What is gravity circulation?
Category:
home and garden
home appliances
Gravity Circulating Heating System
In a hot water gravity heating system the circulation of water is a result of the density difference between hot water in the supply lines and cold water in the return lines. The hot water tends to flow upwards and cold water tends to flow downwards.
Subsequently, one may also ask, what is the main principle of gravity circulation of hot water?
The first hot water heating systems were gravity systems. When water is heated, it increases in volume; hence it becomes lighter and rises. Simultaneously cooler, heavier water falls. This is the principle on which gravity circulating systems work.
Similarly, it is asked, how does a gravity heating system work?
Gravity Fed Central Heating Systems When the water is heated it expands becoming less dense and lighter than cold water. The cold water sinks down the return pipe forcing the lighter hot water up the flow pipe and around the radiators.
The design of a hot water heating system may follow the procedure as indicated below:
- Calculate the heat loss from the rooms.
- Calculate the boiler output.
- Select heater units.
- Select type, size and duty of circulation pump.
- Make pipe scheme and calculate pipe sizes.
- Calculate expansion tank.
- Calculate safety-valves.