检索结果-南通市图书馆

农业工程 2015年第3期5卷 158-160页

作者： Samodini S nevase chittaranjan n gangde Sandip Gangil Anil Kumar Dubey 非常规能源与电气工程系Panjabrao Deshmukh Krishi Vidyapeeth博士实验室中央农业工程研究所农业能源和电力部

通过调查生物质发电厂得知,牧豆树常被选为下吸式气化炉的燃料。产气的特性由不同的成分、热值、密度和焦油含量所确定。气化炉的性能通过观察参数如燃料消耗量、比燃料消耗量、当量比、比产气率、比气化速率和气化效率来评价。在负荷20... 详细信息

通过调查生物质发电厂得知,牧豆树常被选为下吸式气化炉的燃料。产气的特性由不同的成分、热值、密度和焦油含量所确定。气化炉的性能通过观察参数如燃料消耗量、比燃料消耗量、当量比、比产气率、比气化速率和气化效率来评价。在负荷20 kW条件下,一氧化碳（CO）、氢气（H2）、二氧化碳（CO2）、甲烷（CH4）和氮（n2）体积百分比分别为18.4%、13.8%、11.1%、2.40%和54.2%。随着发动机负荷从5 kW增加到20 kW,气体的热值、密度和焦油含量变化范围分别为4.17～4.85 MJ/m3,1.16～1.56 kg/m3和10.0～10.2 mg/m3;燃料消耗速率、比燃料消耗速率、比气化速率、比产气率、当量比和气化效率变化范围为11～28 kg/h,1.40～2.20 kg/（kW·h）,29.63～75.43 kg/（m2·h）,103.7～257.43 m3/hm2,0.32～0.47和79.26%～89.90%。

关键词：生物质气化气化炉牧豆树产气

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Biomass energy cost and feasibility of gasifier based biomass power generation system

引用

International Journal of Agricultural and Biological Engineering 2013年第4期6卷 55-63页

作者： Khambalkar V P Kankal U S Karale D S gangde C n Department of Farm Power and Machinery College of Agricultural Engineering and Technology and Dr.Panjabrao Deshmukh Agricultural UniversityAkola MS 444104India

The present research work has been carried out on biomass based on 10 kW capacity gasifier power generation system installed at College of Agricultural Engineering and Technology,*** Deshmukh Agricultural University(***),Akola Maharashtra,*** main objectives were to evaluate various costs and benefits involved in the power generation *** costs of energy per unit were calculated for the first year of *** economics of gasifier based power generation system and thereby the feasibility of the system was examined by estimating per unit cost,net Present Value(nPV),Benefit Cost Ratio(BCR),Internal Rate of Return(IRR)and payback *** discount cash flow method was used to find out the *** the present analysis,three costs viz.,installed capital cost,operation and maintenance cost,and levelised replacement cost were examined for the evaluation of the power generation per *** rate on investment in case of subsidy(Case I)and in case without subsidy(Case II)for installation cost of system was considered as 12.75%.The BCR comes in Case I for operating duration of 22 h,20 h,and 16 h are 1.24,1.18,and 1.13,*** for Case II BCR comes 1.44,1.38,and *** IRR comes in Case I for operating duration of 22 h,20 h,and 16 h are 26%,22%,and 19%,*** for Case II,IRR comes 52%,44%,and 39%for operating duration of 22 h,20 h,and 16 h,*** payback period in the present analysis was worked *** payback period for biomass based gasifier power generation system was observed to be for Case I from three to four years and for Case II it was one to two years.

关键词： cost of biomass energy biomass power generation system discounted cash flow benefit cost ratio net present value payback period internal rate of return

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Litterfall,decomposition and nutrient release of Shorea robusta and Tectona grandis in a sub-tropical forest of West Bengal,Eastern India

引用

Journal of Forestry Research 2016年第5期27卷 1055-1065页

作者： chittaranjan Das naba Kumar Mondal Department of Environmental Science The University of Burdwan

We studied leaf litter fall, decomposition and nutrient release patterns of Shorea robusta and Tectona grandis by using a litter bag technique to better understand the release pattern of nutrients to soil from leaf litter. Annual litterfall varied from 13.40 ± 2.56 t ha-1 a-1 for S. robusta to 11.03 ± 3.72 t ha-1 a-1 for T. grandis and the decay constant （k） of decomposed leaf litter was distinctly higher for T. grandis （2.70 ± 0.50 a-1） compared to S. robusta （2.41 ±0.30 a-1）. Biomass loss was positively correlated with the initial litter C, WSC, C/n and ash content in S. robusta and n, P and K concentration for T. grandis. Biomass was negatively correlated with lignin and L/n ratio for S. robusta and L, WSC, L/n and C/n ratio for T. grandis （P 〈 0.01）. nutrient use efficiency （nUE） and nutrient accumulation index （nAI） of S. robusta was higher than for T. grandis. The retranslocation of bioelements from senescent leaves ranked as P 〉 n 〉 K. Annual n, P and K input to soil through litterfall differed significantly between the two species in the following order： n〉K^P. S. robusta was superior in terms of K and P return and T. grandis was superior in terms of n return. The two tree species showed a similar patterns of nutrient release （K 〉 P 〉 n） during decomposition of their leaf *** of n, K and P were the primary limiting nutrients returned to soil through litterfall with important roles in soil fertility and forest productivity.

关键词： Decay constant Lignin Litterfall nutrientreturn Decomposition nutrient use efficiency

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Structure, Photochromism and Liquid Crystal Properties of 1-Alkyl-2-(Arylazo)Imidazoles (Raai-C<sub>n</sub>H<sub>2n+1</sub>, n (Even) = 10 - 22)

引用

Advances in Materials Physics and Chemistry 2013年第2期3卷 133-145页

作者： Avijit nandi Chandana Sen Debashis Mallick Randhir K. Sinha chittaranjan Sinha Department of Chemistry Inorganic Chemistry Section Jadavpur University Kolkata India Department of Chemistry Mrinalini Datta Mahavidyapith Birati India

Photochromism is the reversible structural change of the molecules upon light irradiation having different spectral pattern before and after irradiation. Liquid crystal (LC) is a long-range orientational order of the molecules in between solid and isotropic liquid phases which share the properties of the crystal and liquid phases. 1-Alkyl-2-(ary-lazo)imidazoles, (Raai-CnH2n+1, R = H, Me and n = 10, 12, 14, 16, 18, 20, 22) exhibits photochromism and two of them (Haai-C18H37 and Haai-C22H45) show Liquid crystal (LC) properties. One of these compounds, Meaai-C16H33 is structurally characterized by single crystal X-ray diffraction study. The compounds upon irradiation with UV light show E-to-Z isomerisation. Quantum yields (φE→Z) of E-to-Z isomerisation vary with the molar mass of the compounds. The reverse transformation, Z-to-E, is recorded in thermal condition. The activation energy (Ea) of isomerisation is determined by the controlled temperature reaction. Liquid crystal property of the molecules is examined by polarizing optical microscopy (POM) and DSC. The carbon chain length n = 18 shows nematic (n)-isotropic (I) phase transition and an unknown Smectic (Sm) phase is observed with n = 22 on heating cycle.

关键词： Arylazoimidazoles Structure Photochromism Liquid Crystal nematic-Isotropic Phase Transition Smectic Phase

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

黑鲷Sparus macrocephalus(Basilewsky)、大黄鱼Pseudosciaena crocea(Richardson)亲鱼培育及性腺促熟试验

引用

现代渔业信息 2006年第9期21卷 31-33页

作者：蒋宏雷吴雄飞石钢德郑春静刘伟健尤锋许建和林永健吴锡科宁波市海洋与渔业研究院中国科学院海洋研究所山东省青岛市266071 宁波市象山港水产引种育种有限公司浙江省宁波市象山315700

在大黄鱼、黑鲷亲鱼培育阶段采用营养强化、控制雌雄比例和培育密度、改善培育环境等手段,可有效提高亲鱼培育存活率、尾产卵量及卵子受精率。其中大黄鱼平均培育成活率89.3%,尾产卵量8.7万粒,受精率92.5%;黑鲷平均培育成活率92.4%,尾... 详细信息

在大黄鱼、黑鲷亲鱼培育阶段采用营养强化、控制雌雄比例和培育密度、改善培育环境等手段,可有效提高亲鱼培育存活率、尾产卵量及卵子受精率。其中大黄鱼平均培育成活率89.3%,尾产卵量8.7万粒,受精率92.5%;黑鲷平均培育成活率92.4%,尾产卵量6.4万粒,受精率90.7%。

关键词：黑鲷大黄鱼培育性腺促熟

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：