RSL - the refrigerant specalists

RS-45 (R434A) The answer to replacing R22 in larger systems for OEMs

R134a, R407c & R410a have been presented as the main replacements for R22 in air conditioning applications. These referigerants have different physical properties comparied to R22:

R134a: has a considerably lower capacity than R22 (-33%) which means bigger & more expensive equipment is required.

R407C: has a wide glide of over 5°C which can cause operating problems including icing up & fractionation.

R410A: operating pressures more than 50% higher than R22 which requires a complete re-design of equipment & restricts its use to smaller systems. R410A can only be used in larger systems by adding more compressors which substantially increases system cost.

RS-45(R434A) has been formulated to avoid these problems and, in particular, to replace R22 in larger systems with a competitive total cost of equipment while matching the main thermodynamic properties of R22. RS-45 is unique in being able to mirror R22 at both high & low temperatures.

Table 1 - Comparative properties: Air Conditioning
+7°C evap +45°C cond		R22	R134a	RS-45 R434A	R410A	R407C
Discharge pressure	Bar	17.91	12.05	19.81	28.19	19.3
Discharge temperature	°C	111	89	81	104	97
Capacity Capacity % R22	kJ/m³	3062	2049 67	3115 102	4467 146	3189 104
COP	System	2.49	2.57	2.44	2.36	2.48
Compression ratio		3.02	3.39	3.02	2.98	3.20
Glide	°C	0	0	1.5	0.1	5

Table 2 - Comparative properties: Refrigeration
-35°C evap +35°C cond		R22	R134a	RS-45 R434A	R410A	R407C
Discharge pressure	Bar	14.07	9.25	15.55	22.15	15.02
Discharge temperature	°C	197	140	120	180	160
Capacity Capacity % R22	kJ/m³	619	345 56	632 102	946 153	597 96
COP	System	1.13	1.19	1.13	1.08	1.14
Compression ratio		11.4	15.1	11.4	10.8	13
Glide	°C	0	0	1.5	0.1	5

Particularly suited to larger systems where R410A is not a practical option, R407C has a high glide, & R134a requires much larger equipment.
A single replacement for R22 mirroring its performance across the application range of air conditioning & refrigeration.
Near azeotropic with glide 70% lower than R407C
Avoids costly re-tooling to high pressure R410A
Same compressors for RS-45 as R22. No need to "bank" compressors like R410A to increase system capacity. As a result RS-45 is a considerably lower cost option.
Same compression ration as R22
Similar Coefficient of Performance to R22 & 3% higher than R410A
Similar pressures to R22 & considerably lower pressures than R410A
Compatible with traditional as well as synthetic lubricants

Lubricants

RS-45 is suitable for use with mineral, alkylbenzene & polyol ester lubricants. R134a, R407C & R410A should not be used with MO & AB oils.

Compressors

R22 compressors can be used with RS-45. The higher pressures of R410A restrict its use to smaller systems owing to the lack of availability of compressors. Larger systems using R410A require adding extra compressors at significant cost.

Glide

RS-45 has a glide of 1.5°C which compares to R407C with a glide exceeding 5°C. Consquently, RS-45 has a wider application range & avoids the problems of icing up, fractionation & reduced performance. R407C should not be used & tube evaporators where RS-45 is a suitable option to replace R22.

Coefficient of Performance

RS-45 has a COP which is 3% higher than R410A & similar to R22. Efficiencies can be optimized by installing a heat exchanger in the suction line which is often readily accomodated in bigger systems.

Capacity