非直膨式太阳能-水源热泵地板辐射采暖实验系统研究

Experiment System Analysis of Indirect Expansion Solar Assisted Water Source Heat Pump Radiant Floor Heating System

为解决太阳能供热系统间歇性和不稳定性的问题,对以水源热泵作为辅助热源,以热管式真空管太阳能集热系统为主要热源形式,以地板辐射采暖系统为末端装置的太阳能-水源复合热泵地板辐射供暖系统进行研究。分析该系统在不同工况运行原理的前提下,建立系统性能系数的数学模型。分析了集热器进出口温度、水箱平均温度、地板采暖系统进出口温度和热泵蒸发温度对系统供热性能的影响。提出此系统的运行策略和控制方案,为该系统的设计和运行控制提供了依据。

In order to solve the instability and intermittence of the solar heating system, a water source assisted solar heat pump for radiant floor heating （SWHP-RFH） system with heat pipe vacuum tube solar collector as heating source and radiant floor as terminal device is proposed. The mathematics model of coefficient of performance （COP） for SWHP-RFH is presented after analyzing the operation principle in different conditions. The influence of the inlet and outlet temperatures of collector and floor coil, the mean temperature of storage tank, evaporation temperature heat pump on the thermal performance of SWHP-RFH is investigated. Based on the theoretical analysis, the mathematic model and design parameter of each component are established, the operation strategy and control scheme are proposed under different weather conditions. The research provides a basis for the design and operation control of SWHP-RFH.