Absorption Heat Transformer Simulation And Optimization

The first successful industrial application of Absorption Heat Transformer (AHT) has been put into practice in YanShan Petrochemical Corporation in China. On the background of this engineering, the thesis sets up the methods of absorber's enhanced heat and mass transfer, process simulation and Finite Time Thermodynamics analysis. The main research work is followed as:1. In the thesis, plain tube and DAC tube are studied through comparison and analysis of their experimental data. The results of comparison and analysis show that the DAC tube surpasses the plain tube on the aspects of not only heat transfer but also mass transfer. These data will help us to set up the reliable theories provided for the process simulation calculation of absorber in the whole software system.2. The principle and behavior feature of AHT was analyzed on system level. The system is described mathematically on the basis of mass balance, energy balance, and phase equilibrium. The model of process simulation of the AHT system is set up. The solution system of mathematical model of absorption cycles was put forward. On the base, integrated development environment of VB is used to develop software of simulation and optimization of AHT cycle system. After the software ASS is developed, it is applied to an industrial instance, including process simulation, thermal analysis and specific heating load (SHL) optimization. Furthermore, a successful test is conducted to check the simulation function.3.The methods of analysis and evaluation of thermodynamics of LiBr-H2O absorption cycles are set up. Firstly, Based on the utilization of The First and Second Law of thermodynamics, the ideal combined Camot Cycle model is set up. Secondly, Aimed at the insufficient of the classical thermodynamics analysis method, the popular method-- Finite Time Thermodynamics analysis is applied to set up the model of endo-reversible combined Carnot cycle. Finally, the optimization relationships between the specific heating load (SHL) and operating parameters and between SHL and COP are conducted according to the characteristics of the function and investment of AHT.