Highlights

• Current situation of China's distributed photovoltaic is investigated.
• Policy environment is presented and analyzed.
• Strengths, weaknesses, opportunities, and threats are illustrated and classified.
• How blockchain technology can promote the development of distributed photovoltaic is studied for the first time.
• The suggestion on promoting the development of blockchain is proposed.

Herein, we report the advances on graphene-based supercapacitor with a focus on graphene-based ternary composites. The ternary composites can be fabricated by using the combination of active materials, ie, graphene, conducting polymers, metal oxides, and other carbon-based materials. It critically reviews the supercapacitive performance of ternary composite containing graphene.

• Value chains where forest biomass is upgraded to intermediate products, before transportation for further upgrading at a synthetic natural gas plant, are compared with chains in which the forest biomass is transported directly to the synthetic natural gas plant.
• Drying forest residues using excess heat at pulp mills leads to somewhat increased transportation costs, whereas heat is “moved” from a location where it could be hard to find profitable ways to use it to where it could be used for district heating, resulting in similar performance for the compared chains.

This study investigates the fabrication of a novel burnable fuel design composed of an oxide pellet containing a lumped Gd₂O₃ rod, mini-pellet, or spherical particle to improve the performance of nuclear reactors through longer fuel cycle and better fuel utilization. The interfacial cracks were eliminated by controlling the initial density of the lumped Gd₂O₃.

The paper proposes a model to design an optimal biofuel supply chain considering economic, environmental, and societal objectives. The resulting biofuel supply chain can achieve a 21% reduction of the transportation emission, a 33% increase of the profit, and a 2% augmentation of the market share compared to the benchmark scenario.

Firing of oil shale with semicoke and biomass in oxy-fuel combustion process can give an effective solution for the use of the heating value of semicoke. Furthermore, multifuel combustion with the optimum ratios can be a promising alternative to meet future emission targets and reduce the environmental impact in terms of the reduction of CO₂ and waste ash emissions from oil shale processing and oil shale-based power sector.

In this paper, a passive technique to improve temperature uniformity in a simple battery pack by adding an inlet plenum is examined. The focus is placed on enhancing temperature uniformity and reducing the maximum temperatures at the cell and pack level. This battery pack has a very simple configuration, requires no moving parts, and introduces mixing and turbulence in the air flow to provide a high level of temperature uniformity.

A carbon capture system of reheating furnace flue gas, based on the sensible heat of continuous casting slabs, is designed in this paper. By using Aspen Plus to optimize parameters of the capture system, the regeneration energy consumption is obtained and the result is verified by comparing the data with that of other research. Main parameters of continuous casting slabs and the heat recovery boiler are also calculated.

• This research work investigates the performance characteristics of the thermoelectric modules connected in different configurations under homogeneous and heterogeneous temperature difference condition.
• The optimal series-parallel combination for maximizing the load power is square series-parallel configuration, whose maximum load power is 95.5%, compared to the reference load power.
• The series, parallel, and square series-parallel configurations are connected as star to obtain 3 separate DC outputs to power the DC microgrid applications.