## Commercial Overview

## Using the Office

### Default Office

The "default office" is an incomplete construct. The minimum definition for an office object includes

object office{ floor_height 6 ft; floor_area 4000 sf; interior_mass 2000; interior_UA 2.0; exterior_UA 2.0; hvac.cooling.capacity -4500; // must be negative hvac.heating.capacity 4500; }

### Office Schedule

The office has a built-in occupancy schedule subsystem that is used to determine the minimum air change coefficient. This subsystem parses a string and constructs a bitfield for the hours of each day that the building should be occupied. By default, office buildings are occupied from 8am to 5pm local time, Monday through Friday.

The format for the office schedule consists of two parts, the day and the hours, in a semicolon delimited list. The default string is "1-5 8-17". The first part is the range for the days of the week, with 0 being Sunday, 1 for Monday, etc. The hours are numbered 0-23 and reflect a 24 hour clock. Multiple schedule elements can be aggregated with an OR operation by seperating them with semicolons. For example, "1-4 8-17; 5 8-20; 6 8-23; 0 8-20" would define an 8-5 schedule Mon-Thur, 8-8 on Friday, 8am-11pm on Saturday, and 8-8 on Sunday.

### Properties

Property Name | Type | Unit | Description |
---|---|---|---|

floor_area | double | ft^2 | Floor area of the office (presuming one floor) |

floor_height | double | ft | Ceiling height within the office interior |

exterior_ua | double | BTU/degF/hr | Exterior thermal resistance |

interior_ua | double | BTU/degF/hr | Interior thermal resistance |

interior_mass | double | BTU/degF | ... |

glazing | double | ft^2 | ... |

glazing.north | double | ft^2 | ... |

glazing.northeast | double | ft^2 | ... |

glazing.east | double | ft^2 | ... |

glazing.southeast | double | ft^2 | ... |

glazing.south | double | ft^2 | ... |

glazing.southwest | double | ft^2 | ... |

glazing.west | double | ft^2 | ... |

glazing.northwest | double | ft^2 | ... |

glazing.horizontal | double | ft^2 | ... |

glazing.coefficient | double | per unit | ... |

occupancy | double | - | Current occupancy ratio |

occupants | double | people | Total occupants for the office |

schedule | char256 | - | Schedule string. Semicolon delimited cron-style schedule definition. |

air_temperature | double | degF | Office interior air temperature |

mass_temperature | double | degF | Office interior mass temperature |

temperature_change | double | degF/hr | ... |

Qh | double | BTU/hr | ... |

Qs | double | BTU/hr | ... |

Qi | double | BTU/hr | ... |

Qz | double | BTU/hr | ... |

hvac_mode | enumeration | - | Current mode of the HVAC system. HEAT, AUX, COOL, ECON, VENT, or OFF. |

hvac.cooling.balance_temperature | double | degF | The balance temperature of the HVAC cooler |

hvac.cooling.capacity | double | BTU/hr | The constant heat output capacity of the HVAC cooler (should be negative) |

hvac.cooling.capacity_perF | double | BTU/degF/hr | The temperature-dependent heat output capacity of the HVAC cooler (should be negative) |

hvac.cooling.design_temperature | double | degF | The design temperature of the HVAC cooler |

hvac.cooling.efficiency | double | - | The cooling efficiency of the HVAC cooler |

hvac.cooling.cop | double | - | Coefficient of performance of the HVAC cooler |

hvac.heating.balance_temperature | double | degF | The balance temperature of the HVAC heater |

hvac.heating.capacity | double | BTU/hr | The constant heat output capacity of the HVAC heater |

hvac.heating.capacity_perF | double | BTU/degF/hr | The temperature-dependent heat output capacity of the HVAC heater |

hvac.heating.design_temperature | double | degF | The design temperature of the HVAC heater |

hvac.heating.efficiency | double | BTU/W | The heating efficiency of the HVAC heater |

hvac.heating.cop | double | - | Coefficient of performance of the HVAC heater |

lights.capacity | double | kW | Total power of the lights installed in the office |

lights.fraction | double | - | The fraction of the installed lights that are turned on |

plugs.capacity | double | kW | Total power of the devices plugged into wall sockets |

plugs.fraction | double | - | The current fraction of the total power draw from the various devices |

demand | complex | kW | Aggregate peak power draw from the office |

total_load | complex | kW | Current aggregate power draw from the office |

energy | complex | kWh | Accumulated energy consumed by the office |

power_factor | complex | - | ... |

power | complex | kW | Constant power component of the office load |

current | complex | A | Constant current component of the office load |

admittance | complex | 1/Ohm | Constant resistance component of the office load |

hvac.demand[kW] | complex | kW | ... |

hvac.load[kW] | complex | kW | ... |

hvac.energy | double | kWh | ... |

hvac.power_factor | complex | - | ... |

lights.demand[kW] | complex | kW | ... |

lights.load[kW] | complex | kW | ... |

lights.energy | complex | kWh | ... |

lights.power_factor | double | - | ... |

plugs.demand[kW] | complex | - | ... |

plugs.load[kW] | complex | - | ... |

plugs.energy | complex | - | ... |

plugs.power_factor | double | - | ... |

cooling_setpoint | double | - | ... |

heating_setpoint | double | - | ... |

thermostat_deadband" | double | - | ... |

control.ventilation_fraction | double | - | ... |

control.lighting_fraction | double | - | ... |