Coproduction System of Steel and Chemicals Using Latent-Heat Transportation

This paper describes the feasibility of the latent heat transportation system using Phase Change Material (PCM) to recover waste heat at high temperature over 300℃ in the steelworks and to supply it to distillation tower of BTX. Candidates of PCM for the system were determined experimentally. Moreover, the proposed system was theoretically analyzed from three viewpoints-energy requirement, exergy loss and CO_2 emissions and compared to the conventional heat supply system under reasonable assumptions. As a result, binary eutectic mixtures of NaOH-Na_2CO_3 was the best PCM candidate for the system from phase change point, latent heat and cost. The system analysis shows comparing the latent heat transportation system using binary eutectic mixtures of NaOH-Na_2CO_3 as PCM with the conventional system without heat recovery, the proposed system has only 8.6% in energy requirement, 37.5% in exergy loss and 19.7% in CO_2 emission. The results appealed a new possibility of heat transportation between different industries using PCM for high temperature application.会議情報 主催: 社団法人 日本エネルギー学会 後援: 独立行政法人 新エネルギー・産業技術総合開発機構 会議名: 第18回日本エネルギー学会大会 開催地: 札幌コンベンションセンター 開催日: 2009/07/30 - 2009/07/3