科技创新导报
科技創新導報
과기창신도보
SCIENCE AND TECHNOLOGY CONSULTING HERALD
2014年
20期
251-254
,共4页
有机朗肯循环%变工况特性%余热发电%热力系统
有機朗肯循環%變工況特性%餘熱髮電%熱力繫統
유궤랑긍순배%변공황특성%여열발전%열력계통
Organic Rankine's cycle%Variable condition features%Waste heat power generation%Thermal system
有机朗肯循环系统发电系统内部参数与外界环境紧密相关，热源参数的变化、冷却水温度的变化都会使得系统内部各个点参数改变，从而导致系统长期运行在非额定工况热效率低。该文以循环工质为R245fa的有机朗肯循环系统作为研究对象，通过建立蒸发器和冷凝器换热模型，得出有机朗肯循环系统在不同热源温度、不同冷却水温度下的最佳蒸发温度、凝结温度变化情况，从而获得蒸发温度、凝结温度与热源温度、冷却水温度之间的函数关系。在实际有机朗肯循环系统余热发电工程中，存在着很多不稳定因素，因此对有机朗肯循环系统变工况特性分析是非常有必要的，对于提高系统整体性能具有指导性意义。
有機朗肯循環繫統髮電繫統內部參數與外界環境緊密相關，熱源參數的變化、冷卻水溫度的變化都會使得繫統內部各箇點參數改變，從而導緻繫統長期運行在非額定工況熱效率低。該文以循環工質為R245fa的有機朗肯循環繫統作為研究對象，通過建立蒸髮器和冷凝器換熱模型，得齣有機朗肯循環繫統在不同熱源溫度、不同冷卻水溫度下的最佳蒸髮溫度、凝結溫度變化情況，從而穫得蒸髮溫度、凝結溫度與熱源溫度、冷卻水溫度之間的函數關繫。在實際有機朗肯循環繫統餘熱髮電工程中，存在著很多不穩定因素，因此對有機朗肯循環繫統變工況特性分析是非常有必要的，對于提高繫統整體性能具有指導性意義。
유궤랑긍순배계통발전계통내부삼수여외계배경긴밀상관，열원삼수적변화、냉각수온도적변화도회사득계통내부각개점삼수개변，종이도치계통장기운행재비액정공황열효솔저。해문이순배공질위R245fa적유궤랑긍순배계통작위연구대상，통과건립증발기화냉응기환열모형，득출유궤랑긍순배계통재불동열원온도、불동냉각수온도하적최가증발온도、응결온도변화정황，종이획득증발온도、응결온도여열원온도、냉각수온도지간적함수관계。재실제유궤랑긍순배계통여열발전공정중，존재착흔다불은정인소，인차대유궤랑긍순배계통변공황특성분석시비상유필요적，대우제고계통정체성능구유지도성의의。
Organic Rankine's cycle power generation system internal parameters closely related to the external environment, the change of heat source parameters, cooling water temperature fluctuations can cause various points within the system parameter change, resulting in power system operation for a long time in the rating system thermal efficiency is low. Based on cyclic working substance of R245fa organic Rankine's cycle as the research object, through the establishment of evaporator and condenser heat transfer model, it is concluded that organic Rankine's circulation in different heat source temperature, evaporation temperature, condensation temperature of cooling water temperature changes, thereby gaining evaporation temperature, condensation temperature and the function relation between the heat source temperature, cooling water temperature. In actual organic Rankine's circulation waste heat power generation project, there are many unstable factors, so the analysis of the organic Rankine's circulation the variable working condition characteristics is necessary, to improve overall system performance has guiding significance.
