Pub Date : 1900-01-01DOI: 10.5545/SV-JME.2021.7172
Pei Ning, Ji Zhao, Shijun Ji, Jingjin Li, D. Handa
Single-point diamond turning (SPDT) assisted with slow tool servo (STS) is the most commonly utilized technique in the fabrication of optical modules. However, the tool path significantly affects the quality of the machined surface. In order to realize the determined machining accuracy effectively, a tool path generation (TPG) method based on machining accuracy active control (MAAC) is presented. The relationship between tool path and machining error is studied. Corner radius compensation (CRC) and the calculation of chord error and residual error are detailed. Finally, the effectiveness of the proposed approach is verified through a machining error simulation and a cutting experiment of a complex sinusoidal mesh surface fabrication.
{"title":"Ultra-precision single-point diamond turning of a complex sinusoidal mesh surface using machining accuracy active control","authors":"Pei Ning, Ji Zhao, Shijun Ji, Jingjin Li, D. Handa","doi":"10.5545/SV-JME.2021.7172","DOIUrl":"https://doi.org/10.5545/SV-JME.2021.7172","url":null,"abstract":"Single-point diamond turning (SPDT) assisted with slow tool servo (STS) is the most commonly utilized technique in the fabrication of optical modules. However, the tool path significantly affects the quality of the machined surface. In order to realize the determined machining accuracy effectively, a tool path generation (TPG) method based on machining accuracy active control (MAAC) is presented. The relationship between tool path and machining error is studied. Corner radius compensation (CRC) and the calculation of chord error and residual error are detailed. Finally, the effectiveness of the proposed approach is verified through a machining error simulation and a cutting experiment of a complex sinusoidal mesh surface fabrication.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125597142","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}
Pub Date : 1900-01-01DOI: 10.5545/SV-JME.2021.7139
M. Chernets, M. Opielak, A. Kornienko, O. Radko
A computational method is presented as a method for solving a plane contact problem of the theory of elasticity to determine the contact strength and tribological durability of sliding bearings. The effect of load and radial clearance on the initial contact pressures and their reduction due to wear is studied. The durability of the bearing is estimated. Qualitative and quantitative regularities of changes in contact parameters and durability from the factors under study are established. In particular, it has been shown that both contact angles and maximum contact pressures are approximately linearly dependent on the load, and the durability decreases nonlinearly with increasing load.
{"title":"Predictive estimation of sliding bearing load-carrying capacity and tribological durability","authors":"M. Chernets, M. Opielak, A. Kornienko, O. Radko","doi":"10.5545/SV-JME.2021.7139","DOIUrl":"https://doi.org/10.5545/SV-JME.2021.7139","url":null,"abstract":"A computational method is presented as a method for solving a plane contact problem of the theory of elasticity to determine the contact strength and tribological durability of sliding bearings. The effect of load and radial clearance on the initial contact pressures and their reduction due to wear is studied. The durability of the bearing is estimated. Qualitative and quantitative regularities of changes in contact parameters and durability from the factors under study are established. In particular, it has been shown that both contact angles and maximum contact pressures are approximately linearly dependent on the load, and the durability decreases nonlinearly with increasing load.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122681159","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}
Pub Date : 1900-01-01DOI: 10.1615/ICHMT.2004.INTTHERMSCISEMIN.820
D. W. Zhou
The effect of bubble nucleation on boiling heat transfer enhancement has been investigated experimentally. Results show whether boiling heat transfer is enhanced or not depends directly on effective activation of vapor embryos on the heat transfer surface to initiate boiling. The mechanism of boiling heat transfer enhancement is analyzed and the influence factors of incipient boiling superheat are summarized. In light of bubble nucleation effect, the possible techniques for enhancing boiling beat transfer and eliminating boiling hysteresis are proposed and further developed as a principle to guide the research of boiling heat transfer enhancement.
{"title":"A novel concept for boiling heat transfer enhancement","authors":"D. W. Zhou","doi":"10.1615/ICHMT.2004.INTTHERMSCISEMIN.820","DOIUrl":"https://doi.org/10.1615/ICHMT.2004.INTTHERMSCISEMIN.820","url":null,"abstract":"The effect of bubble nucleation on boiling heat transfer enhancement has been investigated experimentally. Results show whether boiling heat transfer is enhanced or not depends directly on effective activation of vapor embryos on the heat transfer surface to initiate boiling. The mechanism of boiling heat transfer enhancement is analyzed and the influence factors of incipient boiling superheat are summarized. In light of bubble nucleation effect, the possible techniques for enhancing boiling beat transfer and eliminating boiling hysteresis are proposed and further developed as a principle to guide the research of boiling heat transfer enhancement.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124424410","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}
Pub Date : 1900-01-01DOI: 10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.690
A. Levy, M. Jelínek, I. Borde
Current developments in absorption technology include the research for new working pairs and new advance cycles that would facilitate increased efficiency of absorption units and extend applicability to different temperature ranges. Two refrigerants tetrafluoroethane (R134a) and pentafluoroethane (R125) that are alternatives to chlorofluorocarbons, in combination with absorbent dimethylether teraethylene glycol (DMETEG) were evaluated for possible utilization in absorption machines powered by low temperature heat sources. A computerized simulation program was used to compare the different refrigerant-absorbent pairs. The program was based on an advance single-stage cycle containing a jet ejector. The absorption cycle was represented in terms of heat and mass balance for each component and the calculations were based on the thermophysical properties of the refrigerant-absorbent pairs measured and evaluated in our laboratory. The aim of the cycle analysis was to evaluate the highest coefficient of performance (COP) and the lowest circulation ratio (f), which can be obtained for different generator temperatures under a constant evaporating and cooling water temperatures. The effects of changes in the evaporator and the cooling water temperatures on the COP and the circulation ratio, f, were also examined at the generator temperature at maximum COP.
{"title":"Single stage absorption system based on refrigerants R125 and R134A with DMETEG","authors":"A. Levy, M. Jelínek, I. Borde","doi":"10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.690","DOIUrl":"https://doi.org/10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.690","url":null,"abstract":"Current developments in absorption technology include the research for new working pairs and new advance cycles that would facilitate increased efficiency of absorption units and extend applicability to different temperature ranges. Two refrigerants tetrafluoroethane (R134a) and pentafluoroethane (R125) that are alternatives to chlorofluorocarbons, in combination with absorbent dimethylether teraethylene glycol (DMETEG) were evaluated for possible utilization in absorption machines powered by low temperature heat sources. A computerized simulation program was used to compare the different refrigerant-absorbent pairs. The program was based on an advance single-stage cycle containing a jet ejector. The absorption cycle was represented in terms of heat and mass balance for each component and the calculations were based on the thermophysical properties of the refrigerant-absorbent pairs measured and evaluated in our laboratory. The aim of the cycle analysis was to evaluate the highest coefficient of performance (COP) and the lowest circulation ratio (f), which can be obtained for different generator temperatures under a constant evaporating and cooling water temperatures. The effects of changes in the evaporator and the cooling water temperatures on the COP and the circulation ratio, f, were also examined at the generator temperature at maximum COP.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130172369","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}
Pub Date : 1900-01-01DOI: 10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.300
G. Hadjisophocleous, M. An, V. Costa, A. Sousa
The modeling of fire suppression using fine watersprays is described within the context of an engineering computer model. A Lagrangian formulation was selected for the liquid droplet phase, while the gas phase uses an Eulerian formulation based on the RANS equations with a two-equation turbulence model. The fire is assumed to be a turbulent diffusion flame with its behavior dependent upon the supply of hydrocarbon fuel and the air accessing the fire. A feedback mechanism is also implemented, which dictates the rate of fuel evaporation. The flammability limits of the fuel vapor are taken into account, and the concentrations of fuel vapor, air, combustion products and steam evaporated from the droplets in the gas mixture are calculated by solving the equations for the mixture mass fractions. The droplets/gas phase interaction is described through source terms in the gas-phase equations. The time-dependent equations governing the gas phase are solved in primitive variable form by using a segregated technique. The ordinary differential equations for droplet motion, heating and evaporation are solved by an explicit forward time integration, which starts at the injection point. The droplet time step is determined by considering the turbulence dispersion of the droplets. The predictions produced by the model for the three different cases examined are physically realistic, notwithstanding the uncertainties associated with the experimental data and the input parameters.
{"title":"Fire suppression using water mists: A numerical model","authors":"G. Hadjisophocleous, M. An, V. Costa, A. Sousa","doi":"10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.300","DOIUrl":"https://doi.org/10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.300","url":null,"abstract":"The modeling of fire suppression using fine watersprays is described within the context of an engineering computer model. A Lagrangian formulation was selected for the liquid droplet phase, while the gas phase uses an Eulerian formulation based on the RANS equations with a two-equation turbulence model. The fire is assumed to be a turbulent diffusion flame with its behavior dependent upon the supply of hydrocarbon fuel and the air accessing the fire. A feedback mechanism is also implemented, which dictates the rate of fuel evaporation. The flammability limits of the fuel vapor are taken into account, and the concentrations of fuel vapor, air, combustion products and steam evaporated from the droplets in the gas mixture are calculated by solving the equations for the mixture mass fractions. The droplets/gas phase interaction is described through source terms in the gas-phase equations. The time-dependent equations governing the gas phase are solved in primitive variable form by using a segregated technique. The ordinary differential equations for droplet motion, heating and evaporation are solved by an explicit forward time integration, which starts at the injection point. The droplet time step is determined by considering the turbulence dispersion of the droplets. The predictions produced by the model for the three different cases examined are physically realistic, notwithstanding the uncertainties associated with the experimental data and the input parameters.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128764013","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}
Pub Date : 1900-01-01DOI: 10.5545/SV-JME.2021.7216
Yangpeng Chen, H. Chao, Lyu Yueling
In this paper, a novel line gear mechanism is proposed; it is called the variable shaft angle line gear mechanism (VSALGM). VSALGM has two rotational degrees of freedom, one is the rotation of the two gears with a constant transmission ratio, and the other is the relative swing of the two gears shafts. First, a novel contact model of VSALGM composed of one driven contact curve and one driving line teeth working surface (DLTWS) was proposed. With the concept, the basic design equations for VSALGM were derived on the basis of the space curve meshing theory of line gear. Moreover, the design criterion of pressure angle for VSALGM was analysed and proposed on the basis of the contact model. A basic design method for VSALGM was thus developed. A design example was given, and prototypes were manufactured using three-dimensional (3D) printing. Kinematic experiments and gear contact spot testing were carried out on a self-made kinematic test rig by the prototypes. The results show that the VSALGM designed in this paper can achieve a continuous, smooth and stable meshing transmission while the shaft angle is continuously changed within its setting range.
{"title":"Basic theory and design method of variable shaft angle line gear mechanism","authors":"Yangpeng Chen, H. Chao, Lyu Yueling","doi":"10.5545/SV-JME.2021.7216","DOIUrl":"https://doi.org/10.5545/SV-JME.2021.7216","url":null,"abstract":"In this paper, a novel line gear mechanism is proposed; it is called the variable shaft angle line gear mechanism (VSALGM). VSALGM has two rotational degrees of freedom, one is the rotation of the two gears with a constant transmission ratio, and the other is the relative swing of the two gears shafts. First, a novel contact model of VSALGM composed of one driven contact curve and one driving line teeth working surface (DLTWS) was proposed. With the concept, the basic design equations for VSALGM were derived on the basis of the space curve meshing theory of line gear. Moreover, the design criterion of pressure angle for VSALGM was analysed and proposed on the basis of the contact model. A basic design method for VSALGM was thus developed. A design example was given, and prototypes were manufactured using three-dimensional (3D) printing. Kinematic experiments and gear contact spot testing were carried out on a self-made kinematic test rig by the prototypes. The results show that the VSALGM designed in this paper can achieve a continuous, smooth and stable meshing transmission while the shaft angle is continuously changed within its setting range.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123125108","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}
Pub Date : 1900-01-01DOI: 10.1615/ICHMT.2004.INTTHERMSCISEMIN.910
J. Bellettre, E. Ollivier, M. Tazerout
The present paper studies the possibility to develop a new method of knock detection in a gas SI engine. This method is based on the increase in'the wall heat flux when knock occurs. It also must be simple enough to be used by industry. In order to achieve this goal, a metallic Phase Change Material is put within the wall cylinder. The melting of the PCM means that knock has occurred and is persistent. The melting of such a phase change material would be easy to detect using industrial measurement tools. In this paper, numerical simulations of unsteady heat transfer across the cylinder wall are presented. Unsteady heat transfer from the hot gas to the wall chamber is simulated by a self-developed program. This program allows fixing instantaneous local heat flux values deduced from the literature in case of both normal and knocking combustion. Heat transfer across the cylinder wall is solved by the finite volume technique. Grid is validated by comparison with analytical results. Melting is treated by the Voller and Prakash model and Sodium is chosen as PCM. Among all the results, we can notice that an increase in the knock intensity changes the shape of the isothermal curves around and inside the PCM. This leads to an increase in the melting velocity with a higher rate than the increase in the heat flux.
{"title":"The use of a phase change material within a cylinder wall in order to detect knock in a gas SI engine","authors":"J. Bellettre, E. Ollivier, M. Tazerout","doi":"10.1615/ICHMT.2004.INTTHERMSCISEMIN.910","DOIUrl":"https://doi.org/10.1615/ICHMT.2004.INTTHERMSCISEMIN.910","url":null,"abstract":"The present paper studies the possibility to develop a new method of knock detection in a gas SI engine. This method is based on the increase in'the wall heat flux when knock occurs. It also must be simple enough to be used by industry. In order to achieve this goal, a metallic Phase Change Material is put within the wall cylinder. The melting of the PCM means that knock has occurred and is persistent. The melting of such a phase change material would be easy to detect using industrial measurement tools. In this paper, numerical simulations of unsteady heat transfer across the cylinder wall are presented. Unsteady heat transfer from the hot gas to the wall chamber is simulated by a self-developed program. This program allows fixing instantaneous local heat flux values deduced from the literature in case of both normal and knocking combustion. Heat transfer across the cylinder wall is solved by the finite volume technique. Grid is validated by comparison with analytical results. Melting is treated by the Voller and Prakash model and Sodium is chosen as PCM. Among all the results, we can notice that an increase in the knock intensity changes the shape of the isothermal curves around and inside the PCM. This leads to an increase in the melting velocity with a higher rate than the increase in the heat flux.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131406107","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}
Pub Date : 1900-01-01DOI: 10.1615/ICHMT.2000.THERSIEPROCVOL2.30
P. Novak
The fact that the concentration of carbon dioxide is increasing steadily forces us to reconsider the ways in which we exploit fossil fuels. Current carbon dioxide emissions should be reduced by factor two. In case we don't take any actions to reduce emissions now, they will double in the future, due to the increase of energy use from the growing Earth's population. Therefore, we will have to deal with an emission reduction factor of four, merely to stabilize the Earth's climate. It is possible to reduce primary energy needs for 50 - 75% by introducing sustainable energy system and by increasing efficiency at energy conversion and use. Heat exchangers will play an important role in this respect. In this paper some ideas are presented about how to attain the desired reduction of energy use while at the same time preserving the current level of living comfort and transportation using high efficiency heat exchangers.
{"title":"Role of the heat-exchangers in the factor 4 energy policy","authors":"P. Novak","doi":"10.1615/ICHMT.2000.THERSIEPROCVOL2.30","DOIUrl":"https://doi.org/10.1615/ICHMT.2000.THERSIEPROCVOL2.30","url":null,"abstract":"The fact that the concentration of carbon dioxide is increasing steadily forces us to reconsider the ways in which we exploit fossil fuels. Current carbon dioxide emissions should be reduced by factor two. In case we don't take any actions to reduce emissions now, they will double in the future, due to the increase of energy use from the growing Earth's population. Therefore, we will have to deal with an emission reduction factor of four, merely to stabilize the Earth's climate. It is possible to reduce primary energy needs for 50 - 75% by introducing sustainable energy system and by increasing efficiency at energy conversion and use. Heat exchangers will play an important role in this respect. In this paper some ideas are presented about how to attain the desired reduction of energy use while at the same time preserving the current level of living comfort and transportation using high efficiency heat exchangers.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122718303","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}
Pub Date : 1900-01-01DOI: 10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.130
I. Assovskiy
The purpose of this paper is to analyze thermal regime of a laser-pulse interaction with a substance reacting in bulk and on the surface. Emphasis is on the critical phenomena in non-resonant interaction of substance with laser beam, and how they depend on thermo-chemical and optical characteristics of system. It is shown that irradiation of exothermically reacting substance can induce its ignition, if the laser-beam diameter exceeds a critical one. This critical diameter depends on the pulse intensity and duration, as on the thermo-chemical characteristics of system. The cases of short-pulse and quasi-steady irradiation are considered in details. A role of soot particles or other absorbing micro-inclusions in the interaction is investigated. In certain field of the system parameters such micro-inclusions cause local heat explosion, due to exothermic reaction in environment. In the case of quasi-steady irradiation the explosion is induced if the particle diameter exceeds a critical one. This critical diameter depends on the initial temperature, reaction rate constants, as on radiation intensity. It is directly proportional to the characteristic space-scale of reaction in the system. The product of the particle critical diameter and the radiation intensity is approximately constant. In the case of short-pulse irradiation the highest temperature disturbance in the substance is caused by particles having certain medium diameter. This critical diameter increases with pulse duration and with heat-conductivity of the substance. The main results of consideration are illustrated by instances with reacting gas, condensed fuels, and explosives. The results application to typical problems of laser based diagnostics are also demonstrated.
{"title":"Heat transfer in laser pulse interaction with reactive substances","authors":"I. Assovskiy","doi":"10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.130","DOIUrl":"https://doi.org/10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.130","url":null,"abstract":"The purpose of this paper is to analyze thermal regime of a laser-pulse interaction with a substance reacting in bulk and on the surface. Emphasis is on the critical phenomena in non-resonant interaction of substance with laser beam, and how they depend on thermo-chemical and optical characteristics of system. It is shown that irradiation of exothermically reacting substance can induce its ignition, if the laser-beam diameter exceeds a critical one. This critical diameter depends on the pulse intensity and duration, as on the thermo-chemical characteristics of system. The cases of short-pulse and quasi-steady irradiation are considered in details. A role of soot particles or other absorbing micro-inclusions in the interaction is investigated. In certain field of the system parameters such micro-inclusions cause local heat explosion, due to exothermic reaction in environment. In the case of quasi-steady irradiation the explosion is induced if the particle diameter exceeds a critical one. This critical diameter depends on the initial temperature, reaction rate constants, as on radiation intensity. It is directly proportional to the characteristic space-scale of reaction in the system. The product of the particle critical diameter and the radiation intensity is approximately constant. In the case of short-pulse irradiation the highest temperature disturbance in the substance is caused by particles having certain medium diameter. This critical diameter increases with pulse duration and with heat-conductivity of the substance. The main results of consideration are illustrated by instances with reacting gas, condensed fuels, and explosives. The results application to typical problems of laser based diagnostics are also demonstrated.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121729243","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}
Pub Date : 1900-01-01DOI: 10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.780
M. Pavlovic
Glass containers are 100% recyclable, and can be repeatedly recycled. Collection and use of used glass containers in Yugoslavia are still in the initial phase. The present paper is an identification of quantities of usedglass containers per inhabitant, based on a research experiment performed over a long period. The energy consumption data within the system of municipal collection of waste glass, its transportation to the special plant for crushing and preparing into batches, next phase is the transportation of the materials to the very glass container factory. The energy research includes the analysis of energy consumption in the production process per unit weight of the newly manufactured glass containers. Within the manufacturing process various percentages of participation of waste glass are applied, as compared to participation of natural (primary) raw materials - indicating the whole range: from 0 to 100 per cent.
{"title":"Energy savings by recycling","authors":"M. Pavlovic","doi":"10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.780","DOIUrl":"https://doi.org/10.1615/ICHMT.2000.THERSIEPROCVOL2THERSIEPROCVOL1.780","url":null,"abstract":"Glass containers are 100% recyclable, and can be repeatedly recycled. Collection and use of used glass containers in Yugoslavia are still in the initial phase. The present paper is an identification of quantities of usedglass containers per inhabitant, based on a research experiment performed over a long period. The energy consumption data within the system of municipal collection of waste glass, its transportation to the special plant for crushing and preparing into batches, next phase is the transportation of the materials to the very glass container factory. The energy research includes the analysis of energy consumption in the production process per unit weight of the newly manufactured glass containers. Within the manufacturing process various percentages of participation of waste glass are applied, as compared to participation of natural (primary) raw materials - indicating the whole range: from 0 to 100 per cent.","PeriodicalId":237575,"journal":{"name":"Strojniški vestnik","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130716272","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}
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