Page 36 - Advanced Course
P. 36
KNX ADVANCED COURSE
The comparison of the individual types of primary energy is carried out via the calorific
value.
Table 1
Fuel oil 10.0 kWh/l
City gas 4.5 kWh/m³
Natural gas L 9.0 kWh/m³
Natural gas H 10.5 kWh/m³
Crushed coke 8.0 kWh/kg
Brown coal briquettes 5.5 kWh/kg
Brown coal coke 8.0 kWh/kg
The structure of a heating system consists of the following components
Heat generation
Heat transfer
Heat consumption
Constant temperature Variable temperature Variable temperature
Domestic hot water storage heating circuit heating circuit heating circuit
HWS HC VHC1 VHC2
T
ET
HWRS FTS FTS FTS
T T T
HWTS SHP SHP SHP
T
M M
MV MV
HWP
FTS T
BTS PHP
T
RTS
Boiler T
M
MV Expansion vessel
Figure 8: Example of a single boiler system with domestic hot water storage, a direct
heating circuit and two variable temperature heating circuits
Home and Building Management Systems KNX Association
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