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为探索经济、高效的利用弃风供热和热电厂循环水余热的深度利用,实现节能减排效益最大化,依据能量梯级利用原理,提出一种耦合弃风和循环水余热的供热系统。该系统以压缩式热泵为核心,将电网与热网两大能量输送通道有机结合起来,以热泵消耗的电能和回收的循环水余热替代城镇热网中的燃煤锅炉供热,同时压缩式热泵耗电也为风电上网腾出等量的电能输送空间。模拟分析结果表明:该供热系统可以实现热电厂循环水余热100%回收利用,提高热电厂供热能力30%,实现风电弃风远距离、大面积、集中供热;该系统每消纳1 Mw·h弃风电量可节约标煤约0.7 t,是蓄热电锅炉弃风供热方案节能量的4倍左右,同时可节约水资源3.64 t;供热电费成本为常规方案的20%～30%,是一种较为理想的利用弃风供热方式。
In order to explore the economical and efficient use of abandoned wind and heat treatment plant circulating water, the depth of utilization of waste heat to maximize the benefits of energy-saving emission reduction, according to the energy cascade utilization principle, proposed a combination of waste heat and circulating water heating system. The system uses compression heat pump as the core, the power grid and the heat network two energy transmission channels organic combination of energy consumption by the heat pump and recycled water recycling heat instead of urban heating network in the coal-fired boiler heating, while the compression heat pump Power consumption also frees up the same amount of power transmission space for wind power. The simulation results show that the system can realize 100% recovery and utilization of waste heat of circulating water in thermal power plants, increase the heating capacity of thermal power plants by 30%, and realize long-distance, large-area and central heating of wind farms. h can save about 0.7 t of standard coal, which is about 4 times of energy saving of waste heat supply plan of regenerative electric boiler and save 3.64 t of water resources at the same time. The cost of heating electricity is 20% -30% of that of conventional scheme, Is a more ideal use of abandoned wind heating.