适应夏热冬冷地区建筑的太阳能相变蓄热墙体系统的数值模拟和实验研究

Tending to develop application of passive solar utilization in building in the hot summer and cold winter zone, a novel building integrated PCM wallboard is proposed, and it is named as building-integrated double-channel and middle-positioned-insulation solar PCM (Phase Change Material) wall. The novel system can work in one of its four different working modes: solar passive heating, heat preservation, passive cooling and heat insulation in compliance with the building demands, and can solve the often suffering problem of normal building-integrated solar thermal system that solar heat is harmful for building in summer. It is exactly suitable for applying in the hot summer and cold winter zone since its good seasonal flexibility and cost effective. A dynamic thermal model of the novel system is to be established by considering the flow and heat transfer process of phase change heat transfer, radiation, air circulation of flow, etc., and a combination of experimental and numerical approaches is to be used for performance analysis of the novel system. The experiment will be achieved based on a hot-box. The study will show the results of phase change heat transfer process, solar heat efficiency and effect on indoor thermal comfort and building heating/cooling loads respectively for the novel system's four working modes. Based on the results, a comprehensive study on its annual performance will be done. In addition, numerical simulation will be made to present design basis in the hot summer and cold winter zone. Overall speaking, the project is of important significance to both academic study and practical application.

以解决我国夏热冬冷地区太阳能在建筑中的应用问题为主要方向，项目提出研究一种新型太阳能相变蓄热墙体系统：双流道-中间隔热型太阳能相变蓄热墙体系统。该系统可以根据建筑需求灵活实现太阳能采暖、保温、隔热和自然冷却四种功能，可有效解决一般太阳能建筑技术常面临的在夏季太阳热能对建筑有害的问题，系统的季节适应性和经济性好，尤其适合应用于我国夏热冬冷地区。项目拟研究分析系统在各个工作模式下涉及到的相变传热、辐射、空气流动循环等流动传热过程，建立系统完整的非稳态模型，并采用数值模拟和可对比热箱实验测试相结合的方法，对系统各个模式下的相变传热问题、太阳光热效率问题和对建筑热环境及建筑冷/热负荷的影响问题等进行研究，并基于各个工作模式的研究结果，进一步研究系统的整体综合性能。根据研究结果及地区气候和建筑特点，项目还将理论模拟分析该新型系统在夏热冬冷地区推广应用的指导性设计依据。项目具学术意义和工程应用价值。

以解决我国夏热冬冷地区太阳能在建筑中的应用问题为主要方向，项目提出研究一种新型太阳能相变蓄热墙体系统：双流道-中间隔热型太阳能相变蓄热墙体系统。该系统可以根据建筑需求灵活实现太阳能采暖、保温、隔热和自然冷却四种功能，可有效解决一般太阳能建筑技术常面临的在夏季太阳热能对建筑有害的问题，系统的季节适应性和经济性好，尤其适合应用于我国夏热冬冷地区。项目研究分析系统在各个工作模式下涉及到的相变传热、辐射、空气流动循环等流动传热过程，建立系统完整的非稳态模型，并采用数值模拟和可对比热箱实验测试相结合的方法，对系统各个模式下的相变传热问题、太阳光热效率问题和对建筑热环境及建筑冷/热负荷的影响问题等进行研，并基于各个工作模式的研究结果，进一步研究系统的整体综合性能。项目也研究分析了该新型系统在夏热冬冷地区推广应用的优化设计问题。项目具学术意义和工程应用价值。