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when the load increases the amount of vapor increases , so the pressure inside the evaporator increases and as we r in the wet region inside the evaporator the pressure and the temp. are proportional so the temp. too will increase
but we use some valves to fix this problem , for example thermostatic expansion valve
it helps add more m dot of the refrigerant so the amount of heat from the load will be distributed over a larger mass so the pressure inside the evaporator will remain the same
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Equalizing lines should be located in multiple condenser and compressor applications where Between condenser and evaporator coils or Near the TXV or Between compressors and condensers or None of them?
oppisite side of txv sensing bulb on outlet of evaporator (suction line)
Will the Evaporator Pressor Regulating valve close if the Thermostatic Expansion Valve is in the evaporator air stream?
The EPR valve should work reguardless of if the TXV is in the air stream. The TXV in the airflow shouldn't make it act any different since it is sensing the temperature at the bulb instead of at the valve it's self.
Effect of moisture on thermostatic expansion valve?
None, a TXV operates by it's sensing bulb sensing superheat of the suction line as it exits the evaporator coil.
What will happen to power delivered by solar cell do when resistance of he load is increased?
A: Nothing will happen if the load increases or even removed the voltage will go to the open voltage condition no harm.
Why does the terminal voltage decreases as the load current increases?
A: That will happen anytime the voltage source is not able to provide the power needed for the load. If the load exceed the power available from the source the voltage will be reduced as IR drop from the source
Where is the bulb of the TXV mounted on?
end of the evaporator on the suction line
Equalizing lines should be located in multiple condenser and compressor applications where Between condenser and evaporator coils or Near the TXV or Between compressors and condensers or None of them?
oppisite side of txv sensing bulb on outlet of evaporator (suction line)
When the evaporator experiences a load increase what happens to the suction pressure?
when the load increases the amount of vapor increases , so the pressure inside the evaporator increases and as we r in the wet region inside the evaporator the pressure and the temp. are proportional so the temp. too will increase but we use some valves to fix this problem , for example thermostatic expansion valve it helps add more m dot of the refrigerant so the amount of heat from the load will be distributed over a larger mass so the pressure inside the evaporator will remain the same
When an evaporator experiences a heat load increase what happens to the suction pressure?
when the load increases the amount of vapor increases , so the pressure inside the evaporator increases and as we r in the wet region inside the evaporator the pressure and the temp. are proportional so the temp. too will increase but we use some valves to fix this problem , for example thermostatic expansion valve it helps add more m dot of the refrigerant so the amount of heat from the load will be distributed over a larger mass so the pressure inside the evaporator will remain the same
Function of expansion valve?
Metering device The metering device controls the flow of liquid refrigerant through the system. The liquid enters at a high-pressure, high-temperature, sub-cooled state and leaves as a low-pressure, low temperature, expanded liquid state. Accurator Piston and Thermostatic Expansion Valves are the most widely used metering devices. Accurator Pistons are widely used because of their low cost and flexibility. The piston can easily be changed to match the capacity of the condensing unit. The Thermostatic Expansion Valve (TXV) is the most efficient type of metering device. The TXV automatically adjusts the flow of the liquid refrigerant based on the superheat of the refrigerant leaving the evaporator coil. As the load on the evaporator increases, the TXV increases the flow of refrigerant. This maintains the proper superheat. The TXV is efficient throughout a variety of system operating conditions, while the accurator is efficient only under designed conditions.
What is a dual port TXV?
Dual port TXV used when system need a large TXV for short periods of time. Dual-port valves have two independent capacities larger port for periods of high load smaller port for periods of normal load TXV capacity is doubled when larger port is open all the way.
Will the Evaporator Pressor Regulating valve close if the Thermostatic Expansion Valve is in the evaporator air stream?
The EPR valve should work reguardless of if the TXV is in the air stream. The TXV in the airflow shouldn't make it act any different since it is sensing the temperature at the bulb instead of at the valve it's self.
Where is the expansion valve for a 2000 Isuzu Rodeo located?
If it's a TXV system, it'll be located between the receiver-drier and the evaporator.
How many tons is Trane central air conditioner model 2TTB2?
It is 2.5 ton with standard non-TXV evaporator coil.
What is the meaning of starved evaporator coil?
It could be restriction or low charge. Meaning you could have a bad txv valve or not enough refrigerant in the system.
Effect of moisture on thermostatic expansion valve?
None, a TXV operates by it's sensing bulb sensing superheat of the suction line as it exits the evaporator coil.
4 major components of refrigeration and airconditioning?
Compressor, Condenser, Meter Device and Evaporator
