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介绍了生活锅炉中相交换热的传热系数Ｋ的数值及影响因素，应用相应的Ｋ值计算的相变热面面积与实际需求基本相符，使设计更趋合理与完善。
The numerical and influencing factors of the heat transfer coefficient K of the exchanging heat in domestic boilers are introduced. The phase change thermal surface area calculated by the corresponding K value is basically consistent with the actual demand, which makes the design more reasonable and perfect.