提出一种带吸收器的混合工质低温动力循环，LNG和海水分别为冷源和热源。以单位LNG输出功和可用能利用率为性能参数对循环进行计算，并对采用四氟甲烷（CF4）／丙烷（C3H8）和乙烯（C2H4）／丙烷（C3H8）新型混合工质循环与常规丙烷朗肯循环（ORC）进行比较。结果表明，本循环明显优于常规丙烷朗肯循环，单位输出功和最大可用能利用率分别比朗肯循环提高了66．3％和79．6％，最佳LNG利用温度分别为-59．6℃和-54．6℃。
A novel cryogenic cycle by using a binary mixture as working fluid and combined with a vapor absorption process, to improve the energy recovery efficiency of a LNG cold power generation, was proposed. The cycle with seawater as the heat source and LNG as the heat sink was simulated, and tile optimization of the power generated per unit LNG and the availability efficiency were performed. Tetrafluoromethane (CF4) propane (C3Hs) working pair and ethylene (C2H4) propane (C3Hs) working pair wcrc employed as the working fluid. The presented cycle with two working pairs had been compared with Calls Organic Rankine Cycle (ORC), to shown the performance improvement. It is shown that the novel cycle is considerably superior to the ORC. The efficiencies are increased by 66.3% and 79.6% and the optimized LNG recovery temperatures are -59.6℃ and -54.6℃.
参考文献
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