International Journal of Thermal Technologies最新文献

Theoretical prediction of performance of Single and Double pass solar air heaters with artificial roughened absorber plates 人工粗化吸收板单道和双道太阳能空气加热器性能的理论预测

International Journal of Thermal Technologies Pub Date : 2018-11-17 DOI: 10.14741/IJTT/V.8.4.2

S. Stanley, K. Reddy, M. B. Q. Mary

引用次数: 0

Investigation on Performance and Emission Characteristics of Low Heat Rejection Diesel Engine using Alternate Fuels 替代燃料低排热柴油机性能及排放特性研究

International Journal of Thermal Technologies Pub Date : 2018-11-17 DOI: 10.14741/IJTT/V.8.2.2

B. Kumar, K. Reddy

{"title":"Investigation on Performance and Emission Characteristics of Low Heat Rejection Diesel Engine using Alternate Fuels","authors":"B. Kumar, K. Reddy","doi":"10.14741/IJTT/V.8.2.2","DOIUrl":"https://doi.org/10.14741/IJTT/V.8.2.2","url":null,"abstract":"Petroleum based fuels play a vital role in rapid depletion of conventional energy sources along with increasing demand and also major contributors of air pollutants. Major contributors of today’s energy demand in India is being met with\u0000 fossil fuels hence it is high time that alternative fuels for engines should be derived from indigenous sources .The enormous growth of world population, increased technical development and standard of living in industrial nations has led to this\u0000 intricate situation in the field of energy, supply and demand. As India is agricultural country there is wide scope for the production of vegetable oils (both edible and non edible oils) from different oil seeds. The present work is focused only on\u0000 non-edible oils as fuels for engines, as the edible oils are in great demand and far too expensive. All neat oils are to be collected and converted into their respective methyl esters through transesterification process. Thermal barrier coatings are\u0000 becoming increasingly important in providing thermal insulation for heat engine components. Thermal insulation reduces in-cylinder heat transfer from the engine combustion chamber as well as reducing component structural temperatures. Likewise,\u0000 Bio-diesel too has a potential as a promising alternative fuel to their diesel counterparts while being renewable, sustainable, and environmental friendly. In this work, the comparative effect of performance and emission characteristics of a standard\u0000 compression ignition engine (STD) with Magnesium stabilized Zirconia (MSZ) coated (LHR) engines are investigated. Fuel-related properties have to be calculated and analyzed with those of conventional diesel engine. The effect of use of bio-diesel\u0000 fuel on engine power, fuel consumption and thermal efficiency has to be calculated and analysed with that of conventional diesel engine.","PeriodicalId":170784,"journal":{"name":"International Journal of Thermal Technologies","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124790117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Evaluation of Pollutants Emissions in a Homogeneous Methane/Air Micro Flame 均匀甲烷/空气微火焰中污染物排放的数值计算

International Journal of Thermal Technologies Pub Date : 2018-11-17 DOI: 10.14741/ijtt/v.8.2.4

O. S. Mayi, F. Lontsi, M. O. Akong, J. Agbebavi

{"title":"Numerical Evaluation of Pollutants Emissions in a Homogeneous Methane/Air Micro Flame","authors":"O. S. Mayi, F. Lontsi, M. O. Akong, J. Agbebavi","doi":"10.14741/ijtt/v.8.2.4","DOIUrl":"https://doi.org/10.14741/ijtt/v.8.2.4","url":null,"abstract":"Exhausting pollutant gas in a plug flow micro reactor are identified, described and predicted in this paper. For this, a premixed methane/air micro flame was simulated by a simplified chemical kinetics mechanism with four equations of Jones\u0000 and Lindstedt. In addition to the Jones and Lindstedt model, one chemical kinetic mechanism with three equations describing the formation of thermal NO was integrated in Comsol 4.2a code, all that equations describing the production process and\u0000 disappearance of the major chemical species. Simulations in stoichiometric and lean conditions with equivalent ratio ф equal to 0.9 and 0.7 show that the simulations with Jones and Lindstedt model provide a stable flame with the temperatures of the\u0000 same order as that obtained with a detailed chemical kinetic mechanism as reported in the literature. Production of carbon dioxide (CO2) varies with the richness of the mixture. It is high with ф = 1 and in the order of 250 ppm, this value remains\u0000 smaller than the required threshold for breathable air. Carbon monoxide (CO) is not found in the products of combustion due to the high temperatures at the outlet of the microreactor in the three cases","PeriodicalId":170784,"journal":{"name":"International Journal of Thermal Technologies","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114465390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on the Tensile Strength of the Friction Stir Welded similar joint of Al/Al alloy using high thermal diffusivity backing plate material. 采用高热扩散率垫板材料的Al/Al合金搅拌摩擦焊接相似接头抗拉强度研究。

International Journal of Thermal Technologies Pub Date : 2018-11-17 DOI: 10.14741/IJTT/V.8.2.1

Akshansh Mishra, Abhishek Sharma, Hardik Kapoor, Jaspreet Singh, K. Kumar

引用次数: 1

Combustion and Emission Characteristics of Hydrous Ethanol–Gasoline Blends with Co-solvents in Spark-ignited Single cylinder Engine 含助溶剂的含水乙醇-汽油混合燃料在火花点火单缸发动机中的燃烧与排放特性

International Journal of Thermal Technologies Pub Date : 2018-11-17 DOI: 10.14741/ijtt/v.8.4.1

A. Sathyanarayana, G. Hebbar, T. Sreenivasa, K. M. Harinikuma

{"title":"Combustion and Emission Characteristics of Hydrous Ethanol–Gasoline Blends with Co-solvents in Spark-ignited Single cylinder Engine","authors":"A. Sathyanarayana, G. Hebbar, T. Sreenivasa, K. M. Harinikuma","doi":"10.14741/ijtt/v.8.4.1","DOIUrl":"https://doi.org/10.14741/ijtt/v.8.4.1","url":null,"abstract":"In Brazil, hydrous ethanol is blended with gasoline and is successfully implemented in flexi fuel engines and it has the potential to directly compete with fossil fuels. However, the Ethanol Blending Program of India has not been successful\u0000 due to non-availability of sugarcane molasses and could not achieve its 5% blending target based on the literature review study. Hydrous ethanol with co-solvent is proposed in this work as a promising blending oxidant instead of energy-intensive\u0000 anhydrous ethanol in gasoline. This research work also delves into the challenges of using hydrous ethanol in gasoline blended fuel such as water tolerance, fuel properties, and fuel selection. The selected fuel sample 2EW30TBA10, which contains 30%\u0000 hydrous ethanol and 10% TBA (t-butyl alcohol), and gasoline was selected based on water tolerance of the blended sample and stability. The combustion and emission characteristics of the selected fuel sample 2EW30TBA10 are studied in 4-stroke, single\u0000 cylinder, water cooled engine, and the performances are compared to base fuel (E0) and reference fuel (E10). The significant contributions of the present research work are the development of combustion model using MATLAB using: Apparent heat release\u0000 model (Model1) and Combustion pressure method (Model-2) and the results are validated using modified Wiebe function. There was an increase in brake thermal efficiency by 5% compared to base fuel (E0) and the specific fuel consumption (sfc) for\u0000 2EW30TBA10 fuel sample is 290 g/KWh as compared to E10, which is 300 g/KWh and for Petrol (E0), sfc is 360 g/KWh. There was a reduction in CO and HC emission compared to base fuel (E0) and an increase in NOx emissions. The cyclic variations of\u0000 experimental results are validated using a non-linear regression model.","PeriodicalId":170784,"journal":{"name":"International Journal of Thermal Technologies","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115325209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling and transient simulation of a regenerative open Joule cycle reciprocating Ericsson engine for micro-CHP applications 微型热电联产应用的可再生开焦耳循环往复式爱立信发动机的建模和瞬态仿真

International Journal of Thermal Technologies Pub Date : 2018-11-17 DOI: 10.14741/ijtt/v.8.2.3

F. Lontsi, O. Hamandjoda, P. Stouffs, J. Nganhou

{"title":"Modelling and transient simulation of a regenerative open Joule cycle reciprocating Ericsson engine for micro-CHP applications","authors":"F. Lontsi, O. Hamandjoda, P. Stouffs, J. Nganhou","doi":"10.14741/ijtt/v.8.2.3","DOIUrl":"https://doi.org/10.14741/ijtt/v.8.2.3","url":null,"abstract":"The open Joule cycle reciprocating Ericsson engine shows promising results as regards small-scale cogeneration applications using renewable energies such as biomass or solar energy. Integrating a regenerative heat exchanger into a simple open\u0000 Joule cycle helps to improve the engine performance thanks to the recovery of the waste heat of hot gases downstream the expander. A dynamic model of a small open Joule cycle Ericsson engine with a shell-andtube counter-flow regenerative heat\u0000 exchanger is developed and simulated in order to study the operation stability, the system behaviour especially during transient phases, and the control strategies. Compared to the engine configuration without regeneration, simulation results predict\u0000 a slower hot start-up transient followed by a stable operation of the engine with 21% increase of the engine thermal efficiency, 14.3% increase of the engine power output and a 529.5K exhaust air flow suitable for cogeneration purposes. Subjected to\u0000 a selected perturbation (10kPa compressor inlet pressure drop) the engine reacts well and the operation is stabilized after a much longer transient phase. Valve settings are also addressed to maintain the system set pressure.","PeriodicalId":170784,"journal":{"name":"International Journal of Thermal Technologies","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126022072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0