本文提出了一种新型微型燃气轮机分布式冷热电联供系统,集成了微型燃气轮机、氨水Rankine循环,单双效复合溴化锂吸收式制冷机,烟气热水换热器.氨水Rankine循环中,混合工质升温蒸发过程回收微燃机烟气余热,降温冷凝过程热量用于驱动吸收式制冷机.研究了新系统的热力性能、与没有集成氨水Rankine循环的典型微燃机分布式冷热电系统进行了对比分析,并对关键过程进行了能量品位(EUD)分析.热力性能结果表明,集成了氨水Rankine循环的新型系统热力性能优异,相对节能率为22.41％,炯效率为31.64％,新系统可以在不影响系统相对节能率的前提下调整系统的冷负荷(35.6～51 kW).能量品位分析表明,新系统性能提升的原因在于新系统氨水Rankine循环的吸热、放热过程与冷热源的能量品位差减小.
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