These variables are accessed by clicking on ‘Model’ in the browser. They are organized in three groups: Loads, Energy and Carbon.
Loads
- Room heating plant sens. load: The sum of the room heating plant sensible loads for all rooms in the building.
- ApHVAC room units heating load: When an ApacheHVAC system is in use, the sum of the heating loads on all radiators and direct acting heaters.
- Room hum. plant load: The sum of the room humidification plant sensible loads for all rooms in the building.
- System air heating load: The total of the system air heating loads for all Apache Systems.
- Aux vent heating load: The total auxiliary ventilation heating load for the building (handled by Apache Systems).
- ApHVAC heating coils load: When an ApacheHVAC system is in use, the sum of the heating loads on all heating coils.
- ApHVAC steam humidifiers load: When an ApacheHVAC system is in use, the sum of the loads on all steam humidifiers.
- Boilers load: The sum of the loads (outputs) for all boilers (in both Apache Systems and ApacheHVAC systems).
- ApHVAC heat pumps load: When an ApacheHVAC system is in use, the sum of the loads on all heat pumps.
- Room cooling plant sens. load: The sum of the room cooling plant sensible loads for all rooms in the building.
- ApHVAC room units cooling load: When an ApacheHVAC system is in use, the sum of the cooling loads on all direct acting coolers and chilled beams.
- Room dehum. plant load: The sum of the dehumidification plant sensible loads for all rooms in the building.
- System air sens. clg load: The total of the system air sensible cooling loads for all Apache Systems.
- System air lat. clg. load: The total of the system air latent cooling loads for the building (handled by Apache Systems).
- Aux vent sens. clg. load: The total auxiliary ventilation sensible cooling load for the building (handled by Apache Systems).
- Aux vent lat. clg. load: The total auxiliary ventilation latent cooling loads for the building (handled by Apache Systems).
- ApHVAC cooling coils load: When an ApacheHVAC system is in use, the sum of the cooling loads on all cooling coils (including any latent component).
- Chillers load: The sum of the loads (outputs) for all chillers (in both Apache Systems and ApacheHVAC systems).
- ApHVAC recovered sensible heat: When an ApacheHVAC system is in use, the net sensible heat (or if negative, net sensible cooling) recovered by heat recovery components.
- ApHVAC recovered latent heat: When an ApacheHVAC system is in use, the net latent heat (or if negative, net latent cooling) recovered by heat recovery components.
- DHW heating demand: The total DHW heating demand at the hot water outlets (i.e. excluding pipe and tank losses) calculated on the basis of a 50K temperature rise from the cold water main.
- CH[C]P generated heat: The heat contributed by the CHP plant, if present. This heat is assumed to be input at the same point as heat from boilers – i.e. upstream of distribution losses.
Energy
- Boilers energy: The total energy consumption for boilers (in both Apache Systems and ApacheHVAC systems).
- Chillers energy: The total energy consumption for chillers (in both Apache Systems and ApacheHVAC systems).
- ApHVAC direct acting heaters energy: When an APhvac system is in use, the energy consumption for direct acting heaters.
- ApHVAC direct acting coolers energy: When an APhvac system is in use, the energy consumption for by direct acting coolers (direct acting heaters working in cooling mode).
- ApHVAC heat pumps energy: When an APhvac system is in use, the energy consumption for heat pumps.
- ApHVAC fans energy: The total energy consumption for fans (in both Apache Systems and ApacheHVAC systems).
- ApHVAC pumps energy: The total energy consumption for central plant pumps (in both Apache Systems and ApacheHVAC systems).
- ApHVAC HR & spray pumps energy: When an APhvac system is in use, the total energy consumption for heat recovery components and spray pumps.
- Ap Sys fans/pumps/ctrls energy: Energy consumed by fans, pumps and controls within Apache Systems. Includes auxiliary energy, chiller heat rejection pump energy, and pump energy associated with DHW and solar water heating systems.
- PV generated electricity: Electricity generated by a photovoltaic system, if present. Negative by convention.
- Wind generated electricity: Electricity generated by a wind turbine, if present. Negative by convention.
- CHP energy consumption: The energy consumed by the CHP plant, if present. This includes energy associated with space heating, domestic hot water and absorption cooling.
- CHP generated electricity: Electricity generated by a CHP system, if present. Negative by convention.
- System electricity: The system electrical energy consumption.
- System <fuel>: The system energy consumption associated with the named fuel. In the case of grid displaced electricity includes a negative contribution from any electricity generated by PV, wind turbine and CHP systems.
- Total system energy: The total system energy consumption, calculated as the sum of the energy consumptions for system components, or alternatively as the sum of system fuel consumptions. Includes a negative contribution from any electricity generated by PV, wind turbine and CHP systems.
- Equipment electricity: Electrical energy consumption associated with equipment gains (internal gains excluding lighting). This variable is not reduced by electricity generation by PV, wind turbines and CHP systems
- Equipment <fuel>: Energy consumption associated with equipment gains (internal gains excluding lighting) using the named fuel. This variable is not reduced by electricity generation by PV, wind turbines and CHP systems
- Total equipment energy: Total energy consumption associated with equipment gains (internal gains excluding lighting). This variable is not reduced by electricity generation by PV, wind turbines and CHP systems
- Lights electricity: Electrical energy consumption associated with lighting. This variable is not reduced by electricity generation by PV, wind turbines and CHP systems.
- Lights <fuel>: Energy consumption associated with lighting. This variable is not reduced by electricity generation by PV, wind turbines and CHP systems.
- Total lights energy: Total energy consumption associated with lighting. This variable is not reduced by electricity generation by PV, wind turbines and CHP systems.
- Total electricity: Total electrical energy consumption for systems, lights and small power. This variable is not reduced by electricity generation by PV, wind turbines and CHP systems.
- Total <fuel>: Total energy consumption for systems, lights and small power using the named fuel. In the case of the ‘fuel’ grid displaced electricity – electricity generated by PV, wind turbine and CHP systems – the variable is negative by convention.
- Total energy: Total energy consumption for systems, lights and small power. Includes a negative contribution from any electricity generated by PV, wind turbine and CHP systems.
- Carbon
- System elec. CE: Carbon emissions produced by system electrical consumption.
- System <fuel> CE: Carbon emissions produced by consumption of the named fuel by systems. In the case of grid displaced electricity includes a negative contribution from any electricity generated by PV, wind turbine and CHP systems.
- Total system CE: Total carbon emissions produced by systems. Includes a negative contribution from any electricity generated by PV, wind turbine and CHP
Carbon
- Equipment elec. CE: Carbon emissions produced by electrical energy consumption associated with equipment gains (internal gains excluding lighting).
- Equipment <fuel> CE: Carbon emissions associated with equipment gains (internal gains excluding lighting) powered by the named fuel.
- Total equipment CE: Total carbon emissions associated with equipment gains (internal gains excluding lighting).
- Total electricity CE: Total carbon emissions associated with electrical energy consumption for systems, lights and small power. This variable is not reduced by electricity generation by PV, wind turbines and CHP systems.
- Total <fuel> CE: Total carbon emissions associated with consumption of the named fuel. In the case of grid displaced electricity – electricity generated by PV, wind turbine and CHP systems – the variable is negative by convention.
- Total CE : Total carbon emissions for the building and its systems. Includes a negative contribution from any electricity generated by PV, wind turbine and CHP systems.
- Total CE ex equip : Total carbon emissions for the building and its systems, excluding emissions associated with equipment (which do not feature in the emission calculations for the UK Building Regulations). Includes a negative contribution from any electricity generated by PV, wind turbine and CHP systems.