Hot or Cold water and District heat/cool
Water is commonly used to transport thermal energy to or from a facility, sometimes called District Heating (or cooling). Pool heaters are also examples of heat transport systems where the water is heated up by the sun, moved through hoses and tubes with a pump, and leaves off that energy to the pool water.
To calculate the energy transfer in such a system, the following must be known:
The type of fluid (usually water)
The temperature of the fluid entering the consumer.
The temperature of the fluid returning from the consumer.
The rate of flow.
Two temperature probes and a flow meter will provide the data needed to calculate the energy transfer. There are special integrators designed to do the calculation and conversion to kWh or BTU and keeping track of the energy transfer. The ezeio is also capable of acting as an integrator, reading the flow and temperatures directly from the sensors.