Patent ID: 7813627
Filing Date: 2010-10-12
Classification: F17C,Y10T

Abstract:
1. A system for delivering vapor phase fluid comprising: at least a first and second vessel, each vessel having a vessel wall, each vessel containing an amount of liquid phase fluid; a heater in communication with each of the first and second vessel; a controller in communication with the heater, said controller controlling an amount of heat delivered to the first and second vessels and an amount of heat delivered to the liquid phase fluid contained within the first and second vessels; a sensor to monitor at least one condition, said condition selected from the group consisting of: vapor phase fluid pressure, vessel wall temperature, vapor phase fluid low vapor pressure contaminant concentration, and combinations thereof, in the first and second vessels; and a controller in communication with the sensor, and at least one valve having an on/off position, said valve directing flow from the first or second vessel to an end use, said sensor activating the valve on/off position to an off position when the condition reaches a predetermined level; and a vapor phase fluid delivery control loop in communication with the first and second vessels and an end use, such that, as flow from a first vessel is diminished, flow from a second level is increased.