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GN050601 可再生能源应用的重要领域.马重芳,底 冰,吴玉庭.中国能源,2005,27(9):11-13. 建筑用能具有品位低,温度范围窄,与自然能源的温 度接近三大特点,这三大特点决定了可再生能源是建筑用 能的首选。通过热泵的提升,可以将土壤能、地表水能、海 洋能应用到建筑中,这一技术已在国外得到大规模利用。 太阳能热发电是另一种最有希望与传统发电竞争的可再 生能源发电方式。 相似文献
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正固定电价政策即按各类可再生能源发电标准成本,直接明确规定各类可再生能源电力上网价格,电网企业必须按此价格向可再生能源发电企业支付费用。其主要特点是能保证可再生能源发电项目稳定的收益。固定补贴政策(溢价电价机制),既考虑可再生能源发电实际成本情况和价格政策需求,又与电力市场的竞价挂钩,是在电力市场价格基础上给予可再生能 相似文献
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研究一种针对办公建筑的源荷一体化监控系统,以机器自学习法对用户用电需求进行日前预测及超短期预测。基于太阳辐照度、温度、风速等实时监测数据对可再生能源发电量进行预测。根据以上预测对建筑内可再生能源、蓄能技术与常规能源开展优化调控。针对热泵供冷供热及太阳能光伏发电建筑,提出了一种优化控制策略,在保证建筑内用户舒适度的前提下有效减少用户用电负荷及可再生能源发电对电网的冲击,同时提高能源网内能源的高效利用性和可持续性。 相似文献
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风能水能资源的互补开发、综合利用是一种有效的可再生能源利用方式。通过阐述国际及国内风电发展现状,分析云南电力结构,研究云南风能资源特点,提出在云南建立基于风能水能互补发电的可再生能源体系。 相似文献
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力促大规模非水可再生能源发展 总被引:1,自引:1,他引:0
严陆光 《电网与水力发电进展》2009,25(3):1-4
综述了我国能源与电力可持续发展的现状和未来,着重阐述了风力发电、光伏发电、太阳能热发电等可再生能源发电发展的主要特点和问题,最后建议加快规划与部署建设以可再生能源为主体的综合能源基地,积极构建我国能源可持续发展体系。 相似文献
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针对双可再生能源融合发电模式的诸多技术难题,提出了一种在水电站大坝上建设太阳能电站并进行融合发电的创新模式,重点突破了水电与太阳能发电共享型控制技术、光伏逆变谐波抑制技术、无功补偿和共享型直流技术等技术难题。水电和太阳能发电共享型控制技术实现了水电现地控制单元、太阳能现地控制单元、共享型公用现地控制单元的分布式构架;实现了光伏对水电的逆变谐波抑制和无功补偿装置的研发;实现了太阳直流技术补偿水电站直流系统。应用实践表明,太阳能与水能融合发电模式可节约投资、增加无功补偿效益、减少国土资源的占用,是双可再生能源融合发电的创新性应用,具有很好的推广价值。 相似文献
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Energy storage is often seen as necessary for the electric utility systems with large amounts of solar or wind power generation to compensate for the inability to schedule these facilities to match power demand. This study looks at the potential to use building thermal energy storage as a load shifting technology rather than traditional electric energy storage. Analyses are conducted using hourly electric load, temperature, wind speed, and solar radiation data for a 5-state central U.S. region in conjunction with simple computer simulations and economic models to evaluate the economic benefit of distributed building thermal energy storage (TES). The value of the TES is investigated as wind and solar power generation penetration increases. In addition, building side and smart grid enabled utility side storage management strategies are explored and compared. For a relative point of comparison, batteries are simulated and compared to TES. It is found that cooling TES value remains approximately constant as wind penetration increases, but generally decreases with increasing solar penetration. It is also clearly shown that the storage management strategy is vitally important to the economic value of TES; utility side operating methods perform with at least 75% greater value as compared to building side management strategies. In addition, TES compares fairly well against batteries, obtaining nearly 90% of the battery value in the base case; this result is significant considering TES can only impact building thermal loads, whereas batteries can impact any electrical load. Surprisingly, the value of energy storage does not increase substantially with increased wind and solar penetration and in some cases it decreases. This result is true for both TES and batteries and suggests that the tie between load shifting energy storage and renewable electric power generation may not be nearly as strong as typically thought. 相似文献
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为了探讨研究太阳能发电技术在新农村建设中的应用前景,本文以安徽省马鞍山市博望镇三杨村为研究对象,通过问卷调查和实地调研方法对该村的能源消费和建筑能耗等情况进行了解,并以太阳能光伏发电技术中的LED路灯照明系统为例,将新型太阳能LED路灯和传统高压钠灯系统在造价成本和节能减排等方面进行比较分析.结果表明:在造价成本方面,... 相似文献
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中国燃料电池发电技术展望 总被引:1,自引:0,他引:1
本文主要叙述了我国后续能源领域中燃料电池发电技术的发展利用现状和技术展望,特别在文中提出燃料电池发电技术的发展必须要与其它新能源、新材料技术的发展相结合,例如:利用太阳能、风能从空气中提取纯水,从纯水中电解制氢,海水淡化制取纯水技术,以用生物方法从植物废弃物中制取的乙醇作为燃料电池的燃料,这些技术在我国未来能源应用领域具有广泛的潜在市场。同时简单概括了燃料电池发电技术能够大规模应用需考虑的几个关键性问题和我国燃料电池发电商业化的可行性及应用前景。 相似文献
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中国燃煤发电节能技术的发展及前景 总被引:2,自引:0,他引:2
我国一次能源结构决定了发电以煤电为主的基本格局,当前国内火力发电行业需要解决的两大突出问题是高能耗和严重的环境污染。2009年全国发电机组平均供电煤耗341g/(kW.h),高于330g/(kW.h)的国际平均水平。大力发展新型高效节能性火力发电技术,对进一步提高我国火力发电机组的发电效率,减少燃煤大气污染物排放具有十分重要的意义。发达国家正积极发展更高参数的超超临界火力发电技术(600℃/700℃),我国也把"超(超)临界燃煤发电技术"列入"863计划"。可以预见,在我国近中期电力事业的发展中,会把发展更高参数的超临界技术作为火电建设的主要方向。IGCC发电技术是未来煤炭能源系统的基础,被公认为是世界上最清洁的燃煤发电技术。随着煤气化技术和燃气轮机技术的不断发展和进步,IGCC将朝着大容量、高效率、低排放的方向发展。大型直接空冷发电技术是解决我国西北部富煤贫水地区火力发电的有效手段,以2×600MW机组为例,空冷机组比湿冷机组节水约80%左右。通过对火力发电机组各系统的集成与优化,可在现有超超临界机组技术不变的情况下,最大限度地利用余热回收,提高整个机组的发电效率,从而降低煤耗,实现机组在运行过程中的节能。 相似文献
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基于清洁能源发电系统的微网技术 总被引:7,自引:0,他引:7
清洁能源发电系统联网对于缓解传统电网供电压力,改变能源结构具有重要作用。通过分析以清洁能源发电为主的分布式电源大量联网的局限性,引入了微网技术,介绍了微网的相关概念及其基本结构、三种微网的基本控制模式:恒功率控制、考虑分布式电源功率限制的功率控制和联合最优功率控制.最后提出了微网研究中需要重点解决的问题。 相似文献
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生物质能除了可以在改善世界一次能源结构、降低化石能源需求量方面做出重要贡献以外,还可在减少温室气体排放、保障能源供应安全、改善贸易平衡、促进农村发展和改进城市废弃物处理方式等方面发挥作用。目前全球每年一次能源消费总量为500EJ,生物质资源的年用量约占一次能源消费总量的10%左右,主要被用于传统的民用燃料和生产第一代生物燃料。第二代生物燃料技术预计将于2020年前后在一些国家实现工业化生产。IEA预测,2050年世界一次能源需求量为670EJ,生物质资源将占一次能源需求总量的20%左右。各方学者预测的2050年全球生物质资源量最低值基本在200~400EJ之间,最高值在400~1500EJ之间。中国的生物燃料产业尚处于起步阶段,不过应该说取得了良好的开端。我国生物质资源相对较少,且分布不均,发展生物质能产品需要依靠能源作物。只有通过合理开发、有效利用,才能在不与粮食和食用油争夺土地的前提下,在一定程度上提供生物运输燃料和生物质发电供热所需的原料,生物质能-农产品和/或生物质能-林产品联合生产系统应成为主要发展方向。美国生物燃料产业的发展模式对我国具有一定的借鉴意义。生物质最有效的利用方式是生产运输燃料,从长远来看,生物燃料可以与石油燃料竞争,尤其是喷气燃料和汽油更具替代优势,但受到生物质资源供应量的制约。 相似文献
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《International Journal of Hydrogen Energy》2022,47(62):26515-26536
In this study, zero energy building (ZEB) with four occupants in the capital and most populated city of Iran as one of the biggest greenhouse gas producers is simulated and designed to reduce Iran's greenhouse emissions. Due to the benefits of hydrogen energy and its usages, it is used as the primary energy storage of this building. Also, the thermal comfort of occupants is evaluated using the Fanger model, and domestic hot water consumption is supplied. Using hydrogen energy as energy storage of an off-grid zero energy building in Iran by considering occupant thermal comfort using the fanger model has been presented for the first time in this study. The contribution of electrolyzer and fuel cell in supplying domestic hot water is shown. For this simulation, Trnsys software is used. Using Trnsys software, the transient performance of mentioned ZEB is evaluated in a year. PV panels are used for supplying electricity consumption of the building. Excess produced electricity is converted to hydrogen and stored in the hydrogen tank when a lack of sunrays exists and electricity is required. An evacuated tube solar collector is used to produce hot water. The produced hot water will be stored in the hot water tank. For supplying the cooling load, hot water fired water-cooled absorption chiller is used. Also, a fan coil with hot water circulation and humidifier are used for heating and humidifying the building. Domestic hot water consumption of the occupants is supplied using stored hot water and rejected heat of fuel cell and the electrolyzer. The thermal comfort of occupants is evaluated using the Fanger model with MATLAB software. Results show that using 64 m2 PV panel power consumption of the building is supplied without a power outage, and final hydrogen pressure tank will be higher than its initial and building will be zero energy. Required hot water of the building is provided with 75 m2 evacuated tube solar collector. The HVAC system of the building provided thermal comfort during a year. The monthly average of occupant predicted mean vote (PMV) is between ?0.4 and 0.4. Their predicted percentage of dissatisfaction (PPD) is lower than 13%. Also, supplied domestic hot water (DHW) always has a temperature of 50 °C, which is a setpoint temperature of DHW. Finally, it can be concluded that using the building's rooftop area can be transformed to ZEB and reduce a significant amount of greenhouse emissions of Iran. Also, it can be concluded that fuel cell rejected heat, unlike electrolyzer, can significantly contribute to supplying domestic hot water requirements. Rejected heat of electrolyzer for heating domestic water can be ignored. 相似文献