板壳式降膜蒸发器结构及性能研究

结合板壳式换热器和板式蒸发器的结构特点，在高效水平管喷淋式降膜蒸发器的基础上，开发一种新型板壳式降膜蒸发器，理论分析和实验结果均表明，以椭圆腔板束为蒸发内件的新型蒸发器，蒸发速度快，传热效率高。     

局部阴影条件下光伏阵列数学模型研究

局部阴影条件下,光伏阵列电流电压输出特性曲线呈阶梯状,使得光伏阵列电流电压输出方程的求解相对复杂.传统的电路指数模型,存在计算量大、参数不易确定等缺点.指数型工程用数学模型只需根据厂家提供参数即可建模,但是由于模型中含有指数或对数函数,通过计算机泰勒展开后运算量仍然较大,影响了控制器解算光伏电池方程的速度.为解决上述问题,提出在光伏电池平抛运动学模型的基础上,推导出分段平抛运动轨迹方程组来表达被部分遮挡的光伏阵列输出特性.采用MATLAB软件建模解算,并与指数模型和实测数据对比后表明,求解过程计算量小,误差在工程精度要求范围内,有利于最大功率跟踪,为光伏阵列模拟器中控制器优化设计提供了依据.     

S7-300PLC在糖厂蒸发自动控制系统中的应用

本文介绍SIMATIC S7系列PLC在糖厂蒸发自动控制系统中的应用。从蒸发系统的工艺流程,控制系统的硬件配置和软件设计这几个方面做介绍,并阐述了如何通过常规PID控制算法来实现蒸发液位自动控制系统。     

Inorganic EL devices with high‐performance blue phosphor and application to 34‐in. flat‐panel televisions

Abstract— A high‐performance inorganic electroluminescence (EL) device has been successfully developed by using an EL structure with a thick dielectric layer (TDEL) and sputtered BaAl₂S₄:Eu blue phosphor. The luminance and efficacy were higher than 2300 cd/m² and 2.5 lm/W at L⁶⁰, 120 Hz, respectively. Furthermore, the luminance at L⁶⁰, 1.2 kHz was more than 23,000 cd/m². The phosphor layer has a single‐phase and a highly oriented crystalline structure. The phosphor also shows high stability in air. A 34‐in. high‐definition television (HDTV) has been developed by combining a TDEL structure and color‐conversion materials. The panels with an optimized color filter demonstrated a peak luminance of 350 cd/m², a color gamut of more than 100% NTSC, and a wide viewing angle similar to that of plasma‐display panels. The high reproducibility of the 34‐in. panels using our pilot line has been confirmed.     

空调蒸发器的自适应预测控制策略

针对空调蒸发器运行状态,提出一种基于模糊神经模型的自适应单神经元预测控制器,该控制器具有结构简单、易于操作、控制器参数可在线调节的特点.离线建立空调蒸发器的模糊神经模型,再利用模型的梯度信息在线调节单神经元控制器参数,使控制系统较快地趋于稳定.仿真结果表明,提出的自适应单神经元预测控制器具有较好的动态性能和稳态性能,并能够成功地应用到空调蒸发器的控制中.     

Metallic Particles-Induced Surface Reconstruction Enabling Highly Durable Zinc Metal Anode

Aqueous zinc batteries usher in a renaissance due to their intrinsic security and cost effectiveness, bespeaking vast application foreground for large-scale energy storage system. However, uncontrolled dendrite growth along with hydrogen evolution severely restricts its reversibility and stability for practical application. Herein, the surface of Zn metal is reconstructed with metallic particles (In, Sn, In_0.2Sn_0.8) to diminish surface defects and regulate Zn deposition behavior. The alloyed In–Sn greatly activates the Zn surface for lower Zn adsorption energy barrier to expedite plating kinetics and confine Zn aggregation. Dense and uniform deposition of Zn on the reconstructed surface significantly prevents the Zn substrate from dendrites growth for catastrophic damage. Meanwhile, alloy layer embodies high hydrogen evolution overpotential, ensuring high plating and stripping efficiency for Zn anode. Consequently, In_0.2Sn_0.8 reconstructed surface realizes long-term lifespan up to 1800 h with low polarization (12 mV) at the condition of 1 mA cm⁻² and 1 mAh cm⁻². When paired with sodium vanadate (NVO) cathode, the full cell steady operates for a high-capacity retention of 94.0% after 5000 cycles at 5 A g⁻¹. This study provides new insights into the surface-defects dependent Zn deposition process and offers a guide for constructing stable surface for dendrite-free Zn growth.     

建筑装饰用仿金铜合金圆扁线的开发

介绍了建筑装饰用Cu-6Al-2Ni-0.1In仿金铜合金，其颜色为金黄色，具有优良的耐蚀性、铸造性和良好的加工性，并简要介绍了仿金铜圆扁线在玻璃门窗和铁门装饰上的应用及前景。     

低温废热高效回收系统的(火用)优化

多级闪蒸-混汽热力系统,是一种先进的废热高效动力回收的系统配置.采用复形调优法,以     

提高无线传感器网络能效的双轮成簇协议设计

提出一种用于提高无线传感器网络能效的双轮成簇协议(energy efficient double rounds clustering protocol,简称EEDRCP)。它对LEACH协议进行改进,以提高网络的能效。它在簇头选取算法中引入剩余能量参数,并且结合平面拓扑、层次拓扑和基于位置拓扑的优点形成混合型拓扑类型,同时改单轮成簇为双轮成簇。最后,在Matlab平台上模拟EEDRCP,并与LEACH和DIRECT协议进行分析比较。仿真结果表明,与LEACH协议相比,EEDRCP协议可提高网络能效达33%     

伞板式降膜蒸发器传热性能研究

对伞板式降膜蒸发器进行了合理的结构设计,并对此蒸发器的传热性能进行了实验研究。结果表明,伞板式降膜蒸发器在低温差下仍能保持较高的传热系数,得出了伞板降膜蒸发侧无因次传热系数的实验关联式并与竖直光滑管的传热性能进行了比较。同时对伞板式蒸发器进行了液膜破裂的实验研究,得出了液膜破裂条件的实验关联式并与竖直管的破断条件进行了比较,从而得出了此蒸发器在小流量下,液膜分布均匀不易破裂等特性。