HIdRos WDH 039, Technical Manual

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WDH
Ground source heat pumps
MTWDHGB REV.072008
30
COMPRESSORS CAPACITY STEP CONTROLS
COMPRESSORS NUMBER
Model 1 2 3 4
039 50% 50% --- ---
045 50% 50% --- ---
050 50% 50% --- ---
060 44% 56% --- ---
070 50% 50% --- ---
080 50% 50% --- ---
090 43% 57% --- ---
110 50% 50% --- ---
120 45% 55% --- ---
130 50% 50% --- ---
152 44% 56% --- ---
162 50% 50% --- ---
144 21,5% 21,5% 28,5% 28,5%
164 25% 25% 25% 25%
190 21,5% 21,5% 28,5% 28,5%
210 25% 25% 25% 25%
240 22,5% 22,5% 27,5% 27,5%
260 25% 25% 25% 25%
300 22% 22% 28% 28%
320 25% 25% 25% 25%
CORRECTION TABLES Source side heat exchanger temperature difference °C
Fouling factor 3 5 8 10
HCCCP 1,02 1 0,98 0,97
IPCF 1,01 1 0,99 0,98
CORRECTION TABLES User side heat exchanger temperature difference °C
Fouling factor 3 5 8 10
HCCCP 0,99 1 1,01 1,015
IPCF 1,01 1 0,99 0,99
HCCF = Heating capacity correction factor. IPCF = Input power correction factor.
The correction factors have to be applied to the nominal data reported in the previous tables that shows the capacitieswith Dt5°C.
CORRECTION TABLES Operation with glycol
Glicol percentage Freezing point (°C) CCF IPCF WFCF PDCF
10 -3,2 0,985 1 1,02 1,08
20 -7,8 0,98 0,99 1,05 1,12
30 -14,1 0,97 0,98 1,09 1,22
40 -22,3
0,965 0,97 1,14 1,25
50 -33,8 0,955 0,965 1,2 1,33
CCF: Capacity correction factor IPCF: Input power correction factor
WFCF: Water flow correction factor PDCF: Pressure drops correction factor.
The water flow rate and pressure drop correction factors are to be applied directly to the values given for operation without glycol.
The water flow rate correction factor is calculated in order to maintain the same temperature difference as that which would be
obtained without glycol. The pressure drop correction factor takes into account the different flow rate obtained from the application of
the flow rate correction factor.
CORRECTION TABLES Different Fouling factors
Fouling factor 0,00005 0,0001 0,0002
CCCP 1 0,98 0,94
IPCF 1 0,98 0,95
CCF = Cooling capacity correction factor. IPCF = Input power correction factor.