太阳能级间辅助两级压缩空气源热泵热水器的性能研究
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。
关键词：太阳能辐照度空气源热泵集成系统两级压缩运行特性容积比
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[3] 李郁武，王如竹，王泰华，等.直膨式太阳能热泵热水器热力性能分析及优化设计[J].太阳能学报，2007,28(5):464- 471.
[4] 武晓伟，李洁.严寒地区太阳能-空气源热泵供暖系统优化运行试验研究[J].工程热物理学报，2019,40(4):900- 906.
[5] 鄂闯，刘馨，梁传志，等.严寒地区太阳能-空气源热泵耦合供热系统控制策略优化研究[J].建筑技术，2023,54(2):187- 192.
[6] VEGA J,CUEVAS C.Simulation study of a combined solar and heat pump system for heating and domestic hot water in a medium rise residential building at Concepción in Chile[J].Applied thermal engineering,2018,141:565- 578.
[7] CHEN J H,YU J L.Theoretical analysis on a new direct expansion solar assisted ejector-compression heat pump cycle for water heater[J].Solar energy,2017,142:299- 307.
[8] LI F L,CHANG Z,LI X C,et al.Energy and exergy analyses of a solar-driven ejector-cascade heat pump cycle[J].Energy,2018,165:419- 431.
[9] YAN G,BAI T,YU J L.Energy and exergy efficiency analysis of solar driven ejector-compressor heat pump cycle[J].Solar energy,2016,125:243- 255.
[10] 马坤茹，李雪峰，李思琦，等.新型太阳能/空气能直膨式热泵与空气源热泵供热性能对比[J].化工学报，2020,71(增刊1):375- 381.
[11] CHEN J H,YU J L.Energy and exergy analysis of a new direct-expansion solar assisted vapor injection heat pump cycle with subcooler for water heater[J].Solar energy,2018,171:613- 620.
[12] CHATURVEDI S K,CHIANG Y F,ROBERTS J A S.Analysis of two-phase flow solar collectors with application to heat pumps[J].Journal of solar energy engineering-transactions of the ASME,1982,104(4):358- 365.
[13] QIU G D,WEI X H,XU Z F,et al.A novel integrated heating system of solar energy and air source heat pumps and its optimal working condition range in cold regions[J].Energy convers management,2018,174:922- 931.
Performance study of solar energy interstage auxiliary two-stage compressed air-source heat pump water heaters
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;
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