Theoretical analysis of a wind heating conversion and long distance transmission system
Theoretical analysis of a wind heating conversion and long distance transmission system
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DOI：
10.1016/j.enconman.2017.01.021
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发表时间：
2017-04
影响因子：
10.4
通讯作者：
W. Cheng;B. Han;Yong-Le Nian;Binglong Han
中科院分区：
文献类型：
--
作者：
W. Cheng;B. Han;Yong-Le Nian;Binglong Han
风电作为一种清洁可再生能源，近年来得到了快速发展。随着风力发电比重的不断提高，风能的波动性和间歇性阻碍了国家电网的安全稳定运行，造成了削风和能源浪费，阻碍了中国风电产业的进一步发展。为了解决这一问题，人们提出了风热转换。然而，风电场与居民区之间的热能远距离传输是风热供暖亟待解决的问题。本文提出了一种新型的风热转换和远距离输电系统。该系统利用简单的风热转换装置，通过工质的潜热传递将热能输送到需要热的地方。建立了新型热水传输系统的模型，热力学分析表明，新型热水传输系统的最大传输距离可达240 mm，是典型热水传输系统的9.6倍。这种新型系统还可以通过大大减少泵的工作量和管径来降低成本。此外，当风功率密度从350亿瓦/平方米增加到650亿瓦/平方米时，效率和循环率几乎没有变化。
As a clean and renewable energy, wind power gets a rapid growth in recent years. With the increasing proportion of wind power generation, the fluctuation and intermittency of wind energy impedes the safe and stable operation of national power grids, which causes wind curtailment and energy waste, hindering further development of wind power industry in China. To solve this problem, wind heating conversion was proposed. However, long distance transmission between wind fields and residential areas for thermal energy is an urgent issue for wind heating. This paper presents a novel wind heating conversion and long distance transmission system. A simple device was utilized for wind heating conversion in the present system, then thermal energy was transported to heat demand site through latent heat transmission of the working fluids. A model of the novel system was built and thermodynamics analysis showed that maximum transmission distance of the novel system could extended to 240 km, 9.6 times of that of typical hot water transmission system. And the novel system also could cut down the cost by greatly reducing pump work and pipe diameter. In addition, efficiency and circulation ratio was almost unchanged while wind power density increased from 350 W/m2to 650 W/m2.