Unmet Hours - RSS feedhttp://unmethours.com/questions/Question-and-Answer Resource for the Building Energy Modeling CommunityenTue, 03 Jul 2018 07:54:57 -0500How to control latent cooling energy for CoilSystem:Cooling:DXhttp://unmethours.com/question/32525/how-to-control-latent-cooling-energy-for-coilsystemcoolingdx/I am modelling energy model using `CoilSystem:Cooling:DX` which is generated by Honeybee using 4.Packaged Single Zone-HP assigned by Assign HVAC system component.
When I investigate result, almost half of the cooling energy treated by cooling coil is latent(39MWh for latent,41MWh for sensible) even though I have not implemented any humidity control using `ZoneControl:Humidistat`
Since cooling energy is much bigger than I expected and building program is residential which dont control humidity, I want to reduce latent cooling energy. I tried to specify `Dehumidification Cotrol Type` to None and `Run on Sensible Load` to yes. However, still cooling energy is same.
Does anyone know what parameter I can change to control latent cooling energy treated by cooling coil?
Also where can I find documentation explaining how they are calculating latent load treated by cooling coil?
**CoilSystem:Cooling:DX**
CoilSystem:Cooling:DX,
Coil Cooling DX Single Speed 1 CoilSystem, !- Name
Always On Discrete, !- Availability Schedule Name
Node 13, !- DX Cooling Coil System Inlet Node Name
Node 14, !- DX Cooling Coil System Outlet Node Name
Node 14, !- DX Cooling Coil System Sensor Node Name
Coil:Cooling:DX:SingleSpeed, !- Cooling Coil Object Type
Coil Cooling DX Single Speed 1, !- Cooling Coil Name
None, !- Dehumidification Control Type
Yes; !- Run on Sensible Load
**Coil:Cooling:DX:SingleSpeed**
Coil:Cooling:DX:SingleSpeed,
Coil Cooling DX Single Speed 1, !- Name
Always On Discrete, !- Availability Schedule Name
Autosize, !- Gross Rated Total Cooling Capacity {W}
Autosize, !- Gross Rated Sensible Heat Ratio
3, !- Gross Rated Cooling COP {W/W}
Autosize, !- Rated Air Flow Rate {m3/s}
773.3, !- Rated Evaporator Fan Power Per Volume Flow Rate {W/(m3/s)}
Node 13, !- Air Inlet Node Name
Node 14, !- Air Outlet Node Name
Curve Biquadratic 1, !- Total Cooling Capacity Function of Temperature Curve Name
Curve Quadratic 1, !- Total Cooling Capacity Function of Flow Fraction Curve Name
Curve Biquadratic 2, !- Energy Input Ratio Function of Temperature Curve Name
Curve Quadratic 2, !- Energy Input Ratio Function of Flow Fraction Curve Name
Curve Quadratic 3, !- Part Load Fraction Correlation Curve Name
, !- Minimum Outdoor Dry-Bulb Temperature for Compressor Operation {C}
, !- Nominal Time for Condensate Removal to Begin {s}
, !- Ratio of Initial Moisture Evaporation Rate and Steady State Latent Capacity {dimensionless}
, !- Maximum Cycling Rate {cycles/hr}
, !- Latent Capacity Time Constant {s}
, !- Condenser Air Inlet Node Name
AirCooled, !- Condenser Type
0, !- Evaporative Condenser Effectiveness {dimensionless}
Autosize, !- Evaporative Condenser Air Flow Rate {m3/s}
Autosize, !- Evaporative Condenser Pump Rated Power Consumption {W}
0, !- Crankcase Heater Capacity {W}
0, !- Maximum Outdoor Dry-Bulb Temperature for Crankcase Heater Operation {C}
, !- Supply Water Storage Tank Name
, !- Condensate Collection Water Storage Tank Name
0, !- Basin Heater Capacity {W/K}
10; !- Basin Heater Setpoint Temperature {C}katsuya.obaraTue, 03 Jul 2018 07:54:57 -0500http://unmethours.com/question/32525/