Analysis of thermal performance of electromagnetic induction based molten salt heating system

doi:10.12028/j.issn.2095-4239.2018.0236

Abstract

Abstract: This paper concerns the application of the electromagnetic induction heating technology in heating molten salt in a heat storage system. An experimental system was set up for electromagnetic induction heating of molten salt and temperature variation of molten salt and coil cooling water under different molten salt velocity and coil current conditions were investigated. The results showed that the electromagnetic induction heater can heat the molten salt quickly. The temperature rise of molten salt occurred mainly in the first 80-240 s after starting the heating process, and the temperature rising rate reached maximum at~100s. A change in the coil current or molten salt velocity can produce molten salts with different final temperatures. When the velocity was 0.177m/s, the outlet temperature of molten salt at different currents was 201.45℃, 203.89℃, 207.60℃, 212.98℃ and 221.45℃. When the velocity of molten salt was constant, the heat absorption of molten salt and coil cooling water increased with increasing coil current. When the coil current was constant, the heat absorption of molten salt increased with increasing velocity, while the heat absorption of cooling water decreased. When the velocity of molten salt was 0.296 m/s and the current of coil was 600 A, the heating efficiency of molten salt was 69.28% and the corresponding heat loss of the cooling water was 16.45%.

Key words: molten salt heat storage and heating, electromagnetic induction heating, coil current, velocity, thermal efficiency

CLC Number:

TM121

ZHANG Yongle, ZHANG Xiaoming, WU Yuting, LU Yuanwei, MA Chongfang. Analysis of thermal performance of electromagnetic induction based molten salt heating system[J]. Energy Storage Science and Technology, 2019, 8(2): 319-325.

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