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Why will specific gravity increase while refrigeration?
Specific gravity may increase while refrigeration is occurring because the density of the refrigerant is higher at lower temperatures. As the refrigerant cools down, its molecules become more closely packed together, leading to an increase in specific gravity. This change can affect the performance and efficiency of the refrigeration system.
What is the purpose of the fins on the condenser?
The fins on the condenser increase the surface area available for heat transfer. This helps to efficiently dissipate heat from the refrigerant as it flows through the condenser coils, allowing it to cool down and change state from a gas to a liquid.
Does an overcharge of refrigerant affect suction pressure?
In a simple system with a fixed orfice expansion device for example, an overcharge will increase suction and head pressure. Compressor amps will also increase. Overall refrigeration capacity will be reduced. lc
What is mean by critical pressure of refrigerant?
The critical pressure of a refrigerant is the pressure at which the liquid and vapor phases of the refrigerant become indistinguishable at the critical point. Beyond this pressure, any increase in pressure will not result in liquefaction of the vapor. The critical pressure is an important parameter used in refrigeration systems to determine conditions for efficient operation.
What kind of head pressure would you see if the condenser fan became inoperative?
If the condenser fan becomes inoperative, the head pressure in the system would likely increase. This is due to an inefficient heat transfer process, causing the refrigerant to remain at a higher temperature, leading to higher pressure in the condenser. Additionally, the compressor may also overheat and trip the safety controls.
Why will specific gravity increase while refrigeration?
Specific gravity may increase while refrigeration is occurring because the density of the refrigerant is higher at lower temperatures. As the refrigerant cools down, its molecules become more closely packed together, leading to an increase in specific gravity. This change can affect the performance and efficiency of the refrigeration system.
What is the purpose for subcooling the liquid refrigerant before it leaves the condenser?
Subcooling the liquid refrigerant before it leaves the condenser helps to increase the refrigeration system's efficiency by ensuring that the refrigerant is in a completely liquid state. This can improve the system's cooling capacity and reduce the risk of compressor damage due to the presence of any vapor in the system.
What is Condenser pressure in absorption chiller?
Condenser pressure in an absorption chiller refers to the pressure within the condenser unit where the refrigerant vapor is condensed into a liquid. It is influenced by the temperature of the cooling medium (usually water or air) used to remove heat from the refrigerant. Maintaining appropriate condenser pressure is crucial for the efficient operation of the chiller, as it affects the overall performance and capacity of the cooling system. High condenser pressure can reduce efficiency and increase energy consumption, while low pressure can lead to inadequate refrigerant flow.
What is the purpose of the fins on the condenser?
The fins on the condenser increase the surface area available for heat transfer. This helps to efficiently dissipate heat from the refrigerant as it flows through the condenser coils, allowing it to cool down and change state from a gas to a liquid.
What kind of head pressure would you experience if the condenser fan motor became inoperative?
If the condenser fan motor became inoperative, the head pressure in the refrigeration system would increase significantly. This is because the condenser fan motor is responsible for dissipating heat from the refrigerant, and without it, the heat cannot be effectively removed. As a result, the refrigerant would not be able to condense properly, leading to higher pressure in the system. This increase in head pressure can cause damage to the compressor and other components in the system if not addressed promptly.
Does an overcharge of refrigerant affect suction pressure?
In a simple system with a fixed orfice expansion device for example, an overcharge will increase suction and head pressure. Compressor amps will also increase. Overall refrigeration capacity will be reduced. lc
What is mean by critical pressure of refrigerant?
The critical pressure of a refrigerant is the pressure at which the liquid and vapor phases of the refrigerant become indistinguishable at the critical point. Beyond this pressure, any increase in pressure will not result in liquefaction of the vapor. The critical pressure is an important parameter used in refrigeration systems to determine conditions for efficient operation.
What kind of head pressure would you see if the condenser fan became inoperative?
If the condenser fan becomes inoperative, the head pressure in the system would likely increase. This is due to an inefficient heat transfer process, causing the refrigerant to remain at a higher temperature, leading to higher pressure in the condenser. Additionally, the compressor may also overheat and trip the safety controls.
Where is the purpose of motor in a fridge?
The purpose of the motor in a refrigerator is to drive the compressor, which plays a crucial role in the refrigeration cycle. The compressor circulates refrigerant through the system, compressing it to increase its pressure and temperature before it moves through the condenser and evaporator coils. This process removes heat from the interior of the fridge, keeping food and beverages cold. In essence, the motor enables the efficient operation of the fridge by maintaining the desired low temperature.
Why the vacuum is maintained in condenser?
For increasing steam turbine efficiency. if vacuum is not maintained then, uncondensable gases and air in condenser will increase the condenser pressure.
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.
Why does the compressor keep running when the condenser fan shuts off?
The compressor continues to run after the condenser fan shuts off because it needs to maintain the pressure and temperature of the refrigerant in the system. If the compressor stops running, it can lead to an increase in pressure that could potentially damage the system.
