| 摘要: |
| 盐水闪蒸技术广泛应用于海水淡化及海洋温差能发电, 含盐质量分数、给盐液温度和闪蒸压力对闪蒸汽化率和热效率有很大影响。在质量分数为3.5%～20%、给盐液温度为30～95℃和闪蒸压力为1～30 kPa 的范围内, 对NaCl 溶液闪蒸汽化率和热效率等闪蒸效率特性进行了定量计算研究, 研究得到了盐水含盐质量分数、给盐液温度和闪蒸压力对闪蒸汽化率以及热效率影响的规律。结果表明, 降低含盐质量分数, 提高给盐液温度, 降低闪蒸压力可提高闪蒸汽化率与热效率; 含盐质量分数越高,造成的热损失越大, 而提高给盐液温度会增大热损失。 |
| 关键词: 海洋温差能 海水淡化 闪蒸效率 热效率 |
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| 基金项目:国家科技支撑计划项目(2011BAA05B03); 河南省高校骨干教师资助计划(2009GGJS-062) |
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| Numerical study on the characteristics of flash evaporation efficiency of NaCl solution |
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| Abstract: |
| Flash evaporation technology is widely used in desalination of seawater and ocean thermal power generation. Mass fraction of solution, feed salt solution temperature and flash evaporation pressure have great influence on the flash evaporation rate and thermal efficiency. Within the range of salt mass fraction from 3.5% to 20%, feed salt solution temperature from 30℃ to 95℃, and flash evaporation pressure from 1 to 30 kPa, flash evaporation efficiency characteristics of flash evaporation rate and thermal efficiency were calculated and analyzed. The influences of salt mass fraction, feed salt solution temperature and flash evaporation pressure on the efficiency characteristics were discussed. The results showed that the flash evaporation rate and thermal efficiency were increased with the decrease of salt mass fraction. The flash evaporation rate and thermal efficiency were increased with the increase of feed salt solution temperature. However, the decrease of flash evaporation pressure can increase the flash evaporation rate and thermal efficiency. Salt mass fraction and thermal loss were increased with the increase of feed salt solution temperature. |
| Key words: Ocean thermal energy Desalination of seawater Flash evaporation rate Thermal efficiency |
