The invention relates to the technical field of heat exchange testing, and concretely relates to an in-
pipe two-phase
flow boiling heat exchange testing
system and a control method thereof. The test
system sequentially comprises a working medium pump, a
mass flow meter, a preheater, an experiment section, a second expansion valve, a condenser, a first
liquid storage device and a subcooler, the first
liquid storage device, the subcooler and the condenser are all connected with a low-temperature cold source, and the test
system is characterized in that the first expansion valve is further arranged between the working medium pump and the
mass flow meter, the test system further comprises a second
liquid storage device, one end of the second liquid storage device is communicated with a pipeline between the working medium pump and the first expansion valve through a first
ball valve, and the other end of the second liquid storage device is communicated with the first liquid storage device through a second
ball valve. According to the scheme, the influence of the working medium flow fluctuation on the experimental parameter
measurement precision can be effectively reduced, and the experimental test range can be expanded and the control precision of the working condition environment can be improved on the premise of the existing equipment component capability.