共查询到20条相似文献,搜索用时 62 毫秒
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供热系统质调节的规范化与节能山西省运城地区建筑设计院李新波供热系统的调节,有质调节和量调节两种办法。其中量调节是在供回水温度不变的情况下,通过改变水量来达到节约能源的目的。但是热水采暖系统的设计,是以一定的水量为依据来计算的,当系统水量因调节而减少过... 相似文献
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常州热电公司在广泛调研的基础上.在新建和改造的热网管线上采用新型隔热管托、有专利技术的"环保镁钢"新型外护层和旋转式补偿器等产品,取得了良好的节能效果,可以为集中供热管网工程的节能降耗起一个抛砖引玉的作用. 相似文献
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This paper presents a real-time power flow controller for VSIs (voltage source inverters) interfaced to low voltage microgrids. The proposed controller is modular, flexible, intelligent, inexpensive, portable, adaptive and designed to positively contribute in low voltage microgrids in which the lines R/X ratio is greater than the transmission lines. Therefore, the proposed control strategy is developed for operation in distribution lines. The controller strategy is different from the conventional grid-connected inverters which are designed based on transmission line characteristics. This controller, using a Texas Instrument general purpose DSP (digital signal processor), is programmed and tuned using MATLAB/SIMULINK in order to enhance self-healing, reliability and stability of the grid. This general purpose controller makes proper decisions using its local measurements as the primary source of data. The controller has the capability of communicating with the adjacent controllers and sharing the information if/when needed. The power flow output of the inverter is tested for both islanded and grid-connected modes of operation. The inverter positively contributes to active and reactive power supply while operating in grid-connected mode. The proposed control method has been implemented on a Texas Instrument DSC (digital signal controller) chip and tested on a hardware test bench at the Alternative Energy Laboratory at WVU1T (West Virginia University Institute of Technology). The system's experimental results veri~ the validity and efficiency of the proposed controller. 相似文献
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叙述了蒸汽管道、锅筒、给水管道、省煤器。锅筒放水管、分汽缸等发生水冲击的基本原理,产生原因和预防措施。 相似文献
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从工程概况,调试依据、调试目的、目标、调试计划和程序以及调试工具、组织机构、安全措施等方面,叙述了某工程空调系统的调试方案。 相似文献
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散热管道在温室内放热特性的分析 总被引:1,自引:0,他引:1
设施农业是我国现代化进程的一个重要内容,现代化温室作为设施农业的标志,正在受到大力发展和重点研究。本论文重点研究温室热水供热系统散热管道的热工性能。论文主要进行了以下工作:1.分析了温室热水供热系统的型式及散热管道的布置方式;2.对温室热水供热系统散热管道的热工性能进行理论分析和计算;3.在密闭小室内,对温室散热管道热工性能进行实际测试,并得出散热管道传热系数的实验公式。 相似文献
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针对工程中常见的圆管流,采用切向引入装置使流体产生旋转流动,通过建立圆管螺旋流的三维模型,采用RNG-模型对管内流场进行了数值模拟,获得螺旋流的速度场以及强化传热特性。研究入口不同速度对强化传热性能的影响,为旋流强化传热装置的应用提供了必要的依据。 相似文献
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针对传统的潮流计算法牛顿—拉夫逊法和快速分解法在计算配电网潮流时收敛效果的不理想及配电网的特殊结构,对各种潮流算法进行了比较,提出了解决配电网潮流计算的改进快速分解法及前推回代法。实例表明,这两种方法是一种实用的配电网潮流计算法。 相似文献