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首页> 外文期刊>Energy Conversion & Management >Experimental study of performance of a dry cooling and dedicated ventilation (DCDV) system under different space cooling load conditions
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Experimental study of performance of a dry cooling and dedicated ventilation (DCDV) system under different space cooling load conditions

机译：不同空间制冷负荷条件下干冷专用通风（DCDV）系统性能的实验研究

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摘要

The use of DCDV system for decoupling dehumidification from cooling to achieve energy saving objective for air-conditioning of office environments in Hong Kong was confirmed effective based on simulation studies by the authors. However, given that simulation typically assumes a perfect control and feedback system, whether or not the benefits of DCDV system can be realized in practice, in particular under various space part load ratio (PLR) and sensible heat ratio (SHR) conditions, is subject to experimental verifications. In this study, a prototype which could be switched between the proposed DCDV system mode and the conventional system mode was constructed in a test facility for laboratory experiments. Through two sets of identical experiments under various space cooling load conditions, it was found that if compared to the conventional system, DCDV system could perform slightly better in achieving the desired indoor condition and in reducing the moisture-related air quality problems, but would result in 1-3% higher in cooling output. As for the overall coefficient of performance (COP_o), the DCDV system was found performed better by 5.6-7.2%. Additional experimental analysis was conducted for the development of a prediction model to relate the possible condensation period (ψ) on the DC coil with different operating parameters.
机译：根据作者的模拟研究，已证实使用DCDV系统将除湿与制冷分离，以实现香港办公环境的空调节能目标。但是，考虑到模拟通常假设一个完美的控制和反馈系统，因此是否可以在实践中实现DCDV系统的优势，尤其是在各种空间部分负荷率（PLR）和显热率（SHR）条件下都存在问题。进行实验验证。在这项研究中，在用于实验室实验的测试设施中构建了可以在建议的DCDV系统模式和常规系统模式之间切换的原型。通过在各种空间制冷负荷条件下进行的两组相同的实验，发现与传统系统相比，DCDV系统在实现所需的室内条件和减少与湿度有关的空气质量问题方面可以表现出更好的性能，但会导致冷却输出提高1-3％。至于总体性能系数（COP_o），发现DCDV系统的性能更好，为5.6-7.2％。为建立预测模型进行了附加的实验分析，以将直流线圈上可能的凝结时间（ψ）与不同的工作参数相关联。

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