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Energy evaluation of R152a as drop in replacement for R134a in cascade refrigeration plants

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Figure

Figure 2. View of the cascade refrigeration plant .
Figure 3. Schematic diagram of the experimental plant.
Table 5b. Summary of the operating conditions maintained during tests performed with the cascade  refrigeration plant using R134a/CO 2
Figure 4a. Validation of heat transfer rates in the cascade plant using R134a/R744.
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