Compared to early 2019 when this thread was first started, the landscape of Chinese marine gas turbine remained the same in terms of models in serial production, but structurally it's much different. AECC is now independent from AVIC, CSIC is now merged with CSSC and their marine propulsion and power division is called CSIC Power.
AECC seems to have given up on the marine propulsion market. All their gas turbine models are listed as for power generation use on their website. I have always suspected their QC designation stands for Qing(Light) Chuan(Ship) and QD stands for Qing(Light) Dian(Electricity). All their aeroderivative turbines are now listed as QD. I guess with the merger of CSIC and CSSC, it is now unlikely for an outsider like AECC to break into the marine propulsion business.
According to CSIC Power's 2021 Annual Report, released early this year, they are developing three new marine gas turbines. One is 15MW (GT15 mentioned in the first post of this thread), one is 40MW (GT25000IC). The third is somewhere in the middle. I guess 21MW because 1) that's the power rating of the gas turbine mentioned in Type 076's RFP documents and 2) it's in the middle between 15MW and 25MW. All three models have engineering sample (样机) built and under testing.
Does anyone have information/brochure/specification on CHD620 diesel generator for submarine that they can share in comparison with MTU396 diesel generator? Is CHD620 engine have proven operation on submarine?
Understood your point, thanks.Hechai manufactures both original Deutz-MWM TBD620 and their own CHD620 engines. My guess is the ToT agreement gives Hechai IP rights over any improved variants they develop from TBD620 if certain performance parameters are met. Very common practice.
Since the engine offered to Thailand is referred to as "CHD620" not "TBD620" that means it's one of Hechai's improved variants. At least it should have high pressure common rail injection. Maybe sequential turbo-charging as well, not sure. Hechai's webpage on CHD620/622 is completely blank, so no specs sheet. Technologically it's certainly more advanced than MTU396, which is an ancient design by now (MTU is promoting MTU 4000 for new submarines).
We know from official press release that the newest variant of the series, the 4MW class CHD622V20BCR, will be used on next generation Chinese unmanned underwater vehicles. But we have no information on whether any engine of the series has been used on manned submarines. But I see the move toward CHD620/622 series as inevitable. MTU396 is really getting dated now and there's no chance China will get the licenses for U83, the submarine variant in MTU 4000 series.
I don't think anyone from China's side can answer your question or concern. The Chinese builder does not own MTU production, there is nothing they can do if Germany blocked it. CHD620 is the only alternative that China can provide if Thai Navy still want to the sub.Understood your point, thanks.
However, across the Social Network, many Thais are worried and expressing concern that the decision to use the CHD620 in their S26T submarine would have been some sort of a guinea-pig scenario where even the PLA Navy still haven't use this engine in one of their own submarine. How can we be sure that the CHD620 is safe for submarine operation in comparison to the proven MTU396.
This is the question to Thai Navy really.Please don't be mistaken that I mean Chinese-Made Diesel Engine is not good in quality, just want to know how the engine would be certified and compliance with Royal Thai Navy requirement of "Better or Equivalent" to the MTU396.