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Hybrid operating method to improve the part-load performance of gas turbine based combined cooling and power system

机译：混合动力操作方法，提高燃气轮机组合冷却电力系统配件负载性能

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摘要

Frequent partial load operation caused by fluctuating users' demands is one of the main factors suppressing energy-saving performance of combined cooling and power systems. In order to address this lingering problem, three different operating strategies, namely, inlet guide vanes, inlet air throttling and turbine inlet temperature, are compared and adopted to alter gas turbine characteristic in order to promote the energy-saving performance of the combined cooling and power system under partial loads. The combined cooling and power system consists of a gas turbine coupled to a double-effect absorption chiller. Two insufficient cooling energy compensation modes including self-compensation and grid-compensation are also introduced to further potentially enhance the system's performance. Key results have revealed that the inlet guide vanes operating strategy is the best option for the system and the self-compensation mode can reap more energy savings for high cooling to power ratio demands under partial load conditions. From the system side perspective, the inlet guide vanes operating strategy is able to improve 4.06% and 4.97% primary energy saving rate respectively compared to the existed inlet air throttling and turbine inlet temperature operating strategies at 50% gas turbine load. Considering the users' demands, the inlet guide vanes operating strategy incorporating self-compensation mode improves the average primary energy saving rate of 5.81% in the typical summer day and 7.20% in typical winter day in comparison to other existed operating methods.
机译：通过波动用户需求引起的频繁部分负载操作是抑制组合冷却和电力系统的节能性能的主要因素之一。为了解决这一挥之不去的问题，比较三种不同的操作策略，即入口导向叶片，入口空气节流和涡轮机入口温度，以改变燃气轮机特性，以促进组合冷却的节能性能部分负载下的电力系统。组合的冷却和电力系统包括耦合到双效吸收冷却器的燃气轮机组成。还引入了两个不足的冷却能量补偿模式，包括自我补偿和网格补偿，以进一步潜在地提高系统的性能。关键结果表明，入口导向叶片操作策略是系统的最佳选择，自补偿模式可以在局部负荷条件下获得高冷却的高冷却能量的节能。从系统侧的角度来看，与存在的入口空气节流和涡轮机入口温度运行策略相比，入口导向器操作策略分别能够提高4.06％和4.97％的初级节能率。考虑到用户的需求，加入自我补偿模式的入口导向叶片操作策略可提高典型的夏季的平均初级节能率为5.81％，与其他存在的操作方法相比，典型的冬季日内在7.20％。

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