TWO-STAGE HEAT REGENERATOR FOR HOT WATER SUPPLY SYSTEM Russian patent published in 2012 - IPC F24D3/08 

FIELD: power engineering.

SUBSTANCE: invention is related to hot water supply systems, namely, to heat regenerators. A two-stage heat regenerator for a hot water supply system makes it possible to usefully spend heat of waste water to heat water supplying the hot water supply system. The regenerator comprises two recuperative heat exchangers designed to transfer heat from waste water to water supplying to water heaters. The hot supply system comprises a conventional heater for hot water (60-90°C) and a heater for cold water, which differs only by the fact that it heats water to low temperature (20÷25°C). In the first heater water is heated, which supplies to the hot heater, in the second one - water supplying to the cold heater. Due to original design of a device it may be possible to achieve a much larger saving of energy compared to available analogues with the same area of heat exchange surfaces.

EFFECT: energy saving during water heating due to achievement of synergetic effect during serial connection of two recuperative heat exchangers.

3 cl, 2 dwg