METHOD OF CONTROLLING THE EXIT TEMPERATURE OF VAPOUR PASSING THROUGH A SURFACE-CONTACT ING MEANS OF A VAPOUR GENERATOR

摘要

Measurements of the instantaneous flow of heat delivered to the vapor generator and the quantity of vapor flowing momentarily through the contact heating surface are made and the resultant signals are compared by subtraction or division to obtain a comparison signal. The comparison signal is then imposed on a control element in the form of a valve to cause an injection of more or less water into the vapor flowing into the heating surface in order to regulate the exit temperature of the vapor.