Research On Dynamic System And Thermal Management Of The Deep Sea Space Station

With the shortage of land resources,the competition for marine resources has become increasingly fierce.In order to develop marine resources and explore marine life,countries around the world have proposed to develop new deep-sea equipment deep-sea space stations.Since the deep sea space station needs to engage in scientific research and resource exploitation in the deep sea for a long time,it requires strong endurance capability to support it.Therefore,from the improvement of the endurance capability of the deep sea space station,this paper mainly selects the power system of the deep sea space station and thermal management.The relevant research is the main content of the thesis.The main research results are as follows:(1)The composition of the deep sea space station and the requirements of the power system are analyzed and summarized;the working process and characteristics of the closed cycle diesel engine AIP system and nuclear power turbine system are introduced,and integrate the problems and influencing factors applied in the deep sea space station.Analysis:According to the characteristics of the deep sea space station and the comprehensive comparison of the closed cycle diesel engine AIP system and the nuclear power turbine washing wheel,a new nuclear power Stirling engine system is proposed to provide reference for the future deep sea space station power system.(2)The internal cabin environment of the deep sea space station is briefly analyzed;refer to the idea of ? ? manned spacecraft thermal management,and the concept of thermal management of the deep sea space station is proposed;at the same time,the energy load of the deep sea space station is analyzed,and generate heat through the heat dissipation load and equipment in the station.The analysis shows that the heat generated by the equipment in the deep sea space station is much larger than the heat dissipation,and the heat management system is needed for reasonable heat dissipation.At the same time,the power load and energy flow chart of the deep-sea space station are presented to further clarify the main tasks of the management system;the energy-saving principle of the thermal management of the deep-sea space station is analyzed;finally,the implementation approaches of the thermal management of the deep-sea space station are proposed from three aspects of equipment level,system level and overall level.(3)The cooling method of the deep sea space station is analyzed and selected,and determine that the air conditioning cooling is directly used for the personnel cabin,and the equipment cabin with large heat load is cooled by the system using the extra-string sea water as the cold source,and then cooled by the air conditioner;Through the comprehensive comparison of the heat exchange efficiency of the DC cooling system,the circulating cooling water system and the heat pipe cooling system,the application and optimization methods of the heat pipe technology in the cooling system of the deep sea space station are mainly studied.The results show that the DC seawater cooling system has the highest efficiency under the same heat exchanger specification,the circulating water cooling system is the second,and the heat pipe cooling system is the lowest,but the performance of the heat pipe cooling system can be effectively improved by increasing the number of heat pipe stages.Close to the circulating water cooling system,the NTU needs to be considered in the application of the heat pipe cooling system on the deep sea space station.When the NTU is large,a multi-stage heat pipe cooling system is required.When the NTU is less than 1,a single-stage heat pipe cooling system is adopted;The power generation and desalination systems used in the auxiliary heat pipe cooling system can use the peripheral conditions to create more energy,while at the same time avoiding thermal pollution to the deep sea to a certain extent.