The BTU capacity of a 1/8 HP compressor depends on the refrigerant used by the system and the evaporator temperature of the refrigeration system.
1/8 HP to BTU:
For example, for a 1/8 HP compressor using R134a refrigerant, the cooling capacity varies with the evaporator temperature as shown in the table below:
| Evaporator Temp (°C) | -35°C | -30°C | -25°C | -20°C | -15°C | -10°C |
|---|---|---|---|---|---|---|
| Cooling Capacity (BTU/h) | 105.51 | 242.34 | 383.58 | 534.51 | 700.44 | 886.65 |
For instance, a 1/8 HP compressor operating at an evaporator temperature of -20°C with R134a refrigerant achieves a cooling capacity of approximately 534.51 BTU/h.
Factors Affecting Cooling Capacity:
However, the cooling capacity can vary further depending on factors such as:
- Compressor Technology and Efficiency
- Frequency (Hertz) or Speed of the Compressor Motor
- Ambient Temperature
- Condenser Cooling Type (natural or forced convection)
- Subcooling Achieved in the Condenser
- Superheating of the Refrigerant Gas in the Evaporator
Operating Conditions for the Table:
The table values are based on the following conditions:
- Superheating: 5°C at the evaporator outlet
- Subcooling: 5°C at the condenser outlet
- Ambient Temperature: 35°C
If any of these conditions change, the cooling capacity of the 1/8 HP compressor will also differ.
