以直膨式太阳能热泵系统的集热/蒸发器为研究对象,设计一种新型优化集热/蒸发器,通过实验对比测试其在换热能力、温度均匀性、流动压力损失方面与原型集热/蒸发器的差异。研究结果表明：在环境温度为4.7 ℃,平均辐照度为454.8 W/m2的工况条件下,采用新型优化集热/蒸发器的系统COP可达到4.3,得热因子为1.752,无量纲压强损失系数为0.05,均优于原型集热/蒸发器,为集热/蒸发器的设计优化理论提供了实验验证。
Abstract
Taking the collector evaporator of the direct expansion solar heat pump system as the research object, a new type of optimized collector/evaporator was designed, and the differences in heat transfer capacity, temperature uniformity, and flow pressure loss between the prototype component and the optimized one were tested through experimental comparison. The research results show that under the working conditions of an ambient temperature of 4.7 ℃ and an average radiation intensity of 454.8 W/m2, the COP of the system using the new optimized components can reach 4.3, the heat gain factor is 1.752, and the dimensionless pressure loss is 0.05, which are better than the prototype components. It provides experimental verification for the design optimization theory of the collector/evaporator.
关键词
太阳能集热器 /
热泵系统 /
蒸发器 /
性能系数 /
得热因子
Key words
solar collector /
heat pump system /
evaporator /
coefficient of performance /
heat gain factor
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] KABIR E, KUMAR P, KUMAR S, et al.Solar energy: potential and future prospects[J]. Renewable and sustainable energy reviews, 2018, 82: 894-900.
[2] OZGENER O, HEPBASLI A.A review on the energy and exergy analysis of solar assisted heat pump systems[J]. Renewable and sustainable energy reviews, 2007, 11(3): 482-496.
[3] BORODE A, AHMED N, OLUBAMBI P, et al.A review of solar collectors using carbon-based nanofluids[J]. Journal of cleaner production, 2019, 241: 118311.
[4] BHOWMIK H, AMIN R.Efficiency improvement of flat plate solar collector using reflector[J]. Energy reports, 2017, 3: 119-123.
[5] SUN X L, WU J Y, DAI Y J, et al.Experimental study on roll-bond collector/evaporator with optimized-channel used in direct expansion solar assisted heat pump water heating system[J]. Applied thermal engineering, 2014, 66(1-2): 571-579.
[6] 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.
LI Y W, WANG R Z, WANG T H, et al.Experimental performance analysis and optimization of a direct expansion solar assisted heat pump water heater[J]. Acta energiae solaris sinica, 2007, 28(5): 464-471.
[7] 李冠群, 孙晓琳, 陈金峰, 等. 基于光电/光热一体化的太阳能热泵性能分析[J]. 化工学报, 2016, 67(增刊2): 291-297.
LI G Q, SUN X L, CHEN J F, et al.Performances of PV/T solar-assisted heat pump system[J]. CIESC journal, 2016, 67(S2): 291-297.
[8] 李郁武, 王如竹, 王泰华, 等. 直膨式太阳能热泵热水器运行特性的实验研究[J].工程热物理学报, 2006 , 27(6): 923-925.
LI Y W, WANG R Z, WANG T H, et al.Experimental study on the operational characteristics of direct expansion solar assisted heat pump water heater[J]. Journal of engineering thermophysics, 2006, 27(6): 923-925.
[9] YAO J, CHEN E J, DAI Y J, et al.Theoretical analysis on efficiency factor of direct expansion PVT module for heat pump application[J]. Solar energy, 2020, 206: 677-694.
基金
山东省重大科技创新工程项目（2019JZZY020801）
PDF(2709 KB)
