Maximizing work of finite-potential-reservoir isothermal-chemical-engines with generalized models of bypass-mass-leakage and mass-resistance

IF 3 3区工程技术 Q2 CHEMISTRY, ANALYTICAL

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-10-01 DOI:10.1007/s10973-024-13603-9

Lingen Chen, Shaojun Xia, Shuangshuang Shi

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Abstract

Finite-potential-source (FPS) is a feature of isothermal-chemical-engine (ICE) cycle. Model of irreversible FPS iICE with generalized models of bypass-mass-leakage (BML) and mass-resistance is built. Mathematical conditions corresponding to maximum-work-output (MWO) of ICE are deduced using averaged-optimal-control method. Effects of FPS potential capacity characteristic, BML and mass-transfer laws on optimal-cycle-configurations (OCCs) are analyzed. Results obtained include eight special cases, and indicate that: Key component potential-difference between FPS and working-fluid is a constant with MWO objective for endoreversible FPS ICE with linear mass-transfer law (MTL); Ratio of square of difference of concentration of key-component (CKC) between FPS and working-fluid of ICE to CKC in working-fluid is constant with MWO objective for endoreversible FPS ICE with Fick’s diffusive MTL; Optimal CKC relations between FPS and working-fluid with MWO objective for irreversible FPS ICE with BML and mass-resistance are different from those with MWO objective for endoreversible FPS ICE with mass-resistance significantly; Optimal power-second law efficiency relation curves for endoreversible FPS and infinite-potential-source ICEs with mass-resistance are parabolic-type ones, while those for irreversible FPS and infinite-potential-source ICEs with BML and mass-resistance are loop-shaped ones.

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利用旁路-质量泄漏和质量阻力的通用模型最大化有限势储层等温-化学发动机的功耗

有限势能源（FPS）是等温化学发动机（ICE）循环的一个特征。通过旁路-质量泄漏（BML）和质量电阻的广义模型，建立了不可逆 FPS iICE 模型。使用平均最优控制方法推导出了与内燃机最大工作输出（MWO）相对应的数学条件。分析了 FPS 潜在容量特性、BML 和质量传输定律对最佳循环配置 (OCC) 的影响。分析结果包括八个特例，并表明对于采用线性传质定律（MTL）的内可逆 FPS ICE，FPS 和工作流体之间的关键组分电位差是 MWO 目标的常数；对于采用菲克扩散 MTL 的内可逆 FPS ICE，FPS 和 ICE 工作流体之间的关键组分浓度差（CKC）的平方与工作流体中的 CKC 之比是 MWO 目标的常数；对于具有 BML 和质量阻力的不可逆 FPS ICE，以 MWO 为目标的 FPS 与工作流体之间的最佳 CKC 关系与具有质量阻力的内可逆 FPS ICE 以 MWO 为目标的 CKC 关系有明显不同；对于具有质量阻力的内可逆 FPS 和无穷势源 ICE，其最佳幂秒定律效率关系曲线为抛物线型曲线，而对于具有 BML 和质量阻力的不可逆 FPS 和无穷势源 ICE，其最佳幂秒定律效率关系曲线为环形曲线。

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来源期刊

Journal of Thermal Analysis and Calorimetry 化学-分析化学

CiteScore

8.50

自引率

9.10%

发文量

577

审稿时长

3.8 months

期刊介绍： Journal of Thermal Analysis and Calorimetry is a fully peer reviewed journal publishing high quality papers covering all aspects of thermal analysis, calorimetry, and experimental thermodynamics. The journal publishes regular and special issues in twelve issues every year. The following types of papers are published: Original Research Papers, Short Communications, Reviews, Modern Instruments, Events and Book reviews. The subjects covered are: thermogravimetry, derivative thermogravimetry, differential thermal analysis, thermodilatometry, differential scanning calorimetry of all types, non-scanning calorimetry of all types, thermometry, evolved gas analysis, thermomechanical analysis, emanation thermal analysis, thermal conductivity, multiple techniques, and miscellaneous thermal methods (including the combination of the thermal method with various instrumental techniques), theory and instrumentation for thermal analysis and calorimetry.