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Which refrigerant has the highest boiling temperatures at atmospheric pressure?
The refrigerant plays a key role in achieving vapor cycle air ... After that, and until all the water has been evaporated, the remaining boiling liquid stays at the ... of the higher temperature of boiling resulting from increased pressure.
What is the approximate Boiling pressure of refrigerant oil in the system?
The boiling pressure of refrigerant oil in a system generally depends on the specific type of oil and its temperature. Typically, refrigerant oils have a boiling point ranging from about 150°C to 300°C (302°F to 572°F) under standard atmospheric pressure. The precise boiling pressure can vary significantly based on the oil's composition and the refrigeration system's operating conditions. It's essential to consult the manufacturer's specifications for accurate values.
What is the normal pressures for a 404a walk in cooler?
The normal pressures for a R-404A walk-in cooler typically range from 5 to 10 psi for the low side (suction) pressure and 200 to 250 psi for the high side (discharge) pressure, depending on the specific operating conditions and ambient temperature. It's important to note that these values can vary based on the system design, load conditions, and refrigerant temperature. Regular monitoring and maintenance are essential to ensure optimal performance and efficiency.
How can pressure be used to control the temperature of a refrigerated space?
Pressure can be used to control the temperature of a refrigerated space through the principles of thermodynamics, specifically in refrigeration cycles. By increasing the pressure of a refrigerant gas, its boiling point rises, allowing it to absorb more heat from the refrigerated space when it evaporates. Conversely, lowering the pressure results in a lower boiling point, enabling the refrigerant to evaporate at a lower temperature and enhance cooling. This manipulation of pressure and temperature is fundamental in maintaining the desired conditions in refrigeration systems.
Does refrigerant enter the compressor as a low temperature low pressure gas?
Yes. The basic components of the refrigeration system are the refrigerant, compressor, condenser and receiver, expansion device and the evaporator. One cycle: Refrigerant travels to Compressor (A) to Condenser (B) to Expansion device (C) to evaporator (D). The refrigerant gas at low pressure and temperature is drawn into the compressor. The gas is compressed to a higher pressure, which causes an increase in the temperature. The refrigerant gas at a high pressure and temperature passes to the condenser (point B), where it is cooled (the refrigerant gives up its latent heat) and then condenses to a liquid. The high pressure, low temperature liquid is collected in the receiver. The high pressure liquid is routed through an expansion valve (point C), where it undergoes an abrupt reduction in pressure. That pressure reduction causes part of the liquid to immediately vaporize or flash. The vapor and remaining liquid are cooled to the saturation temperature (boiling point) of the liquid at the reduced pressure. At this point most of the refrigerant is a liquid. The boiling point of the liquid is low, due to the low pressure. When the liquid refrigerant enters the evaporator (point D), it absorbs heat from the process and boils. The refrigerant gas is now at low pressure and temperature, and enters the suction side of the compressor, completing the cycle.
Is r-404a compatible with 134a?
R-404A and R-134a are not compatible for use in the same system. R-404A is a blend of refrigerants, primarily used in low-temperature applications, while R-134a is a single-component refrigerant commonly used in medium-temperature applications. Mixing them can lead to reduced efficiency, system damage, and operational issues. Always consult manufacturer guidelines and refrigerant compatibility charts before making any changes to refrigerant types.
What is the property of refrigerant 404A?
what is suction pressure of r407a
Can R22 be used with 404A refrigerant?
No, refrigerants cannot be blended.
What determines the temperature at which a refrigerant vaporizes?
The pressure and the specific refrigerant properties determine the temperature at which a refrigerant vaporizes. As pressure increases, the boiling point of the refrigerant also increases. Different refrigerants have different boiling points at different pressures.
Define a zeotropic refrigerant blend and give an example?
In a zeotropic blend, the blends boil out at different temperature but at the same pressure. typical example is R704
What should the sub cooling be on a txv 404a refrigerant freezer?
42
Could you mix 404a refrigerant with R12?
Mixing 404A refrigerant with R12 is not recommended, as they are incompatible and can lead to system damage, decreased efficiency, and safety hazards. R12 is a CFC refrigerant, while 404A is a blend of HFCs that operates at different pressures and thermodynamic properties. Additionally, mixing refrigerants can complicate recovery and recycling processes, making it difficult to maintain compliance with environmental regulations. It's best to use the specified refrigerant for your system.
What is the low side pressure of a freezer using R-404A refrigerant?
if room tem is 70f 15psi
What is the low side pressure of a freezer using R 404A refrigerant?
if room tem is 70f 15psi
Which refrigerant has the highest boiling temperatures at atmospheric pressure?
The refrigerant plays a key role in achieving vapor cycle air ... After that, and until all the water has been evaporated, the remaining boiling liquid stays at the ... of the higher temperature of boiling resulting from increased pressure.
Define a near-azeotropic refrigerant blend and give two examples.?
a blended refrigerant with less than 10F temperature glide, 41oA and 404A are examples.
Will 404a mix or use the same system as r12?
R-404A is not compatible with R-12 systems due to differences in chemical composition and operating pressures. While R-404A is a hydrofluorocarbon (HFC) refrigerant, R-12 is a chlorofluorocarbon (CFC), and their properties require distinct system components. Converting an R-12 system to use R-404A typically involves replacing the compressor, expansion valve, and other components to ensure proper functionality and efficiency. Always consult a qualified technician for refrigerant conversions.
