The objective of this work is to analyze the performance of steam-driven jet injector for its design and application in the district-heating system. The paper experimentally studied the performance of a steam-driven jet injector with central steam nozzle configuration. Three injectors with throat diameters of 16 and 20mm were tested. The main inlet parameters tested-steam pressure, water pressure and water temperature-were in the range of 0.20-0.60MPa, 0.14-0.49MPa and 18-68C, respectively. Experimental results show that the pressures were almost constant for the steam-water two-phase flow in the variable section channel of the mixing chamber tested, whose values were mainly affected by inlet steam pressure, inlet water pressure and temperature, and a shockwave appeared at the outlet of the mixing chamber. The lifting-pressure coefficient and jet coefficient measured were 1.27-2.1 and 7.63-43.65, respectively. A simplified mathematical model has been developed to predict the performance of the injector based on conservation of mass, momentum and energy as well as the present experimental data. The predictions agreed with the experimental data within

针对热电联产压水堆核电机组采用新蒸汽再热和对外供应两种不等价的能量——热能和电能的特点，利用二回路热力系统回热加热器抽汽效率和等效热降理论，通过理论分析和数学推导，建立了热电联产压水堆二回路热力系统局部变化的经济性定量计算数学模型，进而研究了各种供热抽汽返回水方式对经济性影响的诊断模型，旨在形成一套概念清晰、计算简捷、使用方便的热电联产压水堆核电机组二回路热力系统的经济性定量诊断方法。最后通过2个实例计算证明了该理论模型和诊断方法的准确、可靠、简捷性。该研究结果对压水堆核电机组二回路热力系统节能和优化设计具有重要意义。

提出了一种热电厂负荷分配的新方法——将供热机组的热耗分解为热化发电部分和凝汽发电部分，从而将热电厂负荷的分配简化成为热负荷和电负荷两种相对独立的分配。并给出了该分配方法的具体内容和应用实例。

利用加热单元和单元进水系数的概念，经过详细的理论分析和数学推导，提出了压水堆二回路各级抽汽的热功转换系数，利用该系数得出了压水堆二回路的热力系统经济性诊断的定量数学模型，并通过实例计算验证了本文所提出方法的准确性

该文针对二次再热超临界机组采用了二次再热和高低压加热器叫热抽汽均设有外置蒸汽冷却器进行过热度跨级利用的特点，基于等热降理论，经过严格的理论分析和数学推导，得出了加热器名义和真实抽汽等效热降及抽汽效率的计算方法．给出了二次冉热超临界机热力系统经济性的局部定量分析法则，形成了一套完整的经济性定量计算方法。利用该模型仪用3个公式即可以方便、快捷、准确地计算山热力系统发生局部调整和变化时机组经济性指标的变化，为此类机组的经济分析和节能诊断提供了一种简捷、准确的定量方法。并通过实例计算验证了该模型的可行性和准确性