Heat recovery of sewage into a private home.

In our modern age with you, when energy every year becoming more expensive, faster and faster, saving energy is no longer just a fashionable trend, and sometimes a necessity.

Recovery is the return of a certain energy that has been allocated for useful work, and translate it into useful. Heat exchangers have long been used in private homes in Europe, where it is very important because of the high cost of energy. In Russia, recuperators are just beginning to emerge.

The main sources of heat loss in a well insulated house is ventilation and waste discharge warm water into the sewer. To compensate for the loss of heat from the exhaust ventilation air heat exchangers are used. About them in more detail, I will tell on this website in other articles. Here, I discuss the recovery of waste water.

Have you ever wondered how much heat leaves the water, then, for example, taking a bath, when opening the drain plug? After all, in order to take a bath, we use less than half the heat, and the rest goes down the drain. Of course, the city dweller with a central hot water is a little worried, and if they are concerned, we take in this case is nothing special. After all, vacation hot water meter says, and he believes liter, but no calories. But the owner of the cottage with its own system of water use water heat recovery system can save money. If, for example, hot water heated by gas boiler, the use of heat recovery system saves gas, but our gas prices, I think there is little point in applying exchanger. But if hot water is heated by electricity, the use of heat recovery up to date.

How does the heat exchanger of sewage? It's very simple. Warm or hot water from sinks and tub (except water toilet, bidet, etc.) falls into the sewer is not immediately, but in the heat exchanger, heat exchanger through which water from wells or storage tank is heated by the heat of wastewater. Thus, the output of sewage water, cooled down finally gets into the sewer system and the heated water from the tank goes to the water heater and a mixer, thus saving energy for heating water to the exposed temperature.

Waste water heat recovery unit can be used only for a split sewer system that is in such a system, where the gray and black (toilet, bidet), the water discharged by individual pipes. According to the principle of action, I see recuperators flow or storage. On the effectiveness of heat storage find a more effective, so look at it any way.

I should note right away that I mean the design is my prototype, without any oglyadok on construction of industrial production.

So, it's insulated plastic container a certain amount. Serve warm from top to waste water and drainage is also on top, but through the fence bottom of pipe. See the figure. This system makes it possible separation of warm and cold water layers. Cold water, cooled down, down to the bottom. This gives a great performance. In the middle of the coil is located inside the tank, heat exchanger. I think it would be most effective from a copper tube wound in a spiral. The length of pipe is also amenable to calculation. However, it depends on the capacity of the coil. The tank should have access to periodic cleaning of the inevitable build-up of soap, grease, solid waste, etc.