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Efficient Open Isobaric Expansion Based ThermalCycles at Low Temperatures

机译：低温下基于有效的等压膨胀的热循环

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The work aims to provide feasible structures for the open processes based thermal cycle as well as the regenerative open processes based thermal cycle characterised by rendering high thermal efficiency at low temperatures. Both cycles differ from the conventional Carnot-based thermal cycles (Carnot, Otto, Diesel, Rankine, Brayton, Stirling, Ericsson, and variants of these cycles) in that the conversion of heat to mechanical work is performed undergoing load reaction based path functions which means an isobaric expansion process at constant load in which thermal energy absorption and conversion to mechanical work are performed simultaneously along a single transformation of the cycle, contrary to what happens in conventional Carnot-based engines, in which mechanical work is delivered by means of a quasi-entropic expansion along a single transformation. Because of the mentioned differences these cycles do not obey the Carnot statement.A performance analysis of the OPTC and the ROPTC operating with hydrogen, helium, and nitrogen was carried out and the results were compared with those for a Carnot cycle operating under the same range of temperatures. High theoretical thermal efficiency was achieved for the ROPTC, surpassing the Carnot factor under favourable conditions. These results, obtained with a structurally simple and compact engine, pave the way for a new generation of power convertors.
机译：该工作旨在为基于开放过程的热循环以及基于再生开放过程的热循环提供可行的结构，其特征在于在低温下具有较高的热效率。两种循环都不同于传统的基于卡诺的热循环（卡诺，奥托，柴油，朗肯，布雷顿，斯特林，爱立信以及这些循环的变体），其中热到机械功的转换是通过基于负载反应的路径函数完成的。表示在恒定负载下的等压膨胀过程，其中热能的吸收和向机械功的转换是沿着循环的一次转换同时进行的，这与传统的基于卡诺的发动机所发生的情况相反，在传统的基于卡诺的发动机中，通过沿单一转换的准熵膨胀。由于上述差异，这些循环不符合Carnot声明。对OPTC和ROPTC在氢气，氦气和氮气下运行的性能进行了分析，并将结果与​​在相同范围内运行的Carnot循环进行了比较温度。 ROPTC达到了较高的理论热效率，在有利条件下超过了卡诺因数。用结构简单紧凑的发动机获得的这些结果为新一代功率转换器铺平了道路。

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