The empirical study of a four-row heat pipe heat exchanger to predict the year-round energy recovery in the tropics
The empirical study of a four-row heat pipe heat exchanger to predict the year-round energy recovery in the tropics
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DOI：
10.1177/0143624410397919
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发表时间：
2011-02
影响因子：
1.7
通讯作者：
Y. Yau;M. Ahmadzadehtalatapeh
中科院分区：
文献类型：
--
作者：
Y. Yau;M. Ahmadzadehtalatapeh
在热带地区研究了热管换热器对热回收的影响。对换热器运行一周内(168h)的性能进行了监测，得到了换热器的性能特性曲线。测试了2、2.2和2.5m/S三种盘管表面速度，并将回风温度控制在24°C，利用相关经验公式对全年热管换热器的能量回收进行了逐小时预测。研究了内部设计温度对换热器热回收的影响。基于Efficient-NTU方法对热管换热器的热工性能进行了数值模拟，并将理论值与实验值进行了比较。实际应用：提高采暖、通风和空调系统的性能对设计者来说是一个挑战。这项研究工作的结果可以为打算在热带气候下运行的供暖、通风和空调系统中使用热管换热器的工程师提供实用指南。工程师和研究人员有可能使用推荐的经验性能公式来检查热管换热器对当前空调系统性能的影响。此外，这些经验性能方程能够真实地预测热管式换热器全年运行的节能效果。
The effect of heat pipe heat exchanger on the heat recovery was studied in the tropics. The performance of the heat exchanger was monitored during the one week of operation (168 h) to find out the performance characteristic curves. Three coil face velocities namely, 2, 2.2 and 2.5 m/s were tested and the temperature of return air was controlled at 24°C. The relevant empirical equations were then employed for the hour-by-hour prediction of the energy recovery by the heat pipe heat exchanger for the whole year. The impact of inside design temperature on the heat recovery by the heat exchanger was also studied. The thermal performance of the heat pipe heat exchanger was simulated based on the effectiveness-NTU method and the theoretical values were compared with the experimental data. Practical application : Performance improvement of the heating, ventilating and air conditioning systems is a challenge to the designers. The results obtained from this research work could serve as a practical guide for engineers who are intending to use heat pipe heat exchangers in the heating, ventilation and air conditioning systems operating in tropical climates. Engineers and researchers have the potential to use the recommended empirical performance equations to examine the impact of heat pipe heat exchangers on the performance of the current air conditioning systems. Moreover, these empirical performance equations enable the year-round operating effect of heat pipe heat exchangers on energy savings to be predicted realistically.