| 摘要 |
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 rho1 and rho2, 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 Deltaq3 in supply and reverse pipelines, density difference Deltarho, unit for calculation of mass consumption m2 in reverse pipeline, unit for calculation difference in mass consumption DeltaM of heat transfer agent taken from network. Value of heat energy Q during time from tau0 to tau1= tau1∫tau0 m2(h1-h2)dtau+(h1+h2cw)tau1∫tau0 Deltatau, where m2=rho2q2 is mass consumption in reverse pipeline; DeltaM =tau1∫tau0 DeltamDeltatau. In this case Deltam equals to Deltam=rho2Deltaq3+q1Deltarho. 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 |
