Steel Science Portal

Journal of the Japan Institute of Energy
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up
ONLINE ISSN: 1882-6121
PRINT ISSN: 0916-8753

Journal of the Japan Institute of Energy Vol. 90 (2011), No. 6

  • Economic and Environmental Evaluation of Biomass Utilization Energy Systems - Analysis on the Wood Tip Biomass Cogeneration System for an Industrial User -

    Yasushi ISHIDA, Masaaki BANNAI, Takahiko MIYAZAKI, Shinichi NAKAZAWA, Ryuichi YOKOYAMA

    pp. 547-553

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.90.547

    Abstract

    The study evaluated the biomass cogeneration system (BCGS) and the biomass steam generation system (BSGS) from the viewpoints of CO2 emissions reduction and the profit of the project. The energy, cost and CO2 emissions of BCGS and BSGS for an industrial user were predicted by simulation. The effects of the cost and CO2 savings were estimated by the comparison with a conventional system that was consisted of the grid electricity and oil boilers. The profitability of the system was evaluated by the net present value (NPV) and the internal rate of return (IRR). The results showed that the BCGS produced a larger NPV, while the BSGS had a higher IRR. It was also found that the BCGS could mitigate the risks on the profitability caused by the fluctuation of the energy prices.

  • Study on Electricity Consumption for Domestic Refrigerators, Air Conditioners, and Water Dispenser in Guangzhou (China) urban area based on Questionnaire Data

    Yasuhiko KONDOU, Akinobu MURATA, Kimiko YAMADA, Kazuhiko SAKAMOTO, Weisheng ZHOU

    pp. 554-561

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.90.554

    Abstract

    In China, since the 1990's, as household incomes have increased, many kinds of appliances have been purchased, causing the electricity demand to grow from year to year. Widely-used air conditioners and recently penetrated water dispensers, in particular, contribute mainly to increased electricity consumption in the household sector. In this context, we conducted a study to provide descriptive information on the effects of this recent electricity consumption of installed air conditioners, refrigerators, water dispensers, and the standby power of electric devices of urban households in Guangzhou based on the result of our survey in 2004. The result of this study suggests that in terms of water dispensers extending operation time is a serious factor affecting increased electricity consumption. Moreover, replaced air conditioners for power saving may not be enough to reduce the growing electricity consumption.

  • Greenhouse Gas Emissions by Land Use Change for Cellulosic Energy Crop Production

    Hirotsugu KAMAHARA, Yuki KUDOH, Yutaka GENCHI, Tomoaki MINOWA MINOWA, Masayuki SAGISAKA

    pp. 562-568

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.90.562

    Abstract

    Cellulosic energy crop has been expected as a feedstock of second generation biofuels which can avoid the competition with food production. However, concern about impact of land use change still exists, for cultivation of cellulosic energy crop requires vast land area to supply biofuel as an economically-viable alternative energy source. Therefore, this study evaluated the greenhouse gas (GHG) emission by land use change (LUC) from marginal land to plantation of cellulosic energy crop such as grass crop and fast wood forestry. First, the GHG emissions by LUC were estimated by using default value which was set based on IPCC methodology and literature review. Five warm temperate and tropical climate regions were selected in this paper. The results showed that the GHG emissions by LUC were estimated to be -5.3~10.4 g-CO2eq/MJ for grass crop and -2.3~5.6 g-CO2eq/MJ for fast wood forestry. The minimum emissions were observed in climate zone of warm temperate dry, whereas the maximum emissions were observed in tropical wet. The maximum emissions were accounted for 13 % of GHG emission by gasoline use. Finally, this study discussed the condition of biomass carbon stock for the previous land use to archive 50% GHG reductions from gasoline use.

  • Development of Technology of Slagless Combustion of Agricultural Wastes (Straw) and Designing and Manufacturing of Boilers Where This Technology is Applied

    Rafail ISEMIN, Sergey KUZMIN, Alex MIKHALEV, Valentin KONYAKHIN, Alex ZORIN, Dmitriy VIRAYASOV

    pp. 569-572

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.90.569

    Abstract

    The results of the research on combustion of granular agricultural wastes (straw) in a fluidized bed formed by granules and solid products of their combustion are introduced. The proposed technology allows to prevent slag and ash agglomeration in a bed which usually obstructs the normal work of a boiler when we use known burning technologies (in a dense bed and fluidized bed of an inert material). The researches are carried out in accordance with the results of the analysis of statistical characteristic variations of pressure drop pulsations in a bed and it allows to diagnose slagging in a bed at an early stage of agglomerate formation.
  • © 2011 The Japan Institute of Energy

Article Access Ranking

03 Jul. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. Production and Technology of Iron and Steel in Japan during 2019 ISIJ International Vol.60(2020), No.6
  3. Influence of H2–H2O Content on the Reduction of Acid Iron Ore Pellets in a CO–CO2–N2 Reducing Atmosphere ISIJ International Advance Publication
  4. Scheduling in Continuous Steelmaking Casting: A Systematic Review ISIJ International Vol.60(2020), No.6
  5. Preface to the Special Issue on “Behaviour of Light Elements in Steels and Its Effects on Microstructure and Properties” Tetsu-to-Hagané Vol.106(2020), No.6
  6. Sinter Pot for Temperature Measurement of the Top Layer during and After the Ignition ISIJ International Advance Publication
  7. Numerical Simulation of Fluid Flow and Solidification in a Vertical Round Bloom Caster Using a Four-port SEN with Mold and Strand Electromagnetic Stirring ISIJ International Advance Publication
  8. Taguchi Orthogonal Test on Granule Properties and Porosity Distribution in Sintering Bed using High-resolution X-ray Computed Tomography ISIJ International Vol.60(2020), No.6
  9. From Iron Ore to Crude Steel: Mass Flows Associated with Lump, Pellet, Sinter and Scrap Iron Inputs ISIJ International Vol.60(2020), No.6
  10. Deoxidation of Electroslag Remelting (ESR) – A Review ISIJ International Vol.60(2020), No.6

Search Phrase Ranking

03 Jul. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. electric arc furnace
  5. bearing steel
  6. cao sio2 viscosity
  7. 17-7 ph
  8. inclusions
  9. big data
  10. cao