Evaluation of resource and energy utilization, environmental and economic benefits of rice water-saving irrigation technologies in a rice-wheat rotation system

This paper deals with the problem of energy utilization efficiency evaluation of a microturbine system for Combined Cooling, Heating and Power production (CCHP). The CCHP system integrates power generation, cooling and heating, which is a type of total energy system on the basis of energy cascade utilization principle, and has a large potential of energy saving and economical efficiency. A typical CCHP system has several options to fulfill energy requirements of its application, the electrical energy can be produced by a gas turbine, the heat can be generated by the waste heat of a gas turbine, and the cooling load can be satisfied by an absorption chiller driven by the waste heat of a gas turbine. The energy problem of the CCHP system is so large and complex that the existing engineering cannot provide satisfactory solutions. The decisive values for energetic efficiency evaluation of such systems are the primary energy generation cost. In this paper, in order to reveal internal essence of CCHP, we have analyzed typical CCHP systems and compared them with individual systems. The optimal operation of this system is dependent upon load conditions to be satisfied. The results indicate that CCHP brings 38.7 percent decrease in energy consumption comparing with the individual systems. A CCHP system saves fuel resources and has the assurance of economic benefits. Moreover, two basic CCHP models are presented for determining the optimum energy combination for the CCHP system with 100kW microturbine, and the more practical performances of various units are introduced, then Primary Energy Ratio (PER) and exergy efficiency (α) of various types and sizes systems are analyzed. Through exergy comparison performed for two kinds of CCHP systems, we have identified the essential principle for high performance of the CCHP system, and consequently pointed out the promising features for further development.

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Research on Fault Analysis and Fault Diagnostics Technology for Large-Size Equipments in Stopes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.706-708.957 ◽

2013 ◽

Vol 706-708 ◽

pp. 957-962

Author(s):

Bao Cai Zhang ◽

Meng Shao ◽

Guo Ming Du

Keyword(s):

Economic Benefits ◽

Fault Analysis ◽

Test Analysis ◽

Status Monitoring ◽

Rotation System ◽

Analytical Reasoning ◽

Large Size ◽

Operation Process ◽

Current Voltage ◽

Lifting System

At present,the main equipments is electric shovels of Dagushan Iron Ore Mine, Due to a variety of factors, inevitably, there are many faults, overcurrent, overvoltage and overload are the ones with highest incidence. at the same time, the lifting system, push-press system, rotation system on the electric shovel and the overcurrent protection system of the main transformer will make appropriate actions and instantaneously shut down the electric shovel. In this article, microcomputer as its control core, It can comprehensively take use of equipment status monitoring technology, test analysis technology, signal processing technology, embedded technology, etc., carry out analytical reasoning for the equipment status information during operation process of electric shovel such as current, voltage, etc., according to the simulation experiment and operation inspection and test, the large-size equipment diagnosis & analysis device is completed for stopes has the advantages such as full-featured functions, convenient and reliable operation, considerable economic benefits.

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Utilization of Biodegradable Wastes as a Clean Energy Source in the Developing Countries: A Case Study in Myanmar

Energies ◽

10.3390/en11113183 ◽

2018 ◽

Vol 11 (11) ◽

pp. 3183 ◽

Cited By ~ 13

Author(s):

Maw Tun ◽

Dagmar Juchelková ◽

Helena Raclavská ◽

Veronika Sassmanová

Keyword(s):

Energy Source ◽

Developing Countries ◽

Greenhouse Gas ◽

Clean Energy ◽

Economic Benefits ◽

Current Situation ◽

Energy Utilization ◽

Waste To Energy ◽

Ghg Emission ◽

Clean Energy Source

Nowadays, waste-to-energy has become a type of renewable energy utilization that can provide environmental and economic benefits in the world. In this paper, we evaluated the quality of twelve biodegradable waste samples from Myanmar by binder laboratory heating and drying oven at 105 °C. The calculation methods of the Intergovernmental Panel on Climate Change (IPCC) and Institute for Global Environmental Strategies (IGES) were used for the greenhouse gas emission estimation from waste disposal at the open dumpsites, anaerobic digestion, and waste transportation in the current situation of Myanmar. Greenhouse gas (GHG) emission and fossil fuel consumption of the improved biodegrade waste utilization system were estimated and both were found to be reduced. As a result, volume and weight of the biodegradable wastes with 100% moisture reduction were estimated at approximately 5 million cubic meters per year and 2600 kilotonnes per year, respectively, in 2021. The total GHG emissions in the current situation amounted to approximately 1500 and 1800 Gigagrams of CO2-eq per year in 2019 and 2021, respectively, while the total GHG emission avoidance from a sustainable approach amounted to 3500 and 4000 Gigagrams of CO2-eq per year, respectively. The study aimed at highlighting the utilization of biodegradable wastes as a clean energy source in developing countries.

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Policy reforms to promote efficient and sustainable water use in Swiss agriculture

Water Policy ◽

10.2166/wp.2012.152 ◽

2012 ◽

Vol 14 (5) ◽

pp. 887-901 ◽

Cited By ~ 1

Author(s):

Robert Finger ◽

Niklaus Lehmann

Keyword(s):

Water Resources ◽

Water Use ◽

Sustainable Use ◽

Water Saving ◽

Water Withdrawal ◽

Policy Reforms ◽

Environmental Laws ◽

Scarce Water ◽

Irrigated Crops ◽

Irrigation Technologies

The more sustainable use of scarce water resources is a policy goal in several countries. In this regard, current discussions on potential policy reforms in Switzerland revolve around the subsidization of water-saving irrigation technologies. Today, the share of drip irrigation systems is low, at 3%. In Switzerland, environmental laws specify levels of water flow that must not be undercut. Variable pricing of water, however, has not yet been used. This paper analyzes whether subsidies on water-saving irrigation techniques would be beneficial in this legislative setting, and shows that such subsidies may have crowding out effects because they could provide incentives to switch from non-irrigated crops (e.g. wheat) to the production of crops (e.g. potatoes) that require irrigation. This may result in even higher water withdrawal rates. Such an increased competition for water resources may also result in adverse conditions for farmers. By contrast, our analysis shows the implementation of water prices could lead to a sustainable increase in the share of water-saving technologies, to a shift from irrigated to non-irrigated crops, and therefore to a reduction of overall water use in agriculture. Thus, the introduction of water prices should have absolute priority if agricultural water policies are reformed in Switzerland.

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Post-seasonal effects of water-saving rice production regimes on N2O emissions in an annual rice-barley rotation system

CATENA ◽

10.1016/j.catena.2019.104112 ◽

2019 ◽

Vol 182 ◽

pp. 104112

Author(s):

Jie Chen ◽

Shuqing Li ◽

Chen Li ◽

Hong Wang ◽

Yajun Geng ◽

...

Keyword(s):

Water Saving ◽

Rice Production ◽

Seasonal Effects ◽

N2o Emissions ◽

Rotation System

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Water Saving and Yield Enhancing Micro Irrigation Technologies in India: Theory and Practice

India Studies in Business and Economics - Micro Irrigation Systems in India ◽

10.1007/978-981-10-0348-6_2 ◽

2016 ◽

pp. 13-36 ◽

Cited By ~ 3

Author(s):

M. Dinesh Kumar

Keyword(s):

Water Saving ◽

Theory And Practice ◽

Micro Irrigation ◽

Irrigation Technologies

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Application Analysis of Water Saving in Thermal Power Plant

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.508.312 ◽

2014 ◽

Vol 508 ◽

pp. 312-315 ◽

Cited By ~ 1

Author(s):

Hui Li ◽

Jing Long Liang

Keyword(s):

Power Plant ◽

Thermal Power Plant ◽

Thermal Power ◽

Water System ◽

Economic Benefits ◽

Water Saving ◽

Environmental Benefits ◽

Chemical Methods ◽

Physical Chemical ◽

Application Analysis

Water saving in power plant is mainly manifested in the use of less water system technology and recycling use of water in two aspects. Based on the typical thermal power plant water analysis, summarizes the main water links, and according to the characteristics of each stage, and puts forward the corresponding water-saving scheme. On the other hand, through some effective physical chemical methods, can improve water quality, so as to achieve some technology requirements, in order to achieve water recycling. By adopting a practical solution, final implementation economic benefits, social benefits and environmental benefits of unity.

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