Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
So I was using the default Capstone C65 Generator:MicroTurbine from the example file called HeatRecoveryPlantLoop.idf.
The problem is that in the ElectricLoadCenter:Generators list, there is no 'Rated Thermal to Electrical Power Ratio' specified for the Capstone C65 unit. It might not have been a problem in past EnergyPlus version, but it is one in E+ 8.3 and 8.4.
Once I specified the Rated Thermal to Electrical Power Ratio, the generator suddenly came online.
!- =========== ALL OBJECTS IN CLASS: ELECTRICLOADCENTER:GENERATORS ===========
ElectricLoadCenter:Generators,
Capstone C65 Generator, !- Name
Capstone C65, !- Generator 1 Name
Generator:MicroTurbine, !- Generator 1 Object Type
65000, !- Generator 1 Rated Electric Power Output {W}
Always On Discrete, !- Generator 1 Availability Schedule Name
1.72; !- Generator 1 Rated Thermal to Electrical Power Ratio
| | 2 | No.2 Revision |
So I was using the default Capstone C65 Generator:MicroTurbine from the example file called HeatRecoveryPlantLoop.idf.
The problem is that in the ElectricLoadCenter:Generators list, there is no 'Rated Thermal to Electrical Power Ratio' specified for the Capstone C65 unit. It might not have been a problem in past EnergyPlus version, but it is one in E+ 8.3 and 8.4.This example file uses Baseload as an operation scheme, while I was trying to use FollowThermal
Once I specified the Rated Thermal to Electrical Power Ratio, the generator suddenly came online.
The Input/Output reference actually has it written black and white, but it's easy to overlook.
In ElectricLoadCenter:Generators, field Generator <x> Rated Thermal to Electrical Power Ratio:
This numeric field contains the ratio of the rated thermal output to the rated electric output. It is only needed and used if the operation scheme is set to FollowThermal or FollowThermalLimitElectrical. This nominal ratio is only used for control and dispatch decisions. This value should be generally consistent with the more detailed performance input for the individual generator component models but it is not used in those component models.
FollowThermal or FollowThermalLimitElectrical you MUST specify a Rated Thermal to Electrical Power Ratio.!- =========== ALL OBJECTS IN CLASS: ELECTRICLOADCENTER:GENERATORS ===========
ElectricLoadCenter:Generators,
Capstone C65 Generator, !- Name
Capstone C65, !- Generator 1 Name
Generator:MicroTurbine, !- Generator 1 Object Type
65000, !- Generator 1 Rated Electric Power Output {W}
Always On Discrete, !- Generator 1 Availability Schedule Name
1.72; !- Generator 1 Rated Thermal to Electrical Power Ratio
