优化设计并搭建了基于预热器的、可回收膨胀后高温乏汽的小型车载有机朗肯循环(ORC)余热发电系统。利用热力学第一定律和第二定律对小型车载ORC余热发电系统进行了热力学分析和能量计算。以R123为工质,热源温度为300℃,在工质流量、压...优化设计并搭建了基于预热器的、可回收膨胀后高温乏汽的小型车载有机朗肯循环(ORC)余热发电系统。利用热力学第一定律和第二定律对小型车载ORC余热发电系统进行了热力学分析和能量计算。以R123为工质,热源温度为300℃,在工质流量、压力等给定的工况下,计算系统在有无预热器的情况下各设备的热效率和系统总热效率。经计算,系统在有无预热器的情况下的总热效率分别为23.1%、10.8%,蒸发器的换热量分别为7.35 k J、4.67 k J。研究结果表明:相对于没有预热器的传统ORC系统,加了预热器的ORC系统的热效率和蒸发器的换热量都有较大的提升。展开更多
Over the last 45 years, the development of backbone telecommunications systems and construction of strategic oil and gas pipelines has spanned tens of thousands ofkilometres in harsh environments （arctic to tropical,...Over the last 45 years, the development of backbone telecommunications systems and construction of strategic oil and gas pipelines has spanned tens of thousands ofkilometres in harsh environments （arctic to tropical, unmanned or developing areas）. As the vast majority of these areas are without an electrical power lines infrastructure, the need arose for a highly reliable and maintenance-free power supply to allow the continuous operations of these projects. ORC （Organic Rankine Cycle） based on CCVT （closed cycle vapor turbogenerator） was specially developed for the special requirements. The paper presents the CCVT and its mode of operation, design criteria and case studies in projects implemented in the last 45 years.展开更多
文摘优化设计并搭建了基于预热器的、可回收膨胀后高温乏汽的小型车载有机朗肯循环(ORC)余热发电系统。利用热力学第一定律和第二定律对小型车载ORC余热发电系统进行了热力学分析和能量计算。以R123为工质,热源温度为300℃,在工质流量、压力等给定的工况下,计算系统在有无预热器的情况下各设备的热效率和系统总热效率。经计算,系统在有无预热器的情况下的总热效率分别为23.1%、10.8%,蒸发器的换热量分别为7.35 k J、4.67 k J。研究结果表明:相对于没有预热器的传统ORC系统,加了预热器的ORC系统的热效率和蒸发器的换热量都有较大的提升。
文摘Over the last 45 years, the development of backbone telecommunications systems and construction of strategic oil and gas pipelines has spanned tens of thousands ofkilometres in harsh environments （arctic to tropical, unmanned or developing areas）. As the vast majority of these areas are without an electrical power lines infrastructure, the need arose for a highly reliable and maintenance-free power supply to allow the continuous operations of these projects. ORC （Organic Rankine Cycle） based on CCVT （closed cycle vapor turbogenerator） was specially developed for the special requirements. The paper presents the CCVT and its mode of operation, design criteria and case studies in projects implemented in the last 45 years.
