共查询到19条相似文献,搜索用时 58 毫秒
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夏季空调冷凝水回收利用方案的实施 总被引:6,自引:0,他引:6
通过对某电讯厂空调冷凝水回收利用方案的实施,介绍了夏季空调冷凝水作为一种辅助性冷源如果加以利用,能取得节能和节省投资的目的。 相似文献
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以美的MDV-JD22G/Y型挂壁式室内机为例,计算空调器冷凝水每小时产生量。从计算结果来看,空调器每日产生的水量足以提供人体每日所需水量。针对空调器的结构特点提出了冷凝水净化成饮用水的净化工艺。对净化后的冷凝水进行水质检验,各项指标符合国家标准。 相似文献
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中央空调冷凝水回收利用不仅降低了空调系统冷却水的消耗,减少了冷却塔补水泵的运行时间,也提高了冷水机组的运行效率,同时减少了空调系统的电耗.本文介绍了某大厦中央空调系统冷凝水回收利用节能改造工程的实施及效果. 相似文献
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风 风能 风力发电——21世纪新型清洁能源 总被引:7,自引:0,他引:7
一风的一般属性1风的形成风是人们非常熟悉的一种自然现象,人人都能感觉到它的存在。春风和煦,给万物带来生机;夏风吹拂,使人心旷神怡;秋风送爽,带来丰收的喜悦;冬风呼啸,迎来漫天飞雪。那么风是怎样形成的呢?众所周知,人类生活的地球表面被大气所包围,来自太阳的辐射不断传送到地球表面,因太阳辐射受热情况不同,地球表面各处的气温不同。在影响气压高低的因素中,气温起着最重要的作用。温度高的地区空气受热上升,气压减小;温度低的地方,空气下降,气压增大,于是产生了气压差。和水往低处流一样,空气也从气压高处向气压… 相似文献
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储能系统由于能够实现电能的时空平移,具有响应速度快,规模化等优点,是改善风电波动性,提高其并网能力的有效手段,构建风储联合发电系统成为目前研究重点.简单介绍了风电并网对电力系统的影响及不同类型电池储能技术的发展现状,给出了部分国内外风储联合发电系统的示范工程,并分析了平滑风电功率波动,跟踪计划出力曲线和削峰填谷3种主要运行方式,重点阐述了目前风储联合发电系统控制策略和储能容量配置研究现状,对进一步开展风储联合发电系统的研究进行了展望,指出经济性仍然是制约储能技术应用的关键问题之一,提高包含储能单元的风储联合发电系统的经济性是今后的研究重点. 相似文献
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S. M. Muyeen S. Shishido Mohd. Hasan Ali Rion Takahashi Toshiaki Murata Junji Tamura 《风能》2008,11(4):335-350
In this paper, it is reported that energy capacitor system (ECS), which combines power electronic devices and electric double‐layer capacitor, can significantly decrease voltage and power fluctuations of grid‐connected fixed‐speed wind generator. The proper selection of wind farm output power reference is still a problem for smoothing the wind farm output power. This paper proposes exponential moving average to generate the reference output power of a grid‐connected wind farm. The objective of the control system is to follow the line power reference by absorbing or providing real power to or from the ECS. Moreover, the necessary reactive power can also be supplied to keep the wind farm terminal voltage at the desired reference level. Real wind speed data were used in the simulation analyses, which validate the effectiveness of the proposed control strategy. Simulation results clearly show that our proposed ECS can be suitable for wind power application. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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介绍了烟塔合一技术的原理及其在我国所面临的技术问题。烟塔合一技术取消了传统的火电厂烟囱,省去了烟气再热器(GGH),使整个系统得到简化。将净烟气通过冷却塔排向大气,不仅可以降低电厂的建设费用,而且还可以提高电厂效率,降低污染。 相似文献
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This paper presents a new direct power control (DPC) strategy for a doubly fed induction generator (DFIG)-based wind energy generation system. The strategy is based on the direct control of stator active and reactive power by selecting appropriate voltage vectors on the rotor side. It is found that the initial rotor flux has no impact on the changes of the stator active and reactive power. The proposed method only utilizes the estimated stator flux so as to remove the difficulties associated with rotor flux estimation. The principles of this method are described in detail in this paper. The only machine parameter required by the proposed DPC method is the stator resistance whose impact on the system performance is found to be negligible. Simulation results on a 2 MW DFIG system are provided to demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power, rotor speed, machine parameters, and converter dc link voltage. 相似文献
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Enhancing the utilization of photovoltaic power generation bysuperconductive magnetic energy storage
The authors demonstrate that a superconductive magnetic energy storage (SMES) system can enhance large-scale utilization of photovoltaic (PV) generation. Results show that power output from a SMES system can be used to smooth out PV power fluctuations so that the combined PV/SMES output is dispatchable and free from fluctuations. Power generated from PV arrays is shown to be fully utilized under different weather conditions, and PV penetration is increased to significant levels without adversely affecting the power system. Coupled with PV generation, a SMES system is even more effective in performing diurnal load leveling. A coordinated PV/SMES operation scheme is proposed, and its demonstration under different weather conditions is discussed 相似文献
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