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Trouble with the HVAC setting

Dear all,

I am simulation a building using Openstudio and E+. The HVAC system is composted by a multifunctional heat pump (it makes simultaneously heating and cooling), a ground water condenser and cooled beams as air terminals that provided both the cooling and the heating in the zones. I have used the CentralHeatPumpSystem to simulate the multifunctional heat pump. I have used the PlantComponent:TemperatureSource to simulate the ground water used as condenser I have used the FourPipeInduction Air terminals to simulate the cooled beams. I can't understand why the simulation doesn't work properly and I have problems with the sizing of the objects and the convergence of the temperature.

Has someone of you any idea how should I do to solve this issue? I attach the idf below.

Thank you very much

Have a nice day

Elena

part of the error message:

************* Beginning System Sizing Calculations
************* Beginning Plant Sizing Calculations
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 2
**   ~~~   ** the apparatus dew-point is below the coil design inlet water temperature;
**   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
**   ~~~   ** The initial design conditions are: Tair,in = 25.9833
**   ~~~   **                                    Wair,in = 9.554298E-003
**   ~~~   **                                    Twater,in = 7.2200
**   ~~~   **                                    Tair,out = 9.2200
**   ~~~   **                                    Wair,out = 6.585921E-003
**   ~~~   ** The revised design conditions are: Tair,out = 9.2195
**   ~~~   **                                    Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL
**   ~~~   ** no apparatus dew-point can be found for the initial entering and leaving conditions;
**   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
**   ~~~   ** The initial design conditions are: Tair,in = 25.9845
**   ~~~   **                                    Wair,in = 1.167724E-002
**   ~~~   **                                    Twater,in = 7.2200
**   ~~~   **                                    Tair,out = 9.2200
**   ~~~   **                                    Wair,out = 6.585921E-003
**   ~~~   ** The revised design conditions are: Tair,out = 9.2195
**   ~~~   **                                    Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 1
**   ~~~   ** the apparatus dew-point is below the coil design inlet water temperature;
**   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
**   ~~~   ** The initial design conditions are: Tair,in = 25.9901
**   ~~~   **                                    Wair,in = 9.862493E-003
**   ~~~   **                                    Twater,in = 7.2200
**   ~~~   **                                    Tair,out = 9.2200
**   ~~~   **                                    Wair,out = 6.585921E-003
**   ~~~   ** The revised design conditions are: Tair,out = 9.2195
**   ~~~   **                                    Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 3
**   ~~~   ** the apparatus dew-point is below the coil design inlet water temperature;
**   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
**   ~~~   ** The initial design conditions are: Tair,in = 25.9832
**   ~~~   **                                    Wair,in = 9.506870E-003
**   ~~~   **                                    Twater,in = 7.2200
**   ~~~   **                                    Tair,out = 9.2200
**   ~~~   **                                    Wair,out = 6.585921E-003
**   ~~~   ** The revised design conditions are: Tair,out = 9.2195
**   ~~~   **                                    Wair,out = 6.586107E-003
** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-1".
**   ~~~   ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object.
**   ~~~   ** Check ventilation rate in Controller:MechanicalVentilation object.  Simulation will continue.
** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-3".
**   ~~~   ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object.
**   ~~~   ** Check ventilation rate in Controller:MechanicalVentilation object.  Simulation will continue.
** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-5".
**   ~~~   ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object.
**   ~~~   ** Check ventilation rate in Controller:MechanicalVentilation object.  Simulation will continue.
** Warning ** SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil has leaving air temperature > entering water temperature.
**   ~~~   **     Tair,out  =  12.800
**   ~~~   **     Twater,in = 82.000
**   ~~~   ** ....coil leaving air temperature will be reset to:
**   ~~~   **     Tair,out = 82.500
** Warning ** SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil is dry and has air leaving humidity ratio < entering humidity ratio.
**   ~~~   **     Wair,in =  1.549437E-002
**   ~~~   **     Wair,out = 8.500000E-003
**   ~~~   ** ....coil leaving humidity ratio will be reset to:
**   ~~~   **     Wair,out = 1.549437E-002
** Warning ** The design cooling capacity is zero for Coil:Cooling:Water COIL COOLING WATER 1
**   ~~~   **   The maximum water flow rate for this coil will be set to zero and the coil will do no cooling.
**   ~~~   **   Check the following coil design inputs for problems: Tair,in = 30.5044
**   ~~~   **                                                        Wair,in = 1.549437E-002
**   ~~~   **                                                        Twater,in = 82.0000
**   ~~~   **                                                        Tair,out = 82.5000
**   ~~~   **                                                        Wair,out = 1.549437E-002
** Warning ** Capacity ratio as a function of temperature curve output is not equal to 1.0
**   ~~~   ** (+ or - 10%) at reference conditions for ChillerHeaterPerformance:Electric:EIR= CHILLERHEATERMODULE
**   ~~~   ** Curve output at reference conditions = 1.166
** Warning ** Energy input ratio as a function of temperature curve output is not equal to 1.0
**   ~~~   ** (+ or - 10%) at reference conditions for ChillerHeaterPerformance:Electric:EIR= CHILLERHEATERMODULE
**   ~~~   ** Curve output at reference conditions = 0.717
** Warning ** Missing temperature setpoint on cooling side for CentralHeatPumpSystem named CENTRAL HP
**   ~~~   **   A temperature setpoint is needed at the outlet node of a CentralHeatPumpSystem, use a SetpointManager
**   ~~~   **   The overall loop setpoint will be assumed for CentralHeatPumpSystem. The simulation continues ... 
** Warning ** Missing temperature setpoint on heating side for CentralHeatPumpSystem named CENTRAL HP
**   ~~~   **   A temperature setpoint is needed at the outlet node of a CentralHeatPumpSystem, use a SetpointManager
**   ~~~   **   The overall loop setpoint will be assumed for CentralHeatPumpSystem. The simulation continues ... 
** Warning ** SizePlantLoop: Calculated Plant Sizing Design Volume Flow Rate=[0.00] is too small. Set to 0.0
**   ~~~   ** ..occurs for PlantLoop=CONDENSER WATER 2ND LOOP
************* Testing Individual Branch Integrity
************* All Branches passed integrity testing
************* Testing Individual Supply Air Path Integrity
************* All Supply Air Paths passed integrity testing
************* Testing Individual Return Air Path Integrity
************* All Return Air Paths passed integrity testing
************* No node connection errors were found.
************* Beginning Simulation
************* Beginning Simulation

Thanks

Trouble with the HVAC setting

Dear all,

I am simulation a building using Openstudio and E+. The HVAC system is composted by a multifunctional heat pump (it makes simultaneously heating and cooling), a ground water condenser and cooled beams as air terminals that provided both the cooling and the heating in the zones. I have used the CentralHeatPumpSystem to simulate the multifunctional heat pump. I have used the PlantComponent:TemperatureSource to simulate the ground water used as condenser I have used the FourPipeInduction Air terminals to simulate the cooled beams. I can't understand why the simulation doesn't work properly and I have problems with the sizing of the objects and the convergence of the temperature.

Has someone of you any idea how should I do to solve this issue? I attach the idf below.

Thank you very much

Have a nice day

Elena

part of the error message:

************* Beginning System Sizing Calculations
************* Beginning Plant Sizing Calculations
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 2
**   ~~~   ** the apparatus dew-point is below the coil design inlet water temperature;
**   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
**   ~~~   ** The initial design conditions are: Tair,in = 25.9833
**   ~~~   **                                    Wair,in = 9.554298E-003
**   ~~~   **                                    Twater,in = 7.2200
**   ~~~   **                                    Tair,out = 9.2200
**   ~~~   **                                    Wair,out = 6.585921E-003
**   ~~~   ** The revised design conditions are: Tair,out = 9.2195
**   ~~~   **                                    Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL
**   ~~~   ** no apparatus dew-point can be found for the initial entering and leaving conditions;
**   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
**   ~~~   ** The initial design conditions are: Tair,in = 25.9845
**   ~~~   **                                    Wair,in = 1.167724E-002
**   ~~~   **                                    Twater,in = 7.2200
**   ~~~   **                                    Tair,out = 9.2200
**   ~~~   **                                    Wair,out = 6.585921E-003
**   ~~~   ** The revised design conditions are: Tair,out = 9.2195
**   ~~~   **                                    Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 1
**   ~~~   ** the apparatus dew-point is below the coil design inlet water temperature;
**   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
**   ~~~   ** The initial design conditions are: Tair,in = 25.9901
**   ~~~   **                                    Wair,in = 9.862493E-003
**   ~~~   **                                    Twater,in = 7.2200
**   ~~~   **                                    Tair,out = 9.2200
**   ~~~   **                                    Wair,out = 6.585921E-003
**   ~~~   ** The revised design conditions are: Tair,out = 9.2195
**   ~~~   **                                    Wair,out = 6.586107E-003
** Warning ** In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 3
**   ~~~   ** the apparatus dew-point is below the coil design inlet water temperature;
**   ~~~   ** the coil outlet design conditions will be changed to correct the problem.
**   ~~~   ** The initial design conditions are: Tair,in = 25.9832
**   ~~~   **                                    Wair,in = 9.506870E-003
**   ~~~   **                                    Twater,in = 7.2200
**   ~~~   **                                    Tair,out = 9.2200
**   ~~~   **                                    Wair,out = 6.585921E-003
**   ~~~   ** The revised design conditions are: Tair,out = 9.2195
**   ~~~   **                                    Wair,out = 6.586107E-003
** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-1".
**   ~~~   ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object.
**   ~~~   ** Check ventilation rate in Controller:MechanicalVentilation object.  Simulation will continue.
** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-3".
**   ~~~   ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object.
**   ~~~   ** Check ventilation rate in Controller:MechanicalVentilation object.  Simulation will continue.
** Warning ** Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-5".
**   ~~~   ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object.
**   ~~~   ** Check ventilation rate in Controller:MechanicalVentilation object.  Simulation will continue.
** Warning ** SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil has leaving air temperature > entering water temperature.
**   ~~~   **     Tair,out  =  12.800
**   ~~~   **     Twater,in = 82.000
**   ~~~   ** ....coil leaving air temperature will be reset to:
**   ~~~   **     Tair,out = 82.500
** Warning ** SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil is dry and has air leaving humidity ratio < entering humidity ratio.
**   ~~~   **     Wair,in =  1.549437E-002
**   ~~~   **     Wair,out = 8.500000E-003
**   ~~~   ** ....coil leaving humidity ratio will be reset to:
**   ~~~   **     Wair,out = 1.549437E-002
** Warning ** The design cooling capacity is zero for Coil:Cooling:Water COIL COOLING WATER 1
**   ~~~   **   The maximum water flow rate for this coil will be set to zero and the coil will do no cooling.
**   ~~~   **   Check the following coil design inputs for problems: Tair,in = 30.5044
**   ~~~   **                                                        Wair,in = 1.549437E-002
**   ~~~   **                                                        Twater,in = 82.0000
**   ~~~   **                                                        Tair,out = 82.5000
**   ~~~   **                                                        Wair,out = 1.549437E-002
** Warning ** Capacity ratio as a function of temperature curve output is not equal to 1.0
**   ~~~   ** (+ or - 10%) at reference conditions for ChillerHeaterPerformance:Electric:EIR= CHILLERHEATERMODULE
**   ~~~   ** Curve output at reference conditions = 1.166
** Warning ** Energy input ratio as a function of temperature curve output is not equal to 1.0
**   ~~~   ** (+ or - 10%) at reference conditions for ChillerHeaterPerformance:Electric:EIR= CHILLERHEATERMODULE
**   ~~~   ** Curve output at reference conditions = 0.717
** Warning ** Missing temperature setpoint on cooling side for CentralHeatPumpSystem named CENTRAL HP
**   ~~~   **   A temperature setpoint is needed at the outlet node of a CentralHeatPumpSystem, use a SetpointManager
**   ~~~   **   The overall loop setpoint will be assumed for CentralHeatPumpSystem. The simulation continues ... 
** Warning ** Missing temperature setpoint on heating side for CentralHeatPumpSystem named CENTRAL HP
**   ~~~   **   A temperature setpoint is needed at the outlet node of a CentralHeatPumpSystem, use a SetpointManager
**   ~~~   **   The overall loop setpoint will be assumed for CentralHeatPumpSystem. The simulation continues ... 
** Warning ** SizePlantLoop: Calculated Plant Sizing Design Volume Flow Rate=[0.00] is too small. Set to 0.0
**   ~~~   ** ..occurs for PlantLoop=CONDENSER WATER 2ND LOOP
************* Testing Individual Branch Integrity
************* All Branches passed integrity testing
************* Testing Individual Supply Air Path Integrity
************* All Supply Air Paths passed integrity testing
************* Testing Individual Return Air Path Integrity
************* All Return Air Paths passed integrity testing
************* No node connection errors were found.
************* Beginning Simulation
************* Beginning Simulation

Thanks

Trouble with the HVAC setting

Dear all,

I am simulation a building using Openstudio and E+. The HVAC system is composted by a multifunctional heat pump (it makes simultaneously heating and cooling), a ground water condenser and cooled beams as air terminals that provided both the cooling and the heating in the zones. I have used the CentralHeatPumpSystem to simulate the multifunctional heat pump. I have used the PlantComponent:TemperatureSource to simulate the ground water used as condenser I have used the FourPipeInduction Air terminals to simulate the cooled beams. I can't understand why the simulation doesn't work properly and I have problems with the sizing of the objects and the convergence of the temperature.

Has someone of you any idea how should I do to solve this issue? I attach the idf below.

Thank you very much

Have a nice day

Elena

part of the error message:

************* 

*** Beginning System Sizing Calculations ************* *** Beginning Plant Sizing Calculations ** * Warning ** * In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 2 ** ~~~ ** * ~~~ * the apparatus dew-point is below the coil design inlet water temperature; ** ~~~ ** * ~~~ * the coil outlet design conditions will be changed to correct the problem. ** ~~~ ** * ~~~ * The initial design conditions are: Tair,in = 25.9833 ** ~~~ ** * ~~~ * Wair,in = 9.554298E-003 ** ~~~ ** * ~~~ * Twater,in = 7.2200 ** ~~~ ** * ~~~ * Tair,out = 9.2200 ** ~~~ ** * ~~~ * Wair,out = 6.585921E-003 ** ~~~ ** * ~~~ * The revised design conditions are: Tair,out = 9.2195 ** ~~~ ** * ~~~ * Wair,out = 6.586107E-003 ** * Warning ** * In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL ** ~~~ ** * ~~~ * no apparatus dew-point can be found for the initial entering and leaving conditions; ** ~~~ ** * ~~~ * the coil outlet design conditions will be changed to correct the problem. ** ~~~ ** * ~~~ * The initial design conditions are: Tair,in = 25.9845 ** ~~~ ** * ~~~ * Wair,in = 1.167724E-002 ** ~~~ ** * ~~~ * Twater,in = 7.2200 ** ~~~ ** * ~~~ * Tair,out = 9.2200 ** ~~~ ** * ~~~ * Wair,out = 6.585921E-003 ** ~~~ ** * ~~~ * The revised design conditions are: Tair,out = 9.2195 ** ~~~ ** * ~~~ * Wair,out = 6.586107E-003 ** * Warning ** * In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 1 ** ~~~ ** * ~~~ * the apparatus dew-point is below the coil design inlet water temperature; ** ~~~ ** * ~~~ * the coil outlet design conditions will be changed to correct the problem. ** ~~~ ** * ~~~ * The initial design conditions are: Tair,in = 25.9901 ** ~~~ ** * ~~~ * Wair,in = 9.862493E-003 ** ~~~ ** * ~~~ * Twater,in = 7.2200 ** ~~~ ** * ~~~ * Tair,out = 9.2200 ** ~~~ ** * ~~~ * Wair,out = 6.585921E-003 ** ~~~ ** * ~~~ * The revised design conditions are: Tair,out = 9.2195 ** ~~~ ** * ~~~ * Wair,out = 6.586107E-003 ** * Warning ** * In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 3 ** ~~~ ** * ~~~ * the apparatus dew-point is below the coil design inlet water temperature; ** ~~~ ** * ~~~ * the coil outlet design conditions will be changed to correct the problem. ** ~~~ ** * ~~~ * The initial design conditions are: Tair,in = 25.9832 ** ~~~ ** * ~~~ * Wair,in = 9.506870E-003 ** ~~~ ** * ~~~ * Twater,in = 7.2200 ** ~~~ ** * ~~~ * Tair,out = 9.2200 ** ~~~ ** * ~~~ * Wair,out = 6.585921E-003 ** ~~~ ** * ~~~ * The revised design conditions are: Tair,out = 9.2195 ** ~~~ ** * ~~~ * Wair,out = 6.586107E-003 ** * Warning ** * Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-1". ** ~~~ ** * ~~~ * No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object. ** ~~~ ** * ~~~ * Check ventilation rate in Controller:MechanicalVentilation object. Simulation will continue. ** * Warning ** * Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-3". ** ~~~ ** * ~~~ * No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object. ** ~~~ ** * ~~~ * Check ventilation rate in Controller:MechanicalVentilation object. Simulation will continue. ** * Warning ** * Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-5". ** ~~~ ** * ~~~ * No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object. ** ~~~ ** * ~~~ * Check ventilation rate in Controller:MechanicalVentilation object. Simulation will continue. ** * Warning ** * SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil has leaving air temperature > entering water temperature. ** ~~~ ** * ~~~ * Tair,out = 12.800 ** ~~~ ** * ~~~ * Twater,in = 82.000 ** ~~~ ** * ~~~ * ....coil leaving air temperature will be reset to: ** ~~~ ** * ~~~ * Tair,out = 82.500 ** * Warning ** * SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil is dry and has air leaving humidity ratio < entering humidity ratio. ** ~~~ ** * ~~~ * Wair,in = 1.549437E-002 ** ~~~ ** * ~~~ * Wair,out = 8.500000E-003 ** ~~~ ** * ~~~ * ....coil leaving humidity ratio will be reset to: ** ~~~ ** * ~~~ * Wair,out = 1.549437E-002 ** * Warning ** * The design cooling capacity is zero for Coil:Cooling:Water COIL COOLING WATER 1 ** ~~~ ** * ~~~ * The maximum water flow rate for this coil will be set to zero and the coil will do no cooling. ** ~~~ ** * ~~~ * Check the following coil design inputs for problems: Tair,in = 30.5044 ** ~~~ ** * ~~~ * Wair,in = 1.549437E-002 ** ~~~ ** * ~~~ * Twater,in = 82.0000 ** ~~~ ** * ~~~ * Tair,out = 82.5000 ** ~~~ ** * ~~~ * Wair,out = 1.549437E-002 ** * Warning ** * Capacity ratio as a function of temperature curve output is not equal to 1.0 ** ~~~ ** * ~~~ * (+ or - 10%) at reference conditions for ChillerHeaterPerformance:Electric:EIR= CHILLERHEATERMODULE ** ~~~ ** * ~~~ * Curve output at reference conditions = 1.166 ** * Warning ** * Energy input ratio as a function of temperature curve output is not equal to 1.0 ** ~~~ ** * ~~~ * (+ or - 10%) at reference conditions for ChillerHeaterPerformance:Electric:EIR= CHILLERHEATERMODULE ** ~~~ ** * ~~~ * Curve output at reference conditions = 0.717 ** * Warning ** * Missing temperature setpoint on cooling side for CentralHeatPumpSystem named CENTRAL HP ** ~~~ ** * ~~~ * A temperature setpoint is needed at the outlet node of a CentralHeatPumpSystem, use a SetpointManager ** ~~~ ** * ~~~ * The overall loop setpoint will be assumed for CentralHeatPumpSystem. The simulation continues ... ** * Warning ** * Missing temperature setpoint on heating side for CentralHeatPumpSystem named CENTRAL HP ** ~~~ ** * ~~~ * A temperature setpoint is needed at the outlet node of a CentralHeatPumpSystem, use a SetpointManager ** ~~~ ** * ~~~ * The overall loop setpoint will be assumed for CentralHeatPumpSystem. The simulation continues ... ** * Warning ** * SizePlantLoop: Calculated Plant Sizing Design Volume Flow Rate=[0.00] is too small. Set to 0.0 ** ~~~ ** * ~~~ * ..occurs for PlantLoop=CONDENSER WATER 2ND LOOP ************* *** Testing Individual Branch Integrity ************* *** All Branches passed integrity testing ************* *** Testing Individual Supply Air Path Integrity ************* *** All Supply Air Paths passed integrity testing ************* *** Testing Individual Return Air Path Integrity ************* *** All Return Air Paths passed integrity testing ************* *** No node connection errors were found. ************* *** Beginning Simulation ************* *** Beginning Simulation

ThanksSimulation

Trouble with the HVAC setting

Dear all,

I am simulation a building using Openstudio and E+. The HVAC system is composted by a multifunctional heat pump (it makes simultaneously heating and cooling), a ground water condenser and cooled beams as air terminals that provided both the cooling and the heating in the zones. I have used the CentralHeatPumpSystem to simulate the multifunctional heat pump. I have used the PlantComponent:TemperatureSource to simulate the ground water used as condenser I have used the FourPipeInduction Air terminals to simulate the cooled beams. I can't understand why the simulation doesn't work properly and I have problems with the sizing of the objects and the convergence of the temperature.

Has someone of you any idea how should I do to solve this issue? I attach the idf below.

Thank you very much

Have a nice day

Elena

part of the error message:

*** Beginning System Sizing Calculations *** Beginning Plant Sizing Calculations * Warning * In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 2 * ~~~ * the apparatus dew-point is below the coil design inlet water temperature; * ~~~ * the coil outlet design conditions will be changed to correct the problem. * ~~~ * The initial design conditions are: Tair,in = 25.9833 * ~~~ * Wair,in = 9.554298E-003 * ~~~ * Twater,in = 7.2200 * ~~~ * Tair,out = 9.2200 * ~~~ * Wair,out = 6.585921E-003 * ~~~ * The revised design conditions are: Tair,out = 9.2195 * ~~~ * Wair,out = 6.586107E-003 * Warning * In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL * ~~~ * no apparatus dew-point can be found for the initial entering and leaving conditions; * ~~~ * the coil outlet design conditions will be changed to correct the problem. * ~~~ * The initial design conditions are: Tair,in = 25.9845 * ~~~ * Wair,in = 1.167724E-002 * ~~~ * Twater,in = 7.2200 * ~~~ * Tair,out = 9.2200 * ~~~ * Wair,out = 6.585921E-003 * ~~~ * The revised design conditions are: Tair,out = 9.2195 * ~~~ * Wair,out = 6.586107E-003 * Warning * In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 1 * ~~~ * the apparatus dew-point is below the coil design inlet water temperature; * ~~~ * the coil outlet design conditions will be changed to correct the problem. * ~~~ * The initial design conditions are: Tair,in = 25.9901 * ~~~ * Wair,in = 9.862493E-003 * ~~~ * Twater,in = 7.2200 * ~~~ * Tair,out = 9.2200 * ~~~ * Wair,out = 6.585921E-003 * ~~~ * The revised design conditions are: Tair,out = 9.2195 * ~~~ * Wair,out = 6.586107E-003 * Warning * In calculating the design coil UA for Coil:Cooling:Water HW CHW FOUR PIPE INDUCTION TERMINAL CHW CLG COIL 3 * ~~~ * the apparatus dew-point is below the coil design inlet water temperature; * ~~~ * the coil outlet design conditions will be changed to correct the problem. * ~~~ * The initial design conditions are: Tair,in = 25.9832 * ~~~ * Wair,in = 9.506870E-003 * ~~~ * Twater,in = 7.2200 * ~~~ * Tair,out = 9.2200 * ~~~ * Wair,out = 6.585921E-003 * ~~~ * The revised design conditions are: Tair,out = 9.2195 * ~~~ * Wair,out = 6.586107E-003 * Warning * Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-1". * ~~~ * No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object. * ~~~ * Check ventilation rate in Controller:MechanicalVentilation object. Simulation will continue. * Warning * Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-3". * ~~~ * No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object. * ~~~ * Check ventilation rate in Controller:MechanicalVentilation object. Simulation will continue. * Warning * Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE5-5". * ~~~ * No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object. * ~~~ * Check ventilation rate in Controller:MechanicalVentilation object. Simulation will continue. * Warning * SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil has leaving air temperature > entering water temperature. * ~~~ * Tair,out = 12.800 * ~~~ * Twater,in = 82.000 * ~~~ * ....coil leaving air temperature will be reset to: * ~~~ * Tair,out = 82.500 * Warning * SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil is dry and has air leaving humidity ratio < entering humidity ratio. * ~~~ * Wair,in = 1.549437E-002 * ~~~ * Wair,out = 8.500000E-003 * ~~~ * ....coil leaving humidity ratio will be reset to: * ~~~ * Wair,out = 1.549437E-002 * Warning * The design cooling capacity is zero for Coil:Cooling:Water COIL COOLING WATER 1 * ~~~ * The maximum water flow rate for this coil will be set to zero and the coil will do no cooling. * ~~~ * Check the following coil design inputs for problems: Tair,in = 30.5044 * ~~~ * Wair,in = 1.549437E-002 * ~~~ * Twater,in = 82.0000 * ~~~ * Tair,out = 82.5000 * ~~~ * Wair,out = 1.549437E-002 * Warning * Capacity ratio as a function of temperature curve output is not equal to 1.0 * ~~~ * (+ or - 10%) at reference conditions for ChillerHeaterPerformance:Electric:EIR= CHILLERHEATERMODULE * ~~~ * Curve output at reference conditions = 1.166 * Warning * Energy input ratio as a function of temperature curve output is not equal to 1.0 * ~~~ * (+ or - 10%) at reference conditions for ChillerHeaterPerformance:Electric:EIR= CHILLERHEATERMODULE * ~~~ * Curve output at reference conditions = 0.717 * Warning * Missing temperature setpoint on cooling side for CentralHeatPumpSystem named CENTRAL HP * ~~~ * A temperature setpoint is needed at the outlet node of a CentralHeatPumpSystem, use a SetpointManager * ~~~ * The overall loop setpoint will be assumed for CentralHeatPumpSystem. The simulation continues ... * Warning * Missing temperature setpoint on heating side for CentralHeatPumpSystem named CENTRAL HP * ~~~ * A temperature setpoint is needed at the outlet node of a CentralHeatPumpSystem, use a SetpointManager * ~~~ * The overall loop setpoint will be assumed for CentralHeatPumpSystem. The simulation continues ... * Warning * SizePlantLoop: Calculated Plant Sizing Design Volume Flow Rate=[0.00] is too small. Set to 0.0 * ~~~ * ..occurs for PlantLoop=CONDENSER WATER 2ND LOOP *** Testing Individual Branch Integrity *** All Branches passed integrity testing *** Testing Individual Supply Air Path Integrity *** All Supply Air Paths passed integrity testing *** Testing Individual Return Air Path Integrity *** All Return Air Paths passed integrity testing *** No node connection errors were found. *** Beginning Simulation *** Beginning Simulation

Trouble with the HVAC setting

Dear all,

I am simulation a building using Openstudio and E+. The HVAC system is composted by a multifunctional heat pump (it makes simultaneously heating and cooling), a ground water condenser and cooled beams as air terminals that provided both the cooling and the heating in the zones. I have used the CentralHeatPumpSystem to simulate the multifunctional heat pump. I have used the PlantComponent:TemperatureSource to simulate the ground water used as condenser I have used the FourPipeInduction Air terminals to simulate the cooled beams. I can't understand why the simulation doesn't work properly and I have problems with the sizing of the objects and the convergence of the temperature.

Has someone of you any idea how should I do to solve this issue? I attach the idf below.

Thank you very much

Have a nice day

Elena