Fixed capacity Fixed Diameter Parameter Units R-12 R-134a R-1234ze(E) R-1234ze(E) kg s-1 14.31 11.33 12.34 8.84 mass flow kg m-3 20.54 16.86 13.74 13.74 density m3 0.70 0.67 0.90 0.64 Volume flow s-1 rpm 11983 14691 11919 Impellor m 0.255 0.235 0.278 0.235 Impellor dia m s-1 160 181 174 174 tip speed - 2.34 2.54 2.57 2.57 Pressure ratio - 8.01 7.90 7.91 7.91 CoP - 101.3% 100.0% 100.1% 100.1% Relative CoP - 100.0% 100.0% 100.0% 73.4% Relative capacity
Parameter Units R-12 Fixed capacity Fixed Diameter R-134a R-1234ze(E) R-1234ze(E) mass flow kg s-1 14.31 11.33 12.34 8.84 density kg m-3 20.54 16.86 13.74 13.74 Volume flow m3 s-1 0.70 0.67 0.90 0.64 Impellor rpm 11983 14691 11919 Impellor dia m 0.255 0.235 0.278 0.235 tip speed m s-1 160 181 174 174 Pressure ratio - 2.34 2.54 2.57 2.57 CoP - 8.01 7.90 7.91 7.91 Relative CoP - 101.3% 100.0% 100.1% 100.1% Relative capacity - 100.0% 100.0% 100.0% 73.4%
R-1234ze%20for%20Variable%20Speed%20Centrifugal%20Chillers.docx