future:solar feasibility study of solar energy supply systems · pdf filefuture:solar –...

Institut für Gebäude- und Solartechnik Prof. Dr.-Ing. M. Norbert Fisch

Mühlenpfordtstraße 23 D-38106 Braunschweig

www.tu-braunschweig.de/igs

Munich, 18.06.2013

future:solar – Feasibility study of solar energy supply systems

Univ. Prof. Dr.-Ing. M. Norbert Fisch Dipl.-Ing. Mathias Schlosser, Dipl.-Ing. Sven Reiser, Dipl. Wirt.-Ing. Peter Ruschin

Intersolar 2013 - Munich

July 5, 2013 | future:solar – feasibility study of solar energy supply | page 2


content

objectives

structure of project

buildings and settlements

energy supply systems

energy balances

cost analysis

next steps

conclusions

future:solar - content



future:solar – objectives

50 % up to 100 %

renewable energy supply of buildings

annual balances



Solar thermal and / or PV?

future:solar – objectives



system

definition building design

building modeling

and simulation

energy supply

system modeling

and simulation

energy and

cost analysis

load profiles

invest

&

maintenance

end energy profiles

future:solar – structure of project



future:solar - buildings and settlements

single family multi family settlement

new construction

living space: 140 m2

pers.: 4

living sp.: 613 m2

pers.: 17 / 8 flats

living sp.: 27.300 m2

365 flats

renovation

living space.: 140 m2

pers.: 4

living sp.: 416 m2

pers.: 12 / 6 flats

living sp.: 12.000 m2

185 flats

capacity

0,3 m³



future:solar – supply systems single family houses

System type 1 2 3 4 5 6

description gas boiler

ST + PV

heat pump

PV

CHP

PV

biomass

ST + PV

electric heater

ST + PV

district heating

PV*

grid

heating

system

renewable

energy

*PE-factor =0,7



System type 1: gas boiler + ST + PV / new single family house


PV

3,2 kWp

(~22 m²)

ST

8,4 kWp

(~12 m²)

50

% r

en

ew

ab

le

volume

0,84 m³

ST

28 kWp

(~40 m²) PV

6 kWp

(~40 m²)

100 %

ren

ew

ab

le

volume

10 m³



*

*

future:solar – energy balances

System type 1: gas boiler + ST + PV / new single family house

reffered to

149 m² heated area

50 % renewable

*virtual end and primary energy (ST & PV = 0)



*

*


System type 1 – gas boiler + ST + PV / new single family house

reffered to

149 m² heated area

100

% r

en

ew

ab

le

*virtual end- and primary energy (ST & PV = 0)



System type 2 – heat pump + PV / new single family house

50 %

ren

ew

ab

le


volume

0,3 m³

PV

6 kWp

(~40 m²)

100 %

ren

ew

ab

le

volume

0,3 m³

PV

3 kWp

(~20 m²)




50 %

ren

ew

ab

le


volume

0,3 m³

PV

3 kWp

(~20 m²)

PV production

2.800 kWh/a

grid supply

4.500 kWh/a ground heat

6.000 kWh/a

elect. HP

2.200 kWh/a

COP 3,7

PV feed-in grid

1.700 kWh/a

PV self use

1.100 kWh/a (~ 37 %/a)

household energy and ventilation

3.400 kWh/a



*

*


reffered to

149 m² heated area


50 % renewable





reffered to

149 m² heated area


100 % renewable

*

*






50 %

ren

ew

ab

le

PVinst: 3 kWp

Total electricity

demand

PV

feed-in grid

PV self use

~ 37 %/a

inverter losses





100

% r

en

ew

ab

le

PVinst: 6 kWp

PV

feed-in grid Total electricity

demand

inverter losses

PV self use

~ 25 %/a





50 %

ren

ew

ab

le

PVinst: 3 kWp

PV feed-in grid

inverter losses

electricity demand

PV self use

~ 37 %/a




required roof area / new single family house

50 % renewable 100 % renewable



future:solar – cost assumptions

investment costs x annuity

energy costs

maintenance costs

annual costs

energy price index = 4%/a

interest rate = 3%/a

lifetime = f(component) 15 …. 50 a

all cost incl. VAT

energy tariff

electricity = 0,244 €/kWh

gas = 0,069 €/kWh

wood pellets = 0,062 €/kWh

district heat = 0,059 €/kWh

PV electricity feed-in tariff = 0,150 €/kWh

CHP electricity feed-in tariff = 0,105 €/kWh



future:solar – cost analysis

Investment cost / energy supply system ( new single family house)

type 1 type 2

type 3

type 4

type 5

type 6

gas boiler

ST 12 m²

PV 3,2 kWp

heat pump

PV 3 kWp

CHP

PV 6 kWp

biomass

ST 12 m²

PV 2 kWp

elect. heater

ST 12 m²

PV 3,1 kWp

distr. heat.

PV 6,5 kWp

50 % renewable




type 1 type 2

type 3

type 4

type 5

type 6

gas boiler

ST 40 m²

PV 6 kWp

heat pump

PV 6 kWp

CHP

PV 16,7 kWp

biomass

ST 12 m²

PV 4,5 kWp

elect. heater

ST 12 m²

PV 9,8 kWp

distr. heat.

PV 13 kWp

100 % renewable

Investment cost / energy supply system ( new single family house)




annual cost (new single family house)

50 %

ren

ew

ab

le

type 1 type 2

type 3

type 4

type 5

type 6

gas boiler

ST 12 m²

PV 3,2 kWp

heat pump

PV 3 kWp

CHP

PV 6 kWp

biomass

ST 12 m²

PV 2 kWp

elect. heater

ST 12 m²

PV 3,1 kWp

distr. heat.

PV 6,5 kWp




10

0 %

re

ne

wa

ble

type 1 type 2

type 3

type 4

type 5

type 6

gas boiler

ST 40 m²

PV 6 kWp

heat pump

PV 6 kWp

CHP

PV 16,7 kWp

biomass

ST 12 m²

PV 4,5 kWp

elect. heater

ST 12 m²

PV 9,8 kWp

distr. heat.

PV 13 kWp

annual cost (new single family house)



future:solar – next steps

next steps

analysis of

and

new and retrofit buildings

final study – March 2014



future:solar – conclusions

Recommendations - Conclusions

Comprehensive approach – total energy consumption and total cost (LCC)!

50 % as well as 100 % RE-supply via use of solar energy – possible!

Roof area sufficient - for SFH as well as MFH (less 4 to 5 floors)

Results for new single family houses:

District heating + PV lowest yearly cost

50 % RE: (Solar Thermal+GB+PV) or (eHP +PV) similar yearly total cost

100 % RE: (eHP+PV) lower yearly cost compare (GB+ST+PV)

Ranking less influenced by feed in tariff (PV)



future:solar

project consortium industry partners



future:solar

Thank you for your attention!

contact:

Prof. Dr.-Ing. M. N. Fisch

Institut für Gebäude- und Solartechnik

TU Braunschweig

Mühlenpfordtstr. 23

38106 Braunschweig

Tel.: +49 (0) 531 391 – 3555

[email protected]


mailto:[email protected]




future:solar feasibility study of solar energy supply systems · pdf filefuture:solar –...

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