Proceedings från EFFSYS 2 dagen 2009
Proceedings från EFFSYS 2 dagen 2009
Proceedings från EFFSYS 2 dagen 2009
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Results<br />
1. A well instrumented miniature supermarket refrigeration system is<br />
established.<br />
2. Total energy consumption is decreased by 8 %.<br />
3. Distribution energy consumption is decreased by 17 %<br />
4. Further improvements are proposed. Eg. Integrated capacity controlled<br />
central pump and compressor.<br />
Energy consumption over 24 hr of different pump modes<br />
(kW/hr)<br />
250<br />
200<br />
150<br />
100<br />
50<br />
0<br />
Speed1 Speed2 Speed3 Speed4 ΔP-v<br />
Control<br />
ΔP-c<br />
Control<br />
Dpumps<br />
Ecomp2(kWh)<br />
Ecomp1(kWh)<br />
E_Cab.(kWh)<br />
E_Dpump.(kWh)<br />
E_Svalve.(kWh)<br />
E_Cpump(kWh)<br />
Different pump modes<br />
Figure 4 Total energy consumption is decreased by 8%. (Based on the optimum pump<br />
speed 4 condition)<br />
Energy consumption over 24 hr of different pump modes<br />
(kW/hr)<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
Speed1 Speed2 Speed3 Speed4 ΔP-v<br />
Control<br />
Different pump modes<br />
ΔP-c<br />
Control<br />
Dpumps<br />
E_Dpump.(kWh)<br />
E_Cpump(kWh)<br />
Figure 5 Distribution energy consumption is decreased by 17 %. (Based on the optimum<br />
pump speed 4 condition)<br />
Contact<br />
Jörgen Rogstam, Sveriges Energi- och Kylcentrum,<br />
jorgen.rogstam@iuc-sek.se
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