Take lead on your project with an efficient system concept - Danfoss ...
Take lead on your project with an efficient system concept - Danfoss ...
Take lead on your project with an efficient system concept - Danfoss ...
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Central versus decentralized<br />
domestic hot water producti<strong>on</strong><br />
The renovati<strong>on</strong> study compares the<br />
lifecycle costs of <strong>an</strong> existing hot water<br />
producti<strong>on</strong> <strong>with</strong> electrical water heaters<br />
in every apartment <strong>with</strong> a central hot<br />
water producti<strong>on</strong> <strong>an</strong>d a decentralized<br />
hot water producti<strong>on</strong>.<br />
Both the central <strong>an</strong>d the decentralized<br />
domestic hot water producti<strong>on</strong> dem<strong>on</strong>strate<br />
such major benefits <strong>with</strong> the<br />
New building cost effectiveness <strong>an</strong>alysis<br />
lower c<strong>on</strong>sumpti<strong>on</strong> <strong>an</strong>d operating costs<br />
al<strong>on</strong>e, that their investment is already<br />
paid back <strong>with</strong>in approx. 3 years.<br />
The future price increases for fossil fuels<br />
were not yet c<strong>on</strong>sidered here either.<br />
50 apartments – new building Vari<strong>an</strong>t 1<br />
1.<br />
1.1<br />
1.2<br />
2.<br />
2.1<br />
2.2<br />
3.<br />
3.1<br />
Investment <strong>an</strong>d capital costs<br />
Investment costs<br />
Capital-dependent costs<br />
Relati<strong>on</strong> to Vari<strong>an</strong>t 1<br />
C<strong>on</strong>sumpti<strong>on</strong> related costs<br />
Heat loss<br />
Energy costs Circulati<strong>on</strong> pumps<br />
Total<br />
Relati<strong>on</strong> to Vari<strong>an</strong>t 1<br />
Operati<strong>on</strong> related costs<br />
Mainten<strong>an</strong>ce<br />
Total<br />
Relati<strong>on</strong> to Vari<strong>an</strong>t 1<br />
4. Annual costs<br />
Relati<strong>on</strong> to Vari<strong>an</strong>t 1<br />
€<br />
€ / a<br />
%<br />
€<br />
€ / a<br />
€ / a<br />
€ / a<br />
%<br />
€<br />
€ / a<br />
€ / a<br />
%<br />
€ / a<br />
%<br />
7<br />
Electrical DHW<br />
boiler in apartment<br />
Central heating<br />
67.334,00<br />
4.865,83<br />
100,00<br />
3.012,81<br />
253,99<br />
3.266,80<br />
100,00<br />
1.080,00<br />
1.080,00<br />
100,00<br />
9.212,62<br />
100,00<br />
Introducti<strong>on</strong><br />
Vari<strong>an</strong>t 2<br />
Central DHW<br />
Central heating<br />
85.505,00<br />
7.062,68<br />
145,18<br />
2.168,03<br />
177,18<br />
2.345,21<br />
71,79<br />
1.170,00<br />
1.170,00<br />
108,33<br />
10.577,89<br />
114,82<br />
Vari<strong>an</strong>t 3<br />
Decentralized DHW<br />
Central heating<br />
+ buffer storage<br />
72.291,00<br />
6.277,80<br />
129,02<br />
745,42<br />
164,03<br />
909,45<br />
27,84<br />
1.170,00<br />
1.170,00<br />
108,33<br />
8.357,25<br />
90,72<br />
(Source: Kulle & Hofstetter, Stadtwerke München, 2011)
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