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Thermodynamic performances of [mmim]DMP/Methanol absorption refrigeration

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Abstract

In order to study the theoretical cycle characteristic of [mmim]DMP (1-methyl-3-methylimidazolium dimethylphosphate) /methanol absorption refrigeration, the modified UNIFAC group contribution model and the Wilson model are established through correlating the experimental vapor pressure data of [mmim]DMP/methanol at T=280∼370 K and methanol mole fraction x= 0.529∼0.965. Thermodynamic performances of absorption refrigeration utilizing [mmim]DMP/methanol, LiBr/H2O and H2O/NH3 are investigated and compared with each other under the same operating conditions. From the results, some conclusions are obtained as follows: 1) the circulation ratio of the [mmim]DMP /methanol absorption refrigeration is higher than that of the LiBr/H2O absorption refrigeration, but still can be acceptable and tolerable. 2) The COP of the [mmim]DMP/methanol absorption refrigeration is smaller than that of the LiBr/H2O absorption refrigeration, while it is higher than that of the H2O/NH3 absorption refrigeration under most operating conditions. 3) The [mmim]DMP/methanol absorption refrigeration are still available with high COP when the heat source temperature is too high to drive LiBr/H2O absorption refrigeration.

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Authors and Affiliations

  1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China

    Wei Chen, Shiqiang Liang, Yongxian Guo, Keyong Cheng, Xiaohong Gui & Dawei Tang

  2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China

    Wei Chen & Keyong Cheng

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  1. Wei Chen
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  2. Shiqiang Liang
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  3. Yongxian Guo
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  5. Xiaohong Gui
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  6. Dawei Tang
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Chen, W., Liang, S., Guo, Y. et al. Thermodynamic performances of [mmim]DMP/Methanol absorption refrigeration. J. Therm. Sci. 21, 557–563 (2012). https://doi.org/10.1007/s11630-012-0581-y

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  • DOI: https://doi.org/10.1007/s11630-012-0581-y

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