基于三阶分析模型的斯特林发动机系统模拟和优化  

SIMULATION AND OPTIMIZATION FOR A STIRLING ENGINE BASED ON THIRD-ORDER ANALYSIS MODEL

作　　者：黄怡青 倪明江[1] 甘智华[2] 肖刚[1] Huang Yiqing;Ni Mingjiang;Gan Zhihua;Xiao Gang(State Key Laboratory of Clean Energy Urilization,Zhejiang University,Hangzhou 310027,China;Instiute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学能源清洁利用国家重点实验室,杭州310027 [2]浙江大学制冷与低温研究所,杭州310027

出　　处：《太阳能学报》2020年第6期310-316,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51776186)。

摘　　要：建立了基于Sage的GPU-3斯特林发动机的三阶分析模型,分析了循环过程中的输出功、效率、p-V图、压降等。结果表明,Sage模型的准确度较高,模拟循环输出功和循环效率的误差分别为12.63%~24.26%和-1.10%~7.98%。回热器是压降、换热量和损最大的部件,压降约为加热器的3倍,冷却器的5倍;换热量约为加热器和冷却器的10倍,循环输出功的70倍;损占整机损的50%以上。分别对不同目数丝网的回热器的长度和直径进行优化,得到的最大循环输出功相比优化前提升了31.1%,且回热器的最大换热量提升了33.9%,最大压降下降了73.5%。在此基础上进一步优化加热器和冷却器,循环输出功最高可提升38.9%。A third-order model based on Sage is applied to analyze and optimize the GPU-3 Stirling engine,including the indicated power output,thermal efficiency,p-V diagram,pressure drop,amount of heat transfer and exergy loss.The prediction deviation of the model is in the range of 12.63%-24.26%for the indicated power output and in the range of-1.10%-7.98%for the thermal efficiency,respectively.The maximum exergy loss is caused by the regenerator,as well as pressure drop and the amount of heat transfer,among all heat exchanges.The pressure drop in regenerator is^3 and^5 times higher than those of the heater and cooler,respectively.The amount of heat transfer of regenerator is 10 times higher than those of the heater and cooler,respectively,and 70 times higher than the value of indicated power output.It should be noted that the exergy loss in the regenerator takes up over 50%of the total,which indicates that it is necessary to firstly optimize the regenerator.The design parameters of regenerator,including the length,diameter and woven wire screens,are optimized based on the model,aiming to obtain the maximum indicated power output.The results show that the power could be increased by 31.1%when the maximum amount of heat transfer of regenerator is improved by 33.9%and the maximum pressure drop is reduced by 73.5%.The power could be further increased up to 38.9%if the heater and cooler could be improved further.

关 键 词：斯特林发动机 仿真建模 优化 回热器 太阳能热发电 三阶分析 

分 类 号：TK123[动力工程及工程热物理—工程热物理]