| 摘要 |
The heat content of the forwarded air, e.g. from the swimming bath region, is considerably higher than is maximally required for the heating of the same quantity of external air-supplied air. Example: the heat content of the forwarded air at 29 DEG C/14.3 g moisture amounts to 72.49 kJ in contrast to the external air at -10 DEG C/1.3 g moisture. For the heating of the external air from -10 DEG C to +29 DEG C, only 42.5 kJ are however required. Hence even at a best heat exchanger efficiency of PHI = 80%, an annual enthalpy efficiency nh of only about 36% is achieved. According to the invention, the whole cold water quantity required in any case, and to be heated for the hot water preparation and the fresh water supply to the pool, is included in the heat recovery process and is brought into preferential heat exchange with the forwarded air. The water is thus preheated to about 25/26 DEG C. The heat energy then still present in the forwarded air is then further transferred with the following heat recovery system. Thus the annual enthalpy efficiency is improved to APPROX 80%. If now the heat exchanger of the heat recovery system is designed for a temperature exchange degree of PHI APPROX 0.8 at a water equivalent ratio of w = 1.0, the forwarded air mass stream which is present in any case can be used downstream as a further heat source for a profitable operation of a heat pump, in that the evaporator portion of the heat pump is directly connected to the pipe system of the circulation-connected heat recovery system. |
