A nearly zero energy building (NZEB) can achieve significant energy saving by reducing its air-conditioning load greatly. At the same time, an NZEB should also achieve a comfortable thermal environment. In this paper, a parallel-pipe type natural heat transfer air-conditioning terminal device is proposed and studied for use in NZEB. The terminal device is able to provide both heating and cooling (including sensible and latent cooling) for a building without noise or air disturbance. The advantages of the terminal device have been demonstrated by comparing with other air-conditioning terminals. Experimental data of the heating and cooling performance of the device under different operation conditions were collected and analysed. The calculation models for the heating and cooling capacities of the device were obtained through data regression analysis, and the flow resistance curve of the device was obtained by means of experimental measurement under various flow rates. In addition, comparison was made on the heating and cooling capacities between the device and a radiant floor that also features little noise or air disturbance. Results show that the heating and cooling capacities of the device were 41.5% and 46.8% higher than the maximum capacities of the radiant floor, respectively. This research laid a foundation for the engineering application of the air-conditioning terminal device.

中文翻译：

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近零能耗建筑平行管式自然传热空调末端装置的热流阻特性

近零能耗建筑（NZEB）可以通过大幅降低空调负荷来实现显着的节能。同时，NZEB还应实现舒适的热环境。本文提出并研究了一种用于NZEB的平行管式自然传热空调末端装置。终端设备能够在没有噪音或空气干扰的情况下为建筑物提供加热和冷却（包括显冷和潜冷）。通过与其他空调终端的对比，展示了终端设备的优势。收集和分析了装置在不同运行条件下的加热和冷却性能的实验数据。通过数据回归分析得到装置的制热制冷量计算模型，并通过实验测量在各种流量下得到装置的流阻曲线。此外，还对设备和辐射地板之间的加热和冷却能力进行了比较，该辐射地板也具有很少的噪音或空气干扰。结果表明，该装置的加热和冷却能力分别比辐射地板的最大能力高41.5%和46.8%。该研究为空调末端装置的工程应用奠定了基础。对设备和辐射地板之间的加热和冷却能力进行了比较，辐射地板也几乎没有噪音或空气干扰。结果表明，该装置的加热和冷却能力分别比辐射地板的最大能力高41.5%和46.8%。该研究为空调末端装置的工程应用奠定了基础。对设备和辐射地板之间的加热和冷却能力进行了比较，辐射地板也几乎没有噪音或空气干扰。结果表明，该装置的加热和冷却能力分别比辐射地板的最大能力高41.5%和46.8%。该研究为空调末端装置的工程应用奠定了基础。