The problem how to discharge air in the double tube underside feed and underside return flow heatingsystem is solved by improvement of system design.
并通过改进系统设计较好地解决了下供下回式热水供暖系统排放空气的问题。
2
Taking an introduced 300mw unit as an example, some reasons for adopting medium-pressure heater and some advantage of feed-water medium-pressure heatingsystem have been described in the paper.