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TECHNICAL DATA - BASE VERSION (VB)
Correction factor for the use of glycol in heating mode
ETHYLENE GLYCOL with water produced between 30 ÷ 55 º C.
PROPYLENE GLYCOL with water produced between 30 ÷ 55ºC.
Percentage Of glycol in mass / volume 0 / 0 10 / 8,9 20 / 18,1 30 / 27,7 40 / 37,5
Freezing point [°C] 0 -3,2 -8 -14 -22
CCPT - Heating capacity 1,000 0,995 0,985 0,975 0,970
CCPA - Power input 1,000 1,010 1,015 1,020 1,030
CCQA - Water flow rate 1,000 1,038 1,062 1,091 1,127
CCDP - Water pressure drop 1,000 1,026 1,051 1,077 1,103
Percentage Of glycol in mass / volume 0 / 0 10 / 9,6 20 / 19,4 30 / 29,4 40 / 39,6
Freezing point [°C] 0 -3,3 -7 -13 -21
CCPT - Heating capacity 1,000 0,990 0,975 0,965 0,955
CCPA - Power input 1,000 1,010 1,020 1,030 1,040
CCQA - Water flow rate 1,000 1,018 1,032 1,053 1,082
CCDP - Water pressure drop 1,000 1,026 1,051 1,077 1,103
Based on DESIGN CONDITIONS from the table “performances” extract Heating Capacity (kWt
r
).
Based on type and percentage of glycol extract CCPT, CCQA, CCDP.
Then calculate.
Pt_brine=kWt
r
xCCPT
Pass_CP_brine=kWaxCCPA
Then calculate brine ow rate to the heat recovery exchanger:
Q_brine[l/s]=CCQAx(Pt_brine[kW]*0.86/∆T_brine)/3.6
where ∆T_brine is the temperature difference outlet-intlet heat recovery exchanger:
∆T_brine=Twout_brine-Twin_brine
With this brine ow rate enter in abscissa on the water pressure drop of the heat recovery then you have Dp_app.
Finally you can calculate the actual pressure drop of the brine on heat recovery:
Dp_brine=CCDPxDp_app
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