In given operating conditions, the heating capacity as
same as the power consumption for the three refrigerants
performed the same changed tendency with
a liner relationship. However, it was noted that there
were some differences of COP with the ambient temperatures.
When the ambient temperature was under
13 C, the increasing order of COP among three refrigerants
was R744 > R134a > R22. If it was over 13 C,
the order was changed to R134a > R744 > R22. Based on
the simulated data, the solar energy input ratios of R22,
R134a and R744 were changed in the range of 30%e44%,
48%e89% and 39%e73% respectively at all corresponding
outdoor temperature. In view of the purpose of
using solar energy properly, it may be necessary to
choose the right area of collecting panel
appropriate structure for CO2 system pointedly.
In given operating conditions, the heating capacity assame as the power consumption for the three refrigerantsperformed the same changed tendency witha liner relationship. However, it was noted that therewere some differences of COP with the ambient temperatures.When the ambient temperature was under13 C, the increasing order of COP among three refrigerantswas R744 > R134a > R22. If it was over 13 C,the order was changed to R134a > R744 > R22. Based onthe simulated data, the solar energy input ratios of R22,R134a and R744 were changed in the range of 30%e44%,48%e89% and 39%e73% respectively at all correspondingoutdoor temperature. In view of the purpose ofusing solar energy properly, it may be necessary tochoose the right area of collecting panelappropriate structure for CO2 system pointedly.
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