Comparison of independent and synchronous opening control strategies of two air-dampers in three-temperature frost-free refrigerator

• Date:2025-04-30
• Title of Paper:Comparison of independent and synchronous opening control strategies of two air-dampers in three-temperature frost-free refrigerator
• Journal:Applied Thermal Engineering
• Summary:The three-temperature frost-free refrigerator has a variable-temperature (5
  C to 18
  C) compartment
  (VC) besides regular refrigerating compartment (RC) and freezing compartment (FC). The air cooled by
  the evaporator always flows into FC during compressor-on period, but into RC and VC through their
  respective air-damper controlled by their temperature sensors. The effect of RC and VC air-damper control
  strategy on the refrigerator performance was studied experimentally in this paper. Experimental
  results show that the FC average temperature could not decrease during air-damper opening period.
  The main reason was that the evaporator supply-air temperature increased due to higher RC and VC
  return-air temperature, and up to higher than the FC average temperature. Then, the compressor-on time
  ratio during on/off cycle was increased. Meanwhile, the compressor input power would be also increased
  with higher evaporating temperature. The independent and synchronous opening control strategies for
  RC and VC air damper were compared experimentally. The synchronous opening control shortened the
  overall time of air-damper opening by 16.7% compared with the independent control since the RC and
  VC opening time overlapped with each other. Finally, the refrigerator energy consumption decreased
  by 3.1% while average temperatures of RC, VC and FC stayed almost unchanged, attributed to the decrease
  in the compressor-on time ratio and the average compressor input power of the refrigerator.
• Co-author:张振亚，黄东，石丽华，迟丽华
• Volume:2018 (128)
• Page Number:127-133
• Translation or Not:No
• Date of Publication:2017-12-05