The core function of a hot water boiler is to provide hot water and meet various heating demands based on the heat transfer of hot water. The common application scenarios mainly fall into the following categories:
1. Civil heating
This is the most widespread use of hot water boilers. The boiler heats water to a certain temperature (usually the supply water temperature is 80-95 ℃ and the return water temperature is 60-70 ℃), and then delivers it through pipes to the terminal equipment such as radiator, floor heating coil or fan coil in the room. The heat of the hot water is used to raise the indoor temperature, which is suitable for winter heating in residential buildings, office buildings, shopping malls, schools and other places.
2. Domestic hot water supply
Some hot water boilers can also be used or are specifically designed to supply domestic hot water, such as meeting the needs of bathing, kitchen water, cleaning water, etc. In such scenarios, the temperature of the hot water heated by the boiler is generally controlled at 40 to 60 degrees Celsius and is supplied to the water usage points within the building either through a hot water storage tank or by direct delivery.
3. Industrial production heating
In the industrial field, hot water boilers can serve as heat sources to provide heating support for production processes, for example:
Constant temperature heating for dyeing and drying processes in textile factories;
It is used in food processing plants for raw material preheating, steaming, sterilization and other processes;
It is used for temperature control and heating of reaction vessels in the chemical and pharmaceutical industries, or for insulation and moisture retention in workshops.
It should be noted that the water in a hot water boiler is generally in a closed or semi-closed circulation. Compared with steam boilers, it has a lower operating pressure, higher safety, and less heat loss.