New Type of Distributed Biomass Combustion Device Necessity and Feasibility in China

2011 ◽  
Vol 383-390 ◽  
pp. 4013-4016
Author(s):  
Chang Le Pang ◽  
Li Chen ◽  
Ren Jie Dong
Keyword(s):  
Rural Areas ◽  
High Efficiency ◽  
Low Cost ◽  
Biomass Combustion ◽  
Combustion System ◽  
Human Beings ◽  
New Type ◽  
Energy Products ◽  
The Ideal ◽  
Commercial Energy

Worldwide changes in climate and environment forced us human beings to seek for alternatives to replace commercial energy products like coal and petroleum. However, there have some difficulties to promote commercial energy products in China’s rural areas and newly urbanized areas. Biomass combustion system will become one of the ideal devices for such areas in a period of time. It is necessary to develop new types of biomass combustion system consisting of gasification or Semi-Gasification and combustion units so that it can provide high efficiency and low cost for household purposes.

scholarly journals Experimental Measurement of Rice Husk Effectiveness as an Alternative Adsorbent for Turbidity Reduction in Synthetic Water

2019 ◽  
Vol 22 (4) ◽  
pp. 329-334
Author(s):  
Noora Saad Faraj Al-Dulaimi ◽  
Samara Saad Faraj Al-Dulaimi
Keyword(s):  
Rice Husk ◽  
Rural Areas ◽  
Urban Areas ◽  
High Efficiency ◽  
Low Cost ◽  
Water Turbidity ◽  
Cheap Alternative ◽  
Quality Water ◽  
Ph Level ◽  
The Cost

Providing a clean and high quality drinking water to both rural as well as urban areas is a great challenge by itself, adding to it the large volume requirements of such water at high population areas means a very high cost for such industry because mainly of the cost of expensive commercially available adsorbent used in this process. This led inhabitants of the remote and/or rural areas to use less quality water with all its risks and health challenges. In this study, a locally collected rice husk is tested to be used as an alternative adsorbent to the expensive common commercial ones. Parameters like adsorbent dosage, initial concentration of turbidity, and pH level were tested to investigate their effects on the process. Treatment of synthetic turbid water was done after changing these parameters to measure the effect of each parameter alone and the results showed a set of parameters that can be used to achieve high efficiency of turbidity removal. The study concluded that rice husk can be used as a well cheap alternative adsorbent to reduce the river water turbidity due to its availability and low cost with a decent removal efficiency approaching 95%.

CVD Diamond Film Polishing Based on Accelerant Theory

2012 ◽  
Vol 497 ◽  
pp. 185-189
Author(s):  
Li Zhang ◽  
Shao Jie Ding ◽  
Dong Hui Wen ◽  
Zhen Hao Xu ◽  
Shi Ming Ji
Keyword(s):  
Diamond Film ◽  
High Efficiency ◽  
Low Cost ◽  
Cvd Diamond ◽  
Reaction Rates ◽  
Precision Machining ◽  
Key Technologies ◽  
Ultra Precision ◽  
New Type ◽  
Cvd Diamond Film

CVD diamond has become the mainstream trend for the development of diamond. Its ultra precision machining is one of the key technologies for expanding the application of CVD diamond film. The efficient polishing method is studied, called accelerant polishing technology, which can lower the activation energy needed in diamond graphitization by the accelerant action of transition metal. It accelerates reaction rates of graphitization and promotes the implementation of diamond’s removal mechanism. Experimentation results indicate that the polishing method is one new type of precision polishing technology with low cost and high efficiency.

Effect of Stator Structure and Field Analysis of a New Type Single-Phase Induction Motor

2012 ◽  
Vol 229-231 ◽  
pp. 907-910
Author(s):  
Hui Zhong ◽  
Xiu He Wang ◽  
Cheng Zhang ◽  
Ming Yin
Keyword(s):  
Induction Motor ◽  
Single Phase ◽  
High Efficiency ◽  
Low Cost ◽  
Field Analysis ◽  
Stator Windings ◽  
Magnetic Field Analysis ◽  
Dimensional Finite Element ◽  
New Type ◽  
Type Motor

The new type single-phase induction motors with three stator windings are brought forward for there high efficiency and low cost. However, the unbalance current density in the stator windings is still a problem to the design of this type motor. This paper presents the asymmetrical stator windings and slots structure in the motor design to get the currents density balance. A magnetic field analysis of the new type tri-winding induction motor is preformed using a two-dimensional finite element method. The Maxwell stress method is used to compute the air gap torque that is required for solving the equation of motion. The perfomance of the motor with different structure stator are compared and analysised.

Recent Patents on Wall Climbing Robot with Negative Pressure Adsorption

2019 ◽  
Vol 13 (3) ◽  
pp. 201-211
Author(s):  
Dedong Tang
Keyword(s):  
Negative Pressure ◽  
Manufacturing Industry ◽  
High Efficiency ◽  
Low Cost ◽  
Nuclear Industry ◽  
Stable Operation ◽  
Human Beings ◽  
Climbing Robot ◽  
Fire Control ◽  
Human Labor

Background: The wall climbing robot is an automatic mechanical device capable of being adsorbed on the wall surface and carrying out various predetermined work. Compared with human labor, the wall climbing robot has the advantages of high efficiency, low cost and stable operation quality. It can replace human beings to accomplish various dangerous work, reduce the risk and labor intensity of high-altitude operation, and greatly promote the improvement of productivity. At present, wall climbing robot has been widely used in the construction industry, fire control, nuclear industry, petrochemical industry and manufacturing industry. Objective: I will review related patents of wall climbing robot with negative pressure adsorption and illustrate their structure and working principle. The results of the analysis can provide some meaningful reference for the optimal design of this kind of robot. Methods: Based on the comparative analysis for the latest patents related to wall climbing robot with negative pressure adsorption, the key problem and future development of the wall climbing robot are put forward. Results: The patents of the wall climbing robot with negative pressure adsorption are classified in the paper. Studies show that remarkable improvements have been achieved in the invention on the climbing robot. Conclusion: In the tomorrow, the adsorption technology, optimization of moving mode, structure miniaturization and intelligent control should be further studied.

scholarly journals Application and Validation of a Municipal Administrative Area Spatial Zoning Model in Village-Town System Planning

2019 ◽  
Vol 11 (7) ◽  
pp. 1855 ◽  
Author(s):  
Yujing Zhao ◽  
Hong Leng ◽  
Pingjun Sun ◽  
Qing Yuan
Keyword(s):  
Land Use Planning ◽  
Rural Areas ◽  
High Efficiency ◽  
Low Cost ◽  
Model Development ◽  
Urban System ◽  
Planning Model ◽  
System Planning ◽  
Administrative Area ◽  
Urban And Rural Areas

The overall planning of urban and rural areas is the focus of municipal administrative area (MAA) planning in the process of economic globalization, and village-town system planning is the key to the overall planning of urban and rural areas. Based on the theory of spatial equilibrium and economic logic, an objective municipal administrative area spatial zoning model (M-MSZ) was constructed in our previous study. The M-MSZ model can provide guidance in the planning of a village-town system. This paper takes a city in the south of Heilongjiang Province in China as an example and compares the M-MSZ model with six traditional MAA spatial zoning models (the urban growth boundary model, land use planning model, spatial governance zoning model, major MAA location, layout and planning model, development timing-order and zoning model, and scale and function zoning model) to verify the value and superiority of the M-MSZ model in the planning of a village-town system. The consistency Kappa values were 78.2%, 83.3%, 82.3%, 79.8%, 75.7%, and 83.9%, respectively, which means that the M-MSZ model was highly consistent with those comparison models. Meanwhile, the regression coefficient R2 is higher than that of the traditional spatial zoning models, which means that the objectivity of the M-MSZ model is higher than that of traditional models. The superiority of the M-MSZ model over the traditional MAA spatial zoning model lies not only in its capacity to grasp the core content of village-town system planning, but also in its capacity to unify the decentralized urban system planning models that are used for village-town system planning, while realizing the objectivity of a weight assignment. Its unified model structure, objective integrated model system, and high accuracy make the M-MSZ model capable of solving the key problems associated with village-town system planning, with many advantages, such as easy operation, high efficiency, good inheritance, low cost, and greater objectivity, detail, and accuracy. In addition, it can provide a reference for the development model of a MAA village-town system.

scholarly journals A microbial ecosystem: agricultural Jiaosu achieves effective and lasting antifungal activity against Botrytis cinerea

AMB Express ◽  
2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yue Zhang ◽  
Youhui Gao ◽  
Zehui Zheng ◽  
Xingyao Meng ◽  
Yafan Cai ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Antifungal Activity ◽  
Botrytis Cinerea ◽  
Rural Areas ◽  
High Efficiency ◽  
Low Cost ◽  
Inhibitory Effect ◽  
Biological Agent ◽  
Microbial Ecosystem ◽  
Long Acting

AbstractSynthetic fungicides are eco-unfriendly to agriculture and the environment. Agricultural Jiaosu (AJ), which originates from organic wastes, has the potential to be a substitute for synthetic fungicides. In this study, the characteristics of AJ and its antifungal activity against Botrytis cinerea were investigated for the first time. AJ was rich in lactic acid (4.46 g/L), acetic acid (1.52 g/L), Lactobacillus (72.45%) and Acetobacter (15.23%), which was a microbial ecosystem consisting of acid-based substances (AS) and beneficial microorganisms (BM). The results of the antifungal assays suggested that B. cinerea was effectively inhibited by AJ, with the half-maximal inhibitory concentration (IC50) of 9.24%. AJ showed the strongest and most-lasting inhibitory effect compared to cell-free supernatant and microbial solution of AJ, indicating that AS and BM and their synergistic effect contributed to the antifungal activity of AJ. Two-step inhibition’ is an antifungal mode of AJ. Firstly, AS not only inhibited the pathogen directly but also provided a dominant niche for BM of AJ. Then, BM in AJ, especially Acetobacter, proliferated and metabolized acetic acid continuously. Thus, AJ achieved high-efficiency and long-acting inhibition. AJ is a promising biological agent considering its features of an eco-friendly, low-cost and easy-to-operate biological agent in rural areas.

scholarly journals A bridgeless CUK PFC converter with positive output voltage

2021 ◽  
Vol 39 (3) ◽  
pp. 611-616
Author(s):  
Yigeng Huangfu ◽  
Aiben Wang ◽  
Ben Zhao ◽  
Yuhui Ma ◽  
Rui Ma ◽  
...  
Keyword(s):  
Output Voltage ◽  
High Efficiency ◽  
Low Cost ◽  
Current Control ◽  
Switching Loss ◽  
Amplifier Circuit ◽  
Power Frequency ◽  
Converter Topology ◽  
New Type ◽  
State Of Power

The output voltage of the traditional CUK PFC converter is negative, and an additional inverting amplifier circuit is needed, which increases the volume and cost of the converter. A new type of bridgeless CUK PFC converter topology is proposed in this paper, which makes the converter have a positive output voltage without the need of an additional inverting amplifier circuit, and has the advantages of simple control, high efficiency, and low cost. Through topology optimization, one input capacitor is reduced, and the two diodes are converted from the high-current working state of high frequency to low-current working state of power frequency, ordinary rectifier diodes can be selected instead of fast recovery diodes, thereby reducing the volume and cost of the converter. The converter works in DCM, so no current control loop is required, which simplifies the control circuit. In addition, the main switch is turned on under ZVS condition, and the output diode is turned off under ZCS condition, which reduces the switching loss and improves the efficiency of the converter. A simulation model was built in PSIM, and a prototype with a rated power of 150 W was fabricated to verify the effectiveness and superiority of the proposed converter. Experimental results show that the PF of the proposed converter is 0.995 7, and the input current THD is 3.78% under rated input conditions.

An Estimation of the Performance Limits of Dry Cooling on Trough-Type Solar Thermal Plants

2008 ◽  
Author(s):  
Huifang Deng ◽  
Robert F. Boehm
Keyword(s):  
Power Plants ◽  
High Efficiency ◽  
Cooling System ◽  
Low Cost ◽  
Performance Limits ◽  
Cooling Systems ◽  
Solar Power Plants ◽  
Solar Resource ◽  
Dry Cooling ◽  
The Ideal

The southwestern US is an ideal location for solar power plants due to its abundant solar resource, while there is a difficulty in implementing wet cooling systems due to the shortage of water in this region. Dry cooling could be an excellent solution for this, if it could achieve a high efficiency and low cost as wet cooling. Some dry cooling systems are currently in operation, and investigations of their performance have been reported in the literature. This paper looks into the limits to the power production implicit in dry cooling, assuming that improvements might be made to the system components. Use of higher performance heat transfer surfaces is one such possible improvement. We have developed a model of a fairly typical, but simplified, solar trough plant, and simulated thermodynamic performance of this with the software Gatecycle. We have examined the power generation and cycle efficiency of the plant for the Las Vegas vicinity with conventional wet cooling and conventional dry cooling cases considered separately using this software. TMY2 data are used for this location for this purpose. Similarly, the same studies are carried out for “ideal” cooling systems as a comparison. We assumed that in the ideal dry cooling system, the condensing temperature is the ambient dry bulb temperature, and in the ideal wet cooling system, it is the ambient wet bulb temperature. It turned out that the ideal dry cooling system would significantly outperform the conventional wet cooling system, indicating the possibility of the dry cooling system being able to achieve increased performance levels with component improvements.

A new type of high efficiency with a low‐cost solar cell having the structure of a μc‐SiC/polycrystalline silicon heterojunction

1990 ◽  
Vol 67 (10) ◽  
pp. 6538-6543 ◽  
Author(s):  
Y. Matsumoto ◽  
G. Hirata ◽  
H. Takakura ◽  
H. Okamoto ◽  
Y. Hamakawa
Keyword(s):  
Solar Cell ◽  
Polycrystalline Silicon ◽  
High Efficiency ◽  
Low Cost ◽  
New Type

scholarly journals Research on Dynamic Facility Layout Problem of Manufacturing Unit Considering Human Factors

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Jinying Li ◽  
Xin Tan ◽  
Jinchao Li
Keyword(s):  
Industry 4.0 ◽  
High Efficiency ◽  
Low Cost ◽  
Facility Layout ◽  
Mathematic Model ◽  
Human Beings ◽  
Human Machine Interaction ◽  
Bee Colony ◽  
Penalty Factor ◽  
Adaptive Penalty

As many said, industry 4.0 is an epoch-making revolution which brought the manufacturing market much faster changes and severer competitions. As an important part of the manufacturing system, facility layout has direct impact on business benefit; at the same time, despite the intelligent factory, intelligent production has its own characteristics. However, there is one point on which industry and academia have basically formed a consensus: it is not true that industry 4.0 does not need human beings; on the contrary, human initiative plays an unabated role in the development of industry 4.0. This paper will focus on the dynamic facility layout of the manufacturing unit. Based on the system above and the traditional optimization model, a mathematic model is built to find the best solution combining safety, sustainability, high efficiency, and low cost. And penalty function with adaptive penalty factor and advanced artificial bee colony algorithm is used to solve the constrained model. In the end, by studying few cases, the model is proved to be effective in both efficiency improvement and the implementation of safe and comfort human-machine interaction.

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