Ferroli RHA series, Installation Manual

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GENERAL SPECIFICATIONS - BRINE UNIT BR - BP
Brine Unit (BR)
Correction factors to apply to the basic version data
percentage of glycol in mass / volume 20 / 18.1
freezing point [°C] -8
Produced water temperature 4 2 0 -2 -4 -6 -8 -10 -12
Cooling capacity CCPF 0.912 0.855 0.798 0.738 0.683 - - - -
Power input CCPA 0.967 0.957 0.947 0.927 0.897 - - - -
water flow rate CCQA 1.071 1.072 1.073 1.075 1.076 - - - -
water pressure drop CCDP 1.090 1.095 1.100 1.110 1.120 - - - -
percentage of glycol in mass / volume 30 / 27.7
freezing point [°C] -14
Produced water temperature 4 2 0 -2 -4 -6 -8 -10 -12
Cooling capacity CCPF 0.899 0.842 0.785 0.725 0.670 0.613 0.562 - -
Power input CCPA 0.960 0.950 0.940 0.920 0.890 0.870 0.840 - -
water flow rate CCQA 1.106 1.107 1.108 1.109 1.110 1.111 1.112 - -
water pressure drop CCDP 1.140 1.145 1.150 1.155 1.160 1.175 1.190 - -
percentage of glycol in mass / volume 40 / 37.5
freezing point [°C] -22
Produced water temperature 4 2 0 -2 -4 -6 -8 -10 -12
Cooling capacity CCPF 0.884 0.827 0.770 0.710 0.655 0.598 0.547 0.490 0.437
Power input CCPA 0.880 0.870 0.860 0.840 0.810 0.790 0.760 0.724 0.686
water flow rate CCQA 1.150 1.151 1.153 1.154 1.155 1.157 1.158 1.159 1.161
water pressure drop CCDP 1.190 1.195 1.200 1.210 1.220 1.235 1.250 1.269 1.290
percentage of glycol in mass / volume 20 / 19.4
freezing point [°C] -7
Produced water temperature 4 2 0 -2 -4 -6 -8 -10 -12
Cooling capacity CCPF 0.874 0.807 0.740 0.690 0.641 - - - -
Power input CCPA 0.945 0.935 0.925 0.900 0.875 - - - -
water flow rate CCQA 1.037 1.038 1.039 1.039 1.040 - - - -
water pressure drop CCDP 1.110 1.115 1.120 1.130 1.140 - - - -
percentage of glycol in mass / volume 30 / 29.4
freezing point [°C] -13
Produced water temperature 4 2 0 -2 -4 -6 -8 -10 -12
Cooling capacity CCPF 0.869 0.799 0.729 0.680 0.630 0.583 0.536 - -
Power input CCPA 0.935 0.923 0.910 0.888 0.865 0.838 0.810 - -
water flow rate CCQA 1.072 1.071 1.070 1.069 1.069 1.068 1.067 - -
water pressure drop CCDP 1.160 1.175 1.190 1.200 1.210 1.255 1.300 - -
percentage of glycol in mass / volume 40 / 39.6
freezing point [°C] -21
Produced water temperature 4 2 0 -2 -4 -6 -8 -10 -12
Cooling capacity CCPF 0.848 0.784 0.719 0.670 0.620 0.570 0.520 0.478 0.438
Power input CCPA 0.865 0.855 0.845 0.820 0.795 0.773 0.750 0.714 0.680
water flow rate CCQA 1.116 1.114 1.112 1.110 1.108 1.107 1.105 1.103 1.101
water pressure drop CCDP 1.230 1.275 1.320 1.375 1.430 1.500 1.570 1.642 1.724
ETHYLENE GLYCOL
PROPYLENE GLYCOL
Based on leaving water temperature of the evaporator and condensing temperature = 7°C from the table “performances” extract
Cooling Capacity (kWf) and Compressors Power Input (kWa).
Based on type and percentage of glycol extract CCPF, CCPA, CCQA, CCDP.
Then calculate.
Pf_brine = kWf x CCPF
Pass_CP_brine = kWa x CCPA
Then calculate brine flow rate:
Q_brine_evap [l/s]=CCQA x (Pf_brine [kW]*0.86/ ∆ T_brine)/3.6
where ∆ T_brine is the difference between inlet-outlet evaporator water temperature:
∆
T_brine=Twin_evap_brine-Twout_evap_brine
With this brine flow rate enter in abscissa on the water pressure drop of the evaporator then you have Dp_app.
Finally you can calculate the actual pressure drop of the brine on evaporator side:
Dp_evap_brine =CCDP x Dp_app