我国船用液化石油气(LPG)动力装置的现状及发展

分析了船用LPG动力装置的研制开发与应用背景、目前的技术开发状态及实船使用情况;指出其发展方向;并就船用LPG动力装置产业化提出建议。     

船用LPG发动机闭环控制性能试验研究

介绍了LPG动力装置在船上用作推进主机和发电机组辅机这两种主要用途时使用λ闭环控制结合三元催化后处理对其性能的影响,以及所进行的试验验证。为LPG动力装置的船用化作了很有意义的探索。     

北京环保游船LPG动力装置的研制

本文叙述关于北京环保旅游船LPG发动机动力装置的开发研制过程试验结果表明本动力装置可满足船用动力系统及安全保护的要求其怠速排放也较好地达到了国内排放标准的要求.     

ZS1100M气体发动机的研制

介绍了将原ZS1100M型柴油机开发改造为船用LPG发动机的开发思路,针对LPG发动机特点,改进主要零部件的设计,使LPG发动机性能达到了设计要求。     

船用柴油机节能减排技术研究及未来发展趋势展望

我们介绍了船用柴油机在节能减排技术领域开展的技术研究,并重点对其未来发展趋势进行了展望。在现在及未来的较长一段时间内,柴油机依然会是民用商船领域的主流动力装置。常用于水面舰艇及高性能船舶的燃气轮机动力装置,具有较好发展前景的风能、太阳能及燃料电池等新能源动力装置目前尚无法取代船用柴油机的统治性地位。而在当前的能源及环境局势影响下,针对船用柴油机开展的节能减排研究则显得尤为重要。     

船用柴油机动力装置的抗冲击技术研究

在对国内外船用柴油机动力装置抗冲击技术论述的基础上,分析了柴油机动力装置的抗冲击评估和试验方法,提出了柴油机动力装置抗冲击设计思路和方法,研究成果可应用于船舶设备的抗冲击评估和设计中。     

基于双CAN总线的船用动力装置监测系统设计

通过对船舶机舱自动化装置特点的深入分析,提出了应用CAN总线技术设计船用动力装置监测系统的要点和解决方案,探讨了依托CAN总线开发船舶机舱监控系统的经济性和可行性。     

船用蒸汽动力装置控制监测系统的研制

蒸汽动力装置系统复杂,设备多,需要控制的参数多,大部分被控对象的特性无法用简单的数学模型来表示,装置运行时参数间相互关联,耦合关系复杂,许多被控参数用简单的单回路控制无法满足使用要求。而船用蒸汽动力装置负荷变化频繁,且变化辐度大,其控制系统的技术难度大。本文作者介绍了某船用蒸汽动力装置集中控制监测系统的组成,功能及系统的创新点。     

扭振测量仪低速性能的改进

非接触式扭振测量仪是内燃机及其动力装置轴系扭振测量发展的方向 ,但是目前常见的非接触式扭振测量仪对于大型低速船用柴油机轴系的扭振测量尚不适应。为此需对非接触式扭振测量仪进行低速性能改进。本文所研究的就是对现有的非接触式扭振测量仪检测中的某些局限性提出改进措施 ;通过对比实验找到一种比较可行的方案     

MAN推出ME-LGI双燃料发动机技术

正随着重油价格的不断攀升,以及欧洲和北美港口排放法规的日益严格,船舶行业对替代燃料的兴趣也越来越大,其中包括甲醇和LPG。运输船使用甲醇和LPG作为燃料已有几年了,并且随着替代燃料基础设施在全球的扩张,船厂还在建造更多的燃料运输船。有LNG运输船使用LNG作为船用燃料在先,甲醇和LPG运输船燃用船载燃料也是可行的,且有方便、相对便宜等优势。     

LPG摩托车发动机喷射方式的研究

阐述了LPG摩托车的发展及存在的问题。在试验研究的基础上，分析了LPG摩托车进气道气态喷射、进气道液态喷射和缸内液态直接喷射对发动机动力性和排放的影响。提出采用液态喷射可以提高LPG摩托车发动机的动力性，是未来LPG摩托车的发展方向。     

工程车燃用LPG对动力性和排放的影响

作者对用于与叉车配套的柴油机改装的燃用LPG单燃料发动机进行试验研究,结果表明只要合理设计和选择燃烧系统、LPG系统、压缩比及配气相位,改装后的LPG发动机可以获得与原柴油机相同功率和扭矩,碳烟排放近于零,其他有害废气污染物也有明显改善。这对于仓库、车间、码头运作的工程机械,采用LPG发动机可以大大改善环境条件。这一技术同样可以用于城市柴油车辆的改造。     

Numerical simulation of the effect of LPG blending on the characteristics of a diesel engine

The present work aims to investigate numerically the effect of LPG blending on the characteristics of diesel engines subjected to variable compression ratio, injection timing, and engine speed. Three blends of LPG are used, which are 10% LPG + 90% diesel, 20% LPG + 80% diesel, and 30% LPG + 70% diesel. The numerical investigation is carried out using the simulation software Diesel-RK. Increasing the percentage of LPG in diesel starts combustion early where the lowest delay period is recorded for a blend of 30% LPG + 70% diesel 6.36 deg. The combustion pressure and heat release are decreased due to the difference in the heating values of blended fuels. Although the peak energy release for diesel is 0.05458 (1/deg.) at 375 deg. BTDC, it was 0.0542, 0.05424, and 0.0537 (1/deg.) at 375 deg. BTDC for 10%, 20%, 30% LPG, respectively. Diesel with 30% LPG has a higher spray penetration followed by 20% LPG then 10% LPG and diesel come last. The diesel with 10% LPG gives a 5.35% reduction in NOx, while diesel with 20% and 30% LPG emit less NOx emission by 9.05% and 16.5%, respectively. Increasing the percentage of LPG in diesel yields to reduce soot concentration because LPG has lower carbon to hydrogen ratio. The lowest ability to emit smoke is detected for fuel with 30% LPG where a 7.4% reduction is obtained. It is worth noting that blending LPG with diesel can fight the trade-off relation between Soot-NOx as a reduction in both of them is obtained. Based on the results obtained, the blending ratio is 30% LPG. The obtained results are validated with the results of other researchers.     

在电喷发动机上燃用LPG的试验研究

我国的LPG中C4H10(丁烷)含量比较大。在电喷发动机上使用汽油、纯C，H8(丙烷)和75％C3H8 25％C4H10三种燃料进行对比试验。当用纯C3H8代替汽油时发动机功率下降10％，但有害排放物下降5090％。在LPG中当提高C4H10的比例为25％时，发动机功率下降幅度减少，同时有害排放物可继续下降。在我国作为清洁燃料，LPG在电喷发动机上的应用具有广阔的前景。     

Exergetic analysis of an LPG evaporator/regulator with thermal storage

In this study, the efficiency of an LPG evaporator/regulator (E/R) is investigated on both energy and exergy concept. The E/R, which is a key part of LPG conversion systems that enables gasoline engines to be operated on LPG when desired, has been transformed to a thermal energy storage (TES) system using an adequate amount of phase change material (PCM) to be able to store waste energy of the engine coolant, so that the engine can be operated on LPG rather than gasoline even at cold start to decrease fuel consumption and exhaust emissions. The engine has been tested at idle speed at 4 °C environment temperature. The PCM application provided the engine to be operated on LPG at cold start and increased the efficiency of the E/R in a considerable extent on both energy and exergy bases. It was observed that using PCM in the E/R for thermal storage, the net efficiency differences of the E/R with PCM application reach to the values of 20% and 10%, respectively for the energy and exergy calculations. The net 2nd law efficiencies were lower than the ones that of 1st law with the values of about 11% for gasoline operation, and 8% for LPG operation of the engine.     

液化石油气(LPG)--柴油双燃料发动机的试验研究

用一种独特的方法,对液化石油气-柴油双燃料发动机进行了研究。试验结果表明,液化石油气-柴油双燃料发动机可得到与柴油机相类似的性能。控制废气再循环和低负荷时切断液化石油气供应是降低排放的一个较好方法。     

低排放LPG发动机控制系统开发研究

开发研究了低排放液化石油气（ＬＰＧ）发动机控制系统,用试验手段研究了ＬＰＧ发动机加装该系统后的排放情况及动力性能,排放指标达到欧洲Ⅱ排放标准、动力性能仅相差５％左右的结果。     

摩托车汽油机LPG供气装置的应用研究

本文介绍了液化石油气（PLG）的特性,针对摩托车汽油机进行了LPG的应用研究工作,对采用纯LPG供气方法的摩托车汽油机LPG供气装置的匹配技术进行了初探索,为其进一步优化匹配提供了技术依据,同时也提出了改进方向。     

代用燃料发动机碳烟排放的试验研究

针对发动机机燃用LPG(液化石油气)和柴油混合燃料的碳烟排放问题进行了研究。发动机的碳烟排放量随着燃料中LPG所占比重的增加而迅速下降,但在掺比达到一定值时又开始有所上升,只要控制掺比在合适的范围内,就可以明显减少内燃机的碳烟排放。     

Application of phase change materials to pre-heating of evaporator and pressure regulator of a gaseous sequential injection system

The vehicle engines having gaseous sequential injection systems of liquefied petroleum gas (LPG) are operated on gasoline until the engine coolant reaches the required temperature because the heat of the engine coolant passing through the evaporator and pressure regulator (E&PR) is not enough to vaporize the LPG that is at liquid phase. Therefore, the fuel economy and the decreasing pollutant emissions emitted to the environment through use of LPG cannot be completely achieved at cold start of the engines. In this study, an E&PR that can store thermal energy was designed by using of phase change material (PCM) in order to overcome cold start problem of E&PR in vehicles operated with LPG. The thermal behavior of the E&PR with PCM was determined at idle operating conditions and the effects of using the E&PR surrounded with PCM on exhaust emissions (HC, CO) were examined. It was observed from the study that the E&PR with PCM can solve the cold start problem of the LPG powered engines. The E&PR surrounded with PCM could start the engine with LPG after the 15 h cooling period of the engine and LPG usage decreased HC and CO emissions by 17.32% and 28.71%, respectively.