DREVAS: Energy Recovery Device from Sanitary Water Pouring.
As it is well known, part of the water entering buildings and housing is heated to adapt it to the needs of the consumption point (by consumption point it is understood: dishwashers, washing machine, shower, or any application requiring hot water).
That increase of temperature is performed by means of boilers or other devices which use fossil fuels or electricity as power source.
And, if we reduce the use which has to be made of those boilers, without affecting the consumption points?
We would achieve, then, a decrease of carbon dioxide emissions, a decrease of the electric power and gas consumption in housing, and, of course, an economical saving.
Where is "DREVAS" placed?It is placed just before the water connection, whether to the house, community of housings or building with hot water consumption.
The water, upon entering in "drevas", circulates through several water pipe coils (located inside the dry chambers) and it becomes heated, since, in counter-current and through the outside of the dry chambers the sanitary water circulates, which will have a higher temperature, due to the heat supply they received at the consumption point (by consumption point is understood: dishwashers, washing machine, shower or any application requiring hot water).
Basically, it is a heat exchanger between the sanitary water pourings (hot circuit) and the inlet water (cold circuit), but with an important peculiarity. The possibility does not exist of contamination between the sanitary water pourings and the water.
Afterwards, the outlet water from the "DREVAS" (already pre-heated), will go through the boiler or energy supplying element to provide the necessary temperature required by the consumption points.
The temperature degrees provided by "DREVAS" will not have to be provided by the boiler nor any other heating element, this translates into power saving, economical and of low carbon dioxide emissions.
It is fully compatible with solar thermal, and also produce synergies between the two systems. "DREVAS" support these systems, so that they are not oversized. In addition, in places where space to place the solar collectors is critical, could represent a great advantage.
This device of energy recovery is patented in Spain.