1. Calculate the Heat Value Based on the Temperature Difference Between the Cooling Water (oil) Inlet and Outlet Temperatures.

Q=SH × De × F × DT / 60

Q:Heat output / KW

SH:The specific heat capacity of hot water is 4.2 kJ/kg*°C (4.2 kJ per kilogram per degree Celsius);

the specific heat capacity of oil is 1.97 kJ/kg*°C (1.97 kJ per kilogram per degree Celsius).

DE:The specific gravity of water is 1 kg/L; the specific gravity of oil is 0.88 kg/L.

F:Flow rate LPM (L/min)

DT:Cooling water (oil) inlet–outlet temperature difference (outlet temperature – inlet temperature) Note:“/60” is used to convert flow rate from liters per minute to liters per second; 1 kW= 1 kJ/s;

Example 1: Cooling water inlet temperature: 15 °C; cooling water outlet temperature: 20 °C; flow rate: 20 L/min

Heat output Q = 4.2 × 1 × 20 × (20 – 15) / 60 = 7 kW

When selecting the cooling capacity for a cooler, you may increase it by 20%–50%.

Example 2: Cooling oil inlet temperature: 18 °C; cooling oil outlet temperature: 26 °C; flow rate: 15 L/ min

Heat output Q = 1.97 × 0.88 × 15 × (26 – 18) / 60 = 2.6 kW

When selecting the cooling capacity for a chiller unit, you may increase it by 20%–50%.

1. Estimation Based on Equipment Power and Heat Generation
2. A.For spindle cooling applications, the required cooling capacity of the refrigeration unit can be estimated as 30% of the spindle motor’s power rating.

Example: 15 kW motor; optional refrigeration units with a cooling capacity of 4.5 kW or 5.8 kW are available;

1. The injection molding machine can be calculated based on a cooling capacity of 0.6 kW per US gallon or a refrigeration capacity of 3 kW per80 tons;

III. Calculate the Heat Output Based on the Temperature Rise of the Water (or Oil) Tank.

Q=SH × De × V × DT / 60

Q:Heat output KW

SH:The specific heat capacity of hot water is 4.2 kJ/kg ·°C (4.2 kilojoules per kilogram per degree Celsius);

the specific heat capacity of oil is 1.97 kJ/kg ·°C (1.97 kilojoules per kilogram per degree Celsius).

DE:The specific gravity of water is 1 kg/L ; the specific gravity of oil is 0.88 kg/L.

V:Water capacity L (liters) refers to the total water capacity within the water tank and piping system. DT:Maximum temperature rise of water (oil) within one minute

Note:”/60″ is used to convert a temperature rise from degrees Celsius per minute to degrees Celsius per second; 1 kW= 1 kJ/s;

Note: During measurement, the temperature of the water (oil) tank should be slightly lower than the ambient temperature; additionally, the equipment should be operating under its maximum load.

Example: Water tank capacity – 3000 L; Maximum water flow rate – 0.6  °C/min

Heat output Q = 4.2 × 1 × 3000 × 0.6 / 60 = 126 kW

When selecting the cooling capacity for a chiller, you may increase it by 20%–50%;

Supplementary Specification:

1. 1.The cooling capacity of the chiller varies depending on the ambient temperature and the outlet water temperature;
2. 2.The actual heat generation of the equipment may also vary depending on factors such as the work pieces, molds, and parameters;
3. 3.After the chiller is activated, the temperature drops; as a result, the temperatures of the connecting pipelines, water tank, oil tank, molds, main spindle, and equipment surfaces will be lower than the ambient temperature, leading to heat absorption and an increased load;
4. 4.In practical industrial cooling applications, it is often not feasible to accurately apply the aforementioned methods for calculation;  in  such  cases,  estimation  must  be  made  using  empirical  data  or  by  drawing  analogies  with  similar equipment.
5. 5.Any calculation method may introduce deviations, leading to the selection of a refrigeration unit that is either too large or too small; therefore, the above method should be used only as a reference.

Remarks:

◆This product series includes three models for selection: the model without pump or fuel tank, the model with pump but without fuel tank, and the model with both pump and fuel tank.

◆During installation, maintain a clearance of 80 cm at the air intake and a clearance of 200 cm at the hot air exhaust outlet.

◆The above cooling capacity was measured under conditions of an oil temperature of 35 °C and an ambient temperature of 35 °C; the cooling capacity decreases as the ambient temperature rises and the oil temperature falls.

◆YLD25/35/45 – Only three-phase, five-wire system.

◆Our products are continuously being improved; the specific structural dimensions may differ from the parameters listed above.

Remarks:

◆This product series includes three models for selection: the model without pump or fuel tank, the model with pump but without fuel tank, and the model with both pump and fuel tank.

◆During installation, a space of 80 cm must be reserved at the air intake, and a space of 200 cm must be reserved at the hot air exhaust outlet.

◆The above cooling capacity was measured under conditions of an oil temperature of 35 °C and an ambient temperature of 35 °C; the cooling capacity decreases slightly as the ambient temperature rises and the oil temperature falls.

◆Our products are continuously being improved; the specific structural dimensions may differ from the parameters listed above.

Remarks:

◆This product series includes three models for selection: the model without pump or fuel tank, the model with pump but without fuel tank, and the model with both pump and fuel tank.

◆During installation, a minimum space of 80 cm should be reserved at the air intake, and a minimum space of 200 cm should be reserved at the hot air exhaust outlet.

◆The above cooling capacity was measured under conditions of an oil temperature of 35 °C and an ambient temperature of 35 °C; the cooling capacity decreases as the ambient temperature increases and the oil temperature decreases.

◆Our products are continuously being improved; the specific structural dimensions may differ from the parameters listed above

• Specifications and Technical Parameters
  Model			YLD400	YLD500	YLD600	YLD800	YLD1000	YLD1200
  Refrigerating capacity		[Kcal/h]	40000	50000	60000	80000	100000	120000
  Temperature control range			Adjustable range: 25–45°C
  Service condition	Environmental Requirements	[℃]	Temperature: 5–43°C; Good ventilation; No dust or corrosive aerosols; No exposure to sunlight or rain; No thermal radiation; No vibration
  	Oil temperature	[℃]	15~50
  General supply			3PH/AC380V±10%/50Hz
  Input power without pump		[Kw]	15	19	23	30	43	49
  Input power with pump		[Kw]	19	25	28	38	54	60
  Rated current with pump		[A]	36	48	55	75	105	115
  Oil pump power		[Kw]	4	5.5	5.5	7.5	11	11
  Oil pump flow rate		[L/min]	160	200	263	315	400	526
  Flow ratewithout oil pump		[L/min]	-10%～+50%
  Piping specifications		[internal thread]	DN65	DN80	DN80	DN100	DN125	DN125
  Outer dimension	Widith	[mm]	800	900	1000	1000	1100	1100
  	Thickness	[mm]	1500	1700	1900	2000	2200	2800
  	Height	[mm]	1800	1900	2000	2050	2250	2150
  Weight		[Kg]	600	700	800	1000	1200	1600
  Refrigerant		R22/R407C/R410a or others
  Security guard		Refrigerant high-and low-pressure protection; overload/short-circuit/timeout protection; power supply phase loss/phase reversal/overvoltage/undervoltage protection

  YLD400 – 1200 Dimensional Drawing
  Model	A	B	C	D	E	F	G	H	I	J
  YLD400	1750	800	1500	760	1100	250	200	280	DN65	DN65
  YLD500	1900	900	1700	860	1300	250	200	350	DN80	DN80
  YLD600	1900	1000	1900	960	1500	250	200	350	DN80	DN80
  YLD800	2050	1000	2000	960	1600	250	200	350	DN100	DN100
  YLD1000	2250	1100	2200	1060	1700	250	230	380	DN125	DN125
  YLD1200	2150	1100	2800	1060	2300	250	230	380	DN125	DN125

  Remarks:

  ◆During installation, a space of approximately 80 cm should be reserved around the perimeter; at the hot air exhaust outlet, a space of approximately 200 cm should be reserved.

  ◆The above cooling capacity was measured under conditions of an oil temperature of 35°C and an ambient temperature of 35 °C; the cooling capacity decreases as the ambient temperature rises and the oil temperature falls.

  ◆Our products are continuously being improved; the specific structural dimensions may differ from the parameters listed above.

Remarks:

◆During installation, a space of approximately 100 cm should be reserved around the perimeter; at the hot air exhaust outlet, a space of approximately 300 cm should be reserved.

◆The above cooling capacity was measured under conditions of an oil temperature of 35°C and an ambient temperature of 35 °C; the cooling capacity decreases as the ambient temperature rises and the oil temperature falls.

◆Our products are continuously being improved; the specific structural dimensions may differ from the parameters listed above.

Application range:

• Primarily used for temperature control in aqueous or oily solutions containing various impurities, such as cutting fluids.
• Temperature control for various corrosive liquids.
• For applications where the fuel tank and water tank need to be integrated into a single unit.

Note:

1. When selecting, designing, or operating adrop-inoil-cooling unit, special attention must be paid to the compatibility between the oil tank dimensions, the liquid level height, and the unit itself; it must be ensured that the bottom coil of the oil-cooling unit is always fully submerged within the coolant tank and not exposed.
2. When the oil cooler is in operation, it is essential to ensure that a sufficient liquid flow passes through the bottom evaporator coil. If this flow rate cannot be guaranteed, you may consider ourdrop-in oil cooler equipped with a stirring pump.
3. The material of the bottom coil can be selected according to specific requirements – available in copper, stainless steel, or titanium tubes(unless otherwise specified, stainless steel tubes are typically used).

Remarks:

◆YLJ is suitable for cooling aqueous or oily fluids containing impurities, such as cutting fluids. The dimensions of the bottom cooling coil and the lower frame are adjusted according to the type of fluid being cooled (aqueous or oily).

However, variations may occur due to differences in the type of liquid or in the accompanying fuel tanks and liquid level heights; the dimensions E, F, G and H shall be determined through negotiation.

◆Our products are continuously being improved; therefore, the specific parameters and dimensions may differ from those listed in the table.

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