OS2-19 グループ寄与状VTPR態方程式による低温熱源二成分混合物サイクルの動作媒体の選定に関する研究(OS2 自然エネルギー,循環型社会における動力エネルギー技術)

概要

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The dispersed power source is recognized as one of solutions for energy saving. Since demands of heat are smaller than those of electricity in case of using this kind of power source, the redundant thermal energy is put off for nothing. If we can regenerate the power from waste heat, the thermal efficiency of the dispersed power source system is increase. Though a steam turbine cycle can be used for the regeneration of power, water (H_2O) may not be used as a working fluid of this power cycle because of the low temperature of waste heat. In this paper, we show the evaluation methods of the working fluid for the power cycle operating with the low temperature heat source and cycle simulations by the group contribution equation of state volume translated Peng-Robinson (GCEOS VTPR). First, we searched a set of the critical constants of the optimal super critical working fluid by the exergy analysis by means of the van der Waals equation of state, and then real performances of thermodynamic cycles with some real binary working fluids are calculated by the GCEOS VTPR. The GCEOS VTPR was used to calculate the properties of the mixture, because it could calculate large amount combinations by published interaction parameters.
一般社団法人日本機械学会の論文
2007-06-13