Oil temperature issue in the heat transfer oil expansion tank
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The manufacturer requires that the temperature of the heat transfer oil in the expansion tank be around 60°C; how can this temperature be maintained at around 60°C? Do we need to add a heat exchanger? ?
Could you be more specific? What is the role of the heat transfer oil? Is the expansion tank installed indoors or outdoors? What is the operating temperature of the oil? Will simple insulation be sufficient to meet the requirements?
No heat exchanger is needed; under normal conditions, the oil temperature in the surge tank remains around 40 degrees and does not rise any higher. The function of the surge tank is to remove any low-boiling-point components or moisture that are generated during the heating process, preventing them from coming into contact with air. This function is particularly useful during the process of heating new oil. Once everything is operating normally, little to no substance needs to be removed, so the temperature can be maintained at 60 degrees without the need for a cooling device.
The expansion tank serves two purposes: 1. The heat transfer oil in the system expands when heated, and since the volume of the system in which this oil is used is fixed, the expansion tank acts as a place to store the excess heat transfer oil resulting from this expansion”； 2. Location for the separation and removal of low-boiling substances such as water. The majority of the heat transfer oil in the expansion tank is stationary, and its temperature does not exceed 60°C during normal operation.
In a typical hot oil system, the hot oil users are connected by pipes to an expansion tank, and the bottom of this expansion tank is connected by pipes to the inlet of the hot oil circulation pump. During operation, it is only necessary to adjust the valve on the pipeline leading to the hot oil users to ensure that hot oil flows into the expansion tank, and to adjust the valve on the pipeline at the inlet of the pump at the bottom in order to maintain the liquid level in the expansion tank. Once the temperature of the hot oil system is stable, adjusting these two valves will allow the desired temperature to be maintained. Of course, if the temperature of the hot oil system is below 60°C, then a heater must be used at the expansion tank, or a pipe can be run directly from the hot oil heater (if available) to the expansion tank.