Techno-economic analysis of the thermal energy saving options for high-voltage direct current interconnectors
Techno-economic analysis of the thermal energy saving options for high-voltage direct current interconnectors
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DOI：
10.1016/j.apenergy.2019.04.003
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发表时间：
2019-08
期刊：
影响因子：
11.2
通讯作者：
A. Giampieri;Zhiwei Ma;Janie Ling Chin;A. Smallbone;P. Lyons;Imad Khan;Stephen Hemphill;A. Roskilly
中科院分区：
文献类型：
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作者：
A. Giampieri;Zhiwei Ma;Janie Ling Chin;A. Smallbone;P. Lyons;Imad Khan;Stephen Hemphill;A. Roskilly
由于效率和经济原因，高压直流互联站越来越多地用于世界各地的长途电力传输。识别和评估适合回收和再利用的具有成本效益的废热源是一个机会，可以提高高压直流电站的效率，从而显著节省能源消耗并减少碳足迹。本文是第一次调查的技术和经济可行性的热回收在一个主要的互联电站。一旦确定了潜在的可回收热源，并评估了热能回收技术的最新进展，两个潜在的热回收策略进行了技术和经济分析。虽然热电转换技术被证明在技术上可行但在经济上不可行，但液体干燥剂和蒸发冷却热回收组合策略的实现被证明具有最佳的经济性能，投资回收期约为5年，节省能源的平均成本为0.155 €/kWh，具体取决于热回收和系统的大小。对于位于炎热和潮湿气候中的高压直流电站，可以获得额外的经济节省，其中液体干燥剂技术的除湿能力可能特别有利。
High-voltage direct current interconnection stations are increasingly used for long-distance electricity transport worldwide, due to efficiency and economic reasons. The identification and evaluation of cost-effective waste heat sources appropriate for recovery and reutilisation represent an opportunity that can improve the efficiency of high-voltage direct current stations, resulting in significant savings in energy consumption and reduction of the carbon footprint. The paper is the first to investigate the technological and economic feasibility of heat recovery at a major interconnector power station. Once identified the potential recoverable heat sources and evaluated the latest advancements in thermal energy recovery technology, a technological and economic analysis of two potential heat recovery strategies has been performed. While the heat-to-electricity technology was proved to be technologically but not economically feasible, the realisation of a combined liquid desiccant and evaporative cooling heat recovery strategy was proved to present the best economic performance with a payback period of about 5 years and a levelised cost of saved energy of 0.155 €/kWh, depending on the heat recovery and size of the system. Additional economic savings can be obtained for high-voltage direct current stations located in hot and humid climates, where the moisture removal ability of liquid desiccant technology could be particularly advantageous.