“汽—汽换热法”产生过热蒸汽初探

论述了浸出油厂采用“汽—汽换热法”产生过热蒸汽的可行性及优越性 。

喷射式混合加热器在汽水换热系统中的应用

喷射式混合加热器具有传热系数大、热效率高、造价低等优点,本文系统介绍了喷射式混合加热器在汽-水换热系统中的应用,说明了不同的应用方式及优点。

Influence of coherent structures in the gas-particle circular cylinder wake flow

To investigate the influence of coherent structures in the gas-particle wake flow, direct numerical simulation (DNS) method was adopted to compute a two-dimensional particle laden wake flow. A high accuracy spectral element method (SEM) was employed to simulate the gas flow field and a Lagrangian approach was used to compute the particles movement. Numerical results showed that at the same Stokes numbers, particles would be greatly impacted by the development of the coherent structure. But with different Stokes numbers, it can be seen that the large-scale vortex structures would influence the particle flow differently. While under different Reynolds numbers (150 and 200), there are no great changes in the particle laden flow.

背压机技术在供热优化改造中应用研究

针对300MW亚临界纯凝机组高压供热改造问题,提出了5种背压机解决方案。借助EBSILON软件,通过变工况分析方法对各方案进行分析,结果表明:方案2、方案3和方案4经济性相同,但由于采用减压技术,比方案1系统效率降低了约35. 93%。方案5经济性虽高,但存在改造范围大和高中压供热耦合性大等问题。综合考虑方案的经济性和灵活性,方案1是解决此类问题的首选方案。同时,还提出了采用汽-汽换热器系统,解决高压供热温度偏低的问题。