User’s Guide | TOTEM 10 - TOTEM 20
24 of 30
D.
Operating Conditions
Under standard operating conditions, the units work under fixed point steady state
mode.
Electric power output is equal to10 and 20 kW, respectively.
Thermal power
depends on user water inlet temperature and it can range from 20 to
22 kW and from 42 to 47.5 kW, for the two models respectively.
Inlet temperature can vary from a maximum of 72°C to 35°C. Water flow rate must
be between 2 and 4 m
3
/h. Outlet temperature depends on inlet temperature and
flow rate. Thermal gradient can vary from 5 to 11°C according to water flow rate.
Methane feeding pressure must be in the range of /- 5%.
Engine exhaust fumes temperature is approximately 720° for the TOTEM 20 and
620°Cfor the TOTEM 10. Fumes stack temperature is comprised between 60 and
80°C.
E.
Fuel Characteristics
The TOTEM can run on natural grid gas. Said fuel gas must fulfill the requirements of
quality for natural gas.
The parameters for Quality Control are listed hereunder:
Higher Heating Value (HHV): 34.95÷45.28 MJ/Sm
3
Wobbe Index:47.31÷52,33
Relative density: 0.5548÷0.8
Oxygen: < 0.6 %mol
Water dew point: <= -5°C
Hydrocarbon dew point:<=0°C
Max temperature: <50°C
Carbon dioxide: <= 3%mol
Polluting compounds are tolerated within the following thresholds:
Hydrogen Sulphide<= 6.6 mg/Sm
3
Mercaptans<= 15.5 mg/Sm
3
Total Sulphur<= 150 mg/Sm
3
Under operating conditions, the gas used must not contain traces of water or liquid
state hydrocarbons, solid particulate matter or other elements that may impact
safety.
Gas pressure at the TOTEM inlet must be higher than10 mbar. Lower pressure values
may generate an error alert.
The natural gas consumption data shown in the technical datasheets refer to natural
grid gas with a Lower Heating Value of 10 kWh/Nm3 (PCS 11.25 kWh/Nm
3
).
