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Transient lumped parameter modeling for vapour compression cycle based refrigerator.

Number: pap. n. R29, 2449

Author(s) : TULAPURKAR C., KHANDELWAL R.

Summary

Owing to the various regulatory norms, reduction in refrigerator energy consumption has been subjected to a lot of research. When modifying any design to achieve this objective, experiments are usually performed for performance prediction/ assessment, which are expensive and time consuming. Hence to minimize the number of experiments, it is essential to establish a method to predict the performance numerically. Refrigerator, during start-up goes through an initial pull down cycle i.e. temperature of the refrigerator compartments decreases to a required operational point. After that, the refrigerator goes through continuous compressor on-off cycles due to heat leakage through walls and gaskets. It has always been a challenge to model refrigerator operations numerically due to its transient nature. In the present work, a methodology to predict this transient behavior of a domestic refrigerator has been developed and discussed. The methodology embraces the development of transient model based on lumped parameter method, which predicts evaporator temperature, interaction of sealed system with in-compartment air and compartment temperature. This model is robust and computationally very economical, bringing down the design cycle time significantly. This model is intended for qualitative predictions and provides a strong foundation towards developing it further for more accurate quantitative predictions.

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Pages: 8 p.

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Details

  • Original title: Transient lumped parameter modeling for vapour compression cycle based refrigerator.
  • Record ID : 30001006
  • Languages: English
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/07/12

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