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Why must liquid refrigerant be present for the pressure - temperature relationship to apply?
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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.
How many moles of gas are present when the volume of gas is 100.0 liters the pressure is 3 atmospheres and temperature is -10C?
The answer is 13,89 moles.
If a cold front is present is a high pressure system present?
No, but a low pressure is.
A gas ocupying 60l exerts 2.6 ATM of pressure what is the temperature if 6.o moles of gas are present?
PV = nRT; the rest is just arithmetic.
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.
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
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 present at room temperature and normal atmospheric pressure?
solid. *Sources: MasteringChemistry & college student
Why does water boil at a lower temperature as altitude increases?
Air pressure affects the boiling point. Lower air pressure is present at higher altitudes.
Why is oxgen a gas at room temperature?
Oxygen is a gas at room temperature and room PRESSURE as well...if you increased the pressure it would be in a liquid state but at a very low temperature as well...Because Temperature and pressure are inversely proportional...In other words as pressure goes up temperature goes down at the same rate, (See BOYLES LAW). Also think of ICE, WATER and STEAM...or SOLID, LIQUID and GAS...Pressure is always related when change of temperature is present and visa versa...
Can you over charge ac system?
Yes. Each type of refrigerant has unique pressure/temperature properties. When cool enough or under enough pressure, a gas will condense into a liquid. The point at which this happens is given in a chart. If my car is at ambient temperature (has not been running for a day or more), the pressures on the high side and low side of the system should have equalized and all parts of the a/c system should have equalized to the ambient temperature. For example, if it is 70F I would expect a fully charged r134a system to be pressurized up to (but not exceeding) 71.1psi as read on a gauge. Again, this is the highest pressure you could expect to see when reading the pressure of the high side as well as the low side. Any excess volume of gas will condense into liquid if you try to pressurize the system beyond 71.1psi at 70F. A small amount of this liquid can be tolerated by your system. In a car, a part called the "accumulator" or "receiver/drier" can store excess refrigerant that has been forced to convert to liquid. When there is too much liquid refrigerant in the system, it can overwhelm certain components. Compressors in particular are not designed for compressing liquid. If you are lucky, your system may have either a blow-off valve to release excess pressure to the atmosphere or a high pressure sensor/switch to protect from excessive overcharging. In a running system, the temperature and the pressure of the refrigerant are all over the place as the refrigerant is squeezed, cooled, allowed to expand, and warmed up. To complicate things further, in an automotive application as engine speed varies so to does the speed of the compressor. As the vehicle speed changes or the condenser fan runs, the refrigerant will decrease temperature to varying amounts. The outside temperature, the temperature inside the car (at the evaporator), and even humidity levels affect the efficiency of the system and affect the pressures that are present in the system. But "running pressures" rather than "static pressures" really give the only insight into how effectively the system is able to function. For this reason - It's best to have your a/c serviced by an experienced professional.
How many moles of gas are present when the volume of gas is 100.0 liters the pressure is 3 atmospheres and temperature is -10C?
The answer is 13,89 moles.
When moisture is present in a refrigeration system it will react with the refrigerant and the oil to form?
Ice
When moisture is present in a refrigeration system it will react with the refrigerant and the oil will form?
ACID
What are the examples of solid liquid and gas present in a car?
Steel, Coolant, refrigerant.
