【摘要】 设计了以微型燃气轮机为核心的冷热电联供系统并建立了该系统变工况性能分析模型。结合具体算例,对该联供系统在采用"以冷(热)定电"的模式下运行变工况时的热力性能进行了计算分析,揭示了系统在不同调节方式下的变工况性能。结果表明,回热度调节具有较宽的冷热负荷调节范围,因此微型燃气轮机联供系统特别适用于冷热负荷变化大而系统内电负荷较稳定的场合。为使系统变工况时保持较高的性能,当冷热负荷增加时应优先考虑发电功率调节,其次采用回热度调节,最后采取补燃量调节;当冷热负荷减小时宜采用相反的调节顺序。研究结果将对微型燃气轮机冷热电联供系统的设计及运行提供有益的参考和指导。更多还原

【Abstract】 A micro gas turbine-based combined cooling,heating and power (CCHP) cogeneration system has been designed and a model for analyzing the off-design performance of the system,established.In combination with specific calculation cases,an analytic computation has been performed of the thermodynamic performance of the system in question operating at an off-design condition under the mode of "determining power generation on the basis of heating (cooling) demand",thus revealing the off-design operating performance of the system under various regulating methods.It has been found that a recuperation adjustment can accommodate a relatively wide range of cooling and heating load regulation.Therefore,the micro gas turbine-based cogeneration system is particularly suitable for the occasion when the cooling and heating load undergoes a great change while the electric power load in the system is relatively stable.To keep a comparatively high performance of the system when operating at off-design conditions,in case of an increase of the cooling and heating load,the electric power regulation should be adopted as a first priority,followed by the recuperation regulation as a second choice and supplementary firing regulation as a last resort.When the cooling and heating load decreases,a reverse regulation order should be chosen.The research results can well provide useful reference and guidance for the design and operation of micro gas turbine-based CCHP cogeneration systems.更多还原