太阳能级间辅助两级压缩空气源热泵热水器的性能研究
Performance study of solar energy interstage auxiliary two-stage compressed air-source heat pump water heaters
摘要：
不同的太阳辐照度具有不同的能量品位,现有的太阳能和空气源热泵集成系统无法在不同太阳辐照度下均高效运行。本文提出了一种在较宽辐照度范围内均能高效运行的集成系统,即将太阳能集热器置于两级压缩热泵的中间喷射支路形成的太阳能级间辅助两级压缩空气源热泵系统,并用其制取生活热水。建立了系统仿真模型,基于MATLAB软件对不同辐照度、室外温度和压缩机容积比下的系统运行特性进行了数值模拟,分析了各参数对系统运行特性的影响,并得到了最优容积比。
Abstract：
Different solar irradiance has different energy grades. The existing integrated solar-energy and air-source heat pump systems can not operate efficiently at different solar irradiance. In this paper, an integrated system that can operate efficiently in a wide irradiance range is proposed, that is, the solar collector is placed in the middle injection branch of the two-stage compressed heat pump to form a solar energy interstage auxiliary two-stage compressed air-source heat pump system, and it is used to produce domestic hot water. The system simulation model is established, the system operating characteristics under different irradiance, outdoor temperature and compressor volume ratio are numerically simulated based on MATLAB software, the influence of each parameter on the system operating characteristics is analysed, and the optimal volume ratio is obtained.
Keywords:solar energy; irradiance; air-source heat pump; integrated system; two-stage compression; operating characteristic; volume ratio