热水一般多用热媒蒸汽加热制得,加热方式又常用汽水混合直接加热。虽然直接加热噪音较大,加热用的蒸汽进入热水中而需增加锅炉的软水补给量。但是,因其热效率高、加热设备小、加热系统简单、投资和经营费用都比间接加热抵得多、操作管理亦方便。特别是低噪音汽水混合加热器的研制成功,使设计者在工业企业、机关学校及其它中、小型热水供应工程中有了更好的选择。 Hot water is generally made by heating the heat medium with steam, and the heating method is commonly used for direct heating with steam and water. Although the direct heating noise is large, the steam for heating needs to be added to the hot water and the amount of soft water replenishment of the boiler needs to be increased. However, because of its high thermal efficiency, small heating equipment, simple heating system, investment and operating costs are much more than indirect heating, operation and management are also convenient. In particular, the successful development of low-noise steam-water mixing heaters has enabled designers to have better choices in industrial enterprises, institutions and other medium and small-scale hot water supply projects.