内可逆四热源吸收式热变换器的基本优化关系及其性能分析

应用内可逆四热源吸收式热变化器循环模型，分析热变换器受传热不可逆性影响时的基本性能。导出了牛顿传热定律下循环的比泵热率和泵热系数的基本优化关系以及工质的最佳工作温度和传热面积的最佳分配关系。由此讨论了循环的各种优化性能，并通过数值算例，得出循环参数对循环特性的影响规律。所得结果对实际四热源吸收式热变换器的优化设计具有一定指导意义。     

热阻和非理想回热对铁电埃里克森制冷循环的Yong经济优化性能的影响

应用有限时间Yong分析法，研究热阻和非理想回热对铁电埃里克森制冷循环的Yong经济优化性能的影响。基于铁电晶体的热力学特性，考虑线性传热规律，得到铁电埃里克森制冷循环的基本优化关系及其他性能参数，所得结论可为铁电埃里克森制冷循环的优化设计和性能改善提供些指导。     

内可逆正反向两热源循环复杂传热规律下的优化关系

考虑内可逆正反向两热源循环中工质与热源之间的传热服从复杂规律q∝(△Tn)m(包括了牛顿传热规律、线性唯象传热规律、辐射传热规律、Dulong-Petit传热规律、广义对流传热规律和广义辐射传热规律),导出内可逆卡诺热机功率与效率、内可逆卡诺制冷机制冷率与制冷系数和内可逆卡诺热泵供热率与供热系数间的基本优化关系特性.该文结果具有一定普适性和包容性,对实际热机、制冷机和热泵的设计工作有一定理论指导作用.     

四热源吸收式热泵的传热面积优化

建立一种不可逆的四温度位吸收式热泵模型，导出其最小传热面积与四热源熵变化率的关系并得到了热力学第二定律的类比表达式，获得了最佳供热率、性能系数和传热面积之间的优化关系，所得结论可为四热源吸收式热泵的优化设计和最佳工况选择提供新的理论途径。     

广义不可逆布雷逊热机的生态学性能优化

应用有限时间热力学方法和生态学优化准则对不可逆布雷逊热机循环的各种性能参数进行优化，导出了服从牛顿传热规律并考虑热阻、热漏和内不可逆性的布雷逊热机循环在生态学目标函数最大时输出功率和效率的表达式。讨论了热漏、内不可逆性对该热机各种性能参数的影响，同时还比较了最大输出功率和最大生态学目标函数下该热机各种优化性能参数间的关系。所得结果给实际热机的优化设计提供了理论依据。     

传热规律、热漏和内不可逆性对吸收式热泵循环性能的影响

建立了考虑泵热空间到环境热源的热漏、工质循环的内部不可逆性以及工质与热源之间传热Q∝△(T^a)服从传热规律时的不可逆四热源吸收式热泵循环模型，导出了循环泵热率和泵热系数的一般关系；并导出了线性唯象传热定律时循环泵热率和泵热系数的基本优化关系、性能极值、循环中工质的最佳工作温度和换热器传热面积的最佳分配关系；通过数值耸例分析了传热规律、热漏和内不可逆性对循环性能的影响规律，比较了传热面积最优分配前后循环的最优性能。     

板翅式回热器传热性能研究

对板翅式回热器的传热性能进行了实验和数值模拟，对板翅式回热器的传热性能以及其温度场和速度场的情况进行了分析，为今后的此种换热器的设计与改进提供了一定的理论依据。并且为研究板翅式气-气回热器在高温下的传热规律，分析参与换热两侧流体的传热特性，做出了初步探讨。     

热阻和非理想回热对铁电埃里克森制冷循环的(火用)经济优化性能的影响

应用有限时间炯分析法,研究热阻和非理想回热对铁电埃里克森制冷循环的炯经济优化性能的影响。基于铁电晶体的热力学特性,考虑线性传热规律,得到铁电埃里克森制冷循环的基本优化关系及其他性能参数,所得结论可为铁电埃里克森制冷循环的优化设计和性能改善提供些指导。     

类热机结构优化特征及其论证

在已有热机构形优化特性以及类热机装置的构形优化特性分析基础上，将类热机模型推广到一般的传输过程模型，通过变分法导出了一般传输过程的构形优化准则，证明了对于线性传输模型，在有限尺寸约束条件下，传输过程（或装置）熵产最小时，传递系数在区域内等分是其基本特征。同时介绍了传输过程的构形优化在类热机装置分析和广义热力学优化理论研究中的应用，初步验证了本文提出的构形优化特征，并简要阐述其应用发展方向。     

热管型吸附器的性能模拟及优化分析

针对一种热管型吸附器结构形式，对具有翅片的热管型吸附器内传热特性进行了数值模拟，并基于此对热管型吸附器的吸附制冷系统的性能进行了分析，此外讨论了热管的传热极限以及管外传热特性对吸附器的影响。     

一类不可逆卡诺热机最佳效率和功率间的关系

采用包括Ｄｕｌｏｎｇ－Ｐｅｔｉｔ非线性传热率和热漏的不可逆卡诺热机模型，导出其基本优化关系，并讨论了热机在最大输出功率时的效率问题。     

有限热源的热机供热率与效率关系的有限时间热力学分析

讨论了有限热源热机的供热率与效率关系。引人一种完善内可逆模型的方法，对高温热源侧与低温热源侧的传热优化问题进行了分析，得到一些新结论，它对太阳能热机、核动力装置和地热发电装置等热机设计均有一定指导意义。     

六缸柴油机冷却系统流动与传热的数值模拟研究

冷却水的流动与传热直接影响柴油机的冷却效率、高温零件的热负荷、整机的热量分配和能量利用。在冷却系统传热计算时，利用流固耦合的方法，较为准确地确定了缸体水套的传热边界条件。采用CFD商用软件STAR—CD对直列六缸柴油机的冷却系统的流动与传热进行三维数值模拟，给出了整机冷却水套内冷却液的流场、换热系数及压力场分布，为柴油机冷却水腔的优化设计提供了理论依据。     

Thermoeconomic analysis of a solar driven heat engine

Thermoeconomic optimization has been carried out for an endoreversible solar driven heat engine using finite-time/finite-size thermodynamic theory. In the considered heat engine model, heat transfer from the hot reservoir is assumed to be radiation mode and the heat transfer to the cold reservoir is assumed to be convection mode. The power output per unit total cost is taken as objective function and the optimum performance and design parameters have been investigated. The effects of the technical and economical parameters on the thermoeconomic performances have been also discussed.     

Parametric optimization of a solar-driven Braysson heat engine with variable heat capacity of the working fluid and radiation–convection heat losses

An irreversible solar-driven Braysson heat engine system is presented, in which the temperature-dependent heat capacity of the working fluid, the radiation–convection heat losses of the solar collector and the irreversibilities resulting from heat transfer and non-isentropic compression and expansion processes are taken into account. Based on the thermodynamic analysis method and the optimal control theory, the mathematical expression of the overall efficiency of the system is derived and the maximum overall efficiency is calculated, and the operating temperatures of the solar collector and the cyclic working fluid and the ratio of heat-transfer areas of the heat engine are optimized. By using numerical optimization technology, the influences of the variable heat capacity of the working fluid, the radiation–convection heat losses of the solar collector and the multi-irreversibilities on the performance characteristics of the solar-driven heat engine system are investigated and evaluated in detail. Moreover, it is expounded that the optimal performance and important parametric bounds of the irreversible solar-driven Braysson heat engine with the constant heat capacity of the working fluid and the irreversible solar-driven Carnot heat engine can be deduced from the conclusions in the present paper.     

线性唯象传热定律下广义不可逆卡诺热机的频率特性

以广义不可逆卡诺热机模型为研究对象,考虑工质与热源间传热服从线性唯象定律,研究热机性能与循环频率的关系.得到了不同于内可逆情况下的输出功率、效率以及可利用温差与循环频率和吸、放热时间比的关系式,通过数值计算,分析了热漏、内不可逆性的影响特点.结果表明,在任一循环吸、放热时间比下,存在一个最佳循环频率,使循环输出功率达到最大;存在热漏时,任一循环吸、放热时间比下,存在一个最佳循环频率,使循环效率达到最大.     

具有热阻_热漏和内不可逆性的联合热机性能

建立一类存在热阻、热漏和内不可逆性的定常态流联合热机循环模型,并研究其性能优化,导出功率、效率优化关系,最大功率及其相应效率,和最大效率及其相应功率。     

Performance optimization of a solar driven heat engine with finite-rate heat transfer

An optimal performance analysis for an equivalent Carnot-like cycle heat engine of a parabolic-trough direct-steam-generation solar driven Rankine cycle power plant at maximum power and maximum power density conditions is performed. Simultaneous radiation-convection and only radiation heat transfer mechanisms from solar concentrating collector, which is the high temperature thermal reservoir, are considered separately. Heat rejection to the low temperature thermal reservoir is assumed to be convection dominated. Irreversibilities are taken into account through the finite-rate heat transfer between the fixed temperature thermal reservoirs and the internally reversible heat engine. Comparisons proved that the performance of a solar driven Carnot-like heat engine at maximum power density conditions, which receives thermal energy by either radiation-convection or only radiation heat transfer mechanism and rejects its unavailable portion to surroundings by convective heat transfer through heat exchangers, has the characteristics of (1) a solar driven Carnot heat engine at maximum power conditions, having radiation heat transfer at high and convective heat transfer at low temperature heat exchangers respectively, as the allocation parameter takes small values, and of (2) a Carnot heat engine at maximum power density conditions, having convective heat transfer at both heat exchangers, as the allocation parameter takes large values. Comprehensive discussions on the effect of heat transfer mechanisms are provided.     

Effects of combined heat transfer on the thermo-economic performance of irreversible solar-driven heat engines

A thermo-economic performance analysis and optimization has been carried out for an irrversible solar-driven heat engine with losses due to heat transfer across finite temperature differences, heat leak and internal irreversibilities. In the considered heat engine model, heat transfer from the hot reservoir is assumed to be simultaneous radiation and convection mode and the heat transfer to the cold reservoir is assumed to be convection mode. The effects of the technical and economical parameters on the thermo-economic performance have been investigated in order to see the collective effects of the radiation and convection modes of heat transfer. Also the optimal performance parameters of the heat engine, such as the thermal efficiency, temperatures of the working fluid and the ratio of heat transfer areas have been discussed in detail.