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1.
高温冷凝水回收装置是密封式冷凝水回收系统的关键设备,装置将喷射泵和离心泵结合起来,利用喷射泵的增压原理来解决离心泵在泵送高温饱和凝结水时的汽蚀问题。文章从理论上分析了在回收装置条件下喷射原理和单纯喷射泵的喷射原理之间的差别,提出在回收装置条件下喷射方程推导的一些基本概念,并在此基础上推导在回收装置条件下的喷射基本方程和汽蚀方程,建立了回收装置条件下的效率方程,特征方程和性能方程。  相似文献   

2.
在Matlab/Simulink软件中搭建了主动干预型消弧装置仿真测试模型,将装置和转移点接地网阻值等效为阻值模块,设置不同阻值的单相接地故障,进行装置等效动作仿真,并在10 kV真型配电网中进行装置带电测试。通过对比分析,探索了装置的启动阈值和故障电流的转移效果,验证仿真模型的可行性,为装置的现场调试及应用提供了重要参考。  相似文献   

3.
本文介绍了DWQ-II型微机群控装置的工作原理和特点,在安装本装置时采取的抗干扰措施,以及本装置在调试时进行的参数整定,微机群控装置在热处理车间的实际运行情况和所取得的经济效益。  相似文献   

4.
《工业加热》2010,(6):56-56
此项实用新型专利是将手动可旋转式炉门碳氧枪的枪体后端设置在主操作杆装置上,前端放置在枪体停放架上;主操作杆装置与转动连杆装置上的U型进行又连接,转动连杆装置上设置有支撑作用的支撑轮装置和定位锁紧装置。可利用人工操作多自由度机构实现氧碳喷枪在不同的位置,具有实时性和高准确性。  相似文献   

5.
蒸汽-燃气联合循环装置由于其较高的发电效率而被广泛应用于各大、中型电厂。然而,在微小型燃气-蒸汽发电装置中,蒸汽轮机的应用无疑使得装置体积和成本费用大增。因此,本文提出在小型分布式发电装置中,采用环境压力吸热燃气轮机循环(APGC)装置来替代蒸汽轮机装置吸收燃气轮机排出的废气能量,组成燃-燃联合循环,增加系统本身的做功能力和效率,达到节能、减少燃料消耗的目的。本文从热力学第一定律和第二定律出发,基于ASPENPLUS软件分别建立了燃-燃联合循环、蒸-燃联合循环模型,比较分析了两种循环装置在能量质量和数量上的利用程度。结果表明:燃-燃联合循环装置的效率较高,这在要求能源高效利用的今天具有一定的理论意义。  相似文献   

6.
钱君 《中外能源》2011,(2):99-99
赢创工业公司于2010年12月14日宣在,计划在亚洲建设世界规模级异佛尔酮和异佛尔酮二胺装置.装置计划于2013年投入生产,建设的装置地点可能在东南亚和中国。  相似文献   

7.
风力发电具有的间歇性、随机性和难以预测性等缺点给电网带来了冲击,限制了风电的大规模并网。储能装置以其运行方式灵活、可充可放的运行特性、与环境兼容等特点与风力发电联合运行,为风电等可再生资源规模化利用提供了有效途径。因而总结了储能装置在含风电电力系统中的应用,介绍了各种储能装置的分类,在此基础上研究了各种储能装置的特性和适用范围,分析了储能装置在含风电电力系统中的应用现状,并探讨了储能装置未来的研究方向。  相似文献   

8.
1前言机车空调装置由1个空调电源、2台空调机组和2个操纵盒组成。空调装置试验的目的是要检验其相关性能是否达到要求:在空调装置制冷工况下观察是否有冷气排出,排出的冷气和环境温度的温差是否符合标准;在空调装置制热工况下观察是否有热气排出,排出的热气和环境温度的温差是否符合标准;空调装置在运行过程中有无异音,  相似文献   

9.
《现代车用动力》2006,(3):13-13
一种用于柴油机共轨喷油器的密封装置,是一种将燃油和工作油直接输入柴油机共轨喷油器内并将它们固定在气缸盖上的密封装置,由密封装置本体、密封圈、波纹密封圈和垫圈组成,密封装置本体上加工有燃油通道和工作油通道,燃油和工作油分别通过这两个通道进入共轨喷油器内,密封装置本体通过螺栓与柴油机共轨喷油器固接,整个密封装置通过固定螺栓安装在气缸盖上,并通过改变垫圈厚度的方法来调整共轨喷油器喷嘴在气缸内的高度。本发明可直接用于需使用共轨喷油器的现有柴油机上,缸盖改造简单。  相似文献   

10.
横管降膜蒸发太阳能海水淡化装置的性能分析   总被引:3,自引:0,他引:3  
在分析横管降膜蒸发机理的基础上,设计了一台降膜蒸发太阳能海水淡化装置,并对影响该装置性能的因素进行了实验研究。结果表明,该装置比传统的叠盘式太阳能海水淡化装置瞬态时间短,蒸发效果好,运行温度低。保持合理的海水喷淋密度,使海水在管外降膜蒸发,可使装置在较宽的温度范围内(70~9012)运行,且具有较高的淡水产量和能源利用率(7096以上)。  相似文献   

11.
为促进球形气垫式调压室的工程应用,通过介绍球形气垫式调压室水位和压力波动计算原理和方法,给出了水位和压力波动方程及具体求解步骤。结合工程实例,计算分析了气体状态方程多方指数对水位波动、气室压力的影响及引水系统的小波动稳定。结果表明,多方指数越大,水位波幅越小,气室压力波幅越大。球内控制水深越小,气室压力越大,气体体积越大,水位波动衰减率越大,小波动稳定性越好。研究成果可为球形气垫式调压室的应用和运行提供参考。  相似文献   

12.
A thermodynamic analysis of refueling of a gaseous hydrogen fuel tank is described. This study may lend itself to the applications of refueling a hydrogen storage tank onboard a hydrogen fuel-cell vehicle. The gaseous hydrogen is treated as an ideal or a non-ideal gas. The refueling process is analyzed based on adiabatic, isothermal, or diathermal condition of the tank. A constant feed-rate is assumed in the analysis. The thermodynamic state of the feed stream also remains constant during refueling. Ideal-gas assumption results in simple closed-form expressions for tank temperature, pressure, and other parameters. The non-ideal behavior of high-pressure gaseous hydrogen is addressed using the newly developed equation of state for normal hydrogen, which is based on the reduced Helmholtz free energy formulation. Sample calculations are presented using initial tank and feed stream conditions commensurate to practical vehicular applications. Comparing to the non-ideal analysis, the ideal-gas assumption always results in under-prediction of the tank temperature and pressure irrespective of the filling condition. For a given target tank pressure, the refueling time is the shortest under adiabatic condition and is the longest under isothermal condition with the tank being maintained at the initial tank temperature. The adiabatic and isothermal conditions can be viewed, respectively, as the lower and upper bounds of the refueling time for a given final target tank pressure.  相似文献   

13.
石久胜  韩晶 《节能技术》2005,23(4):372-374
太阳能开水器以电作为补充能源进行开水供应。本文利用动态的年计算费用法将这种供应形式与电开水器进行了比较。经计算,在长春地区按7月份平均的太阳辐射强度确定出的集热器面积使太阳能开水器年费用最小,与开水供应量相同的电开水器相比,其回收年限为4.1年。从经济性方面来看,这种开水供应形式在长春地区使用是可行的,经济效益比较可观,在全国大部分地区都有推广价值。  相似文献   

14.
通过计算流体动力学(CFD)模拟计算分析某实际工程设计阶段的充盐策略参数,对储罐内熔盐温度和储罐壁面温度的影响,通过分析模拟结果后确定在项目具体实施阶段采用预热系统及电加热器系统配合的充盐策略。通过将此充盐策略用于实际商业项目第1次充盐过程,效果良好,储罐整体温度较为均匀,同时也发现在第1次充盐过程中储罐基础存在较为明显的散热作用,应当引起足够重视。  相似文献   

15.
M.A. Rosen 《Solar Energy》1998,63(2):69-78
The results are reported of an energy-economic analysis of the use of berms in thermal energy storage (TES) systems. The analysis compares the initial cost savings derived from using a bermed tank instead of an in-ground tank, with the additional costs associated with the greater heat losses for the bermed tank over the life of the installation. The main factors considered include: (1) the increased excavation associated with an in-ground tank, (2) the increased wall structural support required for an in-ground tank, (3) the haulage and disposal of excavated soil for an in-ground tank, compared with the haulage and disposal or acquisition of soil for a bermed tank, (4) the forming of soil into a berm, and (5) the increased heat loss associated with a bermed tank. In evaluating the last factor, the findings of previous studies are used by the author into the effects of berms on TES heat losses. As space for the berm is assumed available, the cost associated with any land additionally required for the berm is neglected. The results indicate that tanks having berms are, in most practical instances, economically superior to other tank configurations.  相似文献   

16.
《Energy》2005,30(8):1419-1428
The small-scale tank irrigation system is an effective option for sustainable agricultural water development. The management strategy for water release in such a system is considered in the framework of variational calculus. A minimum principle is deduced to characterize an optimal strategy minimizing a performance index that evaluates water content deviation in the command area and the time when the irrigation tank dries up. The optimal strategies are demonstrated in two practical example systems.  相似文献   

17.
Natural gas is used worldwide as a practical energy source. In order to have a concentrated form of energy, natural gas is liquefied and stored under a pressure slightly above atmospheric and at a corresponding temperature just above its normal boiling point (112 K). This investigation presents a general steady-state study of the heat transfers into such a storage tank. Two mathematical models are proposed in order to help improve the thermal design process for such a tank. It is concluded that the aspect ratio (i.e. height-to-radius) of such a tank for the minimum rate of heat gains should be approximately unity. This value differs from the economically most favourable aspect ratio, i.e. that leading to the least total financial expenditure over the lifetime of the tank. However, the two models allow a complete simulation of the thermal costs. As the unit cost of fuel rises relative to other costs (e.g. for the construction of the tank), the overall most economic tank design approaches that of the optimal thermal design of tank as deduced in this investigation.  相似文献   

18.
Numerical simulation of a hydrogen storage tank of a Totalized Hydrogen Energy Utilization System (THEUS) for application to commercial buildings was done to verify the practicality of THEUS. THEUS consists of a fuel cell, water electrolyzer, hydrogen storage tank and their auxiliary machinery. The hydrogen storage tanks with metal hydrides for load leveling have been previously experimentally investigated as an important element of THEUS. A hydrogen storage tank with 50 kg AB5 type metal hydride was assembled to investigate the hydrogen-absorbing/desorbing process, which is exothermic/endothermic process. The goal of this tank is to recover the cold heat of the endothermic process for air conditioning, and thus improve the efficiency of THEUS. To verify the practical effectiveness of this improved system, we developed a numerical simulation code of hydrogen storage tank with metal hydride. The code was validated by comparing its results with experimental results. In this code the specific heat value of the upper and lower flanges of the hydrogen storage tank was adjusted to be equal to the thermal capacity of the entire tank. The simulation results reproduce well the experimental results.  相似文献   

19.
In this paper, the experimental analysis of a full-scale Domestic Electric Hot Water Storage Tank (DEHWST) with a capacity of 150 l is reported. The tank is equipped with three different inlets and two different outlets of practical interest. The dynamic mode of operation of the tank has been experimentally analyzed taking into account the six possible inlet–outlet port arrangements and water draw-off flow rates of 5, 10 and 15 l/min. The analysis is based on the transient temperature distributions of the outlet and inlet water flow and on the transient temperature profiles of the water inside the tank measured by an appropriate data acquisition system. Performance parameters to evaluate the thermal stratification in the tank and the discharging energy and exergy efficiencies are defined and calculated from the experimental data. The characteristic performance of the tank with different inlet–outlet port configurations is analyzed and the best one is identified and proposed to use in practice.  相似文献   

20.
环境温度和压力对坦克柴油机冷却空气影响的CFD仿真研究   总被引:1,自引:0,他引:1  
为了掌握不同环境温度、压力下坦克柴油机冷却空气的流动与传热性能,将计算流体力学应用于坦克柴油机冷却空气的仿真。在仿真值与试验值对比结果符合较好的前提下,对不同环境温度、压力对冷却空气流动与传热的影响进行了数值仿真,基于仿真结果,拟合得到了冷却空气平均温度随环境温度、压力变化的简便计算公式,适合于工程实用。  相似文献   

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