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总结了北京市建筑质量监督总站电锅炉高温水蓄热系统。介绍了系统配置、运行策略、技术特点和运行经验。实测表明系统运行良好,该系统具有良好的经济和社会效益。 相似文献
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蓄热式烧嘴是一项先进的节能装置,但至今普及率不高,主要原因是一次性投资较大,维修费用较高.而煤气不换向蓄热式烧嘴设备投资少,系统简化,故障少,使用安全可靠. 相似文献
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通过工程改造项目介绍了蜂窝状蓄热体和蓄热小球混装的新型蓄热体结构,分析得出新型结构成本低,蓄热能力可提高20%以上,对于全新蓄热式加热炉蓄热室的设计具有指导和借鉴意义。实践表明,采用此种结构具有高效、优质、节能和低污染等诸多优点,具有广阔的开发应用前景。 相似文献
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蓄热空调 总被引:2,自引:0,他引:2
程志华 《能源技术(上海)》1996,(4):32-36
一、绪论1.蓄热空调在国民经济中的意义:随着改革开放的深入发展,人民生活水平的日益提高和外国友人交往增多等,人们对环境气温的要求提出了更高的标准。用扇子纳凉的时代早已过去,空调设备已进入了千家万户,宾馆、大厦、公寓、商场、企业、机关等都装上了中央空调。根据我们的统计,新建的大厦用电量60%以上是用于中央空调,可见在这种设备上考虑如何合理用电,计划用电是非常必要的。因此,我们多年来开始这方面的研究工作,认为蓄热空调是做好计划用电,调荷避峰的一个很好的方法,也是落实电力部提出“分时电价”的一个有力措施… 相似文献
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蓄热体作为蓄热室余热回收设备的核心材料,承担着冷热介质热量传递的任务,是蓄热式燃烧技术能否高效运作的关键。本文对蓄热体尺寸、形状、热工特性和材质进行了研究,并在分析韶钢蓄热式加热炉生产实践的基础上,寻找蓄热体寿命低的原因,实验高效长寿蓄热体材料,介绍了应用的经验与效果。 相似文献
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高压加热器切除对机组热经济性影响计算模型的研究及其应用 总被引:1,自引:0,他引:1
高压加热器(高加)切除对机组热经济性有很大影响。以汽轮机功率方程和锅炉吸热量方程为基础,并将机组的整个回热系统视为一闭口热力系统,通过对其的热平衡分析,得到了高加切除对机组热经济性影响的计算模型。计算实例表明:该模型具有计算准确、适用性强的特点。 相似文献
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再生式换热器的实验研究与数值模拟 总被引:1,自引:0,他引:1
为了解再生式换热器工作特性,采用Matlab软件计算简化后的模型,对换热器内流体和固体的温度分布进行了数值模拟,并进行了实验验证.研究了蓄热体长度、比表面积、速度和蓄热体材质对换热效果的影响.结果表明,面积和流速对换热效果影响明显,而改变蓄热体材质基本无影响. 相似文献
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Ewa Piotrowska Andrzej Chochowski 《International Journal of Heat and Mass Transfer》2012,55(23-24):7109-7118
The investigation of heat exchanger dynamics has been carried out. The three kinds of exchangers have been taken into consideration: the low power plate heat exchanger, the high power industrial heat exchanger and the model of heat exchanger. The dynamics of the examined exchangers has been analyzed using the parametric identification methods and their implementation in MATLAB. The character of observed phenomenon is not unique. In some of the cases it shows inertial character, in the others oscillatory character. It might indicate an appearing of the kind of a thermal oscillation during the non-stationary states of the heat exchanger. 相似文献
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《Geothermics》2001,30(2-3):349-390
Recent volcanism, high heat flow (4 HFU or 167 mW/m2), and high conductive geothermal gradients (up to 120°C/km) indicate that heat from a shallow silicic intrusion in the Clear Lake region is largely being dissipated by conduction. The Geysers area has the highest heat flow in the region, consistent with the presence of shallow convective heat transport within the vapor-dominated geothermal system. Thermal modeling of the Clear Lake magmatic-hydrothermal system based on petrologic and geophysical constraints provides a test of petrologic models, and yields insight into the relationships between observed thermal gradient and magma chamber size, abundance, and emplacement history in the crust. A user-interactive two-dimensional (2-D) numerical model allowing for complex host rocks and multiple emplacements of magma was developed to simulate conductive and convective heat transport around magma bodies using a finite-difference approach. Conductive models that are broadly consistent with the petrologic history and observed thermal gradients of the Mt. Konocti and Borax Lake areas imply a combination of high background gradients, shallow magma bodies (roofs at 3–4 km), and recent shallow intrusion not represented by eruption. Models that include zones of convective heat transport directly above magma bodies and/or along overlying fault zones allow for deeper magma bodies (roofs at 4–6 km), but do not easily account for the large areal extent of the thermal anomaly in the Clear Lake region. Consideration of the entire Clear Lake magmatic system, including intrusive equivalents, leads us to conclude that: (1) emplacement of numerous small and shallow silicic magma bodies occurred over essentially the entire region of high heat flow (about 750 km2); (2) only a very small fraction (much less than 10%) of the silicic magma emplaced in the upper crust at Clear Lake was erupted; (3) high conductive thermal gradients are enhanced locally by fault-controlled zones of convective heat (geothermal fluid) transport; and (4) except for the Mt. Hannah and possibly the Borax Lake area, most of the silicic magma present in the upper crust has solidified or nearly solidified. These bodies are currently difficult to distinguish from surrounding hot basement rocks dominated by graywacke using geophysical methods. The Clear Lake region north of the Collayomi fault is one of the best prospects for hot dry rock (HDR) geothermal development in the US, but is unlikely to provide significant development opportunities for conventional geothermal power production. Modeling results suggest the possibility that granitic bodies similar to The Geysers felsite may underlie much of the Clear Lake region at shallow depths (3–6 km). This is significant because future HDR reservoirs could potentially be sited in granitoid plutons rather than in structurally complex Franciscan basement rocks. 相似文献