文章摘要
郭向吉,张升升,张博,李玲.采用涡流管和喷射器的新型LNG汽化加热系统[J].,2019,59(2):131-138
采用涡流管和喷射器的新型LNG汽化加热系统
Novel heating systems for LNG regasification with vortex tube and ejector
  
DOI:10.7511/dllgxb201902004
中文关键词: LNG汽化  空温式汽化器  涡流管  喷射器  节能
英文关键词: LNG regasification  ambient air vaporizer  vortex tube  ejector  energy saving
基金项目:国家自然科学基金资助项目(51876020);大连市科技创新基金资助项目(2018J12SN073).
作者单位
郭向吉,张升升,张博,李玲  
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中文摘要:
      首次提出了两种新型空气源热泵,核心部件包括涡流管、喷射器和空温式换热器,用于从低温环境中吸收热量.该空气源热泵取代了传统LNG汽化过程中水浴加热器的位置,吸收到的热量可用于补偿从空温式汽化器吸热后温度仍不达标的天然气,以达到降低甚至无须水浴加热器耗能的目的.在这两种新型加热系统中,其主要原理是气体在涡流管冷端温度降低,使得天然气可以在空温式换热器中继续从环境吸收热量.除了给出详细的系统描述之外,还建立了数学定量模型,并设定了具体工况,对两种加热系统的性能、能耗和相对于传统加热系统的节能比进行了计算和分析.结果表明,当气体升温要求在5~30 ℃时,不带有喷射器的加热系统节能比在50%以上,而带有喷射器的加热系统节能比可在90%以上.
英文摘要:
      Two novel air-source heat pumps, mainly consisting of vortex tube, ejector and ambient air heat exchanger, are proposed to absorb heat from low-temperature environment. Such heating system will be supplemented to the LNG regasification process, taking the place of water-bath heater, to minimize electricity or natural gas consumption. In these two novel heating systems, due to the gas temperature drop at the cold end of the vortex tube, the natural gas can continue absorbing heat from the environment in the ambient air heat exchanger. In addition to giving a detailed description of the system, a mathematical quantitative model is also established. Through setting specific working conditions, the performance of the two heating systems, energy consumption and energy saving ratio relative to the traditional heating system are calculated and analyzed.The results show that when the gas temperature requirement is between 5 ℃ and 30 ℃, the energy saving ratio of the heating system without ejector is above 50%, while that of the heating system with ejector is above 90%.
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