A new calculation method for stream heat transfer temperature difference contribution value is proposed based on the thermodynamic principle of equal exergy loss distribution. Thereby, stream pseudo-temperature, that is, the stream effective temperature level, is determined, and composite curves are constructed on the T-H diagram, a reasonable feasible network structure is attained by vertical match in enthalpy intervals. In principle countercurrent heat exchange in network is achieved based on the stream effective temperature level, so probability of attainment of near optimum feasible solutions is high and these solutions are original feasible solutions and ordinal optimal solutions in evolution.(2) A new and effective mathematical model is presented for synthesizing MSHEN.
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The test results show that the porosity of sandstone decrease with the increasing effective stress at the fixed temperature level, following the law of negative exponent.
试验结果表明，在温度水平一定的条件下，砂岩的孔隙度随有效应力的增加而呈负指数规律减小；
The porosity test for sandstone was conducted at various temperature level and various effective stress level.
在不同温度水平和不同有效应力水平下，进行了砂岩的孔隙度试验。
The temperature characteristic of the effective mass are discussed in detail at different approximation calculation level.
详细讨论了在不同的近似计算程度情况下有效质量的温度特性。
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