Optimization Of Performance Based On Heat Exchanger Area In Multi Type Haet Pump Units

As the international energy increasingly scarce, concerns about energy efficiency is alsogrowing. Air conditioning system as an important part of building energy consumption accounts forabout70%of the total building energy consumption. So how to effectively reduce energyconsumption of air conditioning energy consumption has become the building’s top priority. At present,the multi type heat pump units because of its installation convenience, flexibility, control ofindependence is widely used in office buildings, hotels and high-grade residential buildings, and inareas such as building renovation and expansion have played an important role.The first chapterintroduces the development history of split type heat pump units, the research background andresearch meaning. The IPLV is introduced as a split type heat pump unit efficiency evaluation criterionof evaluation mechanism.At this stage, the evaluation of the performance of air conditioning refrigeration equipmentcomprehensive evaluation indexes are Integrated part load value (IPLV) and the season energyefficiency ratio(SEER). IPLV as an important evaluation criterion, evaluation of energy consumptionof air conditioning system focuses more on the analysis of the operation energy consumption of heatpump units in different working conditions; SEER is due to its peculiar temperature-hours, socompared with IPLV is not unified evaluation parameters, but need according to the different areas,corresponding to different regional SEER. This article through the two evaluation standard of splittype heat pump units respectively two kinds of heat exchanger heat transfer area of optimizationcalculation and analysis. Concrete research content is as follows:The first chapter introduces the development history of multi type heat pump units, the researchbackground and meaning. At the same time introduces the evaluation index, evaluation of theperformance of air conditioning refrigeration equipment IPLV and SEER, and expounds thedevelopment history and research status of two kinds of indexes. The second chapter establish the R22vapour compression cycle model, the working mediumand accuracy is verified by experimental data. Compression in the process of the model consideringthe vapour compression cycle and the irreversible loss of heat transfer process, and introduced thesystem cycle of supercooling and suction superheat, through theoretical analysis and numericalsimulation method to study the operation parameters, such as outdoor air temperature, humidity, heatexchanger, heat transfer coefficient, heat transfer area of influence on the efficiency of the circulationsystem, it is concluded that based on the heat exchanger area of multigang heat pump unitperformance optimization theory basis.The fourth chapter used the cycle model of R22vaporcompression in the second chapter By reciting the seasons’ SEER, optimize the system heat transferarea of analysis, and the optimization model is established. Besides, eight typical cities and the generalanalysis of temperature-hours of optimizing interval and the parameters for target parameters isobtained, and the SEER and IPLV is discussed in the differences and similarities of evaluationparameters. The scope of application of the two kinds of evaluation parameters was summarized.The third chapter using the vapor compression cycle model of R22, introduced the integratedpart of the energy efficiency coefficient IPLV, export with the split type heat pump units the relationbetween the two kinds of heat exchanger area ratio, and analyzes the influence law, it is concluded thatthe optimization of heat transfer area ratio interval, and to further explore the evaporator, condenserheat transfer area of the influence law of IPLV value to the system respectively. In addition, theintroduction of weight coefficient, and optimize the system annual IPLV analysis.The fourth chapter using R22vapour compression cycle model to optimize the system heattransfer area of analysis, optimization model is established. And eight typical cities and the generalanalysis of temperature-hours of optimizing interval and the parameters for target parameters isobtained, and the SEER and IPLV is two discussed the differences and similarities of evaluationparameters, analyzes the scope of application of these two kinds of evaluation parameters.The fifth chapter summarized the full text of the main contents and made a conclusions,meanwhile, put forward the creative points in the paper.