基于热效率的直洞式火炕烟道构造形式优化设计

直洞式火炕存在高温烟气流场范围小、接触炕板面积小、出烟口温度高等缺点,导致火炕热效率低、热舒适度差。为改善和提升火炕热工性能,以流体力学和建筑热工知识为指导,遵循前引后导原则对烟道布置形式进行优化设计。通过对大量火炕模型烟气流场的模拟,精选出I(A)型、II(A)型2种改进火炕方案。利用ANSYS模拟技术对比分析可知:与现状火炕相比,改进火炕能够使更大范围的烟道炕洞、炕面板接触到高温烟气进而吸蓄、存储、释放烟气热量,降低了出烟口的排烟温度,大幅提升了火炕热效率和热舒适度。同时,也为火炕的优化设计研究提供了一种新的技术方法。

Optimum Design of STRAIGHT-HOLE FIRE KANG Flue Structure Based on Thermal Efficiency

The STRAIGHT-HOLE FIRE KANG has the disadvantages of small range of high temperature smoke flow field, small area of contact FIRE KANG plate and high smoke outlet temperature, resulting in low thermal efficiency and poor thermal comfort. Based on the knowledge of fluid mechanics and building thermal engineering, the flue of FIRE KANG was optimized. By ANSYS simulation analysis shows: compared with the present situation of FIRE KANG resistance, improved FIRE KANG resistance allows a wider range of flue the flue of a FIRE KANG, FIRE KANG panel exposure to high temperature flue gas, in turn, storage, storage and release of flue gas heat absorption, at the same time reduces the smoke outlet temperature, thermal efficiency greatly improved FIRE KANG resistance and thermal comfort, also for the FIRE KANG resistance of the optimization design method provides a new technology.