1、PDF外文：http:/ 毕业设计外文翻译 原 文 标 题 ： Proposal for a high efficiency LNG power-generation System utilizing waste heat from the combined cycle 中文标题 :一个高效 的利用 液化天然气 联合循环 余热的 发电系统 学生姓名： 鲁荣升
2、; 学院名称： 能源与动力工程学院 专业名称： 热能与动力工程 班级名称： 热动 0941 学 号： &nbs
3、p;0903411120 指导教师： 王兴国 教师职称： 副教授 学 历：
4、 硕士研究生 2013 年 5 月 - 2 - Proposal for a high efficiency LNG power-generation system utilizing waste heat from the combined cycle Y. Hisa
5、zumi*, Y. Yamasaki, S. Sugiyama Engineering Department, Osaka Gas Co., 1-2 Hiranomachi 4-chome Chuo-ku, Osaka 541, Japan Accepted 9 September 1998 Abstract High-efficiency power-generation with an LNG vaporizing system is proposed: it utilizesthe LNG's cold energy to the best potential lim
6、it. This system can be applied to LNG vaporizers in gas companies or electric power companies and recovers the LNG's cold energy as electric power. The system consists of a Rankine cycle using a Freon mixture, natural-gas. Rankine cycle and a combined cycle with gas and steam turbines. The heat
7、sources for this system are the latent heat from the steam-turbine's condenser and the sensible heat of exhaust gas from the waste-heat recovery boiler. In order to find out the optimal condition of the system, several factors, such as gas turbine combustion pressure, steam pressure, condensing
8、temperature in combined cycle, composition of mixture Freon, and natural gas vaporizing pressure are evaluated by simulation. The results of these studies show that in the total system, about 400 kWh can be generated by vaporizing 1 ton of LNG, including about 60 kWh/LNG ton recovered from the LNG c
9、old energy when supplying NG in 3.6 MPa. About 8.2MWh can be produced by using 1 ton of LNG as fuel, compared with about 7 MWh by the conventional combined system. A net efficiency of over 53%HHV could be achieved by the proposed system. In the case of the LNG terminal receiving 5 million tons of LN
10、G per year, this system can generate 240 MW and reduce the power of the sea water pump by more than 2MW. 1998 Elsevier Science Ltd. All rights reserved. - 3 - 1. Introduction In the fiscal year 1994, the amount of LNG imported to Japan reached about 43 million tons； of thi
11、s 31 million tons were used as fuel for power generation. As shown in Fig. 1, about 20% of the LNG imported was used for power generation 2. Fig. 2 shows the major LNG power generation systems now in operation and their outputs. Several commercial LNG power generation plants have been constructed si
12、nce 1979, and their total output has reached approximately 73 MW. Among the new power-generation plants without CO2 emission, this value of 73 MW is second to the 450 MW input of geo-thermal power generation plants in Japan, with the exception of power generation by refuse incinerators, and is much larger compared with the 35 MW output of solar-power plants and the 14 MW output of wind-power stations. Table 1 shows the LNG power generation plants constructed in Japan. The economics of LNG power generation became worse as the appreciation of the yen made
