Based on the three-dimensional physical model of shell and tube heat exchanger, by means of computational fluid dynamics (CFD) software, the RANS k-Epsilon turbulent model and the Mixture model were adopted to simulate the flow properties and heat transfer in the shell side. And the reliability of the...

The Sm-ZrO2-ZnO catalyst prepared by hydrothermal method is proved to be superior in stably photocatalytic degradation of Rhodamine-B under simulant solar light irradiation. Sm doping improves the ultraviolet and visible light absorbance. Composition of ZnO with ZrO2 leads to enhancement of ultraviolet...

There are many electric vehicles charging stations in distribution network.Uncoordinated charging electric vehicles load is large and changes quickily,it brings risk to the operation of power grid. If taking each station as an independent unit, which will reduce the practicability of the proposed strategy...

High performance concrete is widely used in research and Engineering, the research progress of high performance concrete admixture is very rapid. The straw ash base contains a large amount of silica, It has certain pozzolanic activity, It is an excellent material to replace some cement and reduce the...

Wind energy is widely used as clean, renewable and mature new energy. However, the inhomogeneity and non-steady state of the operating environment of the wind turbine lead to the randomness of the load, which will cause the fluctuation of the voltage and frequency of the power grid, and affect the power...

In our work, pomelo peel was used as raw material and carbonized by hydrothermal treatment and calcination in air, respectively, to obtain the corresponding pomelo peel biochar. The effects of two different treatment conditions on the adsorption and photocatalysis performance of the product were investigated....

The main research of this paper is that there are three modes between urban rail transit and other means of transportation.The paper combines a large amount of practical research and data to analyze at different levels:the first one is the transfer connection between urban rail transit and urban external...

In the practical application of the ground coupled heat pump project, when the heat extracted from the soil does not match the heat released to the soil, it will cause the load imbalance and the change of soil temperature, which will lead to the gradual decrease of the operating efficiency of the heat...

In order to promote the outlet temperature and heat collection efficiency of solar air collector, this study puts forward a folded baffle solar air collector, which can improve the heat collection efficiency of the collector by enhancing the air turbulence inside the flow passage and increasing the heat...

As a natural passive cooling technology, nocturnal radiator can reject heat into the sky by electromagnetic infrared radiator exchange. In order to take full use of nocturnal radiator for cooling provision at night, this paper put forward two types of novel nocturnal cooling radiators in panel structure...

In view of the low heat collector efficiency of the solar air collector, a semicircular endothermic plate air collector is proposed to enhance the turbulence intensity between the air and the endothermic plate to improve the collector efficiency of the collector. The results show that the upper and lower...

For a reheat-regenerative cycle steam turbine, the increased superheat of extraction steam after reheating causes the regenerative effect to weaken. Steam cooler can make rational use of the superheat of the extraction steam to improve the thermal efficiency of steam turbine. Based on the heat balance...

Single industrial structure and lagged urban construction have severely restricted the development of city-industry integration and new urbanization in resource-based cities. Promoting the city-industry integration with science and technology innovation has become an important path for resource-based...

Hot and humid environments are ubiquitous in some special workplaces, such as deep mines, aviations, and military territories. High–temperature radiation is a serious threat to the health of high temperature operation personnel. Exposed to high temperatures for a long time will inevitably lead to dehydrations,...

It is a significant topic of the development of Chinese macro economy in medium and long term to build high-efficiency modern energy system and balance the relation between ecological environmental protection and development of economic society. Based on the theory of sustainable development, the domestic...

In order to reduce the environmental sensitive frequency of electret-based vibration electrostatic energy harvester (E-VEH), an up-conversion structure is designed. This harvester is a double cantilever structure includes a low frequency beam and high frequency beam. Electret is bounded to the high frequency...

In this work, a stirring and heating test system was built. An experiments at different rotational speeds within 1 h has been done for three working fluids: water, 46 # hydraulic oil and saturated NaCl. Under the ideal state without considering the energy loss, the results show that the temperature rise...

With the rapid development of clean energy substitution, problems such as the difficulty of pv absorption, the large investment in clean heating power grid transformation and the utilization rate of equipment appear. In this paper, the design of photovoltaic and clean heating, and the design of the integrated solution, and by providing the power of the solar power plant in the surrounding areas, is to maximize the use of clean energy, minimize the power grid investment, and minimize the impact of the power grid. After...

Tungsten oxide nanomaterials were deposited on flexible conductive carbon fiber sheets by a simple thermal evaporation method and compared with conventional hydrothermal tungsten oxide nanomaterials. The morphology and composition of the product were characterized by X-ray diffraction and scanning electron...

A Stirling cycle solar wind combined power generation system was designed, and a theoretical analysis model of the power and efficiency for each subsystem of the system was theoretically constructed. Firstly, the Stirling machine and the solar cooker are used to focus on the solar energy. The vertical...

To study the impacts of clean energy industry development on economic growth, we have established an econometric model based on the Cobb-Douglas production function. The methods mainly include the cointegration test, vector auto regression model (VAR), vector error correction model (VECM), Granger causality...

Volatile organic compounds (VOCs) from breathing loss of storage tanks account for more than 50% in chemical enterprises, so it is necessary to study the leakage and diffusion law of breathing loss in tank areas. In this paper, the empirical formula of China Petrochemical system was used to calculate...

In this paper, the problems in the Beijing wind power Generation connected to grid are studied, and the interaction between wind power and power grid are further studied after the large-scale wind power is integrated into the power grid. This paper briefly analyzes the problems between wind power system...

China suffers about 70,000 tons of textile wastes every day and 2.5 billion tons of wastewater every year. As of 2050, the carbon emission each year of the clothing industry will account for a quarter of that around the globe. However, it is an inevitable trend for the clothing industry to gradually...