Definition
A super thermostatic oil tank is a device that provides a stable and uniform temperature environment for external laboratory equipment or samples by circulating the thermal oil medium. It typically has a wide temperature control range and can operate in temperatures ranging from above room temperature to hundreds of degrees Celsius, making it suitable for a wide range of physical and chemical experiments that require precise temperature control.
How it works:
The core working principle of the super thermostatic oil tank is based on closed-loop temperature control and fluid circulation. The system contains heaters, coolers, circulation pumps, temperature sensors and controllers. The temperature sensor monitors the temperature of the thermal oil in the oil tank in real time and feeds the signal back to the controller. The controller adjusts the output power of the heater or cooler through the proportional-integral-differential algorithm according to the difference between the set temperature and the measured temperature to achieve precise temperature control. At the same time, the circulation pump promotes the uniform flow of thermal oil in the tank and forms a circulation loop with external equipment through the external interface to ensure the uniformity and stability of the temperature field.
Measurement method
The performance of the super constant temperature tank is mainly evaluated based on the temperature stability and uniformity index. When measuring, refer to relevant national or international standards and arrange multiple calibrated high-precision temperature probes in the tank working area. At a constant set temperature, the temperature readings of each probe over a period of time are recorded. Temperature stability is usually characterized by the amount of temperature change over time at a certain point in the working area, and the calculation formula can be expressed as: ΔTstab = Tmax - Tmin。 The temperature uniformity is characterized by the temperature difference at different spatial points in the working area at the same time, and the calculation formula can be expressed as: ΔTuni = Tmax, spatial - Tmin, spatial。 These measurements should be taken at multiple points over the entire temperature range declared by the device.
Influencing factors
The performance of the super thermostatic oil tank is affected by a variety of factors. The physical properties of thermal oils, such as specific heat capacity, thermal conductivity, and viscosity, directly affect heat transfer efficiency and temperature response speed. Fluctuations in ambient temperature can interfere with the cooling conditions of the system. The flow rate and pressure stability of the circulation pump are related to the heat transfer efficiency of the thermal oil to the outside. The power of the heating and cooling unit and the algorithm accuracy of the controller are the key to determining the temperature control accuracy. In addition, changes in the heat capacity of external loads and the insulation of connecting lines can also affect system stability.
Applications:
Super thermostatic oil sump is widely used in industrial and scientific research scenarios that require high-precision temperature environments. In the field of materials science, it is used for thermal performance testing of polymer materials. In the field of metrology, it provides a stable temperature field for the calibration of various temperature sensors. In the petrochemical industry, it is used for viscosity testing and sample preparation of lubricating oil, asphalt and other products. In the electronics industry, it is used to test the performance of components in high and low temperature environments. It also provides a constant temperature heat source for chemical reactors, rotary evaporators, and other equipment.
Key points of selection
When choosing a super thermostatic oil tank, a number of technical parameters need to be comprehensively considered. The temperature range should cover the minimum and maximum temperature points required for the experiment. The temperature stability and uniformity indexes should meet the accuracy requirements of specific experiments. The flow and pressure of the tank volume and the external circulation interface should match the load of the external equipment. It is necessary to consider whether the equipment has a cooling function to meet the temperature control needs below the ambient temperature. The user-friendliness of the operator, the completeness of safety protection functions and the noise level of the equipment during operation are also important considerations. In addition, the long-term operational reliability, maintenance convenience and energy consumption level of the equipment should also be included in the assessment.