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Chapter 1502 Integrated Electric Propulsion System

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    What Zhuang Jianye said is not an exaggeration at all.

    Take the "Kuznetsov" aircraft carrier of the Russian Navy, the sibling of the "Varyag" aircraft carrier that is currently undergoing modification at a large shipyard in the north, as an example. It has a displacement of 60,000 tons, uses a four-axis propulsion system, and is equipped with  Eight high-pressure boilers drive four steam turbines.

    The total power is 134 megawatts, equivalent to 180,000 horsepower.

    It can propel the "Kuznetsov" aircraft carrier to have a 30-knot aircraft carrier and an endurance of 18 knots and 8,500 nautical miles.

    There is not much difference in performance between the "Varyag" aircraft carrier and the "Kuznetsov". At most, the quality of the high-pressure boiler is better, but overall it can only maintain a power output of about 200,000 horsepower. At most, the aircraft carrier can  It has a maximum speed of 32 knots.

    But the proportion of huge high-pressure boilers and steam turbines has not changed; the high fuel consumption and low efficiency of this traditional power have also not changed.

    If the D-71m gas turbine is used, it will be a completely different situation.

    The maximum output of a single unit is 35 megawatts, equivalent to 46,935 horsepower. Four units in parallel are 140 megawatts, equivalent to 187,000 horsepower.

    Although compared with the 200,000 horsepower provided by the new domestic high-pressure boiler and steam turbine used by the "Varyag" aircraft carrier under renovation, it is slightly inferior.

    But it is much stronger than the 134 megawatts and 180,000 horsepower of the Russian Navy's "Kuznetsov" aircraft carrier.

    At the very least, there is no problem in maintaining a speed of 30 knots for such a big ship with a displacement of 60,000 tons.

    However, the most critical issue is not the issue of speed and power, but the issue of space occupancy and usage efficiency.

    The total weight of a single d-71m gas turbine is only 27 tons, and the four units together are only 108 tons, which is less than half the weight of the power combination of high-pressure boiler and steam turbine used on the "Varyag". As for space utilization  Needless to say, compactness is called exquisite.

    The space and weight saved, whether it is increasing the number of carrier-based aircraft or equipping it with more fuel and ammunition, is the most direct improvement to the combat effectiveness of the aircraft carrier.

    What's more, the fuel economy and flexibility of gas turbines are much better than steam turbines. At least when starting up, there won't be the long warm-up time of steam turbines, so that after the aircraft carrier docks, at least four  The boiler cannot be turned off in order to maintain the aircraft carrier's ability to quickly start and leave port.

    This is equivalent to burning money on a daily basis for no reason.

    The gas turbine is different. It starts up very quickly. There is no need to maintain operation when docking. It can be shut down completely. This is also very friendly to the daily maintenance and cost maintenance of the ship. At least it does not need to do anything, and the expenses are also expended along with the fuel.  flow.

    Of course, to achieve this effect, the power of the gas turbine must be increased, at least 30 megawatts, to barely meet the threshold of aircraft carrier driving.

    Don¡¯t even think about the 20-megawatt level. After all, if an aircraft carrier has a speed lower than 25 knots, it is not an aircraft carrier, but a real living target wandering on the sea.

    Fortunately, China's Tengfei D-71M gas turbine has reached the 30-megawatt level. Because of this, the executive deputy team leader can no longer be described as happy, but completely excited.

    Originally, even the power of the mass-produced destroyers was worrying, but now it is better, and the power devices on the aircraft carriers have been lost again.

    The sudden feeling of happiness almost made the executive deputy team leader faint.

    Of course, although the executive deputy team leader is excited, he also knows that although the D-71m gas turbine is not a problem in theory as an aircraft carrier power, it requires a series of adjustments and running-in to achieve it.

    After all, the power of aircraft carriers is very complex, and coupled with the updates and iterations of supporting equipment, the demand for power is very different from the past.

    Although domestic steam turbines are lagging behind, they are not a problem for driving large aircraft carriers. Coupled with mature technology and manufacturing cost advantages, they are sufficient for a modified aircraft carrier.

    But for the next generation of large aircraft carriers that are going to use DC motor propulsion and electromagnetic catapults, this powertrain is somewhat out of date.

    The executive deputy team leader who once served as the leader of the Navy's equipment department knew very well that the Navy's plan for the new generation of aircraft carriers at that time was to use nuclear power, which could be achieved in one step.

    However, this plan is highly controversial within the Navy.

    The main reason is that the technical requirements of nuclear power are too great, and there is no relevant experience in the country. If it is done in one step, there is nothing to say. If it is done all at once, the gain will outweigh the loss.

    Just like the French aircraft carrier "Charles de Gaulle", it is euphemistically called the world's second nuclear-powered aircraft carrier, but it turns out that it uses a reactor on a nuclear submarine, so that "De Gaulle"The speed of the ??? was only a pitiful 25 knots. If it was slightly faster, either the nuclear reactor shell would be cracked or the direct power assembly would be damaged.

    Anyway, I will die for you.

    As a result, the world's second nuclear-powered aircraft carrier can only use 25 knots, a speed that cannot even be blown by the wind on the deck, to demonstrate France's slow and fast majesty.

    It simply made the men in Paris silent and the women in tears!

    Because of this, many insightful people in the Navy hope to have a transitional type between steam turbines and nuclear power, so as to drive the integrated power system, propel the aircraft carrier to high speed, and at the same time provide sufficient electrical energy to the electromagnetic catapult device.

    It¡¯s just that at the time of the discussion, there wasn¡¯t even a decent high-power gas turbine in China, so the transitional model seemed reasonable, but it was unrealistic.

    So the issue of power for the next-generation aircraft carrier has been debated since the return of the "Varyag" to the present.

    The executive deputy team leader is a typical backbone of the aircraft carrier power transition group. According to his understanding, the most important thing for a large offensive weapons platform such as an aircraft carrier is the stability of the platform. If something goes wrong every three days, it is not good equipment.  It's a grinder.

    Therefore, he felt that the nuclear industry should be given more time to polish nuclear power to maturity. He could even learn from Russia and use one or two types of nuclear-powered icebreakers to put naval nuclear power into use and accumulate enough experience before boarding ships.  Not too late.

    However, there was no suitable transition model between steam turbines and nuclear power at that time. Even if the executive deputy team leader¡¯s opinions were pertinent, they were not feasible to implement.

    But now, China¡¯s takeoff D-71m gas turbine has filled the gap between steam turbines and nuclear power, making the executive deputy team leader see the hope of transitional power for large aircraft carriers!

    Because of this, the executive deputy team leader spoke frankly to Zhuang Jianye and asked directly: "Mr. Zhuang, is there any room for increasing the power of your D-71m gas turbine? It would be better if it could reach the 40 MW level.  , you have to know that some large surface ships with a displacement of about 80,000 tons have very high power requirements, especially the new integrated electric propulsion system. The current D-71m gas turbine can only barely reach the passing mark!"

    Zhuang Jianye nodded: "Our next stage of D-71t gas turbine is expected to reach the 40 MW level, but the current D-71M gas turbine's ultimate power can also reach 38 MW. If extreme power output is not required, I  I think the combined power of the D-71m gas turbine and our D-65f 12-megawatt gas turbine should be enough to drive a large surface ship of 80,000 to 100,000 tons!"

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