R744 Refrigerant (Co ) - Carel E2V Manual De Instrucciones

3.9 ELECTRONIC EXPANSION VALVE SELECTION - R744 refrigerant (CO
ΔPC (bar) - Pressure head according to the temperature
Tcond – Saturated condensing temperature (°C)
-15
-40 12.8
-35 10.9
-30 8.6
-25 6.1
Table 1: determine the design pressure head ΔP from the saturated evaporating temperature Tevap and condensing temperature Tcond for the chosen refrigerant.
RATING (kW) – Equivalent cooling capacity of the CAREL valves
Tevap. -30°C
12
E2V09B 4.9
E2V11B 8.8
E2V14B 13.4
E2V18B 19.1
E2V24B 38
E2V35B 76.6
E4V55A --
E4V65A --
E4V85A --
E4V95A --
Tevap. -40°C
16
E2V09B 5.7
E2V11B 10.1
E2V14B 15.5
E2V18B 22
E2V24B 43.9
E2V35B 88.4
E4V55A --
E4V65A --
E4V85A --
E4V95A --
Table 3: the data are calculated with subcooling set at 5 °C.
-10 -5 0 5
16.4 20.4 24.8 29.6
14.4 18.4 22.8 27.6
12.2 16.2 20.6 25.4
9.7 13.6 18 22.8
ΔPv [bar]
16 20 24
5.4 5.7 5.9
9.6 10.1 10.5
14.7 15.5 16.1
20.9 22.1 22.9
41.6 44 45.6
83.7 88.6 91.9
-- -- --
-- -- --
-- -- --
-- -- --
ΔPv [bar]
20 24 29
6 6.3 6.4
10.7 11.1 11.4
16.4 17 17.5
23.3 24.2 24.8
46.5 48.2 49.4
93.6 97.1 99.6
-- -- --
-- -- --
-- -- --
-- -- --
)
2
14
R744
(C0 )
2
+030220815 rel. 1.0 del 08.05.07