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1.
根据填料喷淋型全热回收器中实际热质交换情况,通过合理简化假设,得出了空气与水热量和质量交换的数学模型;将数学模型的计算结果与试验结果进行了对比,二者具有良好的吻合性;分析了填料高度对能量吸收装置出口水温、空气出口焓值的影响;分析了填料高度对填料喷淋型全热回收器换热效率的影响。  相似文献   

2.
阐述了一种全热回收器的设计及开发过程,并通过实验测试,研究分析了室内外温差、湿度差、焓差对全热回收器效率的影响;探讨比较了全热回收器与普通热管的节能性。  相似文献   

3.
反渗透海水淡化技术最新研究动态   总被引:16,自引:2,他引:14  
从降低海水反渗透淡化产水成本和环境友好过程的开发两个方面探讨了国内外海水反渗透淡化技术的最新研究成果和应用情况,包括能量回收器的研究、新型工艺过程的设计、海水反渗透膜的研究和应用、用膜法预处理代替传统化学器预处理以及NF—SWRO—MSF过程集成5个部分.  相似文献   

4.
运用变声速增压气体压缩方法,用具有一定压力的常温脱盐水通过变声速增压器引射发电厂汽轮机排出的低压水蒸汽,使其压力升高后进入蒸汽冷凝水(热)回收器。在蒸汽冷凝水(热)回收器内,低压水蒸汽放出潜热冷凝成水,与常温脱盐水共同成为回收器内压力下的具有较高温度的脱盐水。以此脱盐水作热源,建设供热站,对外供热,可满足冬季采暖用户对热能的需求。  相似文献   

5.
目前热回收器的类型有板翅式、管式、热管式及转轮式等热回收器。比较了这几种热回收器的性能、优缺点及热回收效率,并介绍了一种新的空调组合:转轮式热回收型蒸发冷却空调,将转轮式热回收器集成到蒸发冷却空调系统中,在我国西北地区应用既能满足人的热舒适性,又能降低能耗。  相似文献   

6.
利用空调器本身的风机从热回收器内引进新风,通过热交换回收排风的能量。采用空气焓差法对空调器引进新风前后进行制冷量、输入功率、能效比(EER)等的对比实验,并测量了换热器的热回收效率。用热回收装置引进新风后基本没有改变空调器的输入功率,相同环境条件下的制冷量增加,EER值增大,焓差热回收效率最高可达到34.12%。  相似文献   

7.
余热及废气排放问题是制约生产可持续发展的重要因素,为充分利用轮胎硫化过程中产生的高温蒸汽,需要对轮胎生产车间的制冷采暖系统进行改造。本文针对威海三角轮胎150万套生产车间,提出将乏汽回收器回收的废热蒸汽,夏季用于溴化锂制冷机组制冷,冬季直接用作加热热源的改造方案。通过计算一次能源能效比PEER和费用现值评价系统的能耗量及经济效益,证明系统改造后实现了能量的梯级利用,达到了节能减排的目的,因此改造方案切实可行。  相似文献   

8.
以我国武广客运专线G1117次高速列车为研究对象,采用TRNSYS软件对列车空调系统安装热回收装置节能效果进行了模拟计算,通过计算结果对热回收装置的经济性进行了分析。研究结果表明:高速列车空调系统通过采用全热回收夏季的总节能量为1573.637kWh,节能率为34.6%;冬季全热回收总节能量为1152.780kWh,节能率为30%。安装热回收器的静态回收期为3.5年,因此,武广客运专线采用热回收装置的节能性和经济性较为显著。  相似文献   

9.
圆筒形钢绒毛银回收器加料时,需用漏斗使废定影液通过进料管加入简体,操作非常麻烦。本文介绍箱形银回收器兼做定影槽台架,操作方便,设备简易,占地紧凑。箱形银回收器1由隔板2分成若干个银回收室3,相邻隔板上有交叉的下流孔4和上流孔5,末端银回收室箱体侧壁上  相似文献   

10.
介绍集中式空调系统风冷式冷(热)水机组由于水系统维护问题导致的报警故障,并以某风冷螺杆式冷(热)水机组热回收器中换热铜管腐蚀泄漏故障为案例,通过对换热铜管的腐蚀处进行电子显微镜分析和化学分析以及水质检测,发现由于水系统水流量不足造成系统内部低压,外界空气通过排气阀进入热回收器,最终水中溶解氧含量超标导致热回收器中铜管腐蚀,指出必须重视集中式空调水系统的维护。  相似文献   

11.
In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.  相似文献   

12.
13.
A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.  相似文献   

14.
On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……  相似文献   

15.
Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……  相似文献   

16.
A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.  相似文献   

17.
In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M2(B,C), (W,Mo)2(B,C), M3(B,C), M23(B,C)6 type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm2. The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K1 mill housing of bar mill.  相似文献   

18.
We associate a variety of innovations with the term "Industry 4.0". The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...  相似文献   

19.
The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...  相似文献   

20.
Several researches have been reported about the characteristic of β-Ga2O3 nanowires which was synthesized on nickel oxide particle. But indeed, recent researches about synthesis of β-Ga2O3 nanowires on oxide-assisted transition metal are limited to nickel or cobalt oxide catalyst. In this work, Gallium oxide (β-Ga2O3 ) nanowires were synthesized by a simple thermal evaporation method from gallium powder in the range of 700 - 1000℃ using the iron, nickel, copper, cobalt and zinc oxide as a catalyst, respectively. The β-Ga2O3 nanowires with single crystalline without defects were successfully synthesized at the reaction temperature of 850, 900 and 950℃ in all the catalysts. But optimum experimental condition in synthesis of nanowires varied with the kind of catalyst. As increasing synthesis temperature,the morphology of gallium oxide nanowires changed from nanowires to nanorods, and its diameter increased. From these results, we could be proposed that the growth mechanism of β-Ga2O3 nanowires was changed with synthesis temperature of nanowires. Microstructure and morphology of Synthesized nanowire was characterized by HR-TEM, FE-SEM, EDX and XRD.  相似文献   

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