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。

基于等效热降理论,针对叠置机组热力系统的特殊性，提出了叠置电厂中压机组的功量指标转换系数ξ和热量指标转换系数ф，利用这2个转换系数能简捷、快速地定量分析叠置机组热力系统变化对机组的经济指标的影响，进而得出了叠置电厂热力系统局部定量分析的数学模型。该模型的概念清晰!结果准确、计算方法与中压机组类型无关，并通过实例验证了定量分析模型的正确性和可行性，从而形成了叠置机组的热力系统的局部定量方法。

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。

根据质量、动量、能量守恒方程建立了变截面通道内超音速汽液两相流升压装置的极限升压能力计算数学模型。计算及研究表明：极限升压能力随变截面混合腔喉部直径、被升压的低压水流量和蒸汽喷嘴压比增加而降低，随环形水喷嘴间隙的变化出现了最小值；计算得出变截面超音速汽液两相流装置的极限升压能力可达26；在设计升压装置时应尽可能选取较大的蒸汽喷嘴压比和较小的环形水喷嘴间隙。同时给出了变截面混合腔喉部直径的设计原则。研究结果对变截面通道内超音速汽液两相流升压技术的应用有重要意义。

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