热能与动力工程专业外文翻译中英对照英汉互译.doc

核准通过，归档资料。 未经允许，请勿外传！ 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 学院名称： 能源与动力工程学院 专业名称： 热能与动力工程 Proposal for a high efficiency LNG power-generation system utilizing waste heat from the combined cycle Y. Hisazumi*, 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 LNGs cold energy to the best potential limit. This system can be applied to LNG vaporizers in gas companies or electric power companies and recovers the LNGs 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 sources for this system are the latent heat from the steam-turbines 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 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 cold 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 LNG 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. 1. Introducti