This paper presents the applications of vibration monitoring and a diagnosis technique on the predictive maintenance of pipe line pumps on offshore platforms. The monitored ten pumps are distributed on the past three...This paper presents the applications of vibration monitoring and a diagnosis technique on the predictive maintenance of pipe line pumps on offshore platforms. The monitored ten pumps are distributed on the past three petroleum platforms of the CACT (C: China offshove Southern; A: Agip; C: Chivron; T: Texaco) Operation Group in the Huizhou oil field. By the periodical vibration survey in recent three years, the typical faults and the vibration features of these pumps have been summarized, which set up the basis for efficient predictive maintenance of this key equipment offshore.展开更多
This paper uses FLUENT software building the three-dimensional unsteady state model of ground source heat pump single U and double U underground pipe to study on heat exchange of underground pipe system in the conditi...This paper uses FLUENT software building the three-dimensional unsteady state model of ground source heat pump single U and double U underground pipe to study on heat exchange of underground pipe system in the condition of unsteady state long-term continuous running, analyzes the change of soil temperature filed around underground pipe and performance of underground pipe heat exchange between single U and double U pipe system. The results show that double U pipe system is better than single U system, which can improve unit depth heat exchange efficiency, reduce the number of wells and reduce the initial investment.展开更多
防护工程内信息化设备散热量大,余热会导致工程内部温度升高、设备失效甚至瘫痪。结合垂直埋管运行高效和水平埋管成本低廉的优势,采用复合埋管式地源热泵系统处理工程内余热以及口部潮湿问题,计算工程内通信机房和办公大厅的全年逐时负...防护工程内信息化设备散热量大,余热会导致工程内部温度升高、设备失效甚至瘫痪。结合垂直埋管运行高效和水平埋管成本低廉的优势,采用复合埋管式地源热泵系统处理工程内余热以及口部潮湿问题,计算工程内通信机房和办公大厅的全年逐时负荷;利用TRNSYS仿真软件构建复合埋管式与垂直埋管式热泵系统模型,比较复合埋管式热泵系统与传统的垂直埋管式热泵系统的热性能、经济效益及防潮效果。结果表明,在工程口部设定水平地埋管可有效降低口部空气相对湿度,起到防潮防湿的作用;在复合埋管式热泵系统总性能系数(coefficient of performance,COP)更高的前提下,复合埋管式热泵系统的总成本较垂直埋管式热泵系统降低了21.8%。展开更多
文摘This paper presents the applications of vibration monitoring and a diagnosis technique on the predictive maintenance of pipe line pumps on offshore platforms. The monitored ten pumps are distributed on the past three petroleum platforms of the CACT (C: China offshove Southern; A: Agip; C: Chivron; T: Texaco) Operation Group in the Huizhou oil field. By the periodical vibration survey in recent three years, the typical faults and the vibration features of these pumps have been summarized, which set up the basis for efficient predictive maintenance of this key equipment offshore.
文摘This paper uses FLUENT software building the three-dimensional unsteady state model of ground source heat pump single U and double U underground pipe to study on heat exchange of underground pipe system in the condition of unsteady state long-term continuous running, analyzes the change of soil temperature filed around underground pipe and performance of underground pipe heat exchange between single U and double U pipe system. The results show that double U pipe system is better than single U system, which can improve unit depth heat exchange efficiency, reduce the number of wells and reduce the initial investment.
文摘防护工程内信息化设备散热量大,余热会导致工程内部温度升高、设备失效甚至瘫痪。结合垂直埋管运行高效和水平埋管成本低廉的优势,采用复合埋管式地源热泵系统处理工程内余热以及口部潮湿问题,计算工程内通信机房和办公大厅的全年逐时负荷;利用TRNSYS仿真软件构建复合埋管式与垂直埋管式热泵系统模型,比较复合埋管式热泵系统与传统的垂直埋管式热泵系统的热性能、经济效益及防潮效果。结果表明,在工程口部设定水平地埋管可有效降低口部空气相对湿度,起到防潮防湿的作用;在复合埋管式热泵系统总性能系数(coefficient of performance,COP)更高的前提下,复合埋管式热泵系统的总成本较垂直埋管式热泵系统降低了21.8%。
