全文总字数：13062字
1. 研究目的与意义（文献综述）
as we all know, automobile air conditioning system isone of the most important devices to regulate the temperature and air insidethe automobile. the technical level of automobile air conditioning system willdirectly affect the temperature inside the automobile and the effect of airconditioning. in terms of technology development trend, with the change ofautomotive energy driving the development of new energy vehicles, thedevelopment of automotive air conditioning technology also focuses on the followingaspects: compressor electric drive, heat pump cycle auxiliary ptc forheating, high efficiency and lightweight heat exchanger, battery thermalmanagement, comfort and so on. [1] modern automobiles are generally equippedwith air conditioning systems, which are used to improve the comfort of driversand passengers. the comfort brought by automobile air conditioning is mainlyreflected in the temperature and humidity of the air in the car, the airfreshness and other parameters. the automobile can adjust the interiorenvironment to the most suitable state for human body. [2]
in this context, if the effective application level offuel cell vehicle air conditioning system is improved, it will become one ofthe key research projects. in fact, there are obvious differences betweentraditional fuel vehicle ground air conditioning system and new energy vehicleair conditioning system. relevant personnel should strengthen the structuraldesign of air conditioning system, so as to ensure the comfort of new energy vehicleair conditioning. on this basis, we will promote the healthy development of newenergy automobile industry in china.
the traditional air conditioning (ac) system consistsof a compressor driven by an engine driven by an electric clutch. air conditioningadds extra load to the engine of a car by increasing fuel consumption, whichleads to greater emissions. [3] the technology of new energy automobile airconditioning system in our country is developed from the traditional fuelautomobile air conditioning system, which means that the operation structure ofnew energy automobile air conditioning system in our country is similar to thatof traditional fuel automobile air conditioning system to a certain extent. theworking principle of new energy automobile air conditioning system is the sameas that of traditional fuel system air conditioning system. the electriccompressor of new energy automobile air conditioning system is driven by highvoltage electricity. the electric air conditioning compressor compresses thelow pressure and low temperature steam from evaporator, pressurizes it tocondenser, and makes refrigerant circulate around the system. [4] according tothe actual situation of new energy vehicles, the air-conditioning system of newenergy vehicles is mainly divided into waste heat utilization refrigerationair-conditioning system and heat pump air-conditioning system directlyutilizing electric energy. heat pump system is a reasonable and feasiblechoice, if it can solve some key problems. mobile climate control system basedon magnetocaloric effect and thermoelectric effect is a complementary methodfor future application. [5] because the automobile air conditioner firstadjusts the air temperature inside the carriage, it reduces the air temperatureby refrigeration. at present, thermoelectric refrigeration, electric compressorrefrigeration and waste heat refrigeration are the main refrigerationregulation modes for electric vehicle system in china. [6] the use of theseair-conditioning systems will have a certain impact on the structure andfunction of new energy vehicles, so it is necessary to strengthen the analysisand understanding of automobile air-conditioning system technology.refrigeration system and heating system are two major energy-consuming parts ofair-conditioning system. the main energy consumption of refrigeration system isconcentrated on compressor. it generally needs to consume high-grade energysuch as mechanical energy or electric energy. the energy consumption of heatingsystem is larger, but it can use low-grade energy such as waste heat. [7]
2. 研究的基本内容与方案
fuel cell vehicles are the trend of thedevelopment of the whole automotive industry at this stage. the vigorousdevelopment of new energy automotive air conditioning system will play animportant role in promoting the development and promotion of new energyautomobiles. a fuel cell bus air conditioning system is designed for the newenergy vehicle air conditioning system, which uses power battery as powersupply and consumes large energy in winter heating system. the main contents ofthis paper are as follows:
1)reading relevant literature, collectingrelevant literature on fuel cell bus air-conditioning system by scholars athome and abroad, and investigating and analyzing the current research situationof bus air-conditioning system, providing guidance for theoretical research,design and analysis of fuel cell vehicle air-conditioning system in thispaper.
3. 研究计划与安排
| Weekly (time) | Job content | Submit content (end of phase) |
| 1 (7 semesters, 20th week) | Determining the topic of graduation design, perfecting the task book ofgraduation design (related parameters), and collecting data in school | Graduation Design Task Book |
| 2 (the first week of the eighth semester) | Project Conception, Document Retrieval, Completion of Opening Report | Document Retrieval and Opening Report |
| 3-4 (2-3 weeks of 8 semesters) | Foreign Language Translation and Data Collection | Translation in foreign languages |
| 5-7 (4th-6th week of 8th semester) | Design calculation and sketch drawing | Draft of design calculation, sketch |
| 8-10 (7-9 weeks of 8 semesters) | Drawing drawings, writing papers (design and calculation instructions),pre-defense | Drawings, preliminary drafts of papers |
| 11-13 (8 semesters 10-12 weeks) | Drawing and design calculation instructions, data bags and qualificationexamination for defense | Formal drawings, papers |
| 14 (8th semester 13th week) | Students submit applications for defense and prepare for defense;teachers review drawings and papers (instructions) | Graduation Design Information Bag |
| 15-16 (8 semesters 14-15 weeks) | Participate in the defense and recommend provincial excellence | Graduation Design Achievements and Provincial Excellent Thesis |
4. 参考文献（12篇以上）
[1] huang guoqiang. preliminary study on research and developmentof efficient air conditioning for new energy vehicles [j]. refrigeration andair conditioning. 2016 (05)
[2] ma youliang. automotive electrical appliances and electroniccontrol system.[m]. third edition.beijing: machinery industry press.2015:02-427
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