| In recent years,through optimization and adjustment,the livestock farm industry has gradually transformed from decentralized culture to intensive culture.Although it shows the advantages of high output and high efficiency,it also brings the problems of high energy consumption and high pollution.At present,the power supply system of the farm mainly has the problems of relying on the municipal power(mainly thermal power)and the immature power supply system of new energy,and the large-scale farm can produce a lot of fecal pollution every day.If not used,it will not only cause the waste of biogas,but also form serious pollution problems.There are abundant solar energy resources on the earth,and now there are more solar energy to be used.However,the common way of solar power generation is to convert the light energy into electric energy by receiving the light from the solar cell.When the solar energy is irradiated to the photovoltaic panel to generate electric energy,the heat will also be generated,resulting in the high temperature on the surface of the battery and the decrease of the photoelectric conversion efficiency.In order to solve the above problems,this paper takes the livestock house as an example to put forward the photovoltaic temperature difference biogas energy joint power generation mode and carry out research.At the same time of solar photovoltaic cell power generation,use the temperature difference battery to collect the waste heat energy generated on the surface of photovoltaic cell and convert it into electric energy,provide more energy output,and make complementary use of the biogas energy,so as to solve the problem of comprehensive high energy consumption and high pollution.The specific work is to design a biogas power generation and power supply circuit for the large amount of livestock manure produced in the livestock house every day;then,combined with the main structure of the breeding shed,a suitable PV-TE power generation system combined with photovoltaic and temperature difference is designed and integrated into BIPVT technology by PV-TE and building integration technology;the electricity generated by these three power generation methods is integrated and connected through rectification and inversion and other operations.In order to ensure the stability of power supply,the corresponding energy storage system is designed to achieve the goal of self-sufficiency of power generation.In order to facilitate the research,according to the structural design method,the combined power generation system is divided into photovoltaic temperature difference composite power generation system,biogas power generation system and(VRB)storage system and other subsystems,and their mathematical models are built,simulated and analyzed using MATLAB/Simulink.At the same time,in order to save the investment cost,this paper has completed the optimal capacity selection of different renewable energy to meet the daily energy demand by using genetic algorithm calculation and home simulation.In this paper,the photovoltaic temperature difference biogas energy combined power generation system is designed,and then the most economical installed capacity configuration of livestock house is obtained with thelowest total cost of the system in combination with the actual load data of a large-scale breeding farm in Jiangsu Province.The result of Homer simulation is that the photovoltaic capacity is 20 k W,the temperature difference battery is 5k W,the biogas generator power is 10 k W,which is close to the optimal configuration calculated by genetic algorithm,and the optimal configuration of the system is reasonable.The combined power generation system designed in this paper integrates energy construction and environmental construction,provides ideas for new energy power generation of large-scale farms,and conforms to the strategy of sustainable development. |
PDF Full Text Request