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On this page, we’ve put together some model calculations to demonstrate just how much money you can save and how quickly an optimally scaled thermal power plant can pay for itself when used properly.
Example calculations for a hotel with a 6.5 KU-EG (6.5 kW electricity output) Cogenon thermal power plant
Hotel with 23 beds and a wellness area, built in 1973.
Heating system to date: Gas-powered furnace
|
Situation without thermal power plant |
| |
Consumption (kWh) |
Price (EUR/kWh) |
Costs (EUR) |
| Gas consumption furnace |
150,000 |
0.056 |
-8,420 |
| Power consumption (covered by utility) |
45,000 |
0.172 |
-7,755 |
| Total energy costs |
|
|
-16,175 |
| Results with thermal power plant |
| |
Consumption (kWh) |
Price(EUR/kWh) |
Costs (EUR) |
| Gas consumption thermal power plant |
146,000 |
0.051 1 |
-7,446 |
| Gas consumption furnace |
47,000 |
0.056 |
-2,632 |
| Gas consumption total |
193,000 |
|
-10,078 |
| |
|
|
|
| Power consumption |
45,000 |
|
|
| Power production thermal power plant |
38,000 |
|
|
| Own use |
34,200 |
0.051 2 |
1,748 |
| Fed into public utility network |
3,800 |
0.110 3 |
418 |
Additional consumption requirements
(by utility) |
7,000 |
0.172 |
-1,204 |
| Surplus from electricity production by thermal power plant |
|
|
962 |
| |
|
|
|
| Total costs with thermal power plant |
|
|
-9,116 |
| Costs for „worry-free“ maintenance package |
|
|
-1,250 |
| Total operating cost with thermal power plant |
|
|
-10,366 |
| |
|
|
|
| Savings |
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|
5,809 |
| |
|
|
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Total investment cost
(turn-key system) |
|
|
23,500 |
| |
|
|
|
| Amortization time |
|
|
3.91 years |
1 Lower energy prices due to tax refund 2 Guaranteed payment for CHP law for own-use cogeneration power 3 Guaranteed payment for CHP law plus kWh price of the Leipzig Power Exchange
Example calculation for a furniture store with a Cogenon CO 50 LH-EG (50 kW electricity output)
Furniture retailer with a gas furnace, purpose-built building from the 1970’s
| Situation without thermal power plant |
| |
Consumption (kWh) |
Price (EUR/kWh) |
Costs (EUR) |
|
Gas consumption furnace |
744,000 |
0.056 |
-41,664 |
|
Power consumption (covered by utility) |
519,000 |
0.170 |
-88,230 |
|
Total energy costs |
|
|
-129,894 |
|
Results with thermal power plant |
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Consumption (kWh) |
Price (EUR/kWh) |
Costs (EUR) |
| Gas consumption thermal power plant |
818,501 |
0.051 1 |
-41,744 |
| Gas consumption furnace |
164,170 |
0.056 |
-9,194 |
| Gas consumption total |
982,671 |
|
-50,938 |
| |
|
|
|
| Power consumption |
519,000 |
|
|
| Power generation thermal power plant |
263,559 |
|
|
| Own use |
244,608 |
0.051 2 |
12,475 |
| Fed into public utility network |
18.951 |
0.110 3 |
2,084 |
| Additional consumption requirements (by utility |
254,392 |
0.170 |
-43,247 |
| Surplus from electricity generated by thermal power plant |
|
|
43,729 |
| |
|
|
|
| Total energy costs |
|
|
-86,385 |
| Costs for „worry-free“ maintenance package |
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|
-9,920 |
| Total operating costs with thermal power plant |
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|
-96,305 |
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|
|
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| Savings |
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|
33,809 |
| |
|
|
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Total investment
(turn-key system) |
|
|
85,850 |
| |
|
|
|
| Amortization time |
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|
2.48 years |
1 Lower energy prices due to tax refund 2 Guaranteed payment for CHP law for own-use cogeneration power 3 Guaranteed payment for CHP law plus kWh price of the Leipzig Power Exchange
Example calculation for foodstuff producer with a Cogenon thermal power plant CO 140 LH-EG (140 kW electricity production)
Foodstuff production facility with high demand for heat and electricity in an old factory hall (built around 19
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Situation without thermal power plant |
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Consumption (kWh) |
Preis (EUR/kWh) |
Kosten (EUR) |
|
Gas consumption furnace |
1,899,750 |
0.050 |
-94,988 |
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Power consumption (covered by utility) |
1,027,600 |
0.123 |
-125,881 |
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Total energy costs |
|
|
-220,869 |
| Ergebnis mit BHKW |
| |
Consumption (kWh) |
Preis (EUR/kWh) |
Kosten (EUR) |
| Gas consumption thermal power plant |
2,800,880 |
0.045 1 |
-124,639 |
| Gas consumption furnace |
84,770 |
0.050 |
-4,239 |
| Total gas consumption |
2,885,650 |
|
-128,878 |
| |
|
|
|
| Power consumption |
1,027,600 |
|
|
| Power generation thermal power plant |
1,069,908 |
|
|
| Own use |
495,000 |
0.051 2 |
25,295 |
| Fed into public utility network |
261,998 |
0.110 3 |
28,820 |
Additional consumption requirements
(covered by utility) |
313,290 |
0.123 |
-38,535 |
| Surplus from electricity generated by thermal power plant |
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|
15,580 |
| |
|
|
|
| Total energy costs with thermal power plant |
|
|
-113,298 |
| Cost for „worry-free“ maintenance package |
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|
-30,000 |
| Total operating cost with thermal power plant |
|
|
-143,298 |
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|
|
|
| Savings |
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|
77,570 |
| |
|
|
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Total investment
(sturn-key system) |
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|
202,000 |
| |
|
|
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| Amortization time |
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|
2.60 years |
1 Lower energy prices due to tax refund 2 Guaranteed payment for CHP law for own-use cogeneration power 3 Guaranteed payment for CHP law plus kWh price of the Leipzig Power Exchange
Hotel with 23 beds and a wellness area, built in 1973. Heating system to date: Gas-powered furnace
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Nartenstraße 14a