| versie
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 |
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| NB: enthalpy of stale air kept at the same
value (thanks to aftercooler heatpump) |
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Temp |
RH % |
x
abs g/kg |
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| Outside |
10 |
80 |
6,104 |
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effic. Eplant |
0,4 |
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| Inside |
31 |
51 |
14,3 |
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effic. therm |
0,9 |
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| supplytemperature |
31 |
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100%
outside air systems |
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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 |
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| supply
x abs g/kg |
5,4 |
5,4 |
6,1 |
6,1 |
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9 |
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8,5 |
5,4 |
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| delta-x g/kg |
8,9 |
8,9 |
8,2 |
8,2 |
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5,3 |
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5,8 |
8,9 |
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| airflow required kg/hr |
19712 |
19712 |
21352 |
21352 |
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33019 |
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30369 |
19683 |
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| air flow required m3/h |
17386 |
17386 |
18832 |
18832 |
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29123 |
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26786 |
17360 |
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| cooler for dehumidification kWk |
11,1 |
21,0 |
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166,0 |
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277,3 |
269,5 |
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| heater
kWth (to same supplytemperature) |
11,9 |
51,2 |
31,0 |
126,8 |
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44,5 |
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152,0 |
144,5 |
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| stale air cooler kWc (to 25,43kJ/kg) |
126,2 |
156,1 |
157,6 |
252,3 |
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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 |
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| cooler for dehumidification E kWe |
2,8 |
5,2 |
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41,5 |
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69,3 |
67,4 |
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| stale air cooler E kWe |
31,6 |
39,0 |
39,4 |
63,1 |
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| condensorheat from dehumidification.
kWth |
13,9 |
26,2 |
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207,4 |
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346,6 |
336,8 |
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| condensorheat from stale air cooler kWth |
157,8 |
195,1 |
197,0 |
315,4 |
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| Netto for dehumidification |
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| Electra
kW |
2,8 |
5,2 |
0,0 |
0,0 |
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41,5 |
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69,3 |
67,4 |
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| heatsurplus kWth |
2,0 |
-25,0 |
-31,0 |
-126,8 |
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163,0 |
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194,6 |
192,3 |
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| "COP heatpump" |
0,7 |
-4,8 |
#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 |
34,3 |
44,3 |
39,4 |
63,1 |
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41,5 |
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69,3 |
67,4 |
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| heatsurplus kWth |
159,8 |
170,1 |
166,0 |
188,6 |
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163,0 |
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194,6 |
192,3 |
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| "COP heatpump" |
4,65 |
3,84 |
4,21 |
2,99 |
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3,93 |
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2,81 |
2,85 |
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| (cop max= cop cooling +1) |
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| Heatfactor (useful surplus heat/used primary
source) |
1,86 |
1,54 |
1,69 |
1,20 |
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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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| NB
low COP factors at dehumidification only
for the ventilating systems: small dehumidification required so small
heat production though there is an afterheater required: |
| result is a small amount of useful heat |
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