建立了新型板式省煤器的传热模型，计算了新型板式省煤器的火积耗散热阻以及空气侧压降，分析了新型板式省煤器结构参数及空气流速变化时，火积耗散热阻及空气侧压降的变化情况。研究结果表明：增大长轴可以减小火积耗散热阻，有利于提高板式省煤器的传热性能，并且空气侧压降变化幅度不大；增大短轴可以减小火积耗散热阻，有利于提高板式省煤器的传热性能，但空气侧压降增大；减小板束间距可以减小火积耗散热阻，有利于提高板式省煤器的传热性能，但空气侧压降增大，尤其是在板束间距小于20 mm时，继续减小板束间距会造成空气侧压降急剧增大；增大空气进口流速可以减小火积耗散热阻，有利于提高板式省煤器的传热性能，但空气侧压降增大，对换热器的磨损也会增加。

The heat transfer model of the new type of plate economizer is established.The entransy dissipation resistance and air-side pressure drop of the new type of plate economizer are calculated as evaluation indexes of its performance.The variation of entransy dissipation resistance and air-side pressure drop with the change of structure parameters and air inlet velocity is discussed.The results show that increasing the major axis can reduce the entransy dissipation resistance and improve the heat transfer performance of the plate economizer,and the air-side pressure drop has little change.Increasing the minor axis can reduce the entransy dissipation resistance and improve the heat transfer performance of plate economizer,but the air-side pressure drop increases.Decreasing the plate spacing can reduce the entransy dissipation resistance and improve the heat transfer performance of plate economizer,but the air-side pressure drop increases,especially when the plate spacing is less than 20 mm.The air-side pressure drop will increase sharply if the plate spacing is further reduced.Increasing the air inlet velocity can reduce the entransy dissipation resistance and improve the heat transfer performance of the plate economizer,but the air-side pressure drop will increase,and the wear of the heat exchanger will also increase.

TK172

江苏省南通市科技项目（GY12016009）