| version
25-4-2001 |
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| Comparison
of heatpumps in AHU´s Hemmes, Menerga, Dantherm e.a. |
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Wanted dehumidification |
175 |
kg/hr |
| NB: enthalpy of stale air kept at the same
value (thanks to aftercooler heatpump) |
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Temp |
RH % |
x
abs g/kg |
|
| Outside |
0 |
90 |
3,4052 |
|
effic. Eplant |
0,4 |
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| Inside |
31 |
51 |
14,3 |
|
effic. therm |
0,9 |
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| supplytemperature |
31 |
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100%
outside air systems |
|
recirculating systems |
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Hemmes |
Hemmes |
Menerga |
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Menerga |
Gea Happ |
Dantherm |
Dantherm |
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BH90 |
BH60 |
Men60 |
Hpu stale |
Vent60 |
Mecirc. |
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90%+90% |
60%+60% |
2x60% |
0%wtw |
60%wtw |
2x60% |
circa60% |
0% 13,4degC |
0% 5 degC |
| supply
x abs g/kg |
3,4 |
3,4 |
3,4 |
3,4 |
3,4 |
9 |
|
8,5 |
5,4 |
| delta-x g/kg |
10,9 |
10,9 |
10,9 |
10,9 |
10,9 |
5,3 |
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5,8 |
8,9 |
| airflow required kg/hr |
16063 |
16063 |
16063 |
16063 |
16063 |
33019 |
|
30369 |
19683 |
| air flow required m3/h |
14167 |
14167 |
14167 |
14167 |
14167 |
29123 |
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26786 |
17360 |
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| cooler for dehumidification kWk |
0,0 |
0,0 |
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|
166,0 |
|
277,3 |
269,5 |
| heater
kWth (to same supplytemperature) |
14,0 |
56,1 |
32,6 |
140,1 |
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44,5 |
|
152,0 |
144,5 |
| stale air cooler kWc (to 25,43kJ/kg) |
63,7 |
105,7 |
82,9 |
189,8 |
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| COP chiller sec |
4,0 |
4,0 |
4,0 |
4,0 |
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4,0 |
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4,0 |
4,0 |
| cooler for dehumidification E kWe |
0,0 |
0,0 |
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41,5 |
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69,3 |
67,4 |
| stale air cooler E kWe |
15,9 |
26,4 |
20,7 |
47,5 |
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| condensorheat from dehumidification.
kWth |
0,0 |
0,0 |
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207,4 |
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346,6 |
336,8 |
| condensorheat from stale air cooler kWth |
79,7 |
132,2 |
103,6 |
237,3 |
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| Netto for dehumidification |
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| Electra
kW |
0,0 |
0,0 |
0,0 |
0,0 |
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41,5 |
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69,3 |
67,4 |
| heatsurplus kWth |
-14,0 |
-56,1 |
-32,6 |
-140,1 |
|
163,0 |
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194,6 |
192,3 |
| "COP heatpump" |
#DIV/0! |
#DIV/0! |
#DIV/0! |
#DIV/0! |
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3,9 |
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2,8 |
2,9 |
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| Netto
for dehumidification plus stale air cooler |
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| Electra
kW |
15,9 |
26,4 |
20,7 |
47,5 |
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41,5 |
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69,3 |
67,4 |
| heatsurplus kWth |
65,7 |
76,1 |
71,0 |
97,2 |
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163,0 |
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194,6 |
192,3 |
| "COP heatpump" |
4,12 |
2,88 |
3,43 |
2,05 |
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3,93 |
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2,81 |
2,85 |
| (cop max= cop cooling +1) |
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| Heatfactor (useful surplus heat/used primary
source) |
1,65 |
1,15 |
1,37 |
0,82 |
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1,57 |
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1,12 |
1,14 |
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| evaporation of the pool is heat loss |
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| evaporation
of the pool kWth |
110 |
110 |
110 |
110 |
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110 |
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110 |
110 |
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| still to
consider : the exact fanenergy and the real COP considering the temperatures
of the cooling path. |
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