DEStech Transactions on Environment, Energy and Earth Science 

About: DEStech Transactions on Environment, Energy and Earth Science is an academic journal. The journal publishes majorly in the area(s): Electric vehicle & Electric power system. It has an ISSN identifier of 2475-8833. It is also open access. Over the lifetime, 1795 publications have been published receiving 1593 citations.

Energy Management Strategy for a Series Hybrid Electric Vehicle Using Improved Deep Q-network Learning Algorithm with Prioritized Replay

Abstract: On the basis of previous deep Q-network (DQN) based energy management strategy (EMS), two aspects of efforts are explored to improve it for more efficient and stable training and performances in this paper. First, the architecture of original DQN is changed in order to learn separately from the value of current driving/vehicle states and advantages of EMSs under current states; a duplicated network is adopted for Q-value calculation. Second, prioritized replay is introduced for more efficient data utilization during training of DQN based EMS. Simulation results show that the convergence of improved DQN based EMS is faster and higher reward can be achieved compared with original DQN based EMS. Simulation on China typical urban driving cycle for the series hybrid electric vehicle indicates that the fuel economy performance of improved DQN (6.07L/100km) is 8.4% higher than DP based EMS, exceeding original DQN based EMS (6.24L/100km) by about 3%.

Commercial Demonstration of Solid Fuel Production from Municipal Solid Waste Employing the Hydrothermal Treatment

Abstract: This study reports the commercial demonstration of solid fuel production from non-segregated municipal solid waste (MSW) employing the hydrothermal treatment. Non-segregated MSW are fed into the reactor, and then, 220 ℃ , 2.5MPa saturated steam is supplied into the reactor and the blades installed inside the reactor rotates to mix MSW and steam for about 30 minutes. Then the product is discharged after extracting steam. The product is powder-like substance and the moisture content is almost the same as the raw material, but is easily dried by natural drying. The inert material such as metal, glass and stones can be easily sieved out after drying. There is almost no bad smell in the solid products, and the products can be used as solid fuels which can be mixed with coal for power generation or cement production. Only 10-15% of the product is enough for steam production in a boiler. This study focuses on the product properties and mass & energy balances of the HTT commercial plant located in Indonesia with the treatment capacity of 25tons/12 hours.

Research Progress in the Processing and Exploitation of Hawthorn

Abstract: The planting area of Crataegus spp. is wide in China, and it has high edible and medicinal value. These fruit represent a highly renewable and cheap source of nutrients. The medicinal value, the processing technology of hawthorn, active substances extraction technology of hawthorn and the comprehensive utilization of hawthorn were summarized in this paper, and the prospect and direction of research on hawthorn processing was discussed. Moreover, the promising results of their nutritional value in health protection suggest the opportunity to take advantage of the large availability of this fruit to be used in functional foods and nutraceutical products.

Effect of Firing Temperature on Electrical and Structural Characteristics of Screen Printed In2O3 Thick Films

Abstract: In2O3 thick films were prepared on porous alumina (Al2O3) substrate by using standard screen printing technique and fired at different temperatures from 750oC to 950oC in air atmosphere. The DC resistance of film was measured by half bridge method in air atmosphere at different temperatures. The films were showing decrease in resistance with increase in temperature indicating semiconductor behavior. The resistivity (ρ), activation energy (∆E) and temperature coefficient of resistance (TCR) are evaluated at different firing temperatures. Samples were characterized by Xray diffraction (XRD) technique, scanning electron Microscopy (SEM)), Energy Dispersive Spectroscopy (EDX) and Atomic force microscopy (AFM) technique, for compositional, phase confirmation and surface growth and morphology study.