatts is actually not high, and even such a power output will not have much impact on the service life of the crew on the ship, after all, this gas turbine was born from a large body like the Qingcheng engine, and the physique is there.

However, this data does not meet the needs of the Navy, and there is obviously a large gap between the two to replace the current LM-2500 gas turbine unit in the same class.

"This is not enough, the Navy requires that the power must reach the same level as the LM-2500 gas turbine equipped on the 052, I can tell you clearly, the current 052 equipped with the LM-2500 gas turbine power is 20.5 megawatts, can you do it?"

It's really a headache data, to make the Minjiang series of gas turbines achieve the same data, Wang Zhengguo feels a headache, this is not easy to do, unless....

"Yes, yes, the Minjiang series of gas turbines for medium-scale improvement, if the power is not reduced, with the current strength of the southwest engine, the maximum power can be roughly achieved to about 17 megawatts, and then coupled with intercooling technology, after improving thermal efficiency, the power of a single unit can reach 20 megawatts. ”

Wang Zhengguo is very sensible, he just proposed to use medium cooling technology, not medium cooling to heat up, there is a very big difference.

The so-called "intercooling reheating", in fact, the correct way to interpret should be the "intercooling-reheating" technical solution, the "intercooling" and "reheating" are two unrelated technologies, they can actually exist separately from the other party.

The "intercooling" technology of gas turbine is to improve the efficiency of gas turbine by cooling the air between the low-pressure compressor and the high-pressure compressor to reduce the temperature before the air participates in combustion.

When it comes to "recuperation" technology, this thing is to recover the energy of high-temperature gas discharged by gas turbines, and there is no essential connection between the two.

Gas turbine intercooling technology can improve thermal efficiency, but it is not as good as the "intercooling-recuperation" technology at the same time, but fortunately, intercooling technology is easy to implement, as long as an air cooling system is added between the high and low compressors.

Now United Power Energy Group can engage in the use of "intercooling-recuperation" technology on land, which is not afraid of volume limitations, but if you really want to use it on ships, in the narrow power compartment of warships, in fact, you can install a set of "intercooling" devices at most, if it is a larger recuperation system, you really don't have to think too much, it is completely impossible.

"If this power system wants to increase the intercooler, in terms of volume and weight, it mainly depends on the military's power choice. If we still follow the current 052 destroyer's diesel-fuel alternate route, we can fully integrate the intercoolant into the engine case, and if we take the full combustion propulsion similar to the Burke-class, it is a different solution. ”

The biggest problem that the intercooling system needs to solve is how to refrigerate, and then the exchange of cold and heat can be realized.

However, the problem with them is that the whole system is large and cumbersome to maintain, and the advantage is that it can be used for a long time without restrictions, and the whole process from the departure of the warship to the return voyage is stress-free, and it is suitable for all-fuel propulsion solutions, as was the case with the famous R-21 gas turbine decades later.

"Full combustion propulsion? That is definitely impossible, the 052 series, whether it is now or in the future, can only be the alternation of diesel fuel, this is the tone that the Navy has already set, and it is impossible to change. ”

The big guy now knows very well that the alternation of firewood and burning in 052 must continue, and there is no possibility of any change in this technology, so the answer is very positive.