Patent ID: 7905656
Filing Date: 2011-03-15
Classification: G01K

Abstract:
1. A passive differential calorimeter, comprising an inflow control valve ( 2 ″), differential measurement means ( 4 ″) including the driving part of an input water meter ( 15 ) and the driving part of an output water meter ( 16 ), a back flow control valve ( 9 ″) and connecting pipes between them, wherein both the inflow control valve and the output flow control valve are temperature controlled valve, i.e. the flow through the valve is controlled according to the medium temperature, the inlet of the inflow meter is connected with the high temperature medium end and the inlet of the output water meter is connected with the low temperature medium end, characterized in that: the medium inlet ( 1 ″) is connected with a tee ( 17 ) which separates the medium flow that flows into the calorimeter in two ways, one of which (bypass line) goes into the inlet of the inflow control valve ( 2 ″), of which the outlet is connected with another tee ( 7 ″), and the other of the two lines (measurement line) goes into the inlet ( 18 ) of the flow meter ( 15 ), of which the outlet ( 19 ) is connected with the tee ( 7 ″), which in turn is connected with the inlet of a radiator ( 8 ″); and the outlet of the radiator ( 8 ″) is connected with the third tee ( 22 ) which divides into two lines, one of which (bypass line) is connected with the inlet of the back flow control valve ( 9 ″), of which the outlet is connected with fourth tee ( 13 ″), and the other of the two lines (measurement line) is connected with the inlet ( 21 ) of the flow meter ( 16 ), of which the outlet ( 20 ) is connected with the tee ( 13 ″) connected with medium outlet ( 14 ″).