DIMS Engineering Suite Hydraulic Injection Circuit
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Flow Unit:

Chilled Water Hydraulic Injection Circuit

Primary Supply: 7.0 °C (Fixed) PICV in Primary Return Pump in Secondary Supply
Presets:
Required Primary Flow (qp)
0.21 L/s
0.75 m³/h (25.0%)
Return Temp (Tret)
19.0 °C
Primary ΔT = 12.0 K
Bypass Flow (qbyp)
0.62 L/s
2.25 m³/h (75.0%)
Mixed Supply (Ts,sup)
16.0 °C
Sec: 0.83 L/s
Cooling Load (Q̇)
10.42 kW
Secondary ΔT = 3.0 K
PICV Ratio (α)
25.0%
75.0% Recirculated
Operating Parameters Interactive
Primary Supply (CHWS)
Active primary network ΔP
7.0 °C
Secondary Flow (qs) 0.83 L/s
3.00 m³/h · 49.8 L/min
Secondary Supply Temp (Ts,sup) 16.0 °C
Mixed after bypass ≥15°C Dew-Point Safe
Return Temperature (Tret) 19.0 °C
Sec ΔT = 3.0 K Primary ΔT = 12.0 K
Cooling Load (Q̇) 10.42 kW
Thermal duty 2.96 RT
Primary Circuit Output CHWS = 7.0 °C
Primary Flow (qp)
0.208 L/s
0.75 m³/h · 12.5 L/min
Return Temp (Tret)
19.0 °C
Primary ΔT = 12.0 K
Hydraulic Injection Schematic Node A: Split · Node B: Mix
SECONDARY CIRCUIT PRIMARY CIRCUIT (ACTIVE NETWORK ΔP) SECONDARY COOLING LOAD COOLING DUTY 10.42 kW (ΔT 3.0 K) CHWS Main (7.0 °C) CHWR Main CHECK VALVE BYPASS (A → B) 0.62 L/s (75.0%) B A Pump TE BV FE PICV 25.0% 0–10V Control SECONDARY SUPPLY Mixed Temp Ts,sup: 16.0 °C Sec. Flow qs: 0.83 L/s (3.00 m³/h) PRIMARY SUPPLY (FIXED 7°C) Req. Flow qp: 0.21 L/s (0.75 m³/h) Supply Temp: 7.0 °C SECONDARY RETURN Return Temp Tret: 19.0 °C Return Flow qs: 0.83 L/s (3.00 m³/h) PRIMARY RETURN (PICV) Return Temp Tret: 19.0 °C (ΔT 12.0 K) Return Flow qp: 0.21 L/s (0.75 m³/h)
Mixing Balance (Node B): 0.21 L/s @ 7.0°C + 0.62 L/s @ 19.0°C = 0.83 L/s @ 16.0°C
Primary 7.0°C: 25.0%
Bypass 19.0°C: 75.0%
Primary vs. Bypass Flow Curve q_p = 0.21 L/s @ 16.0°C
Branch Schedule Pipe Sizing
Branch Flow Temp Pipe Velocity