Required Cooling Capacity Calculation Cooled substance total volume V Cooling time h Cooling temperature difference �ｪT Circulating fluid . Refer to page 1323 for the typical physical property values by circulating fluid. Cooling capacity = Considering a safety factor of 20%, 2.3 x 1.2 = �ｪT x V x �､ x C h x 60 x 1000 20 x 60 x 1.80 x 103 x 0.96 x 103 15 x 60 x 1000 (In this case, selected Thermo-chiller model will be either HRZ002-L or HRZ004-H.) 0.06 m3 0.25 h 20°C Fluorinated fluid Density �､: 1.80 x 103 kg/m3 Specific heat C: 0.23 kcal/kg・°C (at 20°C) . Refer to page 1323 for the typical physical property values by circulating fluid. : 60 L Example of conventional measurement units (Reference) : 15 min : 20°C (20 K) (40°C . 20°C → 20°C) : Fluorinated fluid Density �､: 1.80 x 103 kg/m3 Specific heat C: 0.96 x 103 J/(kg・K) (at 20°C) Example 3. When there is no heat generation, and when cooling the object below a certain temperature and period of time. Q = = 2304 W = 2.3 kW = 2.8 kW (When the circulating fluid temperature is 20°C.) Q = �ｪT x V x �､ x C h x 860 = 20 x 0.06 x 1.80 x 103 x 0.23 0.25 x 860 = 2.3 kW Cooling capacity = Considering a safety factor of 20%, 2.3 x 1.2 = (In this case, selected Thermo-chiller model will be either HRZ002-L or HRZ004-H.) 2.8 kW (When the circulating fluid temperature is 20°C.) Note) This is the calculated value by changing the fluid temperature only. Thus, it varies substantially depending on the water bath or piping material or shape. Thermo-chiller Water bath V 20°C After 15 min, cool 40°C down to 20°C. 1. Heating capacity When setting the circulating fluid temperature at a higher temperature than the room temperature, the circulating fluid temperature will be heated with the Thermo-chiller. Heating capacity varies depending on the model of the HRZ series. Also, the heating capacity varies depending on the circulating fluid temperature. Consider the heat radiation amount or thermal capacity of the customer’s machine. Check beforehand if the required heating capacity is provided, based on the heating capacity graph for the respective model. 2. Pump capacity Pump capacity varies depending on the model selected from the HRZ series. Also, circulating fluid flow varies depending on the circulating fluid discharge pressure. Consider the installation height difference between our Thermo-chiller and a customer’s machine, and the piping resistance such as circulating fluid pipings, or piping size, or piping curves in the machine. Check beforehand if the required flow is achieved using the pump capacity curves for each respective model. Circulating fluid discharge pressure has the possibility to increase up to the maximum pressure in the pump capacity curves for the respective model. Check beforehand if the circulating fluid pipings or circulating fluid circuit of the customer’s machine are fully durable against this pressure. Precautions on Model Selection Series HRZ 1322