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1. Under different pressures the flashing in riser of natural circulation system and its effect on flow stability were studied by the method of visual observation in synchronism with data recording.

2. In order to research its natural circulation, the downcomer part and the riser part is distinguished, where there are no mass and energy transferred between them.

3. The 300MW subcritical pressure natural circulation boiler fired coal is described in detail.

4. Natural circulation is adopted in the flowage of reactor core.

5. The improvement and operation of natural circulation waste heat boiler for sulphuric acid plants are described.

6. The natural circulation ability of PWR (pressurized water reactor) coolant system is one of inherent safeties of this kind NPP (nuclear power plant).

7. A natural circulation HRSG dynamic model is waswas important in studying the dynamic behaviors of HRSG.

8. The heat transfer coefficient of natural circulation flow increases with the rolling amplitude and frequency.

9. The residual heat removal system with natural circulation is a passive safety system.

10. Natural circulation evaporator with external calandria is used in the evaporation process for the production of 72% (wt) flake caustic soda.

11. Natural circulation flow instability under rolling motion conditions was experimentally studied.

12. In evaporating system design of large subcritical pressure natural circulation boiler sometime expensive rifled tube will be used unavoidably in part[sentencedict .com], so that the film boiling Can be avoided.

13. A correlation of two-phase natural circulation flow rate is derived from constitutive equations by using of specific system parameters and several semi-empirical formulas are obtained.

14. The core of DPR - 1 is cooled by natural circulation and DPR - 3 is cooled by forced circulation.

15. The investigation on heat transfer of single phase liquid flow tube with natural circulation is performed.

16. The study and experiment of saturated liquid nitrogen boiling heat transfer in natural circulation at atmospheric pressure in home made porous layer tube is described.

17. The results show that the ocean conditions have effects on the natural circulation flow and the ability of heat transfer.

18. Decreasing the heat flux or outlet two-phase resistance(Sentencedict.com), and increasing the system pressure or inlet single-phase resistance are useful to avoid the natural circulation flow instability.

19. Paper gives a brief description of the design features and operation experience of the first 300MW natural circulation boiler manufactured in China.

20. The results show that heaving has less effect upon the primary Loop's coolant flow rate and PWR output power in case of forced circulation but strongly influences natural circulation ability.

21. The key lies in producing enough great driving force of natural circulation at reasonable heating temperature difference to make masted tape self-rotate reliably in heat transfer tubes.

22. The Effect of rolling upon heat transfer characteristic of single-phase natural circulation is experimentally studied in the paper.

23. Thermal characteristics of the gravel layer in the system heated by hot water natural circulation with solar collector were studied.

24. In the view of the characteristics of the single-phase natural circulation flow under rolling motion, the research was conducted experimentally.