Journal of KONES. Powertrain and Transport最新文献_第3页

The operation limitation of the two-stage reliquefaction cycle employed on board the ethylene carrier 乙烯载体采用两级再液化循环的操作限制

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217248

D. Nanowski

{"title":"The operation limitation of the two-stage reliquefaction cycle employed on board the ethylene carrier","authors":"D. Nanowski","doi":"10.5604/12314005.1217248","DOIUrl":"https://doi.org/10.5604/12314005.1217248","url":null,"abstract":"Ethylene, propane, commercial propane or HD-5 is cargoes very often carried by sea. In order to reduce the time of loading and later cooling down to required parameters of temperature and pressure in the cargo tanks two-stage reliquefaction cycle is used. For above-mentioned cargoes, two-stage cycle with liquid subcooling and interstage cooler is one of the most often utilized. In this paper operation of this cycle is discussed, based on parameters of the reciprocating cargo compressor and its cycle used on board the one of the biggest – 21 500 m3 – ethylene carrier in the world. It is explained how some vapour mixtures decrease cooling rate during reliquefaction of the cargo and some parameters of pressure and temperature of these mixtures are calculated with help of ProSimPlus – thermodynamic simulator. In this way, changes of the mixtures composition across reliquefaction plant are discussed. Increased pressure of the cargoes condensing as a way of solving of explained problem is analysed. Three stage – cycle of reliquefaction plant used for pure propane or ethylene is shown and some of its disadvantages are explained. Based on this discussion, three-stage cycle with liquid injection is proposed to fulfil operation requirements of the cargoes and improve their loading and cooling processes on board the ethylene carrier. Analysis of refrigeration capacity for both cycles is carried out.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123990248","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: 3

MODEL AIDED DESIGN OF TUNED RUBBER TVD 调谐橡胶TVD的模型辅助设计

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217250

J. Pankiewicz, B. Chilinski, Mariusz Wądołowski

{"title":"MODEL AIDED DESIGN OF TUNED RUBBER TVD","authors":"J. Pankiewicz, B. Chilinski, Mariusz Wądołowski","doi":"10.5604/12314005.1217250","DOIUrl":"https://doi.org/10.5604/12314005.1217250","url":null,"abstract":"The rotation of a crankshaft in piston combustion engines results from the acting of tangential forces on the crank, whose value changes with the change of the angle of shaft rotation. This results in torsional vibrations. These vibrations become especially dangerous when the frequency of changes of any components of tangential force is near or equal to the natural frequency of the shaft. It leads to resonant amplification of vibration amplitude and to exceeding the limit values of the angle of shaft torsion. Most often in such cases, various types of torsional vibration dampers are used. In automotive industry, these are usually rubber vibration dampers. Typical torsional vibration damper is an example of a resonant damper, which is designed for the most dangerous resonant frequency of the crankshaft related to the first form of vibration for which the torsional vibrations usually have the greatest amplitude. The design of such a damper involves choosing the inertia moment of the flywheel and the parameters of viscouselastic element. The article describes the model and the simulation research, which allowed for creating the procedure of designing rubber dampers of torsional vibrations. This procedure can help to reduce the costs of operation tests for the design of optimal torsional vibration damper.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122429734","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: 2

An influence of pusher propeller cover on its performance : a concept of wind tunnel investigation 推杆螺旋桨罩对其性能的影响:风洞研究的一个概念

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217263

P. Ruchała

{"title":"An influence of pusher propeller cover on its performance : a concept of wind tunnel investigation","authors":"P. Ruchała","doi":"10.5604/12314005.1217263","DOIUrl":"https://doi.org/10.5604/12314005.1217263","url":null,"abstract":"The paper describes a concept of wind tunnel investigation of the influence of the pusher propeller cover on its performance. The pusher propeller is one of the most popular types of the airplane propulsion, especially in light sport aircrafts and in the UAVs (Unmanned Aerial Vehicles). Its main advantages is that the engine with the pusher propeller does not affect the visibility from the cockpit and allows for placing an electronic equipment (for example, a camera) in the front part of the UAV’s fuselage. One of main disadvantages of pusher propeller is that it is partially covered by the fuselage and the wings of the airplane, thus the slipstream is distorted. This distortion may reduce the propeller thrust and efficiency. It may also cause vibrations of the propeller blades. This fact is well known, however it is difficult to find any quantitative information about reduction of the propeller performance. Taking it into account, it is worth to treat this subject and show a way to enhance the propeller performance. The wind tunnel tests, which concept has been described in the paper, will include measurements of total aerodynamic loads acting on the investigated object and on the propeller. Measurement of velocity distribution in the slipstream (by pressure measurement and by laser anemometry) will be included as well.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127269152","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: 2

Energy aspects of the SI engine load adjustment by early closing of inlet or exhaust valve 能源方面的SI发动机负荷调整通过提前关闭进气阀或排气阀

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217452

Z. Żmudka, S. Postrzednik, G. Przybyła

{"title":"Energy aspects of the SI engine load adjustment by early closing of inlet or exhaust valve","authors":"Z. Żmudka, S. Postrzednik, G. Przybyła","doi":"10.5604/12314005.1217452","DOIUrl":"https://doi.org/10.5604/12314005.1217452","url":null,"abstract":"The theoretical analysis of the SI engine load adjustment has been presented. The load especially in SI engine is highly dependent on the process of charge exchange. This process has significant impact on the effectiveness of an engine work because it is connected with the necessity of overcoming the flow resistance, then with the necessity of doing a work, so-called the charge exchange work. The flow resistance caused by throttling valve is especially high during part load operation. The open theoretical cycle has been assumed as a model of processes proceeding in the engine. Using fully variable inlet and exhaust valves timing the cycle can be realized e.g. according to two systems: system with early inlet valve closing (EIVC) and system with early exhaust valve closing (EEVC). Both systems have been analysed individually and comparatively with the open Seiliger-Sabathe cycle, which is theoretical cycle for the classical throttle governing of an engine load. Benefits resulting from application of the systems with independent inlet and exhaust valves control have been assessed on the basis of the selected parameters: a fuel dose, a cycle work, a charge exchange work and a cycle efficiency. The use of the analysed systems to governing of the SI engine load will enable to eliminate a throttling valve from inlet system and reduce the charge exchange work, especially within the range of part load operation. Decrease of the charge exchange work leads to increase of the internal and effective works, which results in increase of the effective efficiency of the spark ignition engine. Additionally, the EEVC enables realization of the internal EGR.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"07 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125498628","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

[u][/u]VERIFICATION OF LiFePO4 BATTERY MATHEMATIC MODEL [u][/u] LiFePO4电池数学模型的验证

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217256

F. Polak

引用次数: 1

Influence of selected service operations on the effectiveness of brake system operation 选定的服务操作对制动系统运行有效性的影响

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217301

K. Witaszek, Z. Stanik, J. Filipczyk

{"title":"Influence of selected service operations on the effectiveness of brake system operation","authors":"K. Witaszek, Z. Stanik, J. Filipczyk","doi":"10.5604/12314005.1217301","DOIUrl":"https://doi.org/10.5604/12314005.1217301","url":null,"abstract":"This paper attempts to clarify what impact has selected technical maintenance tasks on the effectiveness of the braking system with special emphasis on the initial break-in period of associated components. Were conducted studies involving measurements of braking forces on a rolling station and road tests Renault Thalia of car braking during which was recorded deceleration, speed, temperature of brake discs and the force of the pressure on the brake pedal. Braking process on the rolling station was assessed with a braking efficiency ratio as a criterion. However, results collected during road tests allowed studying for more accurate of running-in process of car barking system elements. This was due to taking into account the total vehicle braking force compared with the force applied to the brake pedal. The study was performed for the discs and brake pads exhibiting a different degree of wear, with particular emphasis on the running-in elements occurring immediately after replacing brake pads. In this case, there is a noticeable loss of performance brake system, which persists after initial running in mating faces of the pad and the brake disc. This phenomenon is known from workshop car service practice, but there is a need for sensitization of staff at the Prereaching elements of the service operations, because operation of a vehicle with a temporarily reduced efficiency of the braking system on a public road has the potential to cause threats to the safety of road users.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125959166","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

The impact of gas on the tribological properties of steel 16MnCr5 after surfacing with micro-jet cooling 微喷冷却堆焊后气体对16MnCr5钢摩擦学性能的影响

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217299

W. Tarasiuk, J. Piwnik, Aleksander Hornik, T. Wȩgrzyn, W. Majewski

{"title":"The impact of gas on the tribological properties of steel 16MnCr5 after surfacing with micro-jet cooling","authors":"W. Tarasiuk, J. Piwnik, Aleksander Hornik, T. Wȩgrzyn, W. Majewski","doi":"10.5604/12314005.1217299","DOIUrl":"https://doi.org/10.5604/12314005.1217299","url":null,"abstract":"This paper presents results of experimental research concerning the impact of an innovative method of micro-jet cooling on the padding weld performed with MAG welding. It enables to steer the parameters of weld cooling in a precise manner. Micro-jet cooling is a novel method patented in 2011. In addition, various elements, which may e.g. enhance hardness or alter tribological properties, can be entered into its top surface, depending on the applied cooling gas. The micro-jet welding method is the innovative method, which reduces the intensity of abrasive wear. The method can be used as a basic finishing or a regeneration method. An innovative technology for micro-jet is used to cool the weld surface that is, using a micro-welding jet cooling. This allows accurate and complete control of the surface structure of the deposit. The material under study was steel 16MnCr5, which was subject to the welding process with different gases of micro-jet cooling. Nitrogen and air was used as a cooling gas. The main parameter of weld assessment was wear intensity. The tests were conducted in a tribological pin-on-disc type position. T-11 pin-ondisc tester allows for indicating basic wear parameters (wear intensity, wear coefficient, wear force). Based on results of experiment the application of nitrogen in micro-jet cooling of the padding weld in the welding process of steel 16MnCr5 beneficially affects resistance to abrasive wear.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123402172","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

Dry friction damper for supercritical drive shaft 超临界传动轴用干摩擦阻尼器

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217255

W. Perkowski

{"title":"Dry friction damper for supercritical drive shaft","authors":"W. Perkowski","doi":"10.5604/12314005.1217255","DOIUrl":"https://doi.org/10.5604/12314005.1217255","url":null,"abstract":"In this article the construction and mathematical model of a dry friction damper with radial gap, designed for dumping flexural vibrations of a supercritical propulsion shaft (developed previously during design works made in Institute of Aviation on propulsion system for an ultralight IS-2 helicopter), while passing through the resonance is presented. Some results of mathematical and numerical analyses of such a system (supercritical shaft + damper) behaviour are also presented – among other things, very distinctive behaviour of the shaft, while passing through resonance, is shown. From a theoretical point of view, it is interesting that certain range of damper parameters, obtained in the course of numerical analysis, lead to chaotic vibrations of the system (they were also observed in practice). From a practical point of view, it will be interesting that the article shows a way how to create a dimensionless (and therefore general) parameters of the system: supercritical shaft and friction damper and also simple engineering methodology for selection of suitable (for the correct operation of the shaft) damper parameters depending on the parameters of the shaft, developed during series of analyses. The practical aspect of the problem seems to be particularly important, as the supercritical propulsion shaft equipped with a friction damper can be very structurally simple, light and inexpensive, and still it is not widely used, probably because of certain doubts aroused in the constructors by the term: “resonant vibrations”.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121615369","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: 3

The impact of operating parameters of tractor's engine on exhaust emissions 拖拉机发动机运行参数对废气排放的影响

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217245

J. Merkisz, J. Pielecha, R. Jasiński

{"title":"The impact of operating parameters of tractor's engine on exhaust emissions","authors":"J. Merkisz, J. Pielecha, R. Jasiński","doi":"10.5604/12314005.1217245","DOIUrl":"https://doi.org/10.5604/12314005.1217245","url":null,"abstract":"At the beginning of the twenty-first century, one of the major challenges of humanity was to reduce the negative effects of civilization development. Besides the engines used in road vehicles there is a large group of engines for nonroad applications. This group includes motor propelled vehicles not used on the road NRMM (Non-Road Mobile Machinery). Engines of these vehicles, among all of the non-road applications, are characterized by very specific working conditions that do not allow them to be qualified for propulsion engines. The main problem with these vehicles is the particulate matter and nitrogen oxides emission. The paper presents an analysis of the operating parameters of an engine and exhaust emissions of a tractor operating on a chassis dynamometer. Studies of the tractor involved measurements of engine operating parameters and the concentration of harmful substances in the exhaust gases. Information about the parameters of the engine and the intensity of emissions were obtained during the dynamometer test. The study included a comparative analysis of the operating parameters of the engine obtained from the diagnostic system and direct measurements on a chassis dynamometer and a correction of the torque obtained from the vehicle computer system was made. As a result, values of specific emission during engine tests under varying values of load were determined.","PeriodicalId":165563,"journal":{"name":"Journal of KONES. Powertrain and Transport","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131966646","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

Critical assessment of ERTMS systems reliability based on the example of the GSM-R system 基于GSM-R系统实例的ERTMS系统可靠性关键评估

Journal of KONES. Powertrain and Transport Pub Date : 2016-09-06 DOI: 10.5604/12314005.1217282

M. Siergiejczyk

引用次数: 1