Marine Power
Marine Power:
As one of the most critical equipment supporting the ship, marine power is a high-tech product integrating electromechanical, information, materials, automation and other technology in one. This research direction centers on the technical requirements of high efficiency, low emission, low noise, high reliability and long life on marine diesel engine, focusing on collaborative innovation and cooperation in five technical directions such as the overall performance and optimization of structural design, efficient combustion and low emissions control, high-pressure common rail fuel injection as well as integrated electrical control, low -noise design, friction, wear and lubrication, etc. Since the IMG has been introducing increasingly stringent regulations on energy conservation, emission reduction and safety, and energy saving diesel engines, LNG/diesel dual-fuel engines, gas engines and other high-end products have become a new growth point of the market, and great efforts are being taken to the development of products with independent intellectual property, taking the R&D of marine diesel engine of our country to the development path supported by core technology.
Achievements:
1. Overall performance and the structure optimization design of Marine diesel engine
Digital prototype technology, dynamic stress analysis technology and
modular design technology have gradually been applied to the design
research and development of advanced models abroad. Foreign research
institutes usually set up each system of diesel engine model with
advanced design techniques; the thermodynamics, kinetics and mechanical
design analyses are usually launched. Next, the overall design of diesel
engine system is determined; then, numerical 3D simulation research for
diesel engine parts movement and detailed design for subsystem will be
conducted. The team of this research completed the first domestic
modular single cylinder diesel engine for ships during the 11th
five-year plan of China, reaching the design requirements with regard to
the performance test and reliability test.
2. High pressure common rail fuel injection and integrated electronic control technology
For many years, HEU has been conducting researches on high pressure
common rail fuel (HPCR) system with regard to simulation and calculation
analysis, the optimization design of key parts such as solenoid valve,
and integrated electronic control technology of diesel engine. So far,
HEU has successfully completed the design of multi-type electric control
system of diesel engine and put into application in batches, providing
technical supports for the design of domestic HPCR system. The ongoing
researches outrank others in China such as HPCR diesel engine oil pump
simulation technology, high-speed solenoid valve calculation and
optimization design technology, integrated electronic control technology
for diesel engine, system thermal redundancy backup and switching
technology, adaptive control of motor speed technology, intelligent
control technology, calibration optimization matching technology and so
on.
3. Ship increased wave resistance and stall prediction method
The current EDDI (Energy Efficiency Design Index) put forward by the
IMO (International Maritime Organization) has included the ship’s
resistance performance in the wave as an assessment. As a result, it
becomes a key index of the new ship design to optimize the ship design
in order to keep the design speed in the wave. Since most of the large
merchant ships sail in low and middle sea conditions, increased
resistance in the short wavelength has become an important parameter to
evaluate the performance of large vessel. HEU has put forward a new
calculation method of increased resistance in the short wavelength based
on the theory of total reflection and has made a proposal of
calculation method of large ship increased wave resistance and stall
prediction on behalf of China.
4. Technology for marine diesel engine with high-efficiency combustion and low emissions
With rounds of new standards or the new specifications frequently
issued by IMO, environmental protection requirements for ships have been
raised constantly. Therefore, nitrogen oxides and sulfur oxide
emissions become urgent topics for one of ship diesel engine researches.
With a combination of machine measure and post-processing technology,
HEU carried out researches on technologies for marine diesel engine with
high-efficiency combustion and low emissions that meet IMO Tier III
emission standard, and broke through the key technology of EGR system,
SCR system for marine diesel engine and the exhaust gas washing
desulfurization system. After having developed SCR system of marine
diesel engine, exhaust gas washing desulfurization system test
prototype, HEU is preparing for a certification from CSC for 4000 kw
diesel engine exhaust gas washing desulfurization system.
5. Marine diesel engine tribology performance prediction and control technology
Tribology in the diesel engine is mainly manifested in the friction,
wear and lubrication of moving parts, with a close relationship with
the diesel engine power performance, economy, reliability and emissions
targets and vibration noise, which has become a key point when
developing high power diesel engine. With independent intellectual
property rights of has piston (ring) component dynamics and tribology
coupling analysis software in the field of diesel engine tribology, HEU
can replace the corresponding modules of foreign commercial softwares.
With intimacy with many domestic enterprises, research institutes, HEU
has a deep and cooperation, and achieved fruitful results in basic
research, active model improvement and development of new models, etc.
6. Ship wave resistance and stall prediction method
According to the current EEDI issued by the IMO, resistance
performance of ships in waves has been included in the evaluation
indices. Therefore, how to optimize the design of the ship design and
sailing in the waves keep speed become the key indicators of new ship
design. Due to the fact that large merchant ships sail most in low sea
state, so wave resistance increase in the short wavelength has become an
important parameter to measure the performance of large ships. Based on
the total reflection theory, the team puts forward a new calculation
method for the resistance in shortwave increases, and put forward a
proposal of wave resistance and stall calculation methods of large ship
on behalf of China.
7. Ship propulsion shafting and device vibration control technology
The IMO has taken the underwater radiation noise as an indicator in
ship evaluation. With the ship's power plant as the first of three major
noise sources, the control of ship power plant especially propulsion
shafting and device vibration becomes the key technology in the field.
Ever since the very beginning, HEU has been doing ship shafting
vibration research and published in domestic field the first shafting
vibration monograph. Now, it has shifted the perspective in the
researches on vibration of shafting and equipment from the previous
security to the reduction of ship underwater radiation noise, with
guidance available for shaft and equipment for vibration control in the
multiple enterprises.
Future Research Directions:
（1）research on low-temperature combustion technology of marine diesel engine;
（2）research on lean premixed combustion technology of ship gas engine;
（3）research on exhaust DeNOx technology of marine diesel engine;
（4）research on exhaust wash and desulfurization technology of marine diesel engine;
（5）research on integration of exhaust DeNOx and desulfurization technology of marine diesel engine;
（6）research on ship propulsion shafting and equipment vibration control technology;
（7）prediction and control technology of tribological performance of marine diesel engine;
（8）research on forecasting design and optimization of the high-pressure common rail fuel injection system;
（9）research on optimizing design technology of key parts such as high-speed solenoid valve;
（10）research on optimizing design and implementation technology of diesel embedded control system;
（11）research on intelligent control technology of diesel engine;
（12）research on integrated electronic control technology based on multi-objective optimized diesel engines;
（13）Research on dynamic strength analysis of key components of marine diesel engines.