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三峡蓄放条件下御临河口水动力特性研究
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作者 龙明梅 艾海男 +3 位作者 刘步云 何强 孙兴福 李宏 《水资源研究》 2017年第4期357-369,共13页
随着三峡水库的周期性运行,库区支流河口水动力特性发生相应变化,水体稀释自净能力减弱,水环境容量降低,进而影响支流水质和库区饮用水安全。研究三峡工程蓄、放条件下支流河口的水动力特性,提出改善水动力条件的有效措施,对于改善库区... 随着三峡水库的周期性运行,库区支流河口水动力特性发生相应变化,水体稀释自净能力减弱,水环境容量降低,进而影响支流水质和库区饮用水安全。研究三峡工程蓄、放条件下支流河口的水动力特性,提出改善水动力条件的有效措施,对于改善库区支流水质状况、保证供水安全具有重要作用。本文选择三峡库区一条支流-御临河为研究对象,模拟其河口在蓄、放周期内的水动力特性变化,分析了水动力学演变规律。研究结果表明,在蓄水期,河口表层的平均速率为0.026 m/s,底层的平均速率为0.027 m/s,整体流速较慢,影响污染物扩散,需加强面源的控制,防止营养物质蓄积导致次年气温升高产生水华现象;在放水期,河口表层的平均速率为0.21m/s,底层的平均速率为0.034 m/s,虽然表层流速较大,但底层流速与蓄水期相差不大,有可能导致营养盐、重金属在底层蓄积。 展开更多
关键词 三峡水库 蓄放过程 御临河口 水动力特性
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Mathematical Modelling of Charge/Discharge Process in Seasonal Heat Storage Tank
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作者 Ladislav Boszormenyi Emese Sivakova Roman Vodicka Peter Kapalo 《Journal of Energy and Power Engineering》 2014年第3期495-501,共7页
The seasonal heat storage tank is the most important component of the SDH (solar district heating) system, which allows significant increase in the share of solar energy in heat supply in comparison with conventiona... The seasonal heat storage tank is the most important component of the SDH (solar district heating) system, which allows significant increase in the share of solar energy in heat supply in comparison with conventional solar systems with short-term accumulation of heat. The adverse impact of their investment sophistication on competitiveness may be compensated by the increased use. For example: Cooperation with heat pump allows to increase the accumulation capacity of the seasonal heat storage tank and causes the direct use of heating energy and accumulation of cooling energy produced by heat pump. In the final stage of the heating period, it can be used to remote cooling supplied buildings. Experimentation on mathematical model is possible to obtain valuable insights about the dynamics of the processes of charging and discharging in the seasonal storage tank and subsequently used in the design, implementation and operation. 展开更多
关键词 One seasonal heat storage temperature stratification.
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