| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piping freeze prevention control technology of a cogeneration system. <P>SOLUTION: When an outside air temperature (Te) is not higher than a freeze limit temperature (T0), the circulating water of a freeze prevention circuit C3 is heater-energized until it reaches a non-freeze assured temperature (Tx) and heated, and the energization of a heater 2d is stopped for a prescribed time (ΔHf) after a rise of a temperature. Here, the non-freeze assured temperature (Tx) is set as a temperature for assuring the non-freeze of piping for at least the prescribed time (ΔHf) after the stop of the energization of the heater 2 under a condition that the non-freeze assured temperature is the outside air temperature. <P>COPYRIGHT: (C)2013,JPO&INPIT |
