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2 results about "Ideal solution" patented technology
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In chemistry, an ideal solution or ideal mixture is a solution with thermodynamic properties analogous to those of a mixture of ideal gases. The enthalpy of mixing is zero as is the volume change on mixing by definition; the closer to zero the enthalpy of mixing is, the more "ideal" the behaviour of the solution becomes. The vapor pressure of the solution obeys Raoult's law, and the activity coefficient of each component (which measures deviation from ideality) is equal to one.
Steam-to-multi-element thermal fluid huff and puff development effect evaluation method
The invention relates to a steam-to-multivariate thermal fluid huff and puff development effect evaluation method. The method specifically comprises the following steps: establishing an evaluation index system comprising a plurality of evaluation indexes; calculating first weights of the plurality of evaluation indexes based on an analytic hierarchy process; collecting well injection data, and calculating a plurality of evaluation index values according to the evaluation index system to obtain original data; calculating second weights of a plurality of evaluation indexes in the evaluation index system according to the original data; and on the basis of a combined weight of the first weight and the second weight and a relative attachment degree of the observation value of the to-be-evaluated object and the ideal solution, performing steam-to-multivariate thermal fluid huff and puff development effect evaluation on the to-be-evaluated object to obtain an evaluation result. According to the method, the accuracy and reliability of steam-to-multi-element thermal fluid huff and puff development effect evaluation can be remarkably improved, and the overall level of the development effect is reflected.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Method for evaluating effect of coal gasification slag dewatering agent
A method for evaluating the effectiveness of dewatering agents for coal gasification slag includes: obtaining dewatering efficiency indicators (agent dosage, filter cake moisture content, dewatering rate, and specific resistance) of coal gasification slag after conditioning with different dewatering agents; performing homogenization and dimensionless processing on the indicator data; objectively calculating the weights of each indicator based on the dispersion of the coefficient of variation method; constructing a weighted normalized matrix based on the TOPSIS method to determine the positive and negative ideal solutions; calculating the basic comprehensive efficiency index of each agent scheme; and introducing a working condition correction factor to correct the basic comprehensive efficiency index to obtain the comprehensive dewatering efficiency index, where a larger index value indicates a better overall dewatering effect of the agent scheme. This invention achieves comprehensive evaluation of multiple indicators through objective weighting using the coefficient of variation method, combined with the TOPSIS method, and introduces a working condition correction factor to enhance cross-working condition comparability. This provides a scientific, quantitative, and reliable decision-making basis for the screening and process optimization of coal gasification slag dewatering agents.
Owner:CHINA UNIV OF MINING & TECH