-
E-mail
1650740367@qq.com
-
Phone
16602839833
-
Address
No. 118 Muyu Street, Gate 15, Luoshi Machinery
Luoshi Machinery (Chengdu) Co., Ltd
Analysis of the principle of slowing down the heating rate of thermal oil heaters
Date: 2025-11-29Read: 20
The decrease in heating rate of the thermal oil heater is essentially due to energy loss or efficiency degradation in the "heat generation transfer utilization" process. Combined with the working principle of the equipment, the core reasons can be divided into four categories. Chengdu Luoshi MachineryFor users of thermal oil electric heaters, we provide synchronized servicesRemote guidance+maintenanceExclusive service that can quickly help you locate problems and restore device performance:
1、 Deterioration of thermal oil performance (core cause)
As a heat transfer medium, the state of thermal oil directly determines the heat transfer efficiency. After long-term use, the oil is prone to oxidation and cracking reactions at high temperatures, generating impurities such as carbon deposits and gum, resulting in a decrease in thermal conductivity - at the same temperature, the ability of deteriorated oil to transfer heat is only 60% -80% of that of new oil. At the same time, impurities will adhere to the surface of the heating tube to form a thermal insulation layer, increasing thermal resistance and making it difficult for the heat generated by the heating element to be conducted into the oil; If the viscosity of the oil increases, it will also reduce fluidity, further suppressing the effect of thermal convection.
2、 Heating system malfunction (direct impact)
Heating elements are the core of heat generation, and their performance degradation will directly lead to slower heating. Scaling, surface oxidation, or aging of internal resistance wires in electric heating tubes can result in a decrease in actual heating power, making it impossible to achieve the designed heating load; If the burner nozzle of a gas/oil heater is blocked or the air intake is insufficient, it will cause incomplete combustion and significantly reduce the heat conversion efficiency. In addition, the malfunction of the temperature control system may lead to temperature setting deviation, causing the heater to enter a constant temperature state in advance, which may appear to slow down heating but is actually a control logic abnormality.
3、 Poor circulation system (transmission obstruction)
Heat needs to be transported to the heat exchange equipment through the circulation of heat transfer oil, and a malfunction in the circulation system can cause interruption of heat transfer. Wear of the impeller of the circulating pump and insufficient motor power can cause a decrease in oil flow rate, slow down the speed of heat convection, and prevent timely diffusion of heat; Scaling on the inner wall of the pipeline, valve blockage, or system leakage can cause an increase in circulation resistance, and even local oil stagnation, resulting in a disconnection of heat transfer between the heating end and the heat exchange end, manifested as an extended heating cycle.
4、 Heat exchange and environmental factors (indirect losses)
The heat exchanger is the terminal of heat utilization, and the scaling and carbon deposition on its inner wall will increase the heat transfer resistance, hinder the transfer of heat from the oil to the heated medium, and indirectly cause the heating end to slow down. At the same time, the ambient temperature can also affect the heating efficiency - in low temperature environments in winter, the temperature difference between the equipment body, pipelines, and the environment increases, and the heat loss rate increases. The heat generated by the heating element needs to be prioritized to compensate for the lost heat, resulting in a decrease in effective heating efficiency; If the insulation layer of the pipeline is damaged, the heat loss will further intensify, forming an energy loss cycle of "heating heat dissipation".
In summary, the slowing down of heating is the result of the collaborative effect of multiple systems. It is necessary to investigate from multiple dimensions such as the medium state, core components, circulation links, and environmental insulation in order to accurately locate the problem and restore the original heating efficiency of the equipment.