Efficient Heat Recovery from Hydrogen and Natural Gas Blend Combustion Products

IF 0.5 Q4 PHYSICS, APPLIED
D. Rusovs, L. Jansons, N. Zeltiņš, I. Geipele
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引用次数: 0

Abstract

Abstract The introduction of hydrogen and natural gas blends in existing gas transportation and distribution networks would ensure faster and more efficient decarbonization of energy sector, but, at the same time, this process would request solution of many practical and technical problems. This paper explores thermodynamics of hydrogen and natural gas blend combustion products and estimates the amount of condensate and latent energy recovery from flue gas as a function of condensing temperature. The efficient energy recovery depends on network return temperature, and it is possible to overcome this limitation by implementation of heat pump for extraction of low temperature heat from flue gases. The case study considers operation of heat only boiler and flue gas condenser with integrated cascade of heat pumps, which consist of absorption lithium bromide-water chiller (in heat pump mode) and vapour compression unit. Presented results of energy recovery hence are limited by data collected from the natural gas combustion for district heating network energy supply. However, previous thermodynamic consideration allows extending the obtained results for case of hydrogen and natural gas blend combustion. A proof of concept of heat recovery by combination of flue gas condenser supported by a cascade of heat pumps demonstrates the efficiency in case of hydrogen and natural gas blend combustion.
氢和天然气混合燃烧产物的高效热回收
摘要在现有的天然气运输和配送网络中引入氢气和天然气混合物将确保能源部门更快、更高效的脱碳,但与此同时,这一过程将需要解决许多实际和技术问题。本文探讨了氢气和天然气混合燃烧产物的热力学,并估计了冷凝液的量和烟气中的势能回收率与冷凝温度的关系。有效的能量回收取决于网络返回温度,并且可以通过实施用于从烟道气中提取低温热量的热泵来克服这一限制。案例研究考虑了具有集成级联热泵的纯热锅炉和烟气冷凝器的运行,该热泵由吸收式溴化锂冷水机组(热泵模式)和蒸汽压缩单元组成。因此,所提出的能源回收结果受到从用于区域供热网络能源供应的天然气燃烧中收集的数据的限制。然而,先前的热力学考虑允许将所获得的结果扩展到氢气和天然气混合燃烧的情况。由级联热泵支持的烟气冷凝器组合的热回收概念验证证明了氢气和天然气混合燃烧的效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.50
自引率
16.70%
发文量
41
审稿时长
5 weeks
期刊介绍: Latvian Journal of Physics and Technical Sciences (Latvijas Fizikas un Tehnisko Zinātņu Žurnāls) publishes experimental and theoretical papers containing results not published previously and review articles. Its scope includes Energy and Power, Energy Engineering, Energy Policy and Economics, Physical Sciences, Physics and Applied Physics in Engineering, Astronomy and Spectroscopy.
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