Nul warmth conversion device backup change system

摘要

PURPOSE:To perform a stable supply at peak load time in the winter, by way of example, as well as to promote the efficient operation of an air temperature vaporizer and its labor-saving by making automatic selector operation performable to a spare air-temperature vaporizer for backup, at time of a vaporization capacity drop in the main air-temperature vaporizer. CONSTITUTION:This system is provided with a main air-temperature vaporizer 1 for vaporizing liquefied petroleum gas and a spare backup air-temperature vaporizer. When an amount of liquid portions goes up to more than a specified level 13 H by a level transmitter 13 which detects the amount of liquid portions so far failed to vaporized at the main air-temperature vaporizer 1, the backup air-temperature vaporizer is operated by an actuator valve. In addition, when the amount of liquid portions so far failed to be vaporized at the main vaporizer 1 is reduced up to less than the specified lever 13L, operation of the backup vaporizer is stopped.