FIELD: heat supply systems; measuring technique.
SUBSTANCE: supply and reverse pipelines of heat supply system are provided with volumetric electromagnet flow discharge meter having linear characteristic. It also has pressure converters, temperature converters and units for calculating density ρ1 and ρ2, enthalpy h1 and h2 of heat transfer agent. Cold water temperature converter in make-up pipeline is connected with unit for calculating enthalpy hcw of cold water. Heat meter has unit for measuring difference in volumetric discharges Δq3 in supply and reverse pipelines, density difference Δρ, unit for calculation of mass consumption m2 in reverse pipeline, unit for calculation difference in mass consumption ΔM of heat transfer agent taken from network. Value of heat energy Q during time from τ0 to τ1= τ1∫τ0 m2(h1-h2)dτ+(h1+h2cw)τ1∫τ0 Δτ, where m2=ρ2q2 is mass consumption in reverse pipeline; ΔM =τ1∫τ0 ΔmΔτ. In this case Δm equals to Δm=ρ2Δq3+q1Δρ. Pair of volumetric electromagnet flow discharge meter is subject to calibration due to reproduction of value of volumetric consumption.
EFFECT: improved precision of measurement.
2 cl, 5 dwg
