诚信承诺书摘 要在科技发达人类可自由控制冷暖的今天。换热器作为各行各业工作生产和日常生活必需的热交换装置,被普遍的使用在生产技术、化工工业、日常制冷、军工国防等传统部门。能源的利用率受到换热器质量的影响。21 世纪以来,节省能源这一方面的相关研究被世界各国重点关注,而高效换热器是关键的节能设备。因此，换热器合理高效的设计和制造对国家事业的发展和高效利用能源都有着至关重要的影响。该设计是关于换热量为24kW 的翅片管风冷冷凝器的设计，其适用于制冷能力在 20kW 左右、冷凝温度为 50 度、风力压强 190Pa 以下的空调制冷系统。首先进行传热计算，根据给定的设计条件估算换热面积，校核传热系数，计算出实际换热面积。然后进行结构设计，选择采用厚度为 0.15mm的平直铝肋片和管径为 9.52mm 的紫铜管作为翅片和换热管，计算出采用长 1.6m、宽750mm、深 88mm 的换热器并根据算得空气流量进行风机选型。最后，通过选定风机的压头来进行强度验证以验证该冷凝器是否满足要求。 关键词：冷凝器;传热;翅片管式换热器;Design of 24kW air-cooled heat exchanger1AbstractNowadays, human beings can freely control the warm and cold. As a heat exchange device necessary for work production and daily life in all walks of life, heat exchangers are widely used in traditional departments such as production technology, chemical industry, daily refrigeration, military industry and national defense. Energy utilization is affected by the quality of the heat exchanger. Since the 21st century, related researches on energy saving have been paid close attention to by countries all over the world, and high-efficiency heat exchangers are the key energy-saving equipment. Therefore, the rational and efficient design and manufacture of heat exchangers have a crucial impact on the development of the national cause and the efficient use of energy. The design is about the design of a finned tube air-cooled condenser with a heat exchange capacity of 24kW. It is suitable for air conditioning and refri...
