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兰溪电厂凝泵变频器节能改造分析 总被引:1,自引:1,他引:0
叙述了兰溪发电有限公司600MW超临界机组凝结水泵变频器改造的方案及除氧器水位控制逻辑以及改造后的节能情况,指出,通过近半年的运行,再与未改造机组比较,具有明显的经济性。 相似文献
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介绍在660MW机组凝结水泵变频改造中所修改的主要控制逻辑,包括除氧器水位调节,凝结水泵的启、停操作和联锁保护等,并通过相关试验和实际运行证实了改造后取得了较好的应用效果,对同类机组有一定的借鉴参考价值。 相似文献
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1设备概况与节能潜力分析石横发电厂 3、4号机组各配置 2台沈阳水泵厂制造的凝结水泵 ,型号为 9LDTN - 7,为立式筒袋结构 ,级数 :7级。 1台运行 ,1台备用。 3号机组A凝结水泵经过长期运行发现 ,在满负荷运行时 ,除氧器水位调节站副调阀开度为 6 0 %左右 ,主调阀还未参加调节 ,在高压力下 ,通过做试验 ,在其水位调节站后加装一压力表 ,此处节流现象较为严重 ,这样导致电机耗功过大 ,厂用电上升 ,且在其水位调节站后 ,凝结水压力达到 1 4MPa就能满足运行 ,可以看出通过设备治理能较大幅度地节能降耗。2节能改造技术方案该凝结水泵首级叶轮… 相似文献
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热泵热水器借助外部能量能把不能直接利用的低位热源转换为可以利用的高位热能,从而达到节约部分高位能的目的。阐述了热泵热水器的发展历史与应用现状,分析了空气源热泵的工作原理和节能原理,并将空气源热泵热水机组与电热水器、燃油热水锅炉、燃气热水锅炉等热水供应系统的性能进行了比较。在此基础上,结合企业工程应用实例,指出了推广热泵技术对于节能减排的意义。 相似文献
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给水泵是发电厂重要辅机之一,对电厂安全、稳定和经济运行起着非常重要的作用。文中分析了空冷机组的设计运行条件,推荐600MW等级直接空冷机组主给水泵组采用3×35%最大给水容量电动调速给水泵组。 相似文献
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针对东北地区350 MW供热机组湿冷系统循环水泵选型情况,结合华能大庆2×350 MW热电联产项目对寒冷地区供热机组循环水泵进行选型,结果表明,单级双吸卧式离心泵投资少、检修方便、运行可靠、运行成本低。 相似文献
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The principles of solar water pumping are briefly described. The mechanical energy needed for pumping water may be produced by thermodynamic, or direct-conversion methods. In thermodynamic conversion a fluid with high internal energy is produced in solar collectors or concentrators. The internal energy of the fluid may be utilized in Rankine-, Brayton-, or Stirling-cycles or in specially designed devices. The nature of irrigation in the arid regions calls for scattered water pumping stations, hence small solar pumps. These pumps may be mass produced and delivered to the site. The direct conversion includes photovoltaic, themoelectric and thermionic processes. With the current prices of solar cells photovoltaic water pumping seems to be economically competitive with the current solar Rankine-cycle system in the power ranges of below 5 kW, especially when both systems have to be imported by a developing country. 相似文献
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空调冷冻水泵变频能耗特性的研究 总被引:4,自引:0,他引:4
通过分析冷冻水管路特性随空调负荷变化的特点 ,得出了计算空调冷冻水泵变频调速运行总能耗的一般关系式。研究表明 ,在中央空调系统中 ,由于冷冻水管路特性曲线随空调负荷而变化 ,在确定水泵变频调速运行的能耗时已不能直接应用泵的相似定律 ;变频冷冻水泵的能耗并不与转速或流量的三次方成正比 ,而是与空调负荷、空调用户的流量分配及空调用户的位置等有关。 相似文献
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This paper presents an adaptive optimal control strategy for online control of complex chilled water systems involving intermediate heat exchangers to enhance operation and energy performances. This optimal control strategy determines the optimal settings of the heat exchanger outlet water temperature (hot side) and the required operating number of heat exchangers and pumps in order to minimize the total energy consumption of pumps under varying working conditions. Adaptive method is utilized to update the key parameters of the proposed models online. A simulated virtual platform representing a chilled water system in a super high-rise building was established to validate and evaluate the proposed optimal strategy. Test results show that the strategy has enhanced control robustness and reliability, particularly in avoiding deficit flow problem. Significant energy of chilled water pumps is saved when compared with conventional methods. 相似文献
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R. Posorski 《Solar Energy》1996,58(4-6):155-163
Photovoltaic water pumps (PVP) are an attractive tool for a rural drinking water supply. An international field testing programme verified the technical maturity of PVP and their reliable field operation. Within well defined site selection criteria, the PVP are competitive with or the least-cost option for replacing small diesel-driven pumps. Introduced to the users through an appropriate community participation concept, the PVP achieved a high level of acceptance by the users, as evidenced by their willingness to pay for the consumed water. 相似文献