Obtain the temperature difference between inlet and outlet by circulating the fluid inside the customer’s machine. Heat generation amount Q Circulating fluid temperature difference ΔT (= T2 . T1) Circulating fluid outlet temperature T1 Circulating fluid return temperature T2 Circulating fluid flow rate L Circulating fluid : Unknown : 0.8°C (0.8 K) : 25°C (298.15 K) : 25.8°C (298.95 K) : 3 L/min : Water Density γ: 1 x 103 kg/m3 Specific heat C: 4.2 x 103 J/(kg・K) Q = ΔT x L x γ x C 60 x 1000 0.8 x 3 x 1 x 103 x 4.2 x 103 60 x 1000 = 167 W = 200 W Thermo-con Customer’s machine T2: Return temperature T1: Outlet temperature L ΔT = T2 . T1 L H HEC Example 2 When the heat generation amount in the customer’s machine is not known. Cooling capacity = Considering a safety factor of 20%, 167 W x 1.2 = The flow rate of the circulating fluid depends on the pressure loss of the customer’s machine and the length, diameter and resistance created by bends in the circulating fluid piping, etc. Check if the required flow rate of circulating fluid can be obtained before selecting. Precautions on Model Selection Cooled substance total volume V Cooling time h Cooling temperature difference ΔT Circulating fluid . Refer to the information shown below for the typical physical property values by circulating fluid. Cooling capacity = Considering a safety factor of 20%, 933 W x 1.2 = 1120 W Q = ΔT x V x γ x C h x 60 x 1000 = 10 x 20 x 1 x 103 x 4.2 x 103 15 x 60 x 1000 = 933 W Guide to Model Selection : 20 L : 15 min : Temperature difference: 10°C (10 K). Cool from 30°C (303 K) to 20°C (293 K). : Clear water Density γ: 1 x 103 kg/m3 Specific heat C: 4.2 x 103 J/(kg・K) Water bath V After 15 min, cool 30°C down to 20°C. 20°C HEC H L Circulating Fluid Typical Physical Property Values Fluorinated Fluids Physical property Temperature value .10°C 20°C 50°C 80°C Density γ [kg/m3] Specific heat C [J/(kg . K)] 0.87 x 103 0.96 x 103 1.05 x 103 1.14 x 103 1.87 x 103 1.80 x 103 1.74 x 103 1.67 x 103 Water Density γ: 1 x 103 [kg/m3] Specific heat C: 4.2 x 103 [J/(kg . K)] Example 3 When cooling the object below a certain temperature in certain period of time. Model Selection Series HEC 1385 HRG HRS HRZ HRZD HRW HEC HEB HED HEA IDH