寒冷地区主动式相变地板辐射供暖系统在供冷季的应用分析
Application analysis of active phase change material radiant floor heating system in cold zone during cooling season
摘要：
探讨了寒冷地区水平地埋管换热器耦合主动式相变地板辐射供暖系统在供冷季的应用,旨在评估该系统在满足冬季供暖前提下进行夏季供冷的可行性。通过在TRNSYS 18软件中构建相变地板仿真模型并制定合理的控制策略,解决了冷凝风险和湿度控制问题。研究结果表明,该系统在供冷季展现出优异的性能,相较于常规风机盘管结合自然通风系统具有更高的热舒适性、能源利用效率和经济性。系统运行期间,室内有人时间段的PMV值稳定在-0.2～0.5,总运行能耗为448.6 kW·h,较常规系统降低了83.1%,运行成本仅为常规系统的17%。本研究为寒冷地区居住建筑夏季供冷提供了可行的技术路径,同时为低碳建筑能源系统的设计和运行优化提供了创新性解决方案。
Abstract：
This paper investigates the application of horizontal ground heat exchanger coupled with active phase change material (PCM) radiant floor heating system in cold zone during the cooling season. The objective is to assess the feasibility of this system for summer cooling while satisfying the winter heating requirement. A PCM floor simulation model is developed in TRNSYS 18, and appropriate control strategies are implemented to address condensation risks and humidity control. The results indicate that the system demonstrates superior performance during the cooling season. Compared with a conventional fan-coil unit combined with natural ventilation, the proposed system offers enhanced thermal comfort, energy efficiency, and economy. During system operation, the PMV values for occupied periods remain stable between -0.2 and 0.5, with total operational energy consumption amounting to 448.6 kW·h, representing an 83.1% reduction compared with that of the conventional system. The operational cost is only 17% of that of the conventional system. This paper provides a viable technical approach for summer cooling in residential buildings in cold zone and offers an innovative solution for the design and operational optimization of low-carbon building energy systems.
Keywords:cold zone; phase change material; radiant floor cooling; residential building; horizontal ground heat exchanger; simulation