Combined Ejector-absorption Refrigeration Cycle System Of Condensing Pressure Boosted

Lithium bromide absorption heat pump is the circulatory system which can use the industrial waste heat as a driving source for cooling or heating, This system is widely used in waste heat recovery, energy cascade utilization occasions. Since the absorption heat pump is driven by direct heat, it increases the dependence of the external heat source and leads to its relatively limited scope of application. When the required outlet water temperature is relatively high, Absorption heat pump may not work. This paper developed a new system which combines the injector with absorption heat pump(Referred to as CB-CEA refrigeration cycle system). This system can maintain a constant pressure generator, and increase condensing pressure at the same time. It can expand the applications of lithium bromide absorption heat pump.This paper describes the working principle of CB-CEA refrigeration cycle system. For the ejector and the CB-CEA refrigeration cycle system, we research from the Modeling, optimization design and operating characteristics. Specific work as follows:1. Modeling the ejector and research the operating characteristics: According to the existing achievements, select the appropriate model and method, solve the injector design and simulation problems. Finally, research injector operating characteristics in changed conditions.2. Modeling the CB-CEA refrigeration cycle system: Combine the model of injector and absorption heat pump and obtain a composite model of CB-CEA refrigeration cycle system. Proposed the indicators to reflect the performance of the system.3. Optimum Design of CB-CEA refrigeration cycle system: Obtain the judged basis which can indicates work properly. Develop a new engineering methods and processes for CB-CEA heat pump. Consider the economic performance index as the objective function, and GA is used to optimize the system.4. Research the operating characteristics of CB-CEA refrigeration cycle system: Modeling the CB-CEA refrigeration cycle system for simulation. Quasi-Newton method is used for iterative solver. Discuss the influence of heat source and non-condensable gases on performance.5. Develop calculation program: Write object-oriented modular computing programs based on Matlab. The program include physical computing module, injector design and simulation module, unit Optimize design module, unit operation simulation module, and output format user interface, graphics, or text results.The results would provide a theoretical basis for the CB-CEA refrigeration cycle system design, and provide a reference for the operation of the unit commissioning. At the same time the developed computer program will facilitate the provision of practical engineering.