Analysis On Full-cycle Energy Consumption And Energy Saving Characteristics Of Fu Brick Tea Fermentation And Drying Process

In recent years,environmental and energy issues have become increasingly prominent,and energy conservation and emission reduction have become imperative.Studying the fermentation and drying process of Fuzhuan tea has important guiding significance for improving the system operation mode and energy efficiency.At present,the fuzhuan tea fermentation and drying system adopts traditional coal-fired,gas-fired boiler and internal circulating air treatment methods,resulting in unreasonable energy distribution and waste.Studying the different combinations of heat sources and air treatment methods of the Fuzhuan tea fermentation and drying process system is conducive to improving the diversity and energy-saving characteristics of the Fuzhuan tea fermentation and drying process system,and has certain guiding significance for the practical engineering application of the system energy saving.This article takes the annual operating conditions of JingWei fu brick tea standardized drying room in Xianyang,Shaanxi as an example,uses TRNSYS transient simulation software to study the load characteristics of the drying room under the annual operating state,and based on the traditional air treatment method,studies the annual drying room under different heat sources.The internal temperature and humidity stability,system energy consumption,economy and environmental protection,and the accuracy of the model is verified through experiments.In order to improve the energy saving efficiency of the system,the feasibility of two different air treatmentmethods was explored,and the fresh air ratio of the energy-saving air treatment method was optimized,and then the five combinations of traditional and improved air treatment methods with air source heat pumps and gas boilers were investigated.The fermentation and drying systems of Fuzhuan brick tea were compared.The research content and main conclusions are as follows:(1)Aiming at the Fuzhuan tea fermentation and drying system,establish a mathematical model and TRNSYS simulation model to study the load characteristics of the drying room under the year-round operating state.(2)Research based on the temperature and humidity stability and energy consumption of various typical working conditions of the drying room under different heat sources of traditional air treatment methods throughout the year.Through comprehensive analysis of the system performance of the drying room temperature and humidity stability,energy saving,economy and environmental protection,this paper studies in the energy consumption and annual operating cost of the air source heat pump system are 74.05% and 84.57% of the boiler system.(3)The analysis found that there is energy waste in the traditional air treatment method.By improving the air treatment method,it is concluded that the sensible heat recovery primary return mode can reduce the energy consumption of the equipment.The first 72 h after the start of the winter fermentation period is 0.1,the 0.025 after 72 h,and the drying period is 0.1;the first 72 h after the start of the fermentation period in summer is 0.2,0.1 after 72 h,and the drying period is 0.2.(4)The combination of the air source heat pump and gas boiler as the heat source and the internal circulation and sensible heat recovery primary return air treatment method for the five feasible schemes through energy utilization,economic operation,and maintaining the annual temperature and humidity of the drying room fluctuation stability,pollutant emissions,etc.,make an overall evaluation of each program.The study found that scheme three(air source heat pump system based on sensible heat recovery once return air-internal circulation in winter)is better than other schemes in various evaluation indicators to different degrees,and the energy saving effect of the worst scheme can reach 42.48%.