Numerical evaluation on energy saving potential of the photovoltaic fresh air preheating system in different climate regions of China
Numerical evaluation on energy saving potential of the photovoltaic fresh air preheating system in different climate regions of China
复制标题
我国不同气候区域光伏新风预热系统节能潜力数值评价
DOI：
10.1016/j.applthermaleng.2019.03.108
复制
发表时间：
2019-05
影响因子：
6.4
通讯作者：
Luo Yongqiang
中科院分区：
文献类型：
--
作者：
Zhang Yelin;Liu Zhongbing;Wu Zhenghong;Zhang Ling;Luo Yongqiang
建筑物的新风系统消耗大量的能源。利用太阳能预热新风可以有效地降低建筑能耗。将光伏光热系统与空气处理机组新风系统相结合，利用光伏电池发电的同时预热新风，为建筑物提供新风。基于控制容积法和分区法，建立了适用于光伏新风预热系统真实的运行工况的动态模型。在长沙建立了光伏新风预热系统试验平台并进行了试验。利用真实的工况数据对模型进行了验证，模拟结果与实验数据吻合较好。分析了长沙、北京、沈阳和拉萨4个典型城市不同气候区的光伏新风预热系统的性能及其节能潜力。结果表明，太阳辐射对光伏新风预热系统的性能影响较大。在所研究的城市中，拉萨应用该系统的节能潜力最大，其次是沈阳和北京。由于环境温度高，太阳辐射差，长沙的月平均总能效在四个城市中最低。研究结果可为光伏新风预热系统在我国不同气候地区的应用提供理论指导。
The fresh air system in buildings consumes a large amount of energy. To preheat fresh air by using solar energy can effectively reduce the energy consumption of buildings. This paper combines photovoltaic thermal system with air handling unit (AHU) fresh air system to supply buildings with fresh air, and the combined system utilizes photovoltaic (PV) cells to generate electricity while preheating the fresh air at the same time. Based on the control-volume method and zonal approach, a dynamic model suitable for simulating the PV fresh air preheating system in real operating conditions was developed in this paper. A PV fresh air preheating system test platform was set up and tested in Changsha. The model was validated by the data collected under real conditions and the simulated results show a good agreement with the experimental data. The performance of the PV fresh air preheating system and its energy saving potential in four typical cities in different climate regions, Changsha, Beijing, Shenyang and Lhasa respectively, were analyzed. Results show that the performance of the PV fresh air preheating system is mainly affected by the solar radiation. The application of the system in Lhasa can reach the highest energy saving potential among the researched cities, followed by Shenyang and Beijing. Due to the high ambient temperature and poor solar radiation, the monthly average total energy efficiency of Changsha is the lowest among the four cities. The results can provide a theoretical guidance for the application of the PV fresh air preheating system in different climate regions of China.
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