anchor.diff:  Activation curve,Q_thermal_storage_total_W,W,Yearly cooling load by thermal storage,purple
   Activation curve,E_PV_to_directload_MWhyr,MWh/yr,PV generation to direct load,yellow
   
  -Activation curve,E_ACH_total_W,W,Yearly electricity requirement of ACH,blue_light
  -Activation curve,E_VCC_total_W,W,Yearly electricity requirement of VCC,red_light
  -Activation curve,E_VCC_backup_total_W,W,Yearly electricity requirement of backup VCC,green_light
  +
   Activation curve,E_hotwater_total_W,W,Yearly electricity requirement of hot water demand,grey_light
   Activation curve,E_building_appliances_total_W,W,Yearly electricity requirement of building appliance,purple_light
   Activation curve,NG_used_total_W,W,Natural gas usage for CHP-CCGT,brown_light
  
positive.code: Requirements curve,Edata_req_W,W,End-use servers electricity demand,green_light
  Requirements curve,Eal_req_W,W,End-use appliances electricity demand,green
  Requirements curve,Eaux_req_W,W,End-use auxiliary electricity demand,yellow
  Requirements curve,E_hs_ww_req_disconnected_W,W,Electricity due to decentralized heating,green
  Requirements curve,E_cs_cre_cdata_req_disconnected_W,W,Electricity due to decentralized cooling,yellow
  Requirements curve,E_hs_ww_req_connected_W,W,Electricity due to decentralized heating (buildings connected to district network),green
  Requirements curve,E_cs_cre_cdata_req_disconnected_W,W,Electricity due to decentralized cooling (buildings connected to district network),yellow
  
  demand,E_sys_kWh,kWh,End-use electricity demand,green
  demand,E_sys_MWhyr,MWh/yr,End-use electricity demand,green
  
negative.code: Activation curve,E_BaseBoiler_req_W,W,Auxiliary electricity for base boiler,orange_light
  Activation curve,E_PeakBoiler_req_W,W,Auxiliary electricity for peak boiler,grey
  Activation curve,E_BackupBoiler_req_W,W,Auxiliary electricity for back-up boiler,red
  
  
  Activation curve,E_BaseVCC_WS_req_W,W,Demand of Water-source base VCC,green_light
  Activation curve,E_PeakVCC_WS_req_W,W,Demand of Water-source peak VCC,green_light
  Activation curve,E_BaseVCC_AS_req_W,W,Demand of Air-source base VCC,green_light
  Activation curve,E_PeakVCC_AS_req_W,W,Demand of Air-source peak VCC,green_light
  Activation curve,E_BackupVCC_AS_req_W,W,Demand of Air-source backup VCC,green_light
  
  Activation curve,E_aux_storage_solar_and_heat_recovery_req_W,W,Auxiliary electricity of thermal storage,green
  Activation curve,E_total_req_W,W,Electricity required by the district energy system,black
  