【摘要】 <正> 一、前言 由于CFC-12生存期很长(约100年),排入大气后所产生的对臭氧层的破坏作用与造成的温室效应,已引起国际社会的关注。迄今为止,HFCl34a曲于其生存期短(6年),而且与CFCl2具有相近的正常沸点,是一种很有希望的CFCl2替代工质。 PVT性质的研究是HFCl34a热物性研究项目中的一个重部分。近两年国已更多还原

【Abstract】 In the present study, we have measured PVT properties of HFC-134a in low temperature range by using the well-known Burnett method. The experimental uncertainty of the present measurment has been estimated being within ±15mK for temperature, ±2kPa for pressure respectively. The sample used is haying a purity of 99.98%. Fifty PVT data have been measured. The experimental PVT data as well as those reported by Wilson et al., Weber and Piao et al. compared with the state equations developed by Wilson et al.更多还原