How to determine the flow of molten salt pump?

How to determine the flow of molten salt pump? 
The flow of molten salt pump is related to the heat exchange, the greater the heat exchange, the greater the flow of molten salt pump. In addition, the flow of molten salt pump is determined according to the heat transfer coefficient of heat exchange equipment, the process requirements of the chemical system. More than just a qualitative introduction, for different process systems, molten salt pump flow is determined to be different, in view of the complexity of heat transfer, but also according to the experience of correction.