This paper deals with a new electronically controlled marine two-stroke diesel engine and TES (Thermal Efficiency System) tuning applicable to future marine carriers. Demand for prime movers for marine applications centers on the following four points:
1. Compliance with future more-stringent emission regulations;
2. Increase of Engine Output for large, high-speed vessels;
3. High thermal efficiency;
4. High reliability and safety.
As the best way of meeting this market demand, we propose application of the Mitsui-MAN B&W Electronically Controlled Diesel Engine with TES tuning. The Thermal Efficiency System is a diesel engine combined with a Turbo Generator and Turbo Compound System to increase the total thermal efficiency of the ship. The Thermal Efficiency System is an essential technique for reducing CO2 emission levels of ships.

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For the global environment protection, it is expected that the household co-generation systems that have high conversion efficiency, namely, high reduction rate in CO_2 emissions. Low installation volume and high net working rate suitable for the Japanese residences hold the key to the success of the household co-generation systems. In order to realize such systems, it is necessary to develop small-size and high-efficiency Stirling engines. Free piston Stirling engines with integrated linear alternators have the potential to realize compact size and high efficiency due to low mechanical loss. Aiming to develop a household co-generation system that achieves the conversion efficiency of 25% and the total efficiency of 90%, a free piston Stirling engine with an integrated linear alternator is being developed.

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In recent years, biodiesel fuel (Hereinafter, BDF fuel) that can be used as a diesel fuel substitute fuel has attracted attention from the viewpoint of prevention of global warming. As a commecial method of BDF fuel, by using vegetable fats and oils as a raw material, chemical treatment such as methyl esterification (alkali catalytic method) is carried out and impurities are removed in a subsequent refining step to produce be done. However, if this chemical treatment is inadequate as incomplete combustion can occur that can not burn BDF fuel.

Therefore, in order to remedy this drawback, we used BDF fuel refined on the other hand, research process as a BDF fuel for a diesel engine and verified the exhaust gas concentration. We concluded that refine BDF, process as mixed BDF fuel can improve NO_x and CO value (using small generator).

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In recent years, biodiesel fuel (Hereinafter, BDF fuel) that can be used as a diesel fuel substitute fuel has attracted attention from the viewpoint of prevention of global warming. As a commecial method of BDF fuel, by using vegetable fats and oils as a raw material, chemical treatment such as methyl esterification (alkali catalytic method) is carried out and impurities are removed in a subsequent refining step to produce Be done. However, if this chemical treatment is inadequate as incomplete combustion can occur that can not burn BDF fuel.
Therefore, in order to remedy this drawback, we used BDF fuel refined on the other hand, research process as a BDF fuel for a diesel engine and verified the exhaust gas concentration. We concluded that refine BDF, process as mixed BDF fuel can improve NO_x.CO value using small generator.

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In this study, we compared performance for a multistage Stirling engine and a steam engine for a wast heat recovery system. The multistage Stirling cycle and the simple Rankine cycle were analyzed at ideal cycles. It was shown that Stirling engine was able to improve the waste heat recovery efficienciy to make it to the multistage by two steps or more. We discussed waste heat application using the diesel engine of 750kW. It was shown to obtain the waste heat recovery efficienciy of about 7% at the multistage Stirling engine and the steam engine. When all of the wast heat were not able to be collected because the installation space was small, it was clarified that the Stirling engine was higher efficiency compared with the Rankine cycle.

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Aiming at reduction of the energy consumed in domestic use, research and development of an energy system corresponding to ZEH (Zero Energy House) is advanced. The authors are developing a hybrid heat source Stirling engine combined heat and power system, which uses solar and woody biomass for a heat source. In this paper, summary of the 1kW solar Stirling power generation system and a solar tracking type collector using the Fresnel lens are described. And heating method of heater and design of solar power generation system are considered.

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日本は使用する天然ガスの大部分をLNGとして輸入している。LNGの冷熱エネルギーは一部が空気の液化分離や冷熱発電などに利用されているが、ほとんどの冷熱エネルギーは未利用のまま捨てられている。現状、LNGの低温エネルギーからの発電方法としては、低沸点液体を用いたランキンサイクルが多く用いられているが、効率は10-25%と1MW以上の発電システムとしてはあまり高くない。熱電素子を利用したシステムも提案されているが、発電効率と装置コストに課題がある。進行波型熱音響エンジンは熱エネルギーから音波エネルギーへの変換効率が高く、発電機の機械的/電気的インピーダンスを調整することで高い発電効率を期待できる。熱音響ユンジンは温熱熱源では温度差が110℃程度あれば作動することが報告されているが、LNG冷熱のような低温熱源を用いた駆動例は未だ無い。本報告では冷熱エネルギーを用いて進行波型熱音響エンジンを駆動させ、音響パワーを取り出すことが可能か検証した。

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A recent experimental study has demonstrated the looped tube acoustic engine's operation when connected to a piston-crank-flywheel assembly. The key parameter is the real part of the input acoustic impedance of the loop. In this study, we investigated the acoustic impedance using the equivalent circuit model and discussed the modification of the geometrical parameters of the loop to increase the thermoacoustic energy conversion efficiency and output power. The results are confirmed by a numerical simulation based on the thermoacoustic theory.

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We have developed a low delay video coding technique for use in digital broadcasting of HDTV format pictures. We developed a delay model that analyzes processing time of requisites for video codec. This delay model explicates a general codec delay from encoding-top to decoding-end in 600.8ms and mainly depends on preprocessing and sending and receiving buffers. Based on this model, we develop a technique that reduces the delay of 600.8 to 250ms. We tested our technique using a hardware encoder that operated on a FPGA platform at an operating frequency of 135MHz. This encoder showed a delay of 252ms using a consumer set top box as a decoder.

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