Dymola - No event error for heat exchangers
Anyone has already faced this error?
noEvent(abs(station.hex.Q1_flow) < 836800.0*max(3.586800573888092E-006, abs(station.hex.port_a2.m_flow))) The following error was detected at time: 14394150.45868399 Energy may not be conserved for small mass flow rates. The implementation may require prescribedHeatFlowRate = false. Solver will attempt to handle this problem.
noEvent(abs(station.hex.Q1_flow) < 836800.0*max(3.586800573888092E-006, abs(station.hex.port_a2.m_flow))) The following error was detected at time: 14394671.87665271 Energy may not be conserved for small mass flow rates. The implementation may require prescribedHeatFlowRate = false. Solver will attempt to handle this problem.
station1.pumpDHN.phi > -0.2 The following error was detected at time: 14483651.91603983 Valve control signal needs to be bigger than zero, received phi = -0.2 Integration terminated before reaching "StopTime" at T = 1.45e+07
I am trying to run the BuildingSystems district heating example DistrictNetwork_dp in Dymola the model runs for more than 100 days, but stops with this problem.
any help? thanks
