Energy analysis and economic assessment of a rice-turtle-fish co-culture system

2019 ◽  
Vol 43 (3) ◽  
pp. 299-309 ◽  
Author(s):  
Guibin Liu ◽  
Huang Huang ◽  
Jiangwei Zhou
Keyword(s):  
Culture System ◽  
Energy Analysis ◽  
Economic Assessment

Net Energy Analysis: An Economic Assessment

Science ◽  
1976 ◽  
Vol 192 (4235) ◽  
pp. 101-104 ◽  
Author(s):  
D. A. Huettner
Keyword(s):  
Energy Analysis ◽  
Economic Assessment ◽  
Net Energy

scholarly journals Design and Modelling of Technologies for Upgrading and Direct Methanation of biogas: energy analysis and economic assessment

2021 ◽  
Vol 238 ◽  
pp. 03002
Author(s):  
Alessandra Perna ◽  
Mariagiovanna Minutillo ◽  
Alessandro Sorce
Keyword(s):  
Lower Energy ◽  
Energy Analysis ◽  
Economic Assessment ◽  
Chemical Absorption ◽  
Biogas Upgrading ◽  
Economic Issues ◽  
Biogas Energy ◽  
Biomethane Production ◽  
Renewable Hydrogen ◽  
Economic Studies

The exploitation of the biomethane as transport fuel is receiving increasing attention in many European countries. Technologies and processes for improving the Biogas-to-biomethane production with a lower energy consumption and lower costs are objective of several techno-economic studies. In this paper two promising concepts for the biogas conversion are proposed and analyzed considering both technical and economic issues. The analysis regards the biogas upgrading by means of the chemical absorption with Hot Potassium Carbonate and the direct methanation of biogas by adding renewable hydrogen. In order to assess the feasibility of these technologies the numerical modelling has been applied for the plants designing. The energy results have then been used to assess the expected biomethane production price and a sensitivity analysis on the main parameters has been performed. Finally, economic performance of the options proposed will be evaluated under different market conditions.

scholarly journals Net Energy Analysis and Techno-Economic Assessment of Co-Production of Bioethanol and Biogas from Cellulosic Biomass

Fermentation ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 229
Author(s):  
Teeraya Jarunglumlert ◽  
Chattip Prommuak
Keyword(s):  
Cellulosic Ethanol ◽  
Energy Analysis ◽  
Market Price ◽  
Economic Assessment ◽  
Cellulosic Biomass ◽  
Energy Output ◽  
Selling Price ◽  
Net Energy ◽  
Minimum Ethanol Selling Price ◽  
Economic Studies

Co-production is a process based on the biorefinery concept that maximizes the benefit of biomass by reusing residue from the production of one product to produce others. In this regard, biogas is one of the most researched second products for the production of ethanol from cellulosic biomass. However, operating this scheme requires additional investment in biogas processing equipment. This review compiles data from research studies on the co-production of bioethanol and biogas from lignocellulosic biomass to determine which is more worthwhile: leaving the residue or investing more to benefit from the second product. According to previous research, ethanol stillage can be converted to biogas via anaerobic digestion, increasing energy output by 2–3 fold. Techno-economic studies demonstrated that the co-production process reduces the minimum ethanol selling price to a level close to the market price of ethanol, implying the possibility of industrializing cellulosic ethanol production through this scheme.

A General Method for Spectrometer Design in the Scoff Approximation

1976 ◽  
Vol 34 ◽  
pp. 538-539
Author(s):  
J. R. Fields
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Energy Analysis ◽  
Incident Beam ◽  
Scanning Transmission Electron Microscope ◽  
Chemical Identification ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
General Method

The energy analysis of electrons scattered by a specimen in a scanning transmission electron microscope can improve contrast as well as aid in chemical identification. In so far as energy analysis is useful, one would like to be able to design a spectrometer which is tailored to his particular needs. In our own case, we require a spectrometer which will accept a parallel incident beam and which will focus the electrons in both the median and perpendicular planes. In addition, since we intend to follow the spectrometer by a detector array rather than a single energy selecting slit, we need as great a dispersion as possible. Therefore, we would like to follow our spectrometer by a magnifying lens. Consequently, the line along which electrons of varying energy are dispersed must be normal to the direction of the central ray at the spectrometer exit.

EXELFS Studies of Carbon Fibers

1990 ◽  
Vol 48 (2) ◽  
pp. 72-73
Author(s):  
V. Serin ◽  
K. Hssein ◽  
G. Zanchi ◽  
J. Sévely
Keyword(s):  
Carbon Fibers ◽  
Energy Analysis ◽  
Electron Excitation ◽  
Complex Structures ◽  
High Modulus ◽  
Promising Technique ◽  
X Ray ◽  
Fine Structures ◽  
X Ray Absorption

The present developments of electron energy analysis in the microscopes by E.E.L.S. allow an accurate recording of the spectra and of their different complex structures associated with the inner shell electron excitation by the incident electrons (1). Among these structures, the Extended Energy Loss Fine Structures (EXELFS) are of particular interest. They are equivalent to the well known EXAFS oscillations in X-ray absorption spectroscopy. Due to the EELS characteristic, the Fourier analysis of EXELFS oscillations appears as a promising technique for the characterization of composite materials, the major constituents of which are low Z elements. Using EXELFS, we have developed a microstructural study of carbon fibers. This analysis concerns the carbon K edge, which appears in the spectra at 285 eV. The purpose of the paper is to compare the local short range order, determined by this way in the case of Courtauld HTS and P100 ex-polyacrylonitrile carbon fibers, which are high tensile strength (HTS) and high modulus (HM) fibers respectively.

Effects of hydroponic culture system and NaCl on interactions between common bean lines and native rhizobia from Tunisian soils

Agronomie ◽  
2001 ◽  
Vol 21 (6-7) ◽  
pp. 601-605 ◽  
Author(s):  
Moez Jebara ◽  
Jean-Jacques Drevon ◽  
Mohamed Elarbi Aouani
Keyword(s):  
Common Bean ◽  
Culture System ◽  
Hydroponic Culture

A Fault Detection Approach Based on Sound Signal Analysis for Equipment Monitoring

2020 ◽  
pp. 129-139
Author(s):  
Weihai Sun ◽  
Lemei Han
Keyword(s):  
Fault Detection ◽  
Signal Analysis ◽  
Energy Analysis ◽  
Detection Method ◽  
Sound Signal ◽  
Practical Significance ◽  
Time Frequency ◽  
Detection Approach ◽  
Machine Fault ◽  
Learning Data

Machine fault detection has great practical significance. Compared with the detection method that requires external sensors, the detection of machine fault by sound signal does not need to destroy its structure. The current popular audio-based fault detection often needs a lot of learning data and complex learning process, and needs the support of known fault database. The fault detection method based on audio proposed in this paper only needs to ensure that the machine works normally in the first second. Through the correlation coefficient calculation, energy analysis, EMD and other methods to carry out time-frequency analysis of the subsequent collected sound signals, we can detect whether the machine has fault.

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