权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Basic Study on MHD Power Generation System by Using High Density Liquid-Metal Two-Phase Natural Circulation

高密度液态金属两相自然循环磁流体发电系统基础研究

基本信息

批准号：
04452328
负责人：
SAITO Masaki
金额：
$ 3.01万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452328/
关键词：
high density liquid-metal two-phase natural circulation MHD power generation void fraction gas-liquid slip ratio cycle efficiency two-phase flow pattern エリクソンサイクル鉛・ビスマス系低融点合金低融点合金

项目摘要

Fundamental characteristics of an advanced energy conversion system using high density two-phase natural circulation combined with liquid-metal MHD power generation were investigated theoretically and experimentally.The cycle analysis performed to examine the sensitivities of the performance characteristics to the system parameters such as system temperatures, void fraction and gas-liquid slip ratio at the two-phase flow section, efficiencies of the components for the various combinations of the working fluids, shows that the cycle efficiency of the present system is competitive with those of the conventional steam-turbine and gas-turbine cycles. More than 50 - 60 % of cycle efficiency may be expected for the heat source with 1000 C.It is, however, found that the cycle efficiency depends strongly on the gas-liquid slip ratio at the two-phase flow section and also on generator efficiency.In the basic experiments on the heavy metal two-phase natural circulation performed by woods-metal and nitrogen gas, the effect of the MHD power load on the gas-liquid slip ratio or the void fraction at the two-phase flow section were investigated. It is found from the present experiment that the void fraction at the two-phase flow is mainly determined by the force balance between the pressure drop at the generator and the buoyancy of the two-phase section.The results of the present study are encouraging for future studies in the application of the present system to high temperature nuclear power plants.

对高密度两相自然循环与液态金属磁流体发电相结合的先进能量转换系统的基本特性进行了理论分析和实验研究，通过循环分析考察了系统性能对系统温度、两相流截面空隙率和气液滑移比等参数的敏感性，用于工作流体的各种组合的部件的效率表明，本系统的循环效率与常规蒸汽涡轮机和燃气涡轮机循环的循环效率相比具有竞争力。对于1000 ℃的热源，循环效率可达50 - 60%以上，但循环效率与两相流段的气液滑移比和发生器效率密切相关，在木材-金属和氮气进行的重金属两相自然循环的基础实验中，研究了磁流体功率负载对两相流截面气液滑移率或含气率的影响。实验结果表明，两相流中的含气率主要取决于发生器压降与两相段浮力之间的力平衡关系，这一结果为该系统在高温核电站中的应用提供了依据。