高层民用建筑地下室及地下车库防火排烟设计的探讨

本文就高层建筑地下室、地下车库的通风、防火排烟系统，提出了一些与常规作法不太一致的观点和作法，涉及并对地下室排烟后补风、地下室排风兼排烟、地下车库的排风排烟进行讨论。     

柴油发电机房（风冷）通风设计探讨

柴油发电机房通风系统是发电机组高效运行的重要保障,而现有计算方法缺乏对发电机房通风量影响因素的全面考量,且未针对机房的不同进风方式对排风量进行具体分析。该文在分析柴油发电机组运行时热量分配及发电机房余热量构成的基础上,对发电机房通风量及余热量的不同计算方法进行对比研究,提出合理的柴油发电机房（风冷）通风设计思路,对设计人员实际工作具有参考意义。     

地下室柴油发电机房风冷通风设计探讨

对发电机通风散热的形式进行了介绍,叙述了地下室柴油发电机房通风散热的设计计算,并分析总结了地下室柴油发电机房通风井道设置的几种常见形式的优缺点,供暖通专业设计参考。     

广西某地区人防地下室固定电站降温冷却设计

本文介绍了人防地下室固定电站的降温冷却设计方法。根据工程实例对柴油发电机房内余热的构成,送排风机及冷风机的设备选型、冷却水池及混合水池的选型进行了详细的分析和计算,并给出了冷却水系统原理图、柴油发电机房通风原理图和平时运行与战时运行的通风方式操作顺序表。     

高层民用建筑人防地下室汽车库通风系统设计浅谈

分析了高层民用建筑人防地下室，汽车库通风系统设计特点，提出了占时人防通风系统，汽车库平时送风系统与消防补风系统兼用汽车库平时排风系统与排烟兼用的通风系统设计方法及简化步骤。     

柴油发电机房的暖通设计

为了保证柴油发电机房的使用要求,论文依据相关规范,从其使用特点出发,阐述了暖通专业在柴油发电机房设计中的几个要点,包括通风量计算、送排风形式、消防及事故通风设计等内容。提出了要兼顾平时、工作及事故3种工况。     

柴油发电机房的设计

概述柴油发电机作为应急备用的发电装置,在通信机楼、银行、国际展览中心、证券公司等重要负荷集中的建筑中是必不可少的。而柴油发电机房的设计是一个系统工程,它包括地址选择、燃油设置、进风、排风、排烟及环保消烟等一系列问题,如何使发电机组安全、高效地工作,是我们设计人员必需综合考虑的问题。     

浅谈某柴油发电机机房的通风设计

本文通过对某广电中心柴油发电机房通风改造项目改造方案的分析,浅谈柴油发电机机房的通风设计。     

人防地下室平时战时通风防护的探讨

人防地下室的通风按不同时段的功能分为平时通风和战时通风,平时通风是保障防空地下室平时功能的通风,主要功能有送排风系统、火灾时排风排烟和补风系统等;战时通风是保障战时功能的通风,包括清洁通风、滤毒通风、隔绝通风三种方式。笔者在防空地下室通风的施工图审查、质量监督工作中常常遇到一些不尽合理的地方,结合设计、施工和管理的各方因素,对此做一个粗浅的分析。     

柴油发电机组的选择与机房设计

介绍了柴油发电机组的选择和机房设计,详细叙述了选择柴油发电机组容量的三种计算方法：（1）按稳定负荷计算;（2） 按最大的单台电动机或成组电动机起动的需要计算;（3）按起动电动机时母线允许电压降计算,并在这三种方法中择其较大者来选择发电机组容量,对柴油发电机房的选址,通风排烟,接地等也作了介绍。     

Combustion analysis of the diesel–biogas dual fuel direct injection diesel engine – the gas diesel engine

In this investigation, biogas (BG) was used as an alternative fuel in a single-cylinder, four-stroke, air-cooled, direct injection (DI) diesel engine that was operated on a dual fuel mode. Biogas was produced from a non-edible seed de-oiled cake-pongamia pinnata (Karanja), which was collected from the biodiesel industries. The BG was inducted along with the air in suction of the engine at four different flow rates varying from 0.3?kg/h to 1.2?kg/h in steps of 0.3?kg/h. The investigation results revealed that BG inducted at a flow rate of 0.9?kg/h gives better combustion characteristics of engine behaviour than those of other flows throughout the engine operation. The ignition delay (ID) and combustion duration of the engine run by dual fuel operation at a BG flow rate of 0.9?kg/h were found to be longer by about 2 °CA and 2.9 °CA, respectively, in comparison with diesel at full load. The cylinder peak pressure was found to be overall higher by about 11?bar than that of diesel at full load.     

Experimental analysis of DI diesel engine using dual biofuel blended with diesel

ABSTRACT

In recent years, biodiesel has become more attractive as an alternative fuel for diesel engines because of its environmental benefits and the fact is that it is made from renewable resources. The role of biodiesel is not to replace petroleum diesel, biofuels help to improve the economical growth and positive impacts on the environment. The main purpose of this research is to reduce the emission such as carbon monoxide (CO), nitrogen oxides (NO_X), hydrocarbons (HC) and carbon dioxide (CO₂). And to increase the performance characteristics such as break thermal efficiency (BTE), specific fuel consumption (SFC) of diesel engines. Here we used dual biofuel (lemongrass oil plus mint oil) blended with diesel and cerium oxide is added as an additive and undergone the test of engine performance and emission parameters of diesel. The measuring parameters are BTHE, specific fuel conception, CO₂, CO, NO_x and HC.     

Emission reduction from diesel engine using fumigation methanol and diesel oxidation catalyst

This study is aimed to investigate the combined application of fumigation methanol and a diesel oxidation catalyst for reducing emissions of an in-use diesel engine. Experiments were performed on a 4-cylinder naturally-aspirated direct-injection diesel engine operating at a constant speed of 1800 rev/min for five engine loads.The experimental results show that at low engine loads, the brake thermal efficiency decreases with increase in fumigation methanol; but at high loads, it slightly increases with increase in fumigation methanol. The fumigation method results in a significant increase in hydrocarbon (HC), carbon monoxide (CO), and nitrogen dioxide (NO₂) emissions, but decrease in nitrogen oxides (NO_x), smoke opacity and the particulate mass concentration. For the submicron particles, the total number of particles decreases. In all cases, there is little change in geometrical mean diameter of the particles. After catalytic conversion, the HC, CO, NO₂, particulate mass and particulate number concentrations were significantly reduced at medium to high engine loads; while the geometrical mean diameter of the particles becomes larger. Thus, the combined use of fumigation methanol and diesel oxidation catalyst leads to a reduction of HC, CO, NO_x, particulate mass and particulate number concentrations at medium to high engine loads.     

HEUI柴油机燃油系统

详细分析了卡特彼勒公司在电控柴油机喷油系统上采用的最新技术——液压驱动电子控制单体式喷油器系统（HEUI）。     

HEUI柴油机燃油系统

详细分析了卡特彼勒公司在电控柴油机喷油系统上采用的最新技术--液压驱动电子控制单体式喷油器系统(HEUI).     

Evaluation of diesel engine performance using diesel–cashew nut shell oil blends

The performance, emission and combustion characteristics of a single-cylinder, direct injection diesel engine was studied at various loads at a constant speed of 1500?rpm with neat diesel and cashew nut shell oil (CNSO) blends. Among all the blends, 20% CNSO blend, showed better performance compared to all the other blends. Also, it has been found that CNSO blends can be used in the available diesel engine without making any modification.     

Experimental investigation on mahua methyl ester blended with diesel fuel in a compression ignition diesel engine

In this article, the mahua tree’s high importance in the present-day plantations is described and the preparation of mahua methyl ester (MME) from the raw mahua seed oil by the two methods of the transesterification process is described. The tested physical properties were compared with the requirement of ASTM D-6751. The obtained MME and its blends of B20, B40, B60, and B80 were investigated in an unmodified diesel engine. From the results of the performance, it has been observed that brake-specific fuel consumption and brake thermal efficiency are slightly improved (B20 and B40) at part-load conditions and approach diesel at full-load conditions. From combustion analysis, it was seen that ignition delay was shorter for biodiesel and its blends compared with the diesel fuel. The emission characteristics of carbon monoxide, hydrocarbons, and smoke opacity were reduced for all the fuel blends, but at high temperatures they undergo an endothermic reaction and produced various oxides of nitrogen.     

柴油机废气涡轮增压器及其故障诊断

针对目前废气涡轮增压器在使用过程中出现的一系列问题,分析了柴油机废气涡轮增压器的工作原理和结构,对其在工作过程出现的常见故障原因及故障诊断进行了介绍.最后,结合检验检测工作的实际提出了在使用和维修保养时的建议,为机械操作人员和维修人员以及检验检测人员提供一定的参考.