Energy saving during the partial heat load period by integrating a steam-heated absorption heat pump into the thermal scheme of a PT-60/70-130/13 steam turbine

Q3 Earth and Planetary Sciences
Aleksandr Shubenko, M. Babak, Aleksandr Senetskyi, Yana Forkun
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Abstract

The task of determining the efficiency of operation of an absorption heat pump (AHP) with steam heating (COP conversion factor = 1.71) integrated into the thermal circuit of a PT-60/70-130/13 steam turbine that releases production steam and hot water during the partial heat load period (spring and autumn; also referred to as the inteheating period) is being solved in this paper. Variants of operation of the PT-60/70-130/13 with an integrated AHP with a capacity of ~17.25 MW in the partial heat load period were studied when steam with parameters of 1.296 MPa, 280°C was realised in the production selection of the adjustable turbine at flow rates of 20, 30, and 50 t/h with a variable heat load on hot water supply, which was determined by the return network water consumption task 1000–1400 t/h, while the ‘useful’ electrical power of the power complex was provided at ~30 MW. At electricity prices of 0.13 USD/(kWh) and standard fuel of 309 USD/t for Ukraine, the simple payback period of 17.25 MW AHP as part of the PT-60/70-130/13 steam turbine for the partial heat load period at a production load of 20–50 t/h of steam at the consumption of return network water of heat supply 1000–1200 t/h can decrease to two years. At the same time, during the partial heat load period, which lasts ~4404 hours in Ukraine, up to ~1.2% of fuel, up to 44% of technical water for feeding the circulation cooling system, and 0.4% of softened water for feeding are saved. A tangible environmental effect is achieved due to the reduction of harmful emissions – actual heat and hazardous gases – to the atmosphere: CO2 by 1118.7 tons, NOx by 5.87 t, thus saving ~41,000 of technical water.
将蒸汽加热吸收式热泵纳入 PT-60/70-130/13 型蒸汽轮机的热力方案,在部分热负荷期间节约能源
本文的任务是确定在 PT-60/70-130/13 型汽轮机的热力回路中集成的蒸汽加热吸收式热泵 (AHP) 的运行效率(COP 换算系数 = 1.71),该热泵在部分热负荷期(春季和秋季,也称为保温期)释放生产蒸汽和热水。当参数为 1.296 兆帕、280 摄氏度的蒸汽在流量为 20、30 和 50 吨/小时的可调式汽轮机生产选择中实现时,研究了 PT-60/70-130/13 型汽轮机在部分热负荷期的各种运行方式,该汽轮机集成了功率为约 17.25 兆瓦的自动水力压 缩机,热水供应的热负荷可变,由 1000-1400 吨/小时的回水网耗水量决定,同时电力综合体的 "有用 "电功率为约 30 兆瓦。按照乌克兰 0.13 美元/(千瓦时)的电价和 309 美元/吨的标准燃料价格计算,17.25 兆瓦 AHP 作为 PT-60/70-130/13 型汽轮机的一部分,在部分热负荷期间,蒸汽生产负荷为 20-50 吨/小时,供热回水消耗量为 1000-1200 吨/小时,其简单投资回收期可缩短至两年。同时,在乌克兰持续约 4404 小时的部分热负荷期间,可节省约 1.2% 的燃料、44% 的循环冷却系统给水和 0.4% 的给水软化水。由于减少了向大气排放的有害气体(实际热量和有害气体),因此取得了显著的环保效果:二氧化碳减少了 1118.7 吨,氮氧化物减少了 5.87 吨,从而节约了约 41,000 吨技术用水。
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来源期刊
Energetika
Energetika Energy-Energy Engineering and Power Technology
CiteScore
2.10
自引率
0.00%
发文量
0
期刊介绍: The journal publishes original scientific, review and problem papers in the following fields: power engineering economics, modelling of energy systems, their management and optimi­zation, target systems, environmental impacts of power engi­neering objects, nuclear energetics, its safety, radioactive waste disposal, renewable power sources, power engineering metro­logy, thermal physics, aerohydrodynamics, plasma technologies, combustion processes, hydrogen energetics, material studies and technologies, hydrology, hydroenergetics. All papers are re­viewed. Information is presented on the defended theses, vari­ous conferences, reviews, etc.
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