Research On Micro Heating And Power Supply System For Rv Based On Thermoelectricity Technology

The rapid development of tourism industry has led to the rise of self-driving and camp tourism.As a mobile home,RV(recreational vehicle)has attracted more and more people’s attention.Although RV can meet people’s needs of food and clothing lives row outdoors,it also has some shortcomings.For example,it is impossible to supply heating and power for a long time when the vehicle is not started.The self-contained heating device is large in volume,noisy,and does not have the power supply capacity.In order to solve these problems,we developed a kind of energy supply device which can realize heating and electricity supply for RV.Its main research contents are as follows:Firstly,the conversion process of thermoelectric module is analyzed theoretically.Several thermoelectric effects involved are sorted out.The energy conversion process of thermoelectric module is analyzed.Based on the principle of energy conservation,the mathematical equation of energy conversion process of thermoelectric module is established.By temperature fitting the material properties of thermoelectric module,then the temperature distribution function of semiconductor in thermoelectric module is obtained.The results show that the obtained temperature distribution function has a good fit,and its accuracy is higher than that of the linear temperature distribution function and the second-ordertemperature distribution function.Then three kinds of micro-scale thermoelectric generators are designed and developed,and which performances are tested comprehensively.The results show that the maximum power output of the two-piece micro thermoelectric generator is 1.88 W when the combustion power is 108 W,and the corresponding energy conversion efficiency is 1.74%.Based on the research of two-piece micro thermoelectric generator,micro thermoelectric generator is designed and developed.When the combustion power is 956 W,25.7 W power output is obtained,and the corresponding thermoelectric conversion efficiency is 2.69%.In order to pursue greater output of electric energy,an eight-piece micro thermoelectric generator is designed and developed.However,the experimental results show that when the combustion efficiency is 1200 W,only 10.63 W of electric energy and0.89% of thermoelectric conversion efficiency are generated.Through the experiment,it is found that the temperature distribution of the original six-piece micro thermoelectric generator along the flue gas outlet direction is quite different,which restricts the generation performance of the thermoelectric generator.Therefore,the structure of the burner of the six-piece micro thermoelectric generator has been changed,and the effects of wall thickness,combustion power and equivalent ratio on the power generation performance have been studied.The maximum power of the improved thermoelectric generator is 30.7 W,and the conversion efficiencyof the whole system is 3.21%.Finally,based on the thermoelectric generator with 12 mm wall thickness,a cogeneration system is designed and developed,and the influence of pump voltage and fan voltage on the whole cogeneration system under the condition of self-supply is studied.The results show that the influence of fans and pumps on the whole cogeneration system is about10%.When the combustion power is 956 W,the fan voltage is 11 V and the pump voltage is 12 V,the maximum power output is 697.2 W,and the corresponding energy utilization ratio is 72.9%.