In this paper, a simulation method based on material-drying oven integration was developed for the hot air-drying process of Lentinus edodes. First of all, the drying characteristics were investigated under different drying conditions, and drying kinetic models were obtained at different air temperatures, relative humidities (RHs) and air flow rates. Then, drying kinetic derivative models to predict the drying process under different working conditions were obtained and used to calculate water evaporation rate, and the rate of water evaporation was introduced into the heat and mass transfer equations to develop mathematical models based on material-drying oven integration. Using the models, the pattern of temporal changes in air temperature, RH and air flow rate at any position inside the oven and moisture ratio (MR) was obtained. Finally, the drying characteristics were worked out using the integrated models. Overall, significant non-uniformity occurred during the drying process. As drying proceeded, non-uniformity decreased. In the direction of air flow, non-uniformity was more significant at positions closer to the oven’s top and bottom. In the transverse direction, non-uniformity was more significant at positions closer to the middle. In summary, the simulation method for hot air-drying of Lentinus edodes is meaningful for guiding the structural design of the drying chamber, the optimization of the drying process and the improvement of the product quality.

The effective plugging of artificial fractures is key to the success of temporary plugging and diverting fracturing technology, which is one of the most promising ways to improve the heat recovery efficiency of hot dry rock. At present, how temporary plugging agents plug artificial fractures under high temperature remains unclear. In this paper, by establishing an improved experimental system for the evaluation of temporary plugging performance at high temperature, we clarified the effects of high temperature, injection rate, and fracture width on the pressure response and plugging efficiency of the fracture. The results revealed that the temporary plugging process of artificial fractures in hot dry rock can be divided into four main stages: the initial stage of temporary plugging, the bridging stage of the particles, the plugging formation stage, and the high-pressure dense plugging stage. As the temperature increases, the distribution distance of the temporary plugging agent, the number of pressure fluctuations, and the time required for crack plugging increases. Particularly, when the temperature increases by 100 ℃, the complete plugging time increases by 90.7%.