A gas water heater is nearly identical to an electric water heater, except that it does not contain the two heating elements, but instead has a gas burner at the bottom, with the chimney running up through the middle of the tank.
How a gas water heater works
1. Cold water is supplied to the tank (from the long tube) and injected at the bottom of the tank through a dip tube.
2. The denser cold water stays there and is heated by the gas burner. As the water heats up, it naturally rises and is drawn off by the hot water discharge pipe so the hot water pipe is much shorter than the cold water pipe. This ensures that only the hottest water is being used from the tank. The hot water heater has simple parts and some safety features.
Source : http://homerepair.about.com/od/plumbingrepair/ss/hwh_tank_gas.htm
http://www.robinhoodpropertyservicesspain.com/water_heaters.html
ไม่มีความคิดเห็น:
แสดงความคิดเห็น