高压下液氨的pVT关系计算

Calculation of Pressure-Volume-Temperature Relationship of Liquid Ammonia at High Pressures

介绍了一个普遍化的Tait型高压液体的状态方程,并将它应用于高压下液氨的pVT数据的计算。对照2组文献数据(一组温度253～313K,最高压力180MPa;另一组温度310～350K,最高压力110MPa),计算结果表明,平均绝对偏差分别为0.20%和0.94%。本方程适合用来描述液氨的pVT行为。

A generalized equation of state for liquids at high pressures based on the Tait equation is proposed and is examined by using the pVT data for 15 liquids,including some polar substances,at high pressures,satisfying results are gained.The specific volumes of liquid ammonia are calculated by this equation in the temperature range between 253.15313.15 K and 310-350 K under pressures respectively up to 180 MPa and 110 MPa.The results show that this equation can be applied to description of the pVT behavior for...