变转速光伏直驱制冷系统的理论与实验研究  

NUMERICAL AND EXPERIMENTAL STUDY ON VARIABLE SPEED PHOTOVOLTAIC DIRECT-DRIVEN REFRIGERATION SYSTEM

作　　者：苏鹏 季杰[1] 蔡靖雍[1] 高毓壑 韩可东 Su Peng;Ji Jie;Cai jingyong;Gao Yuhe;Han Kedong(Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230027,China)

机构地区：[1]中国科学技术大学热科学和能源工程系

出　　处：《太阳能学报》2021年第6期115-123,共9页Acta Energiae Solaris Sinica

基　　金：新一代高效低成本太阳能光伏光热与建筑一体化系统研发(2016YFE0124800);东莞市引进创新创业科研团队项目(2014607101008)。

摘　　要：设计一套压缩机转速可改变的光伏直驱制冷系统。在该系统中,光伏组件将产生的直流电不经过逆变器,直接输入到直流压缩机,且系统组成中不包含蓄电池等储能装置,压缩机转速随着辐照强度变化而变化。建立该系统的动态理论模型,并通过实验验证该模型的正确性。基于验证后的理论模型,分别研究压缩机转速控制策略及压缩机转速控制模块的信号放大系数对系统性能的影响。相比于压缩机定转速模式,在压缩机转速改变模式下,制冷系统的制冷量提升了32.57%,平均光伏利用效率提升了51.75%。当信号放大系数增大为原放大系数的1.2倍和1.4倍时,系统性能显著提高,因此可通过适当调整转速控制模块的信号放大系数来改变制冷系统性能,达到优化的目的。A novel variable speed photovoltaic DC refrigeration(VSPVDR)system is proposed in this paper.In the VSPVDR system,the direct current generated by the PV panel is directly input to the DC compressor without the inverter,and the system composition does not include batteries and other energy storage devices,and the compressor speed changes with the radiation intensity.In the paper,a dynamic model is presented to simulate the behavior of the VSPVDR system,and several prototype experiments are conducted to validate the model.On this basis,the impacts of the compressor speed control strategy and signal amplification factor of the speed control module have been studied.Compared with the fixed speed mode,the cooling capacity of the variable speed mode increases by 32.57%and the average PV utilization efficiency increases by 51.75%.When the signal amplification factor increases by 1.2 times and1.4 times,the performance of the system increases significantly,so the performance of the refrigeration system can be changed by appropriately adjusting the signal amplification factor of the speed control module to achieve the purpose of optimization.

关 键 词：光伏制冷 变转速 直流压缩机 空气源 

分 类 号：TK519[动力工程及工程热物理—热能工程]