Simulation And Optimization Of Gas Fractionation Device Lithium Bromide Absorption Heat Pump System

Gas fractionation is one of the most widely used processes in oil refining industry which will consume large amount of energy. Oil refining enterprise has a lot of waste heat resources, if direct discharge, not only case a waste of quantity energy, but also the cost of the enterprise’s investment will be increased. Based on this context, this article makes an application of the moderate temperature hot water which used as the driving heated heat producer and then, proposed lithium bromide absorption heat pump used in gas fractionation installations. Not only the waste heat resources will be fully used and the structure of energy will be optimized, but also an important practical significance will be made to the epochal theme of energy conservation and environmental protection.(1) Based on the analysis of principle and the characteristics of gas fractionation device and lithium bromide absorption heat pump system, this article makes a research thermodynamic property of this system and then established the mathematic model of gas fractionation lithium bromide absorption heat pump device system. The computer language of C is used to compile the computer programs of this system. The whole process is realized on the computer simulation.(2) From thermodynamics direction, structure design direction and economics direction three different angles to optimize the operation condition of the system and then analysis of the various change of thermodynamic parameters. Eventually, this article make up with an important conclusion that the parameter of ACOP can be truly reflect the general properties of the system.(3) In order to validate feasibility of this system in the actual production process, this article makes a economic evaluation from many aspects, at the same time, makes a contradiction between conventional gas fractionation process and the process of gas fractionation used compression heat pump system. The results show that the capital static payback period of gas fractionation device lithium bromide absorption heat pump system is0.69years and dynamic payback period is0.69years too. The economic benefit of one-time investment can obtain61108.81million yuan which is about1.31times of the conventional system process and1.52times of the compression heat pump system process. Critical performance coefficient is1.679, which is less than the performance coefficient of actual operation. From this comparison, a conclusion can be made that gas fractionation device lithium bromide absorption heat pump system not only have a remarkable economic advantage, but also it is feasible in the economy and it is worthy to be popularized and used in actual production process.