In a gas water heater: The gas flame warms the water, exactly the same way as a gas stove burner does for a pan of water on the stove. In an electric water heater, an element - same as an electric range element, but a different shape - heats up from electrical current, and transfers that heat to the water.
With no water no heat can be transferred through the heater coils.
The water pump moves the coolant around the system so the heat can be transferred inside.
The heat is being transferred by convection.
It's done with an electrical element inside the tank.It's the same principle as boiling water in an electric jug.Hope this helps.
conduction
Heat pump pool heaters use electricity to capture heat. As the pool pump circulates the water, it is drawn from the pool and through a filter and into the heat pump heater. The heater itself has a fan that pulls in outside air and pushes it over the evaporator coil. At this point liquid refrigerant in the evaporator coil absorbs the heat from the outside air converting it into a gas. The gas is then passed through the compressor where it increases the heat. This very hot gas is then sent through the condenser where the hot gas is transferred to the cool pool water circulating through the heater. The heated water is then returned to the pool. A pool heater on the other hand uses the gas directly to heat the water by fueling the combustion chamber.
It's called water heater. There isn't a reason to heat hot water
a bad water pump could cause low heat. The heater uses the coolant from the pump to generate heat.
all objects emit electromagnetic radiation through empty space, as well as matter. So feel the heat from the electric heater due to radiation.
There are two insulated heater elements that heat the water.
In virtually all current production cars the heater is run off hot coolant run through a small special radiator called a heater core.
As the stove heats up the pot, heat is transferred from the pot to the water through conduction. Within the pot, heat is transferred through convection from the hot water molecules to the cold ones.