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Why must liquid refrigerant be present for the pressure - temperature relationship to apply?
The pressure-temperature relationship for refrigerants is based on the principles of thermodynamics, specifically the behavior of substances in different phases. Liquid refrigerant must be present because the relationship holds true only when the refrigerant is in a saturated state, where it can coexist as both liquid and vapor. This balance allows for the defined pressure at which a refrigerant will boil or condense, ensuring accurate readings and predictable performance in refrigeration systems. Without liquid refrigerant, the system may not operate efficiently or could lead to erroneous pressure measurements.
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What determines the pressure of confined gas?
The pressure of a confined gas is determined by its temperature, volume, and the number of gas molecules present. The pressure increases with higher temperature or if the volume is decreased, while the pressure decreases with lower temperature or if the volume is increased. This relationship is described by the ideal gas law.
What is the component of a refrigeration system which changes a high pressure vapor to a high pressure liquid?
A brief discussion of the operating vapor-compression cycle is helpful to indicate other potential refrigeration problems in real systems. In the basic cycle, slightly subcooled refrigerant leaves the condenser at high pressure and flows into the liquid receiver if one is present. The refrigerant then enters the throttling device (capillary tube, TXV, etc.) where the pressure is dropped. It then enters the evaporator as a two-phase mixture (liquid and vapor) and evaporates or boils at low temperature, adsorbing heat. Slightly superheated refrigerant vapor exits the evaporator and enters the suction line accumulator, if one is present (used to trap any transient liquid slugs). The refrigerant vapor then enters the compressor where the pressure and temperature are increased as the compressor compresses the refrigerant vapor. The vapor leaving the compressor is superheated, and the compressor discharge is the hottest point in the cycle. This refrigerant is cooled and condensed in the condenser where heat is rejected, and the refrigerant is condensed to liquid. Refrigerant actually leaves the condenser slightly subcooled (subcooled liquid) to assure condensation has been complete. Any non-condensable vapors in the system will be unable to condense in the condenser and will appear as gas bubbles in the condensed liquid stream. These non-condensables may collect in the condenser and displace refrigerant from the condenser heat exchanger, thereby reducing the effective surface area of the condenser.The compressor changes the low pressure vapor to high pressure vapor sending it threw the condenser to cool and turn it back into liquid.
How can the volume of gas be increased if the pressure is constant?
I wonder that by increasing temperature it will lead to a higher pressure.
What phase is water in at 75 C and 9atm?
Water is in the liquid phase at 75°C and 9 atm pressure. At this temperature and pressure, water exists as a liquid due to the combination of temperature and pressure conditions present.
Is high pressure the same as high temperature?
High pressure and high temperature are related concepts but not the same. High pressure refers to the force exerted on a system, while high temperature refers to the amount of thermal energy present in a system. They can influence each other, for example, increasing pressure can sometimes lead to an increase in temperature.
What determines the pressure of confined gas?
The pressure of a confined gas is determined by its temperature, volume, and the number of gas molecules present. The pressure increases with higher temperature or if the volume is decreased, while the pressure decreases with lower temperature or if the volume is increased. This relationship is described by the ideal gas law.
How can R-12 refrigerant be identified in a recovery cylinder?
R-12 refrigerant can be identified in a recovery cylinder by its unique chemical properties and color. R-12 refrigerant is a chlorofluorocarbon (CFC) with a pale yellow color. It can also be confirmed using a refrigerant identifier tool that can detect the specific type of refrigerant present in the cylinder.
What relationship does Avogadro's law described?
the relationship between volume and moles-APEX
What is the component of a refrigeration system which changes a high pressure vapor to a high pressure liquid?
A brief discussion of the operating vapor-compression cycle is helpful to indicate other potential refrigeration problems in real systems. In the basic cycle, slightly subcooled refrigerant leaves the condenser at high pressure and flows into the liquid receiver if one is present. The refrigerant then enters the throttling device (capillary tube, TXV, etc.) where the pressure is dropped. It then enters the evaporator as a two-phase mixture (liquid and vapor) and evaporates or boils at low temperature, adsorbing heat. Slightly superheated refrigerant vapor exits the evaporator and enters the suction line accumulator, if one is present (used to trap any transient liquid slugs). The refrigerant vapor then enters the compressor where the pressure and temperature are increased as the compressor compresses the refrigerant vapor. The vapor leaving the compressor is superheated, and the compressor discharge is the hottest point in the cycle. This refrigerant is cooled and condensed in the condenser where heat is rejected, and the refrigerant is condensed to liquid. Refrigerant actually leaves the condenser slightly subcooled (subcooled liquid) to assure condensation has been complete. Any non-condensable vapors in the system will be unable to condense in the condenser and will appear as gas bubbles in the condensed liquid stream. These non-condensables may collect in the condenser and displace refrigerant from the condenser heat exchanger, thereby reducing the effective surface area of the condenser.The compressor changes the low pressure vapor to high pressure vapor sending it threw the condenser to cool and turn it back into liquid.
How does the volume of an ideal gas at constant temperature and pressure change as the number of molecules increases?
The volume of an ideal gas will increase as the number of molecules increases at constant temperature and pressure. This relationship is described by Avogadro's law, which states that the volume of a gas is directly proportional to the number of molecules present, assuming constant temperature and pressure.
What determines the volume of gas?
Pressure and temperature. As pressure increases, volume decreases; as temperature increases, volume increases with it. At standard temperature and pressure (1 atm, 273 degrees Kelvin), one mole of a gas (6.022 x 1023 particles) has the volume of 22.4 liters.
What is the difference between the present value of an investment and its cost?
pressure is dependent on temperature pressure is a mere important factor that affect chemical reaction temperature acts on chemical reaction faster than pressure
What forces do you find in the present of the formation of metamorphic rock?
temperature, pressure or added fluids
What is pressure in LPG bottles?
The pressure in a propane bottle depends on the temperature. Propane boils at -42 oC at atmospheric pressure. Above this temperature the pressure in the bottle would be 0 psi. then it rises in a curve with the temperature. At Zero oC the pressure would be about 55 psi., at 10 oC it would be 78 psi. and at 43.3 oC it is 204 psi. Butane has a lower pressure/temperature relationship and that is why it is used where the bottle is indoors.
What does the volume of gas depend on?
The volume of gas depends on the temperature, pressure, and number of gas particles present. These factors affect the amount of space the gas particles occupy.
How can the volume of gas be increased if the pressure is constant?
I wonder that by increasing temperature it will lead to a higher pressure.
What phase is water in at 75 C and 9atm?
Water is in the liquid phase at 75°C and 9 atm pressure. At this temperature and pressure, water exists as a liquid due to the combination of temperature and pressure conditions present.
