Chiller Capacity & Flow

Capacity, flow or temperature difference of a water or glycol circuit, in SI and IP units, with COP, EER and kW/TR. Fluid properties from CoolProp, optional Excel mode with a fixed c value

Sample values, replace with your own measurements

Capacity factor of the fluid

Hover over the chart to read a value

Selected fluid Other concentrations Water Specific heat c_p Density ρ Water Operating point Freezing point

Calculation Solve for Fluid in °C Fluid out °C Flow l/s Capacity kW Electrical power kW, optional Sensor accuracy K per sensor

Units & Excel mode Temperature Flow Capacity Excel mode: fixed c value, 1 l = 1 kg c value kJ/(kg·K), water 4.184

Fluid Fluid Concentration % by mass Lowest temperature °C, frost check, optional Properties at the mean temperature of fluid in and out.

Unit converter Quantity Value Unit

Result

Efficiency

Fluid

Unit converter

Assessment

Method: Q = V·ρ·c_p·ΔT with density and specific heat at the mean fluid temperature from CoolProp 8.0 (water IAPWS-95, ethylene and propylene glycol as mass fraction after Melinder). The capacity factor compares ρ·c_p with water at 20 °C (4176 kJ/(m³·K)); it shows how much capacity the same flow carries. Excel mode reproduces the common hand formula Q = ΔT·V·c with 1 l = 1 kg; with c = 4.184 kJ/(kg·K) it equals the IP rule TR = ΔT_°F·GPM·500 / 12 000 within 0.1 %. Conversions: 1 TR = 3.516853 kW = 12 000 BTU/h, 1 kW = 3412.14 BTU/h = 859.85 kcal/h, 1 l/s = 15.850323 GPM (US) = 3.6 m³/h, ΔT 1 K = 1.8 °F. COP = Q / P_el, EER = 3.412·COP in BTU/Wh, kW/TR = 3.516853 / COP. Measurement uncertainty from two independent temperature sensors: ±√2·accuracy / ΔT.

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