Introduction and Structure - Renewable Energy: Technology, Economics and Environment - page 21

Table 1.6 Parameters of the assessed heat generation systems based on fossil fuel energy
Demand case SFH-I SFH-II SFH-III MFH

Hot water demand 64.1

432
67
FO a
LT-BB d
15
93
90
553.5
800
a domestic fuel oil; b condensing boiler; c atmospheric low temperature gas-fired boiler; d low tempera-
ture oil-fired boiler with blue burner; e burner, boiler, and hot water storage; f in addition to the boiler
efficiency the system efficiency also considers the losses of domestic hot water generation system;
g including losses; h natural gas.

in GJ/a 10.7

22
5
NG h
CB b
15
104
95
34.5
160

10.7
45
8
NG h
CB b
15
104
98
56.6
160

10.7
45
9
NG h
LT c
15
93
88
63.2
160

10.7
108
18
NG h
CB b
15
104
101
117.2
160

10.7
108
20
FO a
LT-BB d
15
93
91
131
160

64.1
432
60
NG h
CB b
15
104
100
495.5
800

Heat demand in GJ/a

Boiler capacity in kW

Fuel
Technology
Technical life time e in a

Boiler efficiency in %

System efficiency f in %

Fuel input g in GJ/a

Hot water storage in l

To estimate the costs of heat generation based on fossil fuel energy, in the fol-
lowing investment and operation costs as well as the specific heat provision costs
are outlined for the reference systems defined in Table 1.6.

Investments and operation costs. To determine the investment costs the expenses
for the boiler, the burner, the domestic hot water storage, civil engineering struc-
tures (e.g. furnace room design, chimney, oil tank, connection to the natural gas
grid) as well as assembly and installation costs (Table 1.7) have been considered
for the systems indicated in Table 1.6.

Table 1.7 Heat provision costs
Demand case
Boiler capacity in kW
Technology

SFH-I
5
CB a

SFH-II
8
CB a

SFH-II
8
LT b

SFH-III
18
CB a

SFH-III
20
LT-BB c

MFH
60
CB a

MFH
67
LT-BB c

Investments
Boiler, burner etc. in € 2,800

2,600
830
6,230
225
575

2,800
2,600
830
6,230
233
943

2,600
2,600
830
6,030
174
1,053

3,100
2,600
830
6,530
283
1,953

3,000
3,200
950
7,150
349
1,965

7,000
5,880
1,180
14,060
422
8,258

7,000
6,200
1,200
14,400
422
8,303

Tank, chimney etc. in €

Assembly, installation in €

Total in €

Operation costs in €/a

Fuel costs in €/a

Heat provision costs 18.2

0.065
a gas condensing boiler; b atmospheric low temperature natural gas-fired boiler; c low temperature oil-
fired boiler with blue flame burner.

in €/GJ 40.0

0.144

31.0
0.112

28.3
0.102

24.3
0.087

22.7
0.082

20.2
0.073 in €/kWh

The operation costs of the assessed heat provision plants include, among other
costs, expenses for maintenance and repair, as well as for electric power required
for plant operation (including, among others, burner, fan, and self-ignition sys-
tem). In addition, fuel costs have to be taken into consideration. They are shown
separately from the other operation costs within Table 1.7.