| CO_2跨临界水水热泵气体冷却器研究 |
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| 引用本文： | 李敏霞,马一太,杨俊兰.CO_2跨临界水水热泵气体冷却器研究[J].太阳能学报,2008,29(12). |
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| 作者姓名： | 李敏霞 马一太 杨俊兰 |
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| 作者单位： | 天津大学热能研究所,天津,300072 |
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| 基金项目： | 天津市自然科学基金
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| 摘 要： | 为提高CO2跨临界循环水-水热泵的效率,对气体冷却器进行了研究.对原有管壳式气体冷却器建立了模型并计算了该气体冷却器沿管长的温度分布.对该气体冷却器进行了实验研究,并改变结构参数以提高气体冷却器的换热效率.计算结果显示CO2侧的换热系数沿管路存在峰值,但要低于水侧的换热系数,主要原因是流量小.增加换热管长,并减小管数,有利于管内换热系数的提高,而且压力降在可接受的范围.通过实验与计算值的对比,CO2出口温度计算偏差小于9%,水温出口温度计算偏差小于5.3%.
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| 关 键 词： | 换热系数 气体冷却器 |
STUDY ON GAS COOLER OF CO_2 TRANSCRITICALCYCLE WATER SOURCE HEAT PUMP |
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| Li Minxia,Ma Yitai,Yang Junlan.STUDY ON GAS COOLER OF CO_2 TRANSCRITICALCYCLE WATER SOURCE HEAT PUMP[J].Acta Energiae Solaris Sinica,2008,29(12). |
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| Authors: | Li Minxia Ma Yitai Yang Junlan |
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| Affiliation: | Li Minxia Ma Yitai Yang Junlan (Thermal Energy Research Instiuae of Tianjin University,Tianjin 300072,China) |
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| Abstract: | The gas cooler was studied to improvement of CO_2 transcritical cycle water source heat pump.The model of the primary shell-tube gas cooler was set up,and the temperature distribution of the gas cooler along the tube was calculated. The experiment were conducted to test the performance of the gas cooler.The structure parameters were verified to im- prove the efficiency of the gas cooler.The calculated results show that there exists a maximum transfer coefficient of CO_2 side along the tube,but the hear tran... |
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| Keywords: | CO2 |
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