CAJ | 학술논문

搭建了以自行研发的向心透平为膨胀机的ORC低温余热发电系统实验平台，研究了R123质量流量对循环系统的性能影响。结果表明：液压隔膜泵的温升和熵增均较小，所消耗的功率随流量的增加而增加。工质在蒸发器内的压降明显大于冷凝器内的压降，均随流量的增加而增加；向心透平的等熵效率随质量流量的增加先增加后减小，存在最佳流量0.215 kg·s?1使透平等熵效率达到最大值0.775；系统输出的电功率随流量的增加而增加，流量为0.283 kg·s?1时输出系统最大功率为2.009 kW；蒸发器的?损率占系统总?损率的比重最大，冷凝器次之，向心透平第三，在本实验最佳质量流量下，三者的?损率分别为62%、32%、6%。
탑건료이자행연발적향심투평위팽창궤적ORC저온여열발전계통실험평태，연구료R123질량류량대순배계통적성능영향。결과표명：액압격막빙적온승화적증균교소，소소모적공솔수류량적증가이증가。공질재증발기내적압강명현대우냉응기내적압강，균수류량적증가이증가；향심투평적등적효솔수질량류량적증가선증가후감소，존재최가류량0.215 kg·s?1사투평등적효솔체도최대치0.775；계통수출적전공솔수류량적증가이증가，류량위0.283 kg·s?1시수출계통최대공솔위2.009 kW；증발기적?손솔점계통총?손솔적비중최대，냉응기차지，향심투평제삼，재본실험최가질량류량하，삼자적?손솔분별위62%、32%、6%。
An experimental prototype of organic Rankine cycle (ORC) was built for low-temperature waste heat power generation. With R123 as working fluid, heat transfer oil as the waste heat source, and radial inflow turbine as expander, a series of tests were carried out by adjusting the R123 mass flow rate to evaluate the performance of apparatus and system. The temperature rise and entropy increase of hydraulic diaphragm pump were lower, and consumed power increased with the mass flow rate. The pressure drop in the evaporator was greater than that in the condenser, and both increased with the mass flow rate of R123. The isentropic efficiency of the radial inflow turbine increased first and then decreased with the increase of R123 flow rate, with the maximum value of 0.775 kg·s?1 and the optimum value of 0.215 kg·s?1. The system output power increased monotonously to 2.009 kW as the flow rate of R123 increased to 0.283 kg·s?1. Exergy destruction rate of evaporator was the largest parts in total exergy destruction rate, followed by condenser and radial inflow turbine, about 62%, 32% and 6%, respectively, under the optimum condition.